期刊
CHEMICAL ENGINEERING JOURNAL
卷 339, 期 -, 页码 85-96出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2018.01.132
关键词
Waste rock wool; Zero-valent iron nanoparticles; Cr(VI); Removal; Reduction
资金
- National Natural Science Foundation of China [21407151]
- Youth Innovation Promotion Association of Chinese Academy of Sciences [2015385]
- Key Program of Chinese Academy of Sciences [KSZD-EW-Z-022-05]
- Science and Technology Service Programs of Chinese Academy of Sciences [KFJ-STS-ZDTP-002, KFJ-SW-STS-143]
A novel nanocomposite, named as ARWZ, was fabricated using zero-valent iron (ZVI) nanoparticles supported by acid-modified waste rock wool (ARW). ARW displayed a porous rod-like structure and could load plenty of ZVI nanoparticles. Meanwhile, ARW could effectively inhibit the aggregation and oxidation of ZVI nanoparticles because of steric-hindrance effect. ARWZ exhibited a large specific surface area and high removal capacity (197.69 mg/g) in 30 min for hexavalent chromium (Cr(VI)) from water and soil through adsorption and reduction, and the resulting ARWZ-Cr could be easily collected under a magnetic field because of the superior magnetic property. Importantly, when ARWZ was loaded in filter cotton with a micro/nano networks structure, the resulting system could be conveniently used as an excellent filter layer to control the migration of Cr(VI). This work provides a low cost and promising approach to remove Cr(VI), which also promotes the reuse of waste rock wool.
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