降级(电信)
化学工程
催化作用
吸附
色散(光学)
复合数
环境修复
化学
氯酚
降水
材料科学
污染
复合材料
苯酚
有机化学
生物
电信
气象学
生态学
工程类
物理
光学
计算机科学
作者
Teng Bao,Mekdimu Mezemir Damtie,Ke Wu,Xing Wang,Yong Zhang,Jun Chen,Cheng Xun Deng,Jie Jin,Zhi Yu,Lie Wang,Ray L. Frost
标识
DOI:10.1016/j.clay.2019.04.020
摘要
Clay minerals, as abundant natural resources, are among the most suitable supporting materials for nano metal. In this manuscript, new Fe3O4 nanoparticle/rectorite (Fe3O4/rectorite) catalysts are developed via in-situ precipitation oxidation reaction. Various physicochemical characterizations of Fe3O4/rectorite show that Fe3O4 nanoparticles (nano-Fe3O4) with an average particle diameter of approximately 10–20 nm are effectively loaded on the surface of acid leached rectorite (Al-rectorite) and have low coaggregation and improved dispersion. Moreover, the catalytic activity of Fe3O4/rectorite on degradation of P-chlorophenol by heterogeneous Fenton method is studied. Results of degradation experiments show that Fe3O4/rectorite has higher degradation efficiency of P-chlorophenol than bare nano-Fe3O4. Regeneration studies also show that Fe3O4/rectorite maintains 100% of its maximum P-chlorophenol degradation capacity after seven consecutive cycles. Fe3O4/rectorite can be easily separated by magnetic separation, and thus has good stability and reusability. The degradation mechanism of Fe3O4/rectorite is adsorption coupled with a Fenton-like reaction, which accounts for P-chlorophenol degradation of up to 625 mg/g. This work demonstrates a new composite material for the effective remediation of refractory organic compounds from wastewater.
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