Uptake and recovery of gold ions from electroplating wastes using eggshell membrane
Uptake and recovery of gold ions from electroplating wastes using eggshell membrane
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DOI：
10.1016/s0960-8524(01)00134-1
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发表时间：
2002-02-01
影响因子：
11.4
通讯作者：
Itoh, M
中科院分区：
文献类型：
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作者：
Ishikawa, S;Suyama, K;Itoh, M
研究了动物副产品鸡蛋壳膜（ESM）对溶液和电镀废水中金离子（二氰金（I）和四氯金（III））的吸附能力。金的吸收取决于pH、温度和溶液中存在的共离子，pH 3.0为最佳值。平衡数据遵循Langmuir等温模型，最大容量分别为147 mg Au（I）/g干重和618 mg Au（III）/g。解吸吸附的金（I）与0.1摩尔/升的NaOH导致通过五个连续的吸附/解吸循环的生物吸附剂的金的吸收能力没有变化。在柱实验中，注意到从含有各种金属离子的电镀废水中选择性地回收金。吸附金属的亲合力大小为Au > Ag > Co > Cu > Pb > Ni > Zn。(C)2001爱思唯尔科技有限公司版权所有。
The animal byproduct, hen eggshell membrane (ESM), was evaluated for its ability to sorb gold ions (dicyanoaurate(I) and tetrachloroaurate(III)) from solutions and electroplating wastewater. The gold uptake was dependent on pH, temperature and co-ions present in the solutions, with pH 3,0 being the optimum value. The equilibrium data followed the Langmuir isotherm model with maximum capacities of 147 mg Au(I)/g dry weight and 618 mg Au(III)/g, respectively. Desorption of sorbed gold(I) with 0.1 mol/l NaOH resulted in no changes of the biosorbent gold uptake capacity through five consecutive sorption/desorption cycles. In column experiments, selective recovery of gold from electroplating wastewater containing various metal ions was noted. The affinity of metal sorption was in the order Au > Ag > Co > Cu > Pb > Ni > Zn. (C) 2001 Elsevier Science Ltd. All rights reserved.