Simultaneous adsorption and degradation of triclosan by Ginkgo biloba L. stabilized Fe/Co bimetallic nanoparticles

被引：40

作者：

Gao, Jing-Feng ^{[1
]}

Wu, Zhi-Long ^{[1
]}

Duan, Wan-Jun ^{[1
]}

Zhang, Wen-Zhi ^{[1
]}

机构：

[1] Beijing Univ Technol, Natl Engn Lab Adv Municipal Wastewater Treatment, Beijing 100124, Peoples R China

来源：

SCIENCE OF THE TOTAL ENVIRONMENT | 2019年 / 662卷

基金：

中国国家自然科学基金;

关键词：

Triclosan; Ginkgo biloba L; Fe/Co bimetallic; Adsorption; Degradation; ZERO-VALENT IRON; POLYBROMINATED DIPHENYL ETHERS; GREEN SYNTHESIS; DECHLORINATION; PENTACHLOROPHENOL; EXTRACT; ORANGE; DEBROMINATION; ELIMINATION; PARTICLES;

D O I：

10.1016/j.scitotenv.2019.01.194

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Triclosan (TCS), an antimicrobial agent added in many pharmaceutical and personal care products, can cause some environmental problems due to its bioaccumulation, toxicity and potential antibiotic cross-resistance. In this study, Ginkgo biloba L. leaf extract was used as the green stabilizing agent to synthesize Fe/Co bimetallic nanoparticles (G-Fe/Co NPs), which were applied to remove TCS from aqueous solution. G-Fe/Co NPs were characterized by TEM, EDS, SEM, BET, FTIR, XRD and XPS. G. biloba L. leaf extract improved the dispersion and reduced the passivation of NPs. The TCS removal efficiency followed the order of G-Fe/Co NPs > G-Fe NPs > Co NPs > Fe/Co NPs > Fe NPs. G-Fe/Co NPs can be reused at least eight times. The Co leaching under different initial pH values was negligible. The factors affecting the TCS removal were investigated. The results indicated that the removal of TCS followed pseudo-second-order kinetics, and the removal rate constant decreased with increasing the initial pH value and the initial TCS concentration, and decreasing the Co loading of G-Fe/Co NPs and NPs dosage. The mass balance of TCS removal by G-Fe/Co NPs indicated that adsorption was dominant process and TCS degradation was an accumulative process. (C) 2019 Elsevier B.V. All rights reserved.

引用

页码：978 / 989

页数：12

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