Preparation of flower-like Mg(OH)2 from nickel laterite and its adsorption ability for Cu2+ and Ni2+

被引：0

作者：

Shao H.-M. ^{[1
]}

Cui Y. ^{[1
]}

Zhang W. ^{[1
]}

Xu W.-D. ^{[1
]}

Li X.-T. ^{[1
]}

Shao Z.-C. ^{[1
]}

机构：

[1] School of Environmental and Chemical Engineering, Shenyang Ligong University, Shenyang

来源：

Zhongguo Youse Jinshu Xuebao/Chinese Journal of Nonferrous Metals | 2021年 / 31卷 / 09期

基金：

中国国家自然科学基金;

关键词：

Adsorption; Cu[!sup]2+[!/sup; Flower-like Mg(OH)[!sub]2[!/sub; Ni[!sup]2+[!/sup; Nickel laterite;

D O I：

10.11817/j.ysxb.1004.0609.2021-37877

中图分类号：

学科分类号：

摘要：

Employing waste solution after precipitating nickel from nickel laterite hydrometallurgy (MgSO4 solution containing (NH4)2SO4) using raw material and ammonia water as precipitant, hexagonal flower-like Mg(OH)2 was successfully prepared by hydrothermal process without dispersant, which is composed of many ultra-thin sheets. Flower-like Mg(OH)2 with perfect morphology can be obtained under the conditions of Mg2+ concentration 2.0 mol/L, molar ratio of Mg2+ and NH4OH 1:0.5, hydrothermal temperature 120 ℃, reaction time 2 h. Flower-like Mg(OH)2 exhibits good adsorption ability for Cu2+ and Ni2+. The removal rate of Cu2+ and Ni2+ reach 94.10% and 95.46% in 6 min by adding 200 and 300 mg of flower-like Mg(OH)2, respectively, into 50 mL solution with Cu2+ and Ni2+ concentrations of 200 mg/L, indicating flower-like Mg(OH)2 is a highly effective remover for heavy metal ions. Further studies on adsorption mechanism show that the adsorption characteristic as monolayer was well fitted by the Langmuir model. The adsorption of heavy metal ions was adjusted by the pseudo-second-order kinetic model. © 2021, China Science Publishing & Media Ltd. All right reserved.

引用

页码：2561 / 2572

页数：11

共 22 条

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