Removal of copper (II) from aqueous solution by adsorption onto low-cost adsorbents
Removal of copper (II) from aqueous solution by adsorption onto low-cost adsorbents
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DOI：
10.1016/j.jenvman.2007.01.005
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发表时间：
2008-04-01
影响因子：
8.7
通讯作者：
Yerlikaya, Cigdem
中科院分区：
文献类型：
--
作者：
Aydin, Haluk;Buluta, Yasemin;Yerlikaya, Cigdem
研究了低成本吸附剂的使用，以取代目前昂贵的从水溶液中去除金属的方法。研究了小扁豆壳（LS）、小麦壳（WS）、稻壳（RS）等不同吸附剂对铜（11）的去除效果。平衡吸附水平是溶液pH、温度、接触时间、初始吸附浓度和吸附剂剂量的函数。测定了Cu （II）在吸附剂上的吸附等温线，并与Langmuir和Freundlich模型等常用等温线方程进行了关联。在293、313和333 K温度下，LS、WS和RS吸附剂对Cu（11）的最大吸附量分别为8.977、9.510和9.588；7.391, 16.077和17.422；分别为1.854、2.314和2.954 mg g（-1）。通过计算吸附Cu （II）的自由能（G(0)）、焓（H-0）和熵变（S-0）等热力学参数来预测吸附过程的性质。并对吸附过程的动力学及控制因素进行了研究。当地可用的吸附剂被发现是低成本和有希望从水溶液中去除Cu （II）。(C) 2007 Elsevier Ltd.版权所有。
The use of low-cost adsorbents was investigated as a replacement for current costly methods of removing metals from aqueous solution. Removal of copper (11) from aqueous solution by different adsorbents such as shells of lentil (LS), wheat (WS), and rice (RS) was investigated. The equilibrium adsorption level was determined as a function of the solution pH, temperature, contact time, initial adsorbate concentration and adsorbent doses. Adsorption isotherms of Cu (II) on adsorbents were determined and correlated with common isotherm equations such as Langmuir and Freundlich models. The maximum adsorption capacities for Cu (11) on LS, WS and RS adsorbents at 293, 313 and 333 K temperature were found to be 8.977, 9.510, and 9.588; 7.391, 16.077, and 17.422; 1.854, 2.314, and 2.954 mg g(-1), respectively. The thermodynamic parameters such as free energy (Delta G(0)), enthalpy (Delta H-0) and entropy changes (Delta S-0) for the adsorption of Cu (II) were computed to predict the nature of adsorption process. The kinetics and the factors controlling the adsorption process were also studied. Locally available adsorbents were found to be low-cost and promising for the removal of Cu (II) from aqueous solution. (C) 2007 Elsevier Ltd. All rights reserved.