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Changes in Spectral Characteristics and Copper (II)-Binding of Dissolved Organic Matter in Leachate from Different Water-Treatment Processes

  • Xiang Li
  • Xiao-song He
  • Xu-jing GuoEmail author
  • Lu Chen
  • Ni Guo
Article

Abstract

The aim of the present study was to investigate the fluorescence properties of dissolved organic matter (DOM) from four leachate samples, which were disposed by regulating tank (RTK), anaerobic treatment (ATT), oxidation ditch (ODH), and membrane bioreactor and to assess their binding capacities and stability constants by Cu(II). The results showed that five fluorescent peaks, including three humic-like peaks (peaks A, C, and E) and two protein-like peaks (peaks B and D), were identified. Most fluorescent components can be degraded after ODH. Fluorescence-quenching titration showed that the modified Stern–Volmer model can be used to fit the quenching data and calculate conditional stability constants (log K) and the % of fluorophores (f %) between DOM and Cu(II). DOM–Cu(II) complexes had relatively high log K values in the RTK and ATT disposals. After the ODH-treatment process, log K values showed a marked decrease. The f % values of protein-like materials were evidently greater than those of humic-like substances. The results showed the impact of the water treatment on the metal-binding ability of various fractions.

Keywords

Dissolve Organic Matter Dissolve Organic Matter Landfill Leachate Dissolve Organic Matter Concentration Oxidation Ditch 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Notes

Acknowledgments

This work was financially supported by the National Public Benefit (Environmental) Research Foundation of China (Grant No. 201309003), the 12th Five-Year National Science and Technology Support Plan (Grant No. 2011BAD15B04), and the Science and Technology Development Plan of Jilin Province (Grant No. 20110263).

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Copyright information

© Springer Science+Business Media New York 2013

Authors and Affiliations

  • Xiang Li
    • 1
  • Xiao-song He
    • 1
  • Xu-jing Guo
    • 2
    Email author
  • Lu Chen
    • 2
  • Ni Guo
    • 3
  1. 1.State Key Laboratory of Environmental Criteria and Risk AssessmentChinese Research Academy of Environmental ScienceBeijingChina
  2. 2.Key Laboratory of Development and Application of Rural Renewable EnergyBiogas Scientific Research Institute of the Ministry of AgricultureChengduChina
  3. 3.School of Hydraulic and Hydro-Electric EngineeringSichuan UniversityChengduChina

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