Simultaneous removal of phosphate and nitrite ions from aqueous solutions using modified soybean waste

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• 作者：Fumihiko Ogata^a ; ^{ogata@phar.kindai.ac.jp" class="auth_mail" title="E-mail the corresponding author} ; Ayaka Ueda^a ; Shigeharu Tanei^b ; Daisuke Imai^a ; Naohito Kawasaki^a ; ^c ; ^{kawasaki@phar.kindai.ac.jp" class="auth_mail" title="E-mail the corresponding author}
• 关键词：Phosphate ion ; Nitrite ion ; Soybean ; Adsorption ; Waste biomass
• 刊名：Journal of Industrial and Engineering Chemistry
• 出版年：2016
• 出版时间：25 March 2016
• 年：2016
• 卷：35
• 期：Complete
• 页码：287-294
• 全文大小：2070 K

文摘

We investigated the simultaneous removal of phosphate and nitrite ions from aqueous solutions by a combination treatment that used both PG-Ca (poly-γ-glutamic acid combined with flocculating agents) and SB600 (soybeans treated with calcium chloride, hydrochloric acid and calcined at 600 °C). Phosphate ions and nitrite ions were selectivity adsorbed by PG-Ca and SB600, respectively. The removal mechanism of phosphate ions from aqueous solution was related to the presence of calcium hydroxide (derived from PG-Ca), and that of nitrite ions was related to the presence of chloride ions at the surface of SB600.