Facile Synthesis of Thiol-Functionalized Magnetic Activated Carbon and Application for the Removal of Mercury(II) from Aqueous Solution

被引:63
作者
Chen, Kuan [1 ]
Zhang, Zhenzong [1 ]
Xia, Kai [1 ]
Zhou, Xiaoji [1 ]
Guo, Yongfu [1 ,2 ]
Huang, Tianyin [1 ]
机构
[1] Suzhou Univ Sci & Technol, Ctr Separat & Purificat Mat & Technol, Suzhou 215009, Peoples R China
[2] Suzhou Univ Sci & Technol, Jiangsu Prov Key Lab Environm Sci & Engn, Suzhou 215009, Peoples R China
基金
中国国家自然科学基金;
关键词
PAMAM DENDRIMERS; WATER ENVIRONMENT; METHYLENE-BLUE; FUEL ETHANOL; WASTE-WATER; ADSORPTION; PERFORMANCE; ADSORBENT; HG(II); NANOPARTICLES;
D O I
10.1021/acsomega.9b00572
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
To improve the adsorption capacity, reduce the disposal cost, and enhance the separation efficiency of common activated carbon as an adsorbent in wastewater treatment, a novel thiol-modified magnetic activated carbon adsorbent of NiFe2O4-PAC-SH was successfully synthesized with a facile and safe hydrothermal method without any toxic and harmful reaction media. The as-prepared NiFe2O4-PAC-SH can effectively remove mercury(II) ions from aqueous solution. The maximal adsorption capacities from the experiment and Langmuir fitting achieve 298.8 and 366.3 mg/g at pH 7, respectively, exceeding most of adsorptive materials. The as-prepared NiFe2O4-PAC-SH has an outstanding regeneration performance, remarkable hydrothermal stability, and efficient separation efficiency. The data of kinetics, isotherms, and thermodynamics show that the adsorption of mercury(II) ions is spontaneous and exothermic. Ion exchange and electrostatic attraction are the main adsorption factors. The experimental results exhibit that the NiFe2O4-PAC-SH can be a prominent substitute for conventional activated carbon as an adsorbent.
引用
收藏
页码:8568 / 8579
页数:12
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