start-ver=1.4 cd-journal=joma no-vol=12 cd-vols= no-issue=1 article-no= start-page=161 end-page=165 dt-received= dt-revised= dt-accepted= dt-pub-year=2007 dt-pub=20070315 dt-online= en-article= kn-article= en-subject= kn-subject= en-title=Material Recycling of Municipal Waste Slags by Using Phase Separation of Glass kn-title=ガラスの相分離を利用した都市ゴミ溶融スラグのマテリアルリサイクル en-subtitle= kn-subtitle= en-abstract= kn-abstract=A novel recycling process of municipal waste slags obtaining Fe-free colorless materials was developed by using a phase separation of borosilicate glass. B(2)O(3) was added to a simulated waste slag to promote the phase separation. The slag glasses were heat-treated above glass transition temperatures, from which phase separation was successfully induced. The phase-separated slag glasses were still colored in black due to Fe ions, and after soaking in acid, they were successfully bleached, obtaining colorless solids. According to compositional analyses, no Fe ions were confirmed in the remaining insolubles, indicating that Fe ions were preferentially incorporated into the borate-rich phases soluble in acid. The main constituent of the colorless solids was SiO(2) and the end products obtained in the present process were expected as an alternative of pure silica glass. en-copyright= kn-copyright= en-aut-name=ImaokaTakuya en-aut-sei=Imaoka en-aut-mei=Takuya kn-aut-name=今岡卓也 kn-aut-sei=今岡 kn-aut-mei=卓也 aut-affil-num=1 ORCID= en-aut-name=SakidaShinichi en-aut-sei=Sakida en-aut-mei=Shinichi kn-aut-name=崎田真一 kn-aut-sei=崎田 kn-aut-mei=真一 aut-affil-num=2 ORCID= en-aut-name=NanbaTokuro en-aut-sei=Nanba en-aut-mei=Tokuro kn-aut-name=難波徳郎 kn-aut-sei=難波 kn-aut-mei=徳郎 aut-affil-num=3 ORCID= en-aut-name=MiuraYoshinari en-aut-sei=Miura en-aut-mei=Yoshinari kn-aut-name=三浦嘉也 kn-aut-sei=三浦 kn-aut-mei=嘉也 aut-affil-num=4 ORCID= affil-num=1 en-affil= kn-affil=岡山大学 affil-num=2 en-affil= kn-affil=岡山大学 affil-num=3 en-affil= kn-affil=岡山大学 affil-num=4 en-affil= kn-affil=岡山大学 en-keyword=slag kn-keyword=slag en-keyword=recycling kn-keyword=recycling en-keyword=colorless glass kn-keyword=colorless glass en-keyword=phase separation kn-keyword=phase separation END start-ver=1.4 cd-journal=joma no-vol=30 cd-vols= no-issue= article-no= start-page=39 end-page=44 dt-received= dt-revised= dt-accepted= dt-pub-year=2008 dt-pub=200812 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=鉛フリー光学ガラスとしてのSnO-B(2)O(3)ガラスの光学特性 en-subtitle= kn-subtitle= en-abstract= kn-abstract=The preparation of SnO-B(2)O(3) and SnO-SiO(2) glasses by melting in Ar atomosphere was performed. The prepared SnO-B(2)O(3) glasses were large enough to measure optical properties whereas the vitrification in SnO-SiO(2) system was very difficult. PbO-B(2)O(3) and BiO1.5-B(2)O(3) glasses were also prepared for comparison with SnO-B(2)O(3) glasses. The densities, glass transition temperatures, and optical properties such as refractive indices, dispersion, and transmission spectra of SnO-B(2)O(3), PbO-B(2)O(3), and BiO(1.5)-B(2)O(3) glasses were measured. On the basis of the obtained results, the potential for SnO-B(2)O(3) glasses as lead-free glasses is particularly discussed from the viewpoint of optical properties. en-copyright= kn-copyright= en-aut-name=SakidaShinichi en-aut-sei=Sakida en-aut-mei=Shinichi kn-aut-name=崎田真一 kn-aut-sei=崎田 kn-aut-mei=真一 aut-affil-num=1 ORCID= en-aut-name=NanbaTokuro en-aut-sei=Nanba en-aut-mei=Tokuro kn-aut-name=難波徳郎 kn-aut-sei=難波 kn-aut-mei=徳郎 aut-affil-num=2 ORCID= en-aut-name=MiuraYoshinari en-aut-sei=Miura en-aut-mei=Yoshinari kn-aut-name=三浦嘉也 kn-aut-sei=三浦 kn-aut-mei=嘉也 aut-affil-num=3 ORCID= affil-num=1 en-affil= kn-affil=岡山大学環境管理センター affil-num=2 en-affil= kn-affil=岡山大学環境理工学部環境物質工学科 affil-num=3 en-affil= kn-affil=岡山大学環境理工学部環境物質工学科 en-keyword=SnO-B(2)O(3) glasses kn-keyword=SnO-B(2)O(3) glasses en-keyword=Lead-free glasses kn-keyword=Lead-free glasses en-keyword=Refractive indices kn-keyword=Refractive indices en-keyword=Dispersion kn-keyword=Dispersion en-keyword=Transmittance kn-keyword=Transmittance en-keyword=Optical properties kn-keyword=Optical properties END start-ver=1.4 cd-journal=joma no-vol=29 cd-vols= no-issue= article-no= start-page=11 end-page=15 dt-received= dt-revised= dt-accepted= dt-pub-year=2007 dt-pub=200710 dt-online= en-article= kn-article= en-subject= kn-subject= en-title=Material recycling of blast furnace slag by phase separation of glass kn-title=ガラスの分相現象を利用した高炉水砕スラグの再資源化技術の開発 en-subtitle= kn-subtitle= en-abstract= kn-abstract=A novel recycling process of blast furnace slag was developed in order to obtain colorless silica-rich solids by using phase separation of borosilicate glass. B(2)O(3) was added to blast furnace slag to promote the phase separation. The slag glasses were heat-treated above glass transition temperatures. The slag glass prepared from blast furnace slag gelled after the heat treatment and the subsequent three types of acid treatment. The ratios of SiO(2) component in the gels were 40 ? 60mass%. On the other hand, phase separation was observed on the surface of the slag glasses prepared from pre-treated slag by 2.5N HCl after the heat treatment. After soaking in acid, they did not gel and changed to insoluble colorless solids. According to compositional analyses, it was found that the insoluble colorless solids contained 70 - 90mass% SiO(2). No colored ions such as Cr, Mn, and Fe were confirmed in the remaining insolubles by optical absorption measurement. Therefore, the colorless silica-rich solids were successfully obtained in the present process. The end products obtained in the present process are expected as material of glass. en-copyright= kn-copyright= en-aut-name=SakidaShinichi en-aut-sei=Sakida en-aut-mei=Shinichi kn-aut-name=崎田真一 kn-aut-sei=崎田 kn-aut-mei=真一 aut-affil-num=1 ORCID= en-aut-name=MikamiSyuuhei en-aut-sei=Mikami en-aut-mei=Syuuhei kn-aut-name=三上修平 kn-aut-sei=三上 kn-aut-mei=修平 aut-affil-num=2 ORCID= en-aut-name=NanbaTokuro en-aut-sei=Nanba en-aut-mei=Tokuro kn-aut-name=難波徳郎 kn-aut-sei=難波 kn-aut-mei=徳郎 aut-affil-num=3 ORCID= en-aut-name=MiuraYoshinari en-aut-sei=Miura en-aut-mei=Yoshinari kn-aut-name=三浦嘉也 kn-aut-sei=三浦 kn-aut-mei=嘉也 aut-affil-num=4 ORCID= affil-num=1 en-affil= kn-affil=岡山大学保健環境センター環境安全部門 affil-num=2 en-affil= kn-affil=岡山大学環境理工学部環境物質工学科 affil-num=3 en-affil= kn-affil=岡山大学環境理工学部環境物質工学科 affil-num=4 en-affil= kn-affil=岡山大学環境理工学部環境物質工学科 en-keyword=Blast furnace slag kn-keyword=Blast furnace slag en-keyword=Recycling kn-keyword=Recycling en-keyword=Colorless silica-rich solids kn-keyword=Colorless silica-rich solids en-keyword=Phase separation kn-keyword=Phase separation en-keyword=Glass kn-keyword=Glass END start-ver=1.4 cd-journal=joma no-vol=28 cd-vols= no-issue= article-no= start-page=28 end-page=33 dt-received= dt-revised= dt-accepted= dt-pub-year=2006 dt-pub=200612 dt-online= en-article= kn-article= en-subject= kn-subject= en-title=Studies on optical properties of SnO-based glasses as lead-free glasses kn-title=SnOベースガラスの鉛代替光学ガラスへの応用の検討 en-subtitle= kn-subtitle= en-abstract= kn-abstract=The preparation of SnO-SiO(2), SnO-B(2)O(3), and SnO-GeO(2) glasses by melting in air was performed. The prepared SnO-GeO(2) glasses were large enough to measure optical properties whereas the vitrification in SnO-SiO(2) and SnO-B(2)O(3) systems was difficult. PbO-GeO(2) and BiO(1.5)-GeO(2) glasses were also prepared for comparison with SnO-GeO(2) glasses. The densities, glass transition temperatures, and optical properties such as refractive indices, dispersion, and transmission spectra of SnO-GeO(2), PbO-GeO(2), and BiO(1.5)-GeO(2) glasses were measured. On the basis of the results, the potential for SnO-GeO(2) glasses as lead-free glasses is particularly discussed from the viewpoint of optical properties. en-copyright= kn-copyright= en-aut-name=SakidaShinichi en-aut-sei=Sakida en-aut-mei=Shinichi kn-aut-name=崎田真一 kn-aut-sei=崎田 kn-aut-mei=真一 aut-affil-num=1 ORCID= en-aut-name=MasudaKoichi en-aut-sei=Masuda en-aut-mei=Koichi kn-aut-name=増田紘一 kn-aut-sei=増田 kn-aut-mei=紘一 aut-affil-num=2 ORCID= en-aut-name=NanbaTokuro en-aut-sei=Nanba en-aut-mei=Tokuro kn-aut-name=難波徳郎 kn-aut-sei=難波 kn-aut-mei=徳郎 aut-affil-num=3 ORCID= en-aut-name=MiuraYoshinari en-aut-sei=Miura en-aut-mei=Yoshinari kn-aut-name=三浦嘉也 kn-aut-sei=三浦 kn-aut-mei=嘉也 aut-affil-num=4 ORCID= affil-num=1 en-affil= kn-affil=岡山大学保健環境センター環境安全部門 affil-num=2 en-affil= kn-affil=岡山大学環境理工学部環境物質工学科 affil-num=3 en-affil= kn-affil=岡山大学環境理工学部環境物質工学科 affil-num=4 en-affil= kn-affil=岡山大学環境理工学部環境物質工学科 en-keyword=SnO-based glasses kn-keyword=SnO-based glasses en-keyword=Lead-free glasses kn-keyword=Lead-free glasses en-keyword=Refractive indices kn-keyword=Refractive indices en-keyword=Dispersion kn-keyword=Dispersion en-keyword=Transmittance kn-keyword=Transmittance en-keyword=Optical properties kn-keyword=Optical properties END start-ver=1.4 cd-journal=joma no-vol=30 cd-vols= no-issue= article-no= start-page=73 end-page=73 dt-received= dt-revised= dt-accepted= dt-pub-year=2008 dt-pub=200812 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=編集後記 en-subtitle= kn-subtitle= en-abstract= kn-abstract= en-copyright= kn-copyright= en-aut-name=SakidaShinichi en-aut-sei=Sakida en-aut-mei=Shinichi kn-aut-name=崎田真一 kn-aut-sei=崎田 kn-aut-mei=真一 aut-affil-num=1 ORCID= affil-num=1 en-affil= kn-affil=環境管理センター END start-ver=1.4 cd-journal=joma no-vol=29 cd-vols= no-issue= article-no= start-page=11 end-page=15 dt-received= dt-revised= dt-accepted= dt-pub-year=2007 dt-pub=200710 dt-online= en-article= kn-article= en-subject= kn-subject= en-title=Material recycling of blast furnace slag by phase separation of glass kn-title=ガラスの分相現象を利用した高炉水砕スラグの再資源化技術の開発 en-subtitle= kn-subtitle= en-abstract= kn-abstract=A novel recycling process of blast furnace slag was developed in order to obtain colorless silica−rich solids by using phase separation of borosilicate glass. B(2)O(3) was added to blast furnace slag to promote the phase separation. The slag glasses were heat-treated above glass transition temperatures. The slag glass prepared from blast furnace slag gelled after the heat treatment and the subsequent three types of acid treatment. The ratios of SiO(2) component in the gels were 40 - 60mass%. On the other hand, phase separation was observed on the surface of the slag glasses prepared from pre-treated slag by 2.5N HCI after the heat treatment. After soaking in acid, they did not gel and changed to insoluble colorless solids. According to compositional analyses, it was found that the insoluble colorless solids contained 70 - 90mass% SiO(2). No colored ions such as Cr, Mn, and Fe were confirmed in the remaining insolubles by optical absorption measurement. Therefore, the colorless silica-rich solids were successfully obtained in the present process. The end products obtained in the present process are expected as material of glass. en-copyright= kn-copyright= en-aut-name=SakidaShinichi en-aut-sei=Sakida en-aut-mei=Shinichi kn-aut-name=崎田真一 kn-aut-sei=崎田 kn-aut-mei=真一 aut-affil-num=1 ORCID= en-aut-name=MikamiSyuuhei en-aut-sei=Mikami en-aut-mei=Syuuhei kn-aut-name=三上修平 kn-aut-sei=三上 kn-aut-mei=修平 aut-affil-num=2 ORCID= en-aut-name=NanbaTokuro en-aut-sei=Nanba en-aut-mei=Tokuro kn-aut-name=難波徳郎 kn-aut-sei=難波 kn-aut-mei=徳郎 aut-affil-num=3 ORCID= en-aut-name=MiuraToshinari en-aut-sei=Miura en-aut-mei=Toshinari kn-aut-name=三浦嘉也 kn-aut-sei=三浦 kn-aut-mei=嘉也 aut-affil-num=4 ORCID= affil-num=1 en-affil= kn-affil=岡山大学保健環境センター環境安全部門 affil-num=2 en-affil= kn-affil=岡山大学環境理工学部環境物質工学科 affil-num=3 en-affil= kn-affil=岡山大学環境理工学部環境物質工学科 affil-num=4 en-affil= kn-affil=岡山大学環境理工学部環境物質工学科 en-keyword=Blast furnace slag kn-keyword=Blast furnace slag en-keyword=Recycling kn-keyword=Recycling en-keyword=Colorless silica-rich solids kn-keyword=Colorless silica-rich solids en-keyword=Phase separation kn-keyword=Phase separation en-keyword=Glass kn-keyword=Glass END start-ver=1.4 cd-journal=joma no-vol=29 cd-vols= no-issue= article-no= start-page=50 end-page= dt-received= dt-revised= dt-accepted= dt-pub-year=2007 dt-pub=200710 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=編集後記 en-subtitle= kn-subtitle= en-abstract= kn-abstract= en-copyright= kn-copyright= en-aut-name=SakidaShinichi en-aut-sei=Sakida en-aut-mei=Shinichi kn-aut-name=崎田真一 kn-aut-sei=崎田 kn-aut-mei=真一 aut-affil-num=1 ORCID= affil-num=1 en-affil= kn-affil=岡山大学保健環境センター　環境安全部門 END start-ver=1.4 cd-journal=joma no-vol=27 cd-vols= no-issue= article-no= start-page=17 end-page=18 dt-received= dt-revised= dt-accepted= dt-pub-year=2005 dt-pub=200512 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=岡山大学保健環境センター環境安全部門による「安全の手引き」の作成 en-subtitle= kn-subtitle= en-abstract= kn-abstract= en-copyright= kn-copyright= en-aut-name=SakidaShinichi en-aut-sei=Sakida en-aut-mei=Shinichi kn-aut-name=崎田真一 kn-aut-sei=崎田 kn-aut-mei=真一 aut-affil-num=1 ORCID= affil-num=1 en-affil= kn-affil=岡山大学保健環境センター環境安全部門 END start-ver=1.4 cd-journal=joma no-vol=31 cd-vols= no-issue= article-no= start-page=26 end-page=31 dt-received= dt-revised= dt-accepted= dt-pub-year=2009 dt-pub=200912 dt-online= en-article= kn-article= en-subject= kn-subject= en-title=Material recycling of inorganic sludge by wet ball milling kn-title=湿式ボールミル法を用いた無機性汚泥の再資源化技術の開発 en-subtitle= kn-subtitle= en-abstract= kn-abstract=The possibility of material recycling of inorgamic sludge by wet ball milling with distrilled water and an ethylenediaminetetraacetic acid disodium salt dehydrate (EDTA・2Na・2H(2)O)reagent was investigated. The inorganic sludge consisted of 14.1mass% of the heat-treated sludge obtained after drying and heat treatment, 20.1mass% of active carbon, and 65.9mass% of water. The wet ball milling of the heat-treated sludge was performed using a ball pot and balls in air for 40 h at room temperature with the rotational speed fixed at 200rpm. The fractions of Mn, Fe, Ni, Cu, and Zr in the specimens obtained by wet-ball-milling the heat-treated sludge decreased and those of Si and Al increased. Appropriate content of distilled water and weight of the heat-treated sludge for wet ball milling were 150-250 ml and 4.5 g or less, respectively. When the wet ball milling of the heat-treated sludge was perfomed twice,the fractions of Mn, Fe, Ni, Cu, and Zr in the specimen obtained after repeated wet ball milling remarkably decreased and that of Si increased in comparison with those in the specimens wet-ball-milled once. This suggests that the repeat of wet ball milling of the heat-treated sludge leads to a colorless specimen without colored ions such as Mn, Fe, Ni, and Cu. en-copyright= kn-copyright= en-aut-name=SakidaShinichi en-aut-sei=Sakida en-aut-mei=Shinichi kn-aut-name=崎田真一 kn-aut-sei=崎田 kn-aut-mei=真一 aut-affil-num=1 ORCID= en-aut-name=KurodaRyusuke en-aut-sei=Kuroda en-aut-mei=Ryusuke kn-aut-name=黒田龍介 kn-aut-sei=黒田 kn-aut-mei=龍介 aut-affil-num=2 ORCID= en-aut-name=BeninoYasuhiko en-aut-sei=Benino en-aut-mei=Yasuhiko kn-aut-name=紅野安彦 kn-aut-sei=紅野 kn-aut-mei=安彦 aut-affil-num=3 ORCID= en-aut-name=NanbaTokuro en-aut-sei=Nanba en-aut-mei=Tokuro kn-aut-name=難波徳郎 kn-aut-sei=難波 kn-aut-mei=徳郎 aut-affil-num=4 ORCID= affil-num=1 en-affil= kn-affil=岡山大学環境管理センター affil-num=2 en-affil= kn-affil=岡山大学環境理工学部環境物質工学科 affil-num=3 en-affil= kn-affil=岡山大学環境理工学部環境物質工学科 affil-num=4 en-affil= kn-affil=岡山大学環境理工学部環境物質工学科 en-keyword=Inorganic sludge kn-keyword=Inorganic sludge en-keyword=EDTA kn-keyword=EDTA en-keyword=Wet ball milling kn-keyword=Wet ball milling en-keyword=Recycling kn-keyword=Recycling END start-ver=1.4 cd-journal=joma no-vol=118 cd-vols= no-issue=1379 article-no= start-page=603 end-page=607 dt-received= dt-revised= dt-accepted= dt-pub-year=2010 dt-pub=201007 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Phase separation of borosilicate glass containing sulfur en-subtitle= kn-subtitle= en-abstract= kn-abstract=A 10Na(2)S?30B(2)O(3)?60SiO(2) (mol %) glass was prepared, and the changes in glass structure and chemical state of sulfur caused by phase separation were investigated. In the as-prepared and heat-treated glasses, sulfur was present as S(2)? anion and polysulfide S(2)? and S(3)? anions, and Si?S and B?S bonds were not confirmed. A phase separation by spinodal decomposition was observed after heat-treatment, where sulfur was preferentially distributed to borate-rich phase. Even after the phase separation, formation of non-bridging oxygen was not recognized. The preferential distribution of sulfur anions in the present glass was explainable on the basis of the change in population of sodium ions, which compensated the negatively-charged sulfur anions. en-copyright= kn-copyright= en-aut-name=SaikiKeiji en-aut-sei=Saiki en-aut-mei=Keiji kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=1 ORCID= en-aut-name=SakidaShinichi en-aut-sei=Sakida en-aut-mei=Shinichi kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=2 ORCID= en-aut-name=BeninoYasuhiko en-aut-sei=Benino en-aut-mei=Yasuhiko kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=3 ORCID= en-aut-name=NanbaTokuro en-aut-sei=Nanba en-aut-mei=Tokuro kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=4 ORCID= affil-num=1 en-affil= kn-affil=Graduate School of Environmental Science, Okayama University affil-num=2 en-affil= kn-affil=Environmental Management Center, Okayama University affil-num=3 en-affil= kn-affil=Graduate School of Environmental Science, Okayama University affil-num=4 en-affil= kn-affil=Graduate School of Environmental Science, Okayama University en-keyword=Phase separation kn-keyword=Phase separation en-keyword=Borosilicate glass kn-keyword=Borosilicate glass en-keyword=Chemical state of sulfur kn-keyword=Chemical state of sulfur en-keyword=Glass structure kn-keyword=Glass structure END start-ver=1.4 cd-journal=joma no-vol=117 cd-vols= no-issue=1371 article-no= start-page=1195 end-page=1198 dt-received= dt-revised= dt-accepted= dt-pub-year=2009 dt-pub=200911 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Chemical recycling of municipal waste slag by using phase separation en-subtitle= kn-subtitle= en-abstract= kn-abstract=A chemical recycling method by using phase separation was applied to municipal waste slags. Glasses were prepared from incineration ash and ash-melted slag, where B(2)O(3) was added to promote phase separation. The glasses were heat-treated at temperatures higher than their glass transition temperatures, and they were soaked in hydrochloric acid, leaching CaO, Fe(2)O(3), K(2)O, and S. Transparent and colorless solids containing ca. 80 mass% of SiO(2) were successfully obtained as residues. It was suggested that phase separation took place not in the heat-treatment but in the vitrification process, and further characterizations are however required to investigate the phenomena at microscopic levels in the recycling processes. en-copyright= kn-copyright= en-aut-name=NanbaTokuro en-aut-sei=Nanba en-aut-mei=Tokuro kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=1 ORCID= en-aut-name=KurodaYutaro en-aut-sei=Kuroda en-aut-mei=Yutaro kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=2 ORCID= en-aut-name=SakidaShinichi en-aut-sei=Sakida en-aut-mei=Shinichi kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=3 ORCID= en-aut-name=BeninoYasuhiko en-aut-sei=Benino en-aut-mei=Yasuhiko kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=4 ORCID= affil-num=1 en-affil= kn-affil=Graduate School of Environmental Science, Okayama University affil-num=2 en-affil= kn-affil=Faculty of Environmental Science and Technology, Okayama University affil-num=3 en-affil= kn-affil=Environmental Management Center, Okayama University affil-num=4 en-affil= kn-affil=Graduate School of Environmental Science, Okayama University en-keyword=Municipal waste slag kn-keyword=Municipal waste slag en-keyword=Waste recycling kn-keyword=Waste recycling en-keyword=Chemical recycling kn-keyword=Chemical recycling en-keyword=Glass kn-keyword=Glass END start-ver=1.4 cd-journal=joma no-vol=116 cd-vols= no-issue=1350 article-no= start-page=220 end-page=223 dt-received= dt-revised= dt-accepted= dt-pub-year=2008 dt-pub=200802 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Chemical recycling of inorganic wastes by using phase separation of glass en-subtitle= kn-subtitle= en-abstract= kn-abstract=A chemical recycling process using phase separation of glass was applied to a granulated blast furnace slag with high CaO content. Glasses were prepared by adding B(2)O(3) to the slag in order to promote phase separation, and the glasses were heat-treated above glass transition temperature. In the subsequent acid-treatment, however, gelation due to the elution of SiO(2) phase containing CaO occurred, not obtaining high SiO(2) solids. Then, pretreatment was introduced to reduce CaO content in slag, where the raw slag was briefly washed in acid. The slag glasses prepared from the pretreated slag were commonly phase-separated by heat-treatment regardless of B(2)O(3) content. After subsequent acid-treatment, colorless insoluble solids were successfully recovered. The end products consist of 70-90 mass% SiO(2), and coloring ions such as Mn, Fe and Cr were almost completely removed from the slag glasses. Reutilization as raw materials for glass is expected. en-copyright= kn-copyright= en-aut-name=NanbaTokuro en-aut-sei=Nanba en-aut-mei=Tokuro kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=1 ORCID= en-aut-name=MikamiShuhei en-aut-sei=Mikami en-aut-mei=Shuhei kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=2 ORCID= en-aut-name=ImaokaTakuya en-aut-sei=Imaoka en-aut-mei=Takuya kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=3 ORCID= en-aut-name=SakidaShinichi en-aut-sei=Sakida en-aut-mei=Shinichi kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=4 ORCID= en-aut-name=MiuraYoshinari en-aut-sei=Miura en-aut-mei=Yoshinari kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=5 ORCID= affil-num=1 en-affil= kn-affil=Graduate School of Environmental Science, Okayama University affil-num=2 en-affil= kn-affil=Graduate School of Environmental Science, Okayama University affil-num=3 en-affil= kn-affil=Graduate School of Environmental Science, Okayama University affil-num=4 en-affil= kn-affil=Health and Environment Center, Okayama University affil-num=5 en-affil= kn-affil=Graduate School of Environmental Science, Okayama University en-keyword=Blast furnace slag kn-keyword=Blast furnace slag en-keyword=Waste recycling kn-keyword=Waste recycling en-keyword=Chemical recycling kn-keyword=Chemical recycling en-keyword=Phase separation kn-keyword=Phase separation en-keyword=Glass kn-keyword=Glass END start-ver=1.4 cd-journal=joma no-vol=113 cd-vols= no-issue=1313 article-no= start-page=44 end-page=50 dt-received= dt-revised= dt-accepted= dt-pub-year=2005 dt-pub=200501 dt-online= en-article= kn-article= en-subject= kn-subject= en-title=酸化物ガラスの塩基度と XPS による O1s 化学シフトの相関に関する考察 kn-title=Consideration on the Correlation between Basicity of Oxide Glasses and O1s Chemical Shift in XPS en-subtitle= kn-subtitle= en-abstract= kn-abstract=O1s binding energy measured by X-ray photoelectron spectroscopy (XPS) is candidate as a new tool to determine a new scale of Lewis basicity of oxide ions in glass. Some mathematical expressions for the basicity or XPS chemical shift, such as charge parameter and optical basicity, were compared with the experimental O1s binding energy in binary alkali oxide glasses. The expressions so far in use needed some modification in parameters. A new empirical expression introduced in this paper gives a new concept and universal scale of basicity. en-copyright= kn-copyright= en-aut-name=NanbaTokuro en-aut-sei=Nanba en-aut-mei=Tokuro kn-aut-name=難波徳郎 kn-aut-sei=難波 kn-aut-mei=徳郎 aut-affil-num=1 ORCID= en-aut-name=MiuraYoshinari en-aut-sei=Miura en-aut-mei=Yoshinari kn-aut-name=三浦嘉也 kn-aut-sei=三浦 kn-aut-mei=嘉也 aut-affil-num=2 ORCID= en-aut-name=SakidaShinichi en-aut-sei=Sakida en-aut-mei=Shinichi kn-aut-name=崎田真一 kn-aut-sei=崎田 kn-aut-mei=真一 aut-affil-num=3 ORCID= affil-num=1 en-affil= kn-affil=Department of Environmental Chemistry and Materials, Okayama University affil-num=2 en-affil= kn-affil=Department of Environmental Chemistry and Materials, Okayama University affil-num=3 en-affil= kn-affil=Health and Environment Center, Okayama University en-keyword=XPS kn-keyword=XPS en-keyword=Basicity kn-keyword=Basicity en-keyword=Glass kn-keyword=Glass en-keyword=O1s binding energy kn-keyword=O1s binding energy en-keyword=Chemical shift kn-keyword=Chemical shift END start-ver=1.4 cd-journal=joma no-vol=33 cd-vols= no-issue= article-no= start-page=6 end-page=12 dt-received= dt-revised= dt-accepted= dt-pub-year=2012 dt-pub=201202 dt-online= en-article= kn-article= en-subject= kn-subject= en-title=Material recycling of inorganic slag by wet ball milling kn-title=湿式ボールミル法を用いた無機性産業廃棄物の再資源化技術の開発 en-subtitle= kn-subtitle= en-abstract= kn-abstract=The possibility of material recycling of inorganic slag by wet ball milling with distilled water and an ethylenediaminetetraacetic acid disodium salt dehydrate (EDTA?2Na?2H2O) reagent was investigated. The wet ball milling of the simulated waste slag powder was performed using a ball mill pot and balls in air for 10 - 100 h at room temperature with the rotational speed fixed at 200 rpm. The fractions of CaO and Fe2O3 in the specimens obtained by wet-ball-milling the simulated waste slag powder decreased, that of SiO2 increased, and those of Al2O3 and Na2O hardly changed. These specimens contained 0.1 ? 0.8mass% ZrO2. Appropriate solution and time for wet ball milling were 300 ml distilled water and 20 h, respectively. When the wet ball milling of the simulated waste slag powder was performed twice, the fractions of CaO, Al2O3 and Fe2O3 in the specimen obtained after repeated wet ball milling decreased, those of SiO2 and ZrO2 increased and that of Na2O hardly changed in comparison with those in the specimen wet-ball-milled once. The insoluble end product obtained by soaking the specimen wet-ball-milled once in 6M HCl for 20 hours was composed of 98.5mass% SiO2 and 0.6mass% or less other oxides and is usable as glass material. en-copyright= kn-copyright= en-aut-name=SakidaShinichi en-aut-sei=Sakida en-aut-mei=Shinichi kn-aut-name=崎田真一 kn-aut-sei=崎田 kn-aut-mei=真一 aut-affil-num=1 ORCID= en-aut-name=BeninoYasuhiko en-aut-sei=Benino en-aut-mei=Yasuhiko kn-aut-name=紅野安彦 kn-aut-sei=紅野 kn-aut-mei=安彦 aut-affil-num=2 ORCID= en-aut-name=NanbaTokuro en-aut-sei=Nanba en-aut-mei=Tokuro kn-aut-name=難波徳郎 kn-aut-sei=難波 kn-aut-mei=徳郎 aut-affil-num=3 ORCID= affil-num=1 en-affil= kn-affil=岡山大学環境管理センター affil-num=2 en-affil= kn-affil=岡山大学環境理工学部環境物質工学科 affil-num=3 en-affil= kn-affil=岡山大学環境理工学部環境物質工学科 en-keyword=Inorganic slag kn-keyword=Inorganic slag en-keyword=EDTA kn-keyword=EDTA en-keyword=Wet ball milling kn-keyword=Wet ball milling en-keyword=Recycling kn-keyword=Recycling END start-ver=1.4 cd-journal=joma no-vol=34 cd-vols= no-issue= article-no= start-page=36 end-page=37 dt-received= dt-revised= dt-accepted= dt-pub-year=2012 dt-pub=201212 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=教養教育科目「サステイナブル・キャンパスを目指して」の開講 en-subtitle= kn-subtitle= en-abstract= kn-abstract= en-copyright= kn-copyright= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=崎田真一 kn-aut-sei=崎田 kn-aut-mei=真一 aut-affil-num=1 ORCID= affil-num=1 en-affil= kn-affil=岡山大学環境管理センター END start-ver=1.4 cd-journal=joma no-vol=1 cd-vols= no-issue=1 article-no= start-page=108 end-page=113 dt-received= dt-revised= dt-accepted= dt-pub-year=2013 dt-pub=201303 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Distribution behavior of inorganic constituents in chemical recycling processes of a municipal waste slag en-subtitle= kn-subtitle= en-abstract= kn-abstract= en-copyright= kn-copyright= en-aut-name=OmuraKohei en-aut-sei=Omura en-aut-mei=Kohei kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=1 ORCID= en-aut-name=SakidaShinichi en-aut-sei=Sakida en-aut-mei=Shinichi kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=2 ORCID= en-aut-name=BeninoYasuhiko en-aut-sei=Benino en-aut-mei=Yasuhiko kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=3 ORCID= en-aut-name=NanbaTokuro en-aut-sei=Nanba en-aut-mei=Tokuro kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=4 ORCID= affil-num=1 en-affil= kn-affil=Graduate School of Environmental Science, Okayama University affil-num=2 en-affil= kn-affil=Environmental Management Center, Okayama University affil-num=3 en-affil= kn-affil=Graduate School of Environmental Science, Okayama University affil-num=4 en-affil= kn-affil=Graduate School of Environmental Science, Okayama University en-keyword=Chemical recycling of wastes kn-keyword=Chemical recycling of wastes en-keyword=Glass kn-keyword=Glass en-keyword=Phase separation kn-keyword=Phase separation en-keyword=Dissolution?reprecipitation kn-keyword=Dissolution?reprecipitation en-keyword=Elemental mapping kn-keyword=Elemental mapping END start-ver=1.4 cd-journal=joma no-vol=19 cd-vols= no-issue=1 article-no= start-page=22 end-page=25 dt-received= dt-revised= dt-accepted= dt-pub-year=2014 dt-pub=201403 dt-online= en-article= kn-article= en-subject= kn-subject= en-title=Material design for the ceramics coating with high mold releasability by using molecular orbital calculations kn-title=分子軌道計算による高い離型性を有するセラミックスコーティングの材料設計 en-subtitle= kn-subtitle= en-abstract= kn-abstract=　To explore the ceramic materials appropriate for the coatings with high mold releasability, molecular orbital (MO) calculations have been applied to the ceramics with NaCl structure, such as TiN, TiC, CrN, etc. Chemical bonding characters were evaluated based on the MO calculations, which were correlated to the experimental surface free energy. The dispersion and polar components of surface free energy indicated high correlation with the bond overlap population of the surface bonds and the net charge of inside atoms of the cluster models, respectively. Among the ceramic materials investigated, MoN had the lowest surface free energy, being expected to be most suitable as the ceramic coating material with high releasability en-copyright= kn-copyright= en-aut-name=NanbaTokuro en-aut-sei=Nanba en-aut-mei=Tokuro kn-aut-name=難波徳郎 kn-aut-sei=難波 kn-aut-mei=徳郎 aut-affil-num=1 ORCID= en-aut-name=FujiharaJiro en-aut-sei=Fujihara en-aut-mei=Jiro kn-aut-name=藤原二朗 kn-aut-sei=藤原 kn-aut-mei=二朗 aut-affil-num=2 ORCID= en-aut-name=SakidaShinichi en-aut-sei=Sakida en-aut-mei=Shinichi kn-aut-name=崎田真一 kn-aut-sei=崎田 kn-aut-mei=真一 aut-affil-num=3 ORCID= en-aut-name=BeninoYasuhiko en-aut-sei=Benino en-aut-mei=Yasuhiko kn-aut-name=紅野安彦 kn-aut-sei=紅野 kn-aut-mei=安彦 aut-affil-num=4 ORCID= affil-num=1 en-affil= kn-affil=岡山大学環境理工学部環境物質工学科 affil-num=2 en-affil= kn-affil=岡山大学環境理工学部環境物質工学科 affil-num=3 en-affil= kn-affil=岡山大学環境管理センター affil-num=4 en-affil= kn-affil=岡山大学環境理工学部環境物質工学科 en-keyword=Material design kn-keyword=Material design en-keyword=Ceramic coating kn-keyword=Ceramic coating en-keyword=Releasability kn-keyword=Releasability en-keyword=Molecular orbital calculation kn-keyword=Molecular orbital calculation END start-ver=1.4 cd-journal=joma no-vol=592 cd-vols= no-issue= article-no= start-page=121751 end-page= dt-received= dt-revised= dt-accepted= dt-pub-year=2022 dt-pub=20220915 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Effect of bond valence sum on the structural modeling of lead borate glass en-subtitle= kn-subtitle= en-abstract= kn-abstract=The structural model of 66.7PbO-33.3B2O3 glass was constructed using a reverse Monte Carlo (RMC) method, in which bond valence sum (BVS) was added as a constraint condition to suppress formation of unrealistic local structures. Based on the crystal structures, the optimal BVS calculating conditions were determined. As a result, BVS distributions with small deviation were successfully achieved without lowering the reproducibility of other experimental constraints. The geometric asymmetry of PbOn polyhedra was evaluated from the eccentric distance between Pb and gravity center of oxygen atoms. The average eccentric distance was shorter than that in the lead borate crystals, indicating less asymmetry of PbOn units in the RMC glass model. The connectivity between BOn and PbOn units was investigated. It was consequently concluded that the glass had a different network structure from the crystal with the same composition, which might be due to the different chemical bonding character between the lead borate glasses and crystals. en-copyright= kn-copyright= en-aut-name=NagaoMasaaki en-aut-sei=Nagao en-aut-mei=Masaaki kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=1 ORCID= en-aut-name=SakidaShinichi en-aut-sei=Sakida en-aut-mei=Shinichi kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=2 ORCID= en-aut-name=BeninoYasuhiko en-aut-sei=Benino en-aut-mei=Yasuhiko kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=3 ORCID= en-aut-name=NanbaTokuro en-aut-sei=Nanba en-aut-mei=Tokuro kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=4 ORCID= en-aut-name=MukunokiAtsushi en-aut-sei=Mukunoki en-aut-mei=Atsushi kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=5 ORCID= en-aut-name=ChibaTamotsu en-aut-sei=Chiba en-aut-mei=Tamotsu kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=6 ORCID= en-aut-name=KikuchiTakahiro en-aut-sei=Kikuchi en-aut-mei=Takahiro kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=7 ORCID= en-aut-name=SakuragiTomofumi en-aut-sei=Sakuragi en-aut-mei=Tomofumi kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=8 ORCID= en-aut-name=OwadaHitoshi en-aut-sei=Owada en-aut-mei=Hitoshi kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=9 ORCID= affil-num=1 en-affil=Graduate School of Environmental and Life Science, Okayama University kn-affil= affil-num=2 en-affil=Environmental Management Center, Okayama University kn-affil= affil-num=3 en-affil=Graduate School of Environmental and Life Science, Okayama University kn-affil= affil-num=4 en-affil=Graduate School of Environmental and Life Science, Okayama University kn-affil= affil-num=5 en-affil=JGC Japan Corporation kn-affil= affil-num=6 en-affil=JGC Japan Corporation kn-affil= affil-num=7 en-affil=JGC Japan Corporation kn-affil= affil-num=8 en-affil=Radioactive Waste Management Funding and Research Center kn-affil= affil-num=9 en-affil=Radioactive Waste Management Funding and Research Center kn-affil= en-keyword=Lead borate glass kn-keyword=Lead borate glass en-keyword=Reverse Monte Carlo modeling kn-keyword=Reverse Monte Carlo modeling en-keyword=Bond valence sum kn-keyword=Bond valence sum en-keyword=Coordination polyhedron kn-keyword=Coordination polyhedron END