期刊
JOURNAL OF HAZARDOUS MATERIALS
卷 392, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.jhazmat.2020.122288
关键词
Adsorption; Mercury ion; Embed; PSM; One-pot synthesis
资金
- National Key Research and Development program [2018YFD0800300, 2016YFC1400600]
- Natural Science Foundation of China [U1607111]
- Hundred Talent program of CAS [2010-735]
- project for Science and Technology Service of Chinese Academy of Sciences [KFJ-EW-STS-016]
- aided program for Science and Technology Innovative Research Team of Ningbo Municipality [2014B82010]
- Zhejiang Province [LGF19D060001, R5110230]
This research reports a new mercury adsorbent in which Fe3O4 as a core was embedded into the shell of ZIF-90 in a one-pot synthesis and the subsequent post synthesis modification (PSM) of its surface with cysteine covalently, via a Schiff's base reaction. Poly acrylic acid (PAA) was capped on the surface of nanoparticles to prevent agglomeration of the nanoparticles. In addition, - COOH groups of PAA coordinated with Zn2+ of ZIF-90 and this provided the platform for ZIF-90 to grow on the nanoparticles forming the core-shell structure. Based on the strong interactions between the thiol groups on the adsorbent and mercury ions as elucidated by the XPS analysis, the as-synthesized adsorbent showed selectivity for Hg2+. The sorbent exhibited high adsorption capacity of 900 mg g(-1) towards Hg2+ as calculated at pH 4 and the adsorption kinetics followed pseudo-second-order kinetics model better. The Hg2+ loaded adsorbent was easily regenerated and it maintained about 70 % efficiency after the third use. Low-cost, readily available and green materials, facile preparation, efficient removal and the breakthrough in three times recyclability give the novel ZIF-90 based hybrid nanoadsorbent wide prospects in the field of environmental remediation as a good adsorbent for Hg2+ removal in wastewater.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据