标题：Heterogeneous Degradation of Organic Pollutants by Persulfate Activated by CuO-Fe3O4: Mechanism, Stability, and Effects of pH and Bicarbonate Ions作者：Lei, Yang; Chen, Chuh-Shun; Tu, Yao-Jen; Huang, Yao-Hui; Zhang, Hui

来源出版物：ENVIRONMENTAL SCIENCE & TECHNOLOGY 卷：49 期：11 页：6838-6845 DOI：10.1021/acs.est.5b00623 出版年：JUN 2 2015

摘要：Magnetic CuO-Fe3O4 composite was fabricated by a simple hydrothermal method and characterized as a heterogeneous catalyst for phenol degradation. The effects of pH and bicarbonate ions on catalytic activity were extensively evaluated in view of the practical applications. The results indicated that an increase of solution pH and the presence of bicarbonate ions were beneficial for the removal of phenol in the CuO-Fe3O4 coupled with persulfate (PS) process. Almost 100% mineralization of 0.1 mM phenol can be achieved in 120 min by using 0.3 g/L CuO-Fe3O4 and 5.0 mM PS at pH 11.0 or in the presence of 3.0 mM bicarbonate. The positive effect of bicarbonate ion is probably due to the suppression of copper leaching as well as the formation of Cu(III). The reuse of catalyst at pH0 11.0 and 5.6 showed that the catalyst remains a high level of stability at alkaline condition (e.g., pH0 11.0). On the basis of the characterization of catalyst, the results of metal leaching and EPR studies, it is suggested that phenol is mainly destroyed by the surface-adsorbed radicals and Cu(III) resulting from the reaction between PS and Cu(II) on the catalyst. Taking into account the widespread presence of bicarbonate ions in waste streams, the CuO-Fe3O4/PS system may provide some new insights for contaminant removal from wastewater.

入藏号：WOS:000355779100057

文献类型：Article

语种：English

扩展关键词：MAGNETIC NANOPARTICLES; EFFICIENT DEGRADATION; OXIDATIVE-DEGRADATION; HYDROGEN-PEROXIDE; SULFATE RADICALS; VISIBLE-LIGHT; WASTE-WATER; COPPER; CATALYST; PEROXYMONOSULFATE

通讯作者地址：Huang, Yao-Hui; Natl Cheng Kung Univ, Dept Chem Engn, Tainan 701, Taiwan.

电子邮件地址：yhhuang@mail.ncku.edu.tw; eeng@whu.edu.cn

地址：

[Lei, Yang; Zhang, Hui] Wuhan Univ, Dept Environm Engn, Wuhan 430079, Peoples R China.

[Lei, Yang; Chen, Chuh-Shun; Huang, Yao-Hui] Natl Cheng Kung Univ, Dept Chem Engn, Tainan 701, Taiwan.

[Tu, Yao-Jen] Shanghai Normal Univ, Inst Urban Study, Shanghai 200234, Peoples R China.

[Huang, Yao-Hui] Natl Cheng Kung Univ, Sustainable Environm Res Ctr, Tainan 701, Taiwan.

研究方向：Engineering; Environmental Sciences & Ecology

ISSN：0013-936X

eISSN: 1520-5851