The Nonferrous Metals Society of China

Transactions of Nonferrous Metals Society of China >

2022 , Vol. 32 >Issue 9: 3149 - 3162

DOI: https://doi.org/10.1016/S1003-6326(22)66010-2

Mining, Minerals Processing and Metallurgical Engineering

Facile fabrication of spherical flower-like Mg(OH)2 and its fast and efficient removal for heavy metal ions

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  • Xiao-yi SHEN1,2, Yan-xiang HUANG1, Hong-mei SHAO3, Yuan WANG1, Qing HAN1, Jian-she CHEN1, Bin-chuan LI1, Yu-chun ZHAI1
1. Key Laboratory for Ecological Metallurgy of Multimetallic Mineral (Ministry of Education), School of Metallurgy, Northeastern University, Shenyang 110819, China;
2. Liaoning Key Laboratory for Metallurgical Sensor and Technology, Northeastern University, Shenyang 110819, China;
3. School of Environmental and Chemical Engineering, Shenyang Ligong University, Shenyang 110159, China

Online published: 2022-09-25

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Abstract

Spherical flower-like Mg(OH)2 was fabricated from MgSO4 effluent and its adsorption performance for heavy metal ions was evaluated. The appropriate fabrication conditions are as follows: Mg2+/NH4OH molar ratio of 1:0.5, temperature of 120 °C and time of 1 h at Mg2+ concentration of 2 mol/L. Spherical flower-like Mg(OH)2 composed of ultra-thin sheets exhibits an excellent adsorption ability for Ni2+, Cu2+, Zn2+, Pb2+, Fe3+ and Co2+, and the adsorption reaches the equilibrium in 6 min. The maximum adsorption capacities of the studied heavy metal ions onto Mg(OH)2 at 20 °C are 58.55, 85.84, 44.94, 485.44, 625.00 and 27.86 mg/g, respectively. The adsorption is well fitted by the Langmuir model, indicating that the adsorption is monolayer. The adsorption kinetics follows the pseudo-second- order model. Chemisorption is the operative mechanism. Spherical flower-like Mg(OH)2 is a qualified candidate for heavy metal ions removal.

Cite this article

Xiao-yiSHEN,Yan-xiangHUANG,Hong-meiSHAO,YuanWANG,QingHAN,Jian-sheCHEN,Bin-chuanLI,Yu-chunZHAI . Facile fabrication of spherical flower-like Mg(OH)2 and its fast and efficient removal for heavy metal ions[J]. Transactions of Nonferrous Metals Society of China, 2022 , 32(9) : 3149 -3162 . DOI: 10.1016/S1003-6326(22)66010-2

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