反硝化条件下河岸渗滤过程中苯胺的降解

吴耀国; 曾睿; 惠林; 尹德忠

Volume 31 Issue 2

Mar. 2006

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WU Yao-guo, CENG Rui, HUI Lin, YIN De-zhong, 2006. Bio-translation of Aniline in Riverbank Filtration Process under Denitrification Conditions. Earth Science, 31(2): 273-278.

Citation:

WU Yao-guo, CENG Rui, HUI Lin, YIN De-zhong, 2006. Bio-translation of Aniline in Riverbank Filtration Process under Denitrification Conditions. Earth Science, 31(2): 273-278.

WU Yao-guo, CENG Rui, HUI Lin, YIN De-zhong, 2006. Bio-translation of Aniline in Riverbank Filtration Process under Denitrification Conditions. Earth Science, 31(2): 273-278.

Citation:

WU Yao-guo, CENG Rui, HUI Lin, YIN De-zhong, 2006. Bio-translation of Aniline in Riverbank Filtration Process under Denitrification Conditions. Earth Science, 31(2): 273-278.

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Bio-translation of Aniline in Riverbank Filtration Process under Denitrification Conditions

Department of Applied Chemistry, Northwestern Polytechnical University, Xi'an 710072, China

Received Date: 2005-07-01
Publish Date: 2006-03-25

Abstract

Abstract

Aniline can enter the environment from many industries, and has been detected in surface water including river water. For many cities in north China such as Xi'an, Lanzhou and Harbin, the drinking water is produced from groundwater recharged by river water through riverbank filtration (RBF). Aniline is a refractory organic pollutant and harmful to humans. So its degradation and mechanism have received much attention. In this paper, soil columns containing sediment and aquifer media were collected from the Weihe riverbed and its bank, and were used to research the characteristics of aniline degradation in the riverbank filtration process under denitrification conditions. The results indicate that all aniline could be degraded by habituated indigenous microorganisms, and even mostly mineralized under denitrification conditions, but the degradation had a long lag period. A minority of aniline degradation must involve deamination, while the majority undergoes covalent binding with humic substances to form complexes. The complexes are degraded easily and even mineralized. During the degradation, no intermediates were harmful to denitrifiers. Therefore, under denitrification conditions, aniline has the potential to biodegrade in RBF and the potential lasts for long time, and this has not been monitored in the groundwater along the polluted river. During the 153 d testing process, the nitrate-nitrogen concentration was about 23.0 mg/L, and the aniline concentration was 40, 80 and 400 mg/L at 0-74 d, 75-105 d and 106-153 d respectively in infiltrating water. Indigenous microorganisms pass a lag period of 37 d, and grow on aniline as the source of carbon in the RBF under denitrification conditions. Aniline concentration in leachate is lower than the detected limits, so its removal rate was 100%. TOC removal rates were 97.99%, 91.39% and 75.30% for 40, 80 and 400 mg/L aniline concentrations respectively, based on TOC monitored infiltrating water and leachate.
- denitrification condition,
- aniline,
- riverbank filtration,
- anaerobic bio-translation.

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References(29)

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