期刊
BIORESOURCE TECHNOLOGY
卷 96, 期 6, 页码 657-663出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2004.06.023
关键词
spent diatomaceous earth; base-activation; adsorption paraquat; kinetic modeling; isotherm
A spent diatomaceous earth from the beer brewery has been tentatively activated by sodium hydroxide at about 100 degreesC. The resulting product was used as a novel adsorbent for the adsorption of herbicide paraquat from an aqueous solution in a continuously stirred adsorber and batch flasks, respectively. The results showed that the adsorption process could be well described by the pseudo-second-order reaction model. From the view of the negatively charged surface of diatomaceous earth and cationic property of paraquat, the results were also reasonable to be explained by physical adsorption in the ion-exchange process under the effects of pH and temperature. Further, it was found that the Freundlich model appeared to fit the isotherm data better than the Langmuir model. (C) 2004 Elsevier Ltd. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据