Comparative study on the reactivity of Fe/Cu bimetallic particles and zero valent iron (ZVI) under different conditions of N2, air or without aeration

被引：126

作者：

Xiong, Zhaokun ^{[1
]}

Lai, Bo ^{[1
]}

Yang, Ping ^{[1
]}

Zhou, Yuexi ^{[2
]}

Wang, Juling ^{[2
]}

Fang, Shuping ^{[3
]}

机构：

[1] Sichuan Univ, Sch Architecture & Environm, Dept Environm Sci & Engn, Chengdu 610065, Peoples R China

[2] Chinese Res Inst Environm Sci, Res Ctr Water Pollut Control Technol, Being 100012, Peoples R China

[3] Chengdu Tianfu New Area Construct Investment Co L, Chengdu 610094, Peoples R China

来源：

JOURNAL OF HAZARDOUS MATERIALS | 2015年 / 297卷

基金：

中国国家自然科学基金; 中国博士后科学基金;

关键词：

Fe/Cu bimetallic particles; Zero valent iron (ZVI); Aeration condition; p-Nitrophenol (PNP); AQUEOUS-SOLUTION; WASTE-WATER; REDUCTIVE DEGRADATION; DISSOLVED-OXYGEN; GRANULAR IRON; P-NITROPHENOL; AZO DYES; REMOVAL; DECOLORIZATION; NITROBENZENE;

D O I：

10.1016/j.jhazmat.2015.05.006

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

In order to further compare the degradation capacity of Fe-0 and Fe/Cu bimetallic system under different aeration conditions, the mineralization of PNP under different aeration conditions has been investigated thoroughly. The results show that the removal of PNP by Fe-0 or Fe/Cu system followed the pseudo-first-order reaction kinetics. Under the optimal conditions, the COD removal efficiencies obtained through Fe-0 or Fe/Cu system under different aeration conditions followed the trend that Fe/Cu (air) > Fe/Cu (N2: 0-30 min, air: 30-120 min) > control-Fe (air) > Fe/Cu (without aeration) > Fe/Cu (N2) > control-Fe (N2). It revealed that dissolved oxygen (DO) could improve the mineralization of PNP, and Cu could enhance the reactivity of Fe-0. In addition, the degradation of PNP was further analyzed by using UV-vis, FTIR and GC/MS, and the results suggest that Fe/Cu bimetallic system with air aeration could completely break the benzene ring and -NO2 structure of PNP and could generate the nontoxic and biodegradable intermediate products. Meanwhile, most of these intermediate products were further mineralized into CO2 and H2O, which brought about a high COD removal efficiency (83.8%). Therefore, Fe/Cu bimetallic system with air aeration would be a promising process for toxic refractory industry wastewater. (C) 2015 Elsevier B.V. All rights reserved.

引用

页码：261 / 268

页数：8

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