Selective degradation of estrogens by a robust iron(III) complex bearing a cross-bridged cyclam ligand via iron(V)-oxo species

被引：19

作者：

Chen, Man ^{[1
]}

Yu, Yuqing ^{[1
]}

Tan, Peng ^{[2
]}

Zhou, Xiaofang ^{[1
]}

Chen, Xiangyu ^{[1
]}

Cai, Quanhua ^{[1
]}

Zeng, Raymond Jianxiong ^{[1
]}

Zhou, Shungui ^{[1
]}

机构：

[1] Fujian Agr & Forestry Univ, Coll Resources & Environm, Fujian Prov Key Lab Soil Environm Hlth & Regulat, Fuzhou 350002, Fujian, Peoples R China

[2] Power China Water Environm Governance, Shenzhen 518102, Peoples R China

来源：

CHEMICAL ENGINEERING JOURNAL | 2019年 / 378卷

基金：

中国国家自然科学基金;

关键词：

Estrogens contamination; Selective degradation; Cyclam complex; Iron-oxo species; Micropollutants; ZERO-VALENT IRON; BISPHENOL-A; OXIDATIVE-DEGRADATION; CATALYTIC-OXIDATION; WATER; REMOVAL; FABRICATION; KINETICS; ACID;

D O I：

10.1016/j.cej.2019.122223

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Selective degradation by enzyme-like iron complex is a potential way to remove the micropollutant estrogens in wastewater. However, the poor stability of complex always limits its applications. Herein, a robust iron complex bearing a cross-bridge cyclam ligand, cis-[Fe(cbc)Cl-2](+) (Fe(L1), cbc = 4,11-dimethyl-1,4,8,11-tetraazabicyclo [6.6.2]hexadecane), is effective to catalyze selective degradation of estrogens. This complex was able to remove higher than 90% of 17 beta-estradiol in three cyclic experiments, showing better stability than the reported iron complexes. No hydroxyl or superoxide radicals was detected and the high valent iron(V)-oxo species formation was observed by electron paramagnetic resonance spectroscopy, proving the degradation of estrogens by Fe(L1)/H2O2 is a non-radical control process. The estrogenic activity of substrate was greatly reduced by approximately 95% after Fe(L1)/H2O2 treatment. This work provides insights to the removal of micropollutants in complicate environment and helps widen the application of homogeneous catalysts in environment remediation.

引用

页数：8

共 54 条

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