Dissolved organic matter and estrogenic potential of landfill leachate |
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Authors: | Lü Fan Zhang Hua Chang Cheng-Hsuan Lee Duu-Jong He Pin-Jing Shao Li-Ming Su Ay |
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Institution: | State Key Laboratory of Pollution Control and Resource Reuse, Tongji University, Shanghai, China. |
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Abstract: | The estrogenic potentials of leachate samples collected at Laogang Sanitary Landfill in Shanghai, China were measured together with the associated dissolved organic matter (DOM) in leachate samples. Over 99% of the DOM in fresh leachate was removed upon 3-7 years of landfill, leaving only DOM with strong fluorescent activity. Anoxic or aerobic treatment of landfill leachate can further degrade DOM of MW<300 Da and transform those with fluorescent activity of MW>10(5) Da to those of 2000-10(5) Da. Neither landfilling nor storage in anoxic pond effectively removed estrogenic potential of leachate. Fractionation test revealed that residual organic matters of MW 3000-14000 Da and of <600 Da with high UV254 contributed most of the estrogenic activities in leachate. Aerobic SBR treatment considerably reduced the estrogenic potential of these organic matters in leachate. |
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