Issue 100, 2016, Issue in Progress
From the journal:

RSC Advances

Organically-modified magnesium silicate nanocomposites for high-performance heavy metal removal†

Yichang Yu,a   Zhangjun Hu,*ab   Zhenyong Chen,a   Jiaxiang Yang,*c   Hongwen Gaoa  and  Zhiwen Chenb  

* Corresponding authors

a State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, PR China
E-mail: huzjun@tongji.edu.cn

b School of Environmental and Chemical Engineering, Shanghai University, Shanghai, PR China

c Key Laboratory of Functional Inorganic Materials of Anhui Province, Anhui University, Hefei 230039, PR China
E-mail: jxyang@ahu.edu.cn

Abstract

A disulfide-grafted polyethyleneimine (PES)@Mg2SiO4 composite was synthesized, characterized, and used successfully to remove heavy metals from wastewater. It was grafted with a huge number of dithiocarbamate moieties as sites for specific adsorption. By comparative studies, it was found that the morphology, structure and properties were influenced by the trapped organic components in the composites. PES@Mg2SiO4 exhibits a larger specific surface area and better adsorption activity compared with Mg2SiO4, polyethyleneimine (PEI)@Mg2SiO4 and PEI@Mg2SiO4–CS2. The adsorption behaviors of the obtained composites were investigated for the recovery of Hg2+, Pb2+ and Cd2+. PES@Mg2SiO4 shows the highest adsorption capacities of 714 mg g−1 for Hg2+, 400 mg g−1 for Pb2+ and 323 mg g−1 for Cd2+, which fits the Langmuir isotherm model. Besides this, it also exhibits excellent adsorption capacity for Cu2+, Bi3+ and metal complexes. Its application in petrochemical wastewater demonstrates its enormous potential for heavy metal wastewater treatment.

Graphical abstract: Organically-modified magnesium silicate nanocomposites for high-performance heavy metal removal

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Article information

DOI
https://doi.org/10.1039/C6RA20181D
Article type
Paper
Submitted
10 Aug 2016
Accepted
29 Sep 2016
First published
30 Sep 2016

RSC Adv., 2016,6, 97523-97531

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Organically-modified magnesium silicate nanocomposites for high-performance heavy metal removal

Y. Yu, Z. Hu, Z. Chen, J. Yang, H. Gao and Z. Chen, RSC Adv., 2016, 6, 97523 DOI: 10.1039/C6RA20181D

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