稳定态纳米零价铁-厌氧菌联合处理法降解2,4,6-三氯苯酚.pdf

化工环保
210
ENVIRONMENTAL PROTECTION OF CHEMICAL INDUSTRY
2014年第34卷第3期
稳定态纳米零价铁一厌氧菌联合处理法
降解2,4,6-三氯苯酚
舒亚婕,万金泉2,关泽宇,马邕文2
(1.华南理工大学环境与能源学院,广东广州510006
2.华南理工大学制浆造纸工程国家重点实验室,广东广州510640
摘要」利用SEM、XRD、FTR等手段对稳定态纳米零价铁(NH2-SiO2CNZV)进行表征,并考察NH2-SiO2GNZV1-厌氧菌
体系对対2,4,6-三氯苯酚(2,4,6-TCP)的降解效果。实验结果表明:NH2-SiO2のNZVI具有较强的抗氧化能力及较好的分散
性;当2,4,6-TCP质量浓度50mgL、NH2-SiO2のNZVI加入量1gL、初始pH7.00、反应120h时,2,4,6-TCP的去除率为
34.76%,一级降解速率常数为0.0221,均远大于普通纳米零价铁颗粒;在NH2-SiO2のNZVI-厌氧菌体系中,2,4,6-TCP的去
除率可达82.70%,NH2- Sio,@NZV与厌氧微生物之间表现出明显的协同效竝,能有效缓解2,4,6-TCP对厌氧微生物的抑制作
用,稳定体系pH,提高微生物的降解活性和产甲烷活性
[关键词]」稳定态纳米零价铁;2,4,6-三氯苯酚;表面修饰;厌氧处理
[中图分类号]X78[文献标志码]A[文章编号]1006-1878(2014)03-0210-05
Degradation of 2, 4, 6-trichlorophenol by Combination Process with
Stable Nano-scale Fe and Anaerobic Bacteria
Shu Yaiie', Wan Jinauar
Guan Zeyu, Ma Yongwen
(1. College of Environment and Energy, South China University of Technology, Guangzhou Guangdong 510006, China; 2. State
Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou Guangdong 510640, China
Abstract: The particles of stable nano-scale Fe (NH2-SI02 @NZVI)were characterized by SEM
XRD and FTIR. The degradation effects of 2, 4, 6-trichlorophenol(2, 4, 6-TCP)in the NH -SIO(@NZVI-
anaerobic bacteria system were studied. The experimental results show that: The anti-oxidation capabilit
and dispersity of NH -Sio (@NZ VI are good; When the mass concentration of 2, 4, 6-trichlorophenol is 50
mg/L, the dosage of NH -SIO (@NZ VI is 1g/L, the initial ph is 7.00 and the reaction time is 120 h, the
removal rate of 2, 4, 6-trichlorophenol is 34.76, the speed constant for the first order reaction is 0.0221
which are both much larger than those of normal nano-scale Fe; The removal rate of 2, 4, 6-trichlorophenol
in the NH -Sio, (nzvi-anaerobic bacteria system can reach 82.70%, which indicates that there is a
significant coordination effect between NH -Sio @NZ VI and anaerobic bacteria
Key words: stable nano-scale zero-valent iron; 2, 4, 6-trichlorophenol; surface modification; anaerobic
treatment
近年来,壳核型纳米零价铁(NZVI)颗粒在在原位修复中的使用效果变差。目前表面改性技术
磁性、光吸收及生物应用]等方面展现了极大已被成功用于合成更稳定、高效的NZVI,已有报
的优异性,成为环境污染修复领域研究的热点,道的表雨修饰剂包括羧甲基纤维素、壳聚糖、聚合
如NZVI应用于地下水及土壤中原位修复有机氯代
收稿日期
13-11-21;[修订日期]2014-01-15。
物、造纸及电镀等行业工业废水中去除重金属和氯『作者简介]每亚(199-),、女、湖北省武汉市人、,额士生,
代芳香族等难降解污染物4。而常规NZV1易氧研究方向为污水处理。电话13541000电郎do1990
化,使表面生成致密氧化膜,导致反应活性降低, aliyun,eom。