Removal of Natural Organic Polyelectrolytes by Adsorption onto Tobermorite

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• 作者：Satoshi Kaneco ; Kumiko Itoh ; Hideyuki Katsumata ; Tohru Suzuki ; Kazuaki Masuyama ; Kunihiro Funasaka ; Kazuyuki Hatano ; and Kiyohisa Ohta
• 刊名：Environmental Science & Technology
• 出版年：2003
• 出版时间：April 1, 2003
• 年：2003
• 卷：37
• 期：7
• 页码：1448 - 1451
• 全文大小：133K
• 年卷期：v.37,no.7(April 1, 2003)
• ISSN：1520-5851

文摘

Natural organic polyelectrolytes, such as humic and fulvicacids, were removed by adsorption onto silicate rocks.Tobermorite, zeolite, and molecular sieves 5A were usedas the adsorbents. Tobermorite was more efficient by 40-50% in the removal of fulvic acids, and by 30-50% forhumic acid than zeolite or molecular sieves, respectively.Humic acid removal from the solution by adsorptiononto silicate rocks took place more readily than fulvicacid removal. From the determined heat of adsorption, theadsorption process in the present study may be chemisorption (ligand exchange). Metal/humic acid complexeswere effectively removed by adsorption onto tobermorite.Because tobermorite (a silicate rock) can be easilysynthesized and obtained commercially, the adsorptionmethod of removal of fulvic and humic acids is superiorto their precipitation.