外加营养源作用下砖红壤中五氯酚还原转化的生物化学作用机制
Reduction transformation and biochemistry mechanisms of PCP in latosol under addition of exogenous nutrients
查看参考文献28篇
文摘
|
采用室内培养实验研究外加乳酸和蒽醌-2,6-磺酸钠等营养源条件下,玄武岩砖红壤中五氯酚的还原转化动力学与微生物群落结构变化。结果表明,玄武岩砖红壤中五氯酚的还原转化一级动力学常数为4.5×10~(-3) d~(-1);添加乳酸或同时添加乳酸和AQDS,五氯酚的还原转化速率显著提高,其一级动力学常数分别为7.3×10~(-3) d~(-1)和14.3×10~(-3) d~(-1)。循环伏安试测结果表明,添加乳酸和AQDS促进了砖红壤中活性亚铁的生成,并显著降低体系的氧化半反应峰电位。末端限制性片段长度多态性分析结果表明,添加五氯酚、乳酸和AQDS显著影响微生物群落结构,土壤微生物多样性显著下降;添加乳酸时,体系中微生物优势种群为梭菌,存在少量的具有铁还原能力的希瓦氏菌,未发现脱氯菌。因此,玄武岩砖红壤中五氯酚的还原转化主要是通过铁还原菌介导生成吸附态Fe(II)引起的活性亚铁还原脱氯机制。 |
其他语种文摘
|
In this study, we investigated the reductive transformation of PCP and soil bacteria community structures in basalt latosol under addition of lactate and AQDS. Results showed that PCP reductive transformation occurred with k value of 4.5×10~(-3) d~(-1) in basalt latosol. The addition of lactate and AQDS led to the enhanced rates of PCP transformation with k value of 7.3×10~(-3) d~(-1) and 14.3 × 10~(-3) d~(-1), respectively. Cyclic voltammetry test results showed that the addition of lactate and AQDS led to the enhanced rates of active Fe(Ⅱ) species generation in basalt latosol and significantly enhance the reduction potential in the system. T-RFLP analysis results showed that the microbial communities were affected by the addition of PCP, lactate and AQDS and the microbial diversity was significantly decreased. Clostridum was the dominant population in the system after the addition of lactate. There were also small amounts of Shewanella which has iron-reducing ability but no dechlorinating bacteria. Therefore, reductive transformation of PCP in basalt latosol occurs though chemical dechlorinating process, which induced by iron-reducing bacteria indirectly. |
来源
|
生态环境学报
,2013,22(2):325-329 【核心库】
|
关键词
|
玄武岩砖红壤
;
五氯酚
;
还原转化
;
微生物群落结构
;
T-RFLP
|
地址
|
1.
中国科学院广州地球化学研究所, 广东省农业环境综合治理重点实验室, 广东, 广州, 510640
2.
广东省生态环境与土壤研究所, 广东省农业环境综合治理重点实验室, 广东, 广州, 510650
|
语种
|
中文 |
文献类型
|
研究性论文 |
ISSN
|
1674-5906 |
学科
|
环境科学基础理论 |
基金
|
国家自然科学基金面上项目
;
广东省自然科学基金研究团队项目
;
广东省自然科学基金
|
文献收藏号
|
CSCD:4796931
|
参考文献 共
28
共2页
|
1.
Hong H C. Residue of pentachlorophenol in fresh water sediments and human breast milk collected from the Pearl River Delta, China.
Environment International,2005,31(5):643-649
|
被引
13
次
|
|
|
|
2.
Rodenburg L A. Evidence for widespread dechlorination of polychlorinated biphenyls in groundwater, landfills, and wastewater collection systems.
Environmental Science Technology,2010,44(19):7534-7540
|
被引
2
次
|
|
|
|
3.
Persson Y. Levels of chlorinated compounds (CPs, PCPPs, PCDEs, PCDFs and PCDDs) in soils at contaminated sawmill sites in Sweden.
Chemosphere,2007,66(2):234-242
|
被引
4
次
|
|
|
|
4.
Ahlborg U G. Chlorinated phenols: occurrence, toxicity, metabolism, and environmental impact.
CRC Critical Reviews in Toxicology,1980,7(1):1-35
|
被引
8
次
|
|
|
|
5.
关卉. 雷州半岛典型区域土壤有机氯农药污染探查研究.
生态环境,2006,15(2):323-326
|
被引
21
次
|
|
|
|
6.
陶亮. 土壤有机氯脱氯转化的界面交互反应.
化学进展,21(4):791-800
|
被引
1
次
|
|
|
|
7.
He J. Photoreaction of aromatic compounds at alpha-FeOOH/H2O interface in the presence of H2O2: evidence for organic-goethite surface complex formation.
Water Research,2005,39(1):119-128
|
被引
11
次
|
|
|
|
8.
Valo R. Microbial transformation of polychlorinated phenoxy phenols.
Journal of General and Applied Microbiology,1986,32(6):505-517
|
被引
1
次
|
|
|
|
9.
Lovley D R. Dissimilatory Fe (Ⅲ) and Mn (Ⅳ) reduction.
Microbiological Reviews,1991,55(2):259
|
被引
92
次
|
|
|
|
10.
Hughes A S. Identification of structural properties associated with polychlorinated biphenyl dechlorination processes.
Environmental Science Technology,2009,44(8):2842-2848
|
被引
2
次
|
|
|
|
11.
Li F B. Reductive transformation of pentachlorophenol on the interface of subtropical soil colloids and water.
Geoderma,2008,148(1):70-78
|
被引
7
次
|
|
|
|
12.
Li F B. Enhancement of the reductive transformation of pentachlorophenol by polycarboxylic acids at the iron oxide-water interface.
Journal of Colloid Interface Science,2008,321(2):332-341
|
被引
16
次
|
|
|
|
13.
李芳柏. 红壤胶体铁氧化物界面有机氯的非生物转化研究进展.
生态环境,2006,15(6):1343-1351
|
被引
18
次
|
|
|
|
14.
徐仁扣. 土壤中氧化铁的有机还原溶解动力学.
热带与亚热带土壤科学,1994,3(2):71-76
|
被引
6
次
|
|
|
|
15.
王旭刚. 五氯酚在土壤胶体界面的还原转化.
环境科学研究,2009,22(4):438-443
|
被引
2
次
|
|
|
|
16.
Fredrickson J K. Environmental processes mediated by iron-reducing bacteria.
Current Opinion in Biotechnology,1996,7(3):287-294
|
被引
11
次
|
|
|
|
17.
刘安世.
广东土壤,1993:105-120
|
被引
1
次
|
|
|
|
18.
Khodadoust A P. Solvent extraction of pentachlorophenol from contaminated soils using water-ethanol mixtures.
Chemosphere,1999,38(11):2681-2693
|
被引
10
次
|
|
|
|
19.
Feng C H. Bio-electron-Fenton process by microbial fuel cell for wastewater treatment.
Environmental Science Technology,2010,44(5):1875-1880
|
被引
23
次
|
|
|
|
20.
Chen M J. Biostimulation of indigenous microbial communities for anaerobic transformation of pentachlorophenol in paddy soils of south china.
Journal of Agricultural and Food Chemistry,2012,60(12):2967-2975
|
被引
4
次
|
|
|
|
|