Cu2+, Cd2+ and Pb2+ adsorption from aqueous solutions by pyrite and synthetic iron sulphide
Cu2+, Cd2+ and Pb2+ adsorption from aqueous solutions by pyrite and synthetic iron sulphide
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DOI：
10.1016/j.jhazmat.2006.02.051
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发表时间：
2006-09-01
影响因子：
13.6
通讯作者：
Erdem, Mehmet
中科院分区：
文献类型：
--
作者：
Ozverdi, Arzu;Erdem, Mehmet
在这项研究中，研究了通过吸附到黄铁矿和合成硫化铁 (SIS) 上从水溶液中去除 Cu2+、Cd2+ 和 Pb2+，研究了 pH、接触时间、吸附剂剂量、初始金属浓度和温度的函数关系。已经确定金属离子在两种吸附剂上的吸附均依赖于pH值并且吸附容量随着温度的升高而增加。控制金属去除过程的机制被确定为由于 H2S 在高 pH（3-6 范围内）下的生成和吸附而在低 pH（< 3）下发生化学沉淀。金属吸附产率也随着吸附剂用量和接触时间的增加而增加，并达到两种吸附剂的平衡。两种吸附剂对Cu2+、Cd2+和Pb2+的吸附容量依次递减：Pb2+ > Cu2+ > Cd2+。除镉外，固体吸附残渣中的铜和铅在酸性介质中只有很少部分被解吸。 (c) 2006 Elsevier B.V. 保留所有权利。
In this study, removal of Cu2+, Cd2+ and Pb2+, from aqueous solutions by adsorption onto pyrite and synthetic iron sulphide (SIS) was investigated as a function of pH, contact time, adsorbent dosage, initial metal concentration and temperature. It has been determined that the adsorption of metal ions onto both adsorbents is pH dependent and the adsorption capacities increase with the increasing temperature. The mechanisms governing the metal removal processes were determined as chemical precipitation at low pH (< 3) due to H2S generation and adsorption at high pH (in the range of 3-6). The metal adsorption yields also increased with the increasing adsorbent dosage and contact time and reached to equilibrium for both adsorbents. The Cu2+, Cd2+ and Pb2+ adsorption capacities of both adsorbents decrease in the order of Pb2+ > Cu2+ > Cd2+. Except for cadmium, little fraction of copper and lead in the solid adsorption residues was desorbed in acidic media. (c) 2006 Elsevier B.V. All rights reserved.