Mercury removal from water using activated carbons derived from organic sewage sludge
Mercury removal from water using activated carbons derived from organic sewage sludge
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DOI：
10.1016/j.watres.2004.09.027
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发表时间：
2005-01-01
期刊：
影响因子：
12.8
通讯作者：
Itoh, H
中科院分区：
文献类型：
--
作者：
Zhang, FS;Nriagu, JO;Itoh, H
以有机污泥（SS）为原料，采用H2SO4、H3PO4和ZnCl2为化学活化剂，制备了不同类型的活性炭，并对水溶液中的Hg（II）进行了有效的吸附实验。由于化学活化，活性炭的质量显著提高。ZnCl2活性炭对Hg（II）的吸附能力最强，其次是H3PO4和H2SO4活性炭。吸附过程受溶液浓度、pH值和活性炭投加量的影响较大，吸附符合Lagergren一级速率方程和Freundlich吸附等温式。解吸结果表明，约60%至80%的吸附汞（II）可以回收从碳到0.1 M硝酸溶液通过超声处理。因此，本研究所开发之活性炭在工业废水除汞处理上是有效且实用的。(C)2004爱思唯尔有限公司保留所有权利。
Various types of activated carbons were developed from organic sewage sludge (SS) using H2SO4, H3PO4 and ZnCl2 as chemical activation reagents, and the removal of Hg(II) from aqueous solution by these carbons was effectively demonstrated. The quality of the activated carbons was dramatically improved owing to chemical activation. ZnCl2 activated carbon had the highest capability for Hg(II) adsorption, followed by H3PO4 and H2SO4 activated carbons. The adsorption was greatly affected by Hg(II) concentration, solution pH and carbon dosage, and followed Lagergren first order rate equation and Freundlich isotherm model. Desorption results indicated that around 60% to 80% of the adsorbed Hg(II) could be recovered from the carbons to 0.1 M HNO3 solution by sonication treatment. Accordingly, it is believed that the activated carbons developed in this study are effective and practical for utilization in industrial wastewater treatment for mercury removal. (C) 2004 Elsevier Ltd. All rights reserved.