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    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

    吴耀国, 曾睿, 惠林, 尹德忠, 2006. 反硝化条件下河岸渗滤过程中苯胺的降解. 地球科学, 31(2): 273-278.
    引用本文: 吴耀国, 曾睿, 惠林, 尹德忠, 2006. 反硝化条件下河岸渗滤过程中苯胺的降解. 地球科学, 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.

    反硝化条件下河岸渗滤过程中苯胺的降解

    基金项目: 

    国家自然科学基金项目 40472127

    西北工业大学“英才计划”项目 2002

    详细信息
      作者简介:

      吴耀国(1967-), 男, 博士, 副教授, 现主要从事水环境科学与工程研究.E-mail: wuygal@pub.xaonline.com

    • 中图分类号: P342

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

    • 摘要: 通过河岸渗滤作用(riverbankfiltration, RBF) 诱发河水的补给, 增大地下水的允许开采量可以满足更多居民生活饮用水需求.受人类活动的影响, 河流等地表水体遭受苯胺污染, 可能通过RBF进入地下水, 以致饮用该地下水存在健康风险.为研究反硝化条件下, 苯胺在RBF中的转化, 采集渭河河床沉积物及沿岸地下水含水层的含水介质, 装置土柱, 进行土柱动态模拟实验.经过153 d的实验研究发现, 利用苯胺对RBF中土著反硝化微生物进行驯化, 大约经过37d菌种完全适应.具有该菌种的RBF系统, 对苯胺具有巨大降解能力, 在NO3——N约为23.0 mg/L的条件下, RBF系统可使40、80甚至400 mg/L浓度的苯胺100%降解, 矿化率分别达97.99%、91.39%与75.30%.反硝化条件下, 苯胺在RBF中的降解仅有少部分经过脱氨作用, 绝大部分与腐殖质以共价键形式形成耦合物, 该耦合物更易为微生物降解, 且降解过程中不产生对研究环境微生物有毒的中间产物, 可实现反硝化条件下RBF中苯胺的连续降解.

       

    • 图  1  实验装置示意图

      1.定水位装置; 2.沉积层柱(长30 cm、内径15 cm); 3.细砂柱(长50 cm、内径10 cm); 4.粗砂柱(长50 cm、内径10 cm); 5.集水瓶

      Fig.  1.  Sketch map of the tester

      图  2  河床沉积物对苯胺的吸附等温线

      Fig.  2.  Isotherm curve for aniline adsorption by the sediments

      图  3  反硝化环境的扶育实验(a)和扶育过程中氨氮浓度(b)

      Fig.  3.  Nitrate (a) and NH4+-N (b) concentrations in leachate and model water during the denitrification condition forming

      图  4  渗出液中苯胺浓度变化(a) 硝态氮与氯离子浓度变化(b)和氨氮浓度变化(c)

      Fig.  4.  Aniline concentrutions (a) and NO3--N and Cl- concentrations (b) and NH4+-N concentration (c) in leachate and model water

      图  5  硝态氮浓度指示土著微生物的适应情况

      Fig.  5.  Nitrate and chlorate concentrations in leachate during the testing process

      图  6  渗出液体积随时间的变化

      Fig.  6.  Leachate volume varying with time

      表  1  实验过程中测定TOC含量

      Table  1.   TOC concentrations in model water and leachate during the testing process

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    • 收稿日期:  2005-07-01
    • 刊出日期:  2006-03-25

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