改性花生壳对氰化废水中Cu和CN−的吸附技术及机理

Ya-li Zhang, Jing Yang, Xian-jin Yu, Qinglong Wang, Wenqiang Huang
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引用次数: 6

摘要

以花生壳为原料,经H3PO4化学活化和炭化制备改性花生壳(MPS),并对改性花生壳进行了xrd、SEM和EDS表征。考察了pH、吸附剂用量、温度和时间对MPS吸附Cu和CN−的影响。采用Langmuir和Freundlich模型模拟了铜在不同温度下的吸附等温线。计算了热力学数据,结果表明铜在MPS上的吸附过程是自发的吸热过程。拟二级动力学模型与Cu的实验曲线拟合较好,CN−的吸附曲线与拟一级动力学模型拟合较好。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Adsorption Technology and Mechanism of Cu and CN− From Cyanide Waste Water on Modified Peanut Shell
Modified peanut shell (MPS) was prepared from peanut hull by chemical activation with H3PO4 and carbonized, which was characterized by micrometrics ASAP-20, SEM, and EDS. Adsorption of Cu and CN− on MPS was investigated as a function of pH, adsorbent dosage, temperature and time. The Langmuir and Freundlich models were used to simulate the adsorption isotherms of Cu at different temperature. The thermodynamic date were calculated, the results suggest that adsorption process of Cu on MPS was spontaneous and endothermic. Pseudo second-order kinetic model fits the experimental curves of Cu well and adsorption curve of CN− fits the pseudo first-order kinetic model.
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