Adsorption of copper onto agriculture waste materials
Adsorption of copper onto agriculture waste materials
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DOI：
10.1016/j.jhazmat.2010.04.050
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发表时间：
2010-08-15
影响因子：
13.6
通讯作者：
Gutierrez, Claudia
中科院分区：
文献类型：
--
作者：
Hansen, Henrik K.;Arancibia, Fernanda;Gutierrez, Claudia
采矿活动产生大量废水，其中重金属浓度高于立法阈值。因此，处理是必要的，最近人们关注更环保的方法。其中之一是生物吸附，即通过生物来源的材料从废水中吸附重金属。在这项工作中，研究了不同低成本残留农业材料的铜吸附能力、动力学和等温线。研究了七种不同的材料：花生壳、坚果壳、李子籽、桉树皮、橄榄核、桃核和松木屑。橄榄核、桃核和松木屑在酸性 pH 条件下获得最佳吸附效果。此外，据观察，在较高的 pH 值下，建立平衡之前需要较长的持续时间。一般来说，较好的生物吸附剂是桃核和松木屑，在酸性pH下的吸附能力约为10-15 mgCu g(-1)生物吸附剂。此外还发现，Ho 和 McKay 二阶模型非常令人满意地描述了吸附动力学。 Langmuir 和 Freundlich 模型都很好地描述了所研究的生物吸附剂的平衡吸附等温线 - 最后一个模型稍好一些。 (C) 2010 Elsevier B.V. 保留所有权利。
Mining activities generate large amounts of wastewater, which contain heavy metals of elevated concentration according to legislative threshold values. Therefore, treatment is necessary, and there has been a recent focus on more environmentally friendly methods. One of these is biosorption, where heavy metals are adsorbed from the wastewater via materials of biological origin. In this work copper sorption capacity, kinetics and isotherms of different low-cost residual agricultural materials was studied. Seven different materials were investigated: peanut shells, nut shells, plum seeds, eucalyptus bark, olive pips, peach stones, and pine sawdust. The best sorption results were obtained in acidic pH for olive pips, peach stones and pine sawdust. Furthermore, it was observed that at higher pH, a longer duration of time is required before equilibrium is established. In general, the better biosorbents were found to be peach stones and pine sawdust with a sorption capacity at acidic pH around 10-15 mgCu g(-1) biosorbent. In addition it was found, that the Ho and McKay second order model described the sorption kinetics very satisfactorily. Both Langmuir and Freundlich models described the equilibrium sorption isotherms well for the biosorbents studied - with the last model being slightly better. (C) 2010 Elsevier B.V. All rights reserved.