Reductive transformation and dechlorination of chloronitrobenzenes in UASB reactor enhanced with zero-valent iron addition
Reductive transformation and dechlorination of chloronitrobenzenes in UASB reactor enhanced with zero-valent iron addition
复制标题
添加零价铁增强UASB反应器中氯硝基苯的还原转化和脱氯
DOI：
10.1002/jctb.2520
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发表时间：
2011-02
影响因子：
3.4
通讯作者：
Zhu Liang
中科院分区：
文献类型：
--
作者：
Kong Yun;Zang Lili;Xu Xiangyang;Lin Haizhuan;Zhu Liang
背景：零价铁(ZVI)越来越多地应用于污水生物处理，以提高各种污染物的转化能力。本研究的目的是研究ZVI对氯硝基苯(3，4-DClNB和4-ClNB)的厌氧生物转化和脱氯的影响。试验在两个上流式厌氧污泥床反应器中进行，其中一个(R2)投加30g L−-1 ZVI，另一个(R1)作为对照反应器。
结果：在R2反应器中，5个月内成功研制出以FeCO3和FeS为伴生菌的ZVI-AGS厌氧颗粒污泥。ZVI的加入显著提高了3，4-DClNB在高负荷下的转化和脱氯效率，并进一步促进了4-氯苯胺(4-团)的脱氯反应。与在R1反应器中形成的AGS相比，ZVI-AGS中铁及其腐蚀产物与甲烷硫杆菌等厌氧菌共存，3，4-DClNB和4-ClNB的比转化率分别提高了34.0%和64.4%。此外，ZVI-AGS具有比AGS更高的3，4-二氯苯丙胺和4-基团脱氯效率。ZVI对ClNBs的非生物转化、合适的铁腐蚀产物浓度、较低的氧化还原电位和较大的产氢能力是强化UASB反应器中ClNBs转化和脱氯的主要因素。
结论：在UASB反应器中投加ZVI可促进ClNBs的还原转化和脱氯。为工业废水高效厌氧处理工艺的设计和优化提供了可行的方案。版权所有(C)2010化学工业学会
BACKGROUND: Zero-valent iron (ZVI) is increasingly being applied in biological wastewater treatment to enhance the conversion of various contaminants. The objective of this present study was to investigate the effect of ZVI on the anaerobic biotransformation and dechlorination of chloronitrobenzenes (3,4-DClNB and 4-ClNB). Experiments were conducted in two upflow anaerobic sludge blanket (UASB) reactors, one (R2) with 30 g L−1 ZVI added, and the other (R1), serving as control reactor.
RESULTS: ZVI-based anaerobic granular sludge (ZVI-AGS) composed of bacteria associated with precipitated FeCO3 and FeS was successfully developed within 5 months in reactor R2. ZVI addition obviously enhanced 3,4-DClNB transformation and dechlorination efficiencies under high 3,4-DClNB loads, and further promoted dechlorination of 4-chloroaniline (4-ClAn) to aniline. Compared with the AGS formed in R1 reactor, iron and its corrosion products were observed and colonized with anaerobes such as methanothrix in ZVI-AGS, and the specific transformation rates of 3,4-DClNB and 4-ClNB using ZVI-AGS were improved by 34.0% and 64.4%, respectively. Furthermore, ZVI-AGS provided higher 3,4-dichloronailine and 4-ClAn dechlorination efficiency than AGS. Abiotic transformation of ClNBs by ZVI, appropriate concentration of iron corrosion products, lower redox potential and greater hydrogen production were the main factors providing enhanced transformation and dechlorination of ClNBs in the UASB reactor.
CONCLUSION: Addition of ZVI to a UASB reactor enhanced the reductive transformation and dechlorination of ClNBs. It provides a feasible proposal for the design and optimization of a high-rate anaerobic wastewater treatment technique for industrial wastewater. Copyright © 2010 Society of Chemical Industry
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影响因子：
2.7
作者：
H. Cao;Yuping Li;Gui-feng Zhang;Yi Zhang
通讯作者：
H. Cao;Yuping Li;Gui-feng Zhang;Yi Zhang
DOI：
10.1021/es051682z.s001
发表时间：
2006
期刊：
--
影响因子：
--
作者：
X. U E Y U A N Y U, † C H R I S T O P H E R A M R H E-X.-U-E-Y-U-A-N-Y-U,-†-C-H-R-I-S-T-O-P-H-E-R-A-M-R-H-2087974630;K. R. M. A T S U M O T O-K.-R.-M.-A-T-S-U-M-O-T-O-2087954552
通讯作者：
X. U E Y U A N Y U, † C H R I S T O P H E R A M R H E-X.-U-E-Y-U-A-N-Y-U,-†-C-H-R-I-S-T-O-P-H-E-R-A-M-R-H-2087974630;K. R. M. A T S U M O T O-K.-R.-M.-A-T-S-U-M-O-T-O-2087954552
影响因子：
11.4
作者：
Agrawal, A;Tratnyek, PG
通讯作者：
Tratnyek, PG
影响因子：
0.6
作者：
P. Kanekar;P. Dautpure;S. Sarnaik
通讯作者：
P. Kanekar;P. Dautpure;S. Sarnaik
影响因子：
12.8
作者：
J. Ryšavý;T. Yan;P. Novak
通讯作者：
J. Ryšavý;T. Yan;P. Novak