| 光谱学与光谱分析 |
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| The Remove Characteristics of Dissolved Organic Matter in Landfill Leachate During the Treatment Process |
| HE Xiao-song1, 2, YU Jing3, XI Bei-dou2*, JIANG Yong-hai2, ZHANG Jin-bao2, LI Dan2, PAN Hong-wei2, LIU Hong-liang2 |
1. School of Environment, Beijing Normal University, Beijing 100875, China
2. Laboratory of Water Environmental System Engineering, Chinese Research Academy of Environmental Science, Beijing 100012, China
3. State Key Laboratory of Geological Hazard Prevention and Geological Environment Protection, Chengdu University of Technology, Chengdu 610059, China |
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Abstract In order to investigate remove characteristics of dissolved organic matter in landfill leachate, leachates were sampled during the process (i.e., adjusting tank, anaerobic zone, oxidation ditch and MBR processing). Dissolved organic matter was extracted and its content and structure were characterized by fluorescence excitation-emission matrix spectra, UV-Vis specrtra and FTIR spectra. The results showed that an amount of 377.6 mg·L-1 dissolved organic carbon (DOC) was removed during the whole treatment process, and the total removal rate was up to 78.34%. The 25.56% of DOC in the adjusting tank was removed during the anaerobic zone, 41.58% of DOC in anaerobic effluent was removed during the oxidation ditch, while 50.19% of DOC in the oxidation ditch effluent decreased in the MBR process. The anaerobic process increased the content of unsaturated compound and polysaccharides in leachate DOM, which improved the leachate biochemical characteristics. The unsaturated compound and polysaccharides were removed effectively during being in oxidation ditch. Protein-like and humic-like fluorescence peaks were observed in the adjusting tank and anaerobic zone, while humic-like fluorescence peaks were just presented in the oxidation ditch and MBR processing. Protein-like and fulvic-like substances were biodegraded in the adjusting tank and anaerobic zone, while humic-like materials were removed in the MBR process.
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Received: 2012-04-06
Accepted: 2012-07-11
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Corresponding Authors:
XI Bei-dou
E-mail: xibeidou@163.net
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