| Soil-Column Test on Aniline Degradation in Riverbank Filtration under Denitrification Conditions |
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| 作者姓名： | WuYaoguo WangHui ZhangWencun SunWeijian |
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| 作者单位： | Wu Yaoguo Wang Hui Zhang Wencun Sun Weijian Department of Applied Chemistry，Northwestern Polytechnical University，Xi'an 710072，China |
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| 摘 要： | INTRODUCTION Riverbankfiltration(RBF)isaprocessbywhich surfacewaterissubjectedtogroundpassagebeforebe ingcollectedandusedasadrinkingwatersource(His cockandGrischek,2002;Rayetal.,2002;Doussanet al.,1997).Duringinfiltrationandtravelthroughthe riverbedandaquifersediments,surfacewaterissubjec tedtoacombinationofphysical,chemical,andbiologi calprocessesthatcansignificantlyimprovetherawwa terquality(HiscockandGrischek,2002).Thus,RBF hasbeenusedasapretreatedmethodtoimprovedrink ingwate…
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| 关 键 词： | 土壤柱测试 苯胺降解 河岸过滤 脱氮作用 自来水消毒 |
Soil-Column Test on Aniline Degradation in Riverbank Filtration under Denitrification Conditions |
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| WuYaoguo WangHui ZhangWencun SunWeijian.Soil-Column Test on Aniline Degradation in Riverbank Filtration under Denitrification Conditions[J].Journal of China University of Geosciences,2005,16(2):183-188. |
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| Authors: | Wu Yaoguo Wang Hui Zhang Wencun Sun Weijian |
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| Abstract: | Drinking water is at risk from aniline pollution and thus aniline degradation and its mechanism have received much attention. In this paper, a soil column, including sediments and aquifer media, was collected from the Weihe riverbed and its bank, and 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 the habituated indigenous microbes, and even mostly mineralized under denitrification conditions, but with a long lag phase. Some aniline degradation must involve deamination, while the majority undergoes covalent binding with humic substances to form complexes, and the complexes are easily degraded and even mineralized. During the degradation no intermediates were harmful to denitrifiers. Therefore, under denitrifaction conditions, aniline is degraded in RBF, and up to now aniline 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 aniline concentrations were 40, 80 or 400 mg/L at 0-74 d, 75-105 d and 106-153 d respectively in infiltrating water. Indigenous microbes 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 was lower than the detected limits, so its removal rate was 100 %. Total organic carbon (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 in infiltrating water and leachate. |
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| Keywords: | denitrification conditions aniline riverbank filtration anaerobic bio-translation |
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