Removal of phenanthrene and acenaphthene from aqueous solution by enzyme-catalyzed phenol coupling reaction

被引：10

作者：

Chen, Zeyou ^{[1
,2
]}

Li, Hui ^{[2
]}

Gao, Yanzheng ^{[1
]}

Peng, Anping ^{[1
]}

机构：

[1] Nanjing Agr Univ, Coll Resource & Environm Sci, Inst Organ Contaminant Control & Soil Remediat, Nanjing 210095, Jiangsu, Peoples R China

[2] Michigan State Univ, Dept Plant Soil & Microbial Sci, E Lansing, MI 48824 USA

来源：

CHEMICAL ENGINEERING JOURNAL | 2015年 / 265卷

基金：

中国国家自然科学基金;

关键词：

PAHs; Enzyme; Cross-coupling reaction; Phenol; Sorption; POLYCYCLIC AROMATIC-HYDROCARBONS; HORSERADISH-PEROXIDASE; CARBON NANOMATERIALS; ORGANIC POLLUTANTS; HYDROGEN-PEROXIDE; MEDIATED REMOVAL; WATER; RESIDUES; BIODEGRADATION; ADSORPTION;

D O I：

10.1016/j.cej.2014.12.047

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Removal of phenanthrene and acenaphthene from aqueous solution was investigated using phenol coupling reaction catalyzed by horseradish peroxidase (HRP). The results revealed that HRP-catalyzed phenol coupling reaction could effectively reduce the concentration of phenanthrene and acenaphthene in the aqueous solution. The removal of phenanthrene and acenaphthene from solution results from sorption and chemical incorporation in the polyphenols formed by enzyme catalyzed phenol coupling reaction. Among these two removal pathways sorption played a dominant role in the removal of phenanthrene from water, whereas for acenaphthene the incorporation in the formed polyphenols was the predominant pathway. The removal efficiency of PAHs increased with increasing the molar ratio of phenol to PAH up to approximately 50-60, and decreased with increasing the molar ratio. Increasing sorption and incorporation of PAHs in the polyphenols manifested apparent aggregation and precipitation forming larger particles in aqueous solution. These results presented in this study provide a potential strategy for remediation of the sites co-contaminated with phenols and PAHs. (C) 2014 Elsevier B.V. All rights reserved.

引用

页码：27 / 33

页数：7

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