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硫醇功能化磁性活性炭的简便合成及其在去除水溶液中汞（II）的应用

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

作者信息

Chen Kuan, Zhang Zhenzong, Xia Kai, Zhou Xiaoji, Guo Yongfu, Huang Tianyin

机构信息

Center for Separation and Purification Materials & Technologies and Jiangsu Provincial Key Laboratory of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou 215009, China.

出版信息

ACS Omega. 2019 May 15;4(5):8568-8579. doi: 10.1021/acsomega.9b00572. eCollection 2019 May 31.

DOI:10.1021/acsomega.9b00572
PMID:31459947
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC6648564/
Abstract

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 NiFeO-PAC-SH was successfully synthesized with a facile and safe hydrothermal method without any toxic and harmful reaction media. The as-prepared NiFeO-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 NiFeO-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 NiFeO-PAC-SH can be a prominent substitute for conventional activated carbon as an adsorbent.

摘要

为了提高普通活性炭作为废水处理吸附剂的吸附容量、降低处理成本并提高分离效率，采用简便安全的水热法，在无任何有毒有害反应介质的情况下，成功合成了一种新型的巯基改性磁性活性炭吸附剂NiFeO-PAC-SH。所制备的NiFeO-PAC-SH能有效去除水溶液中的汞（II）离子。在pH值为7时，实验测得的最大吸附容量和Langmuir拟合值分别达到298.8和366.3 mg/g，超过了大多数吸附材料。所制备的NiFeO-PAC-SH具有出色的再生性能、显著的水热稳定性和高效的分离效率。动力学、等温线和热力学数据表明，汞（II）离子的吸附是自发的且放热的。离子交换和静电吸引是主要的吸附因素。实验结果表明，NiFeO-PAC-SH作为吸附剂可成为传统活性炭的杰出替代品。

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