title: [The remove characteristics of dissolved organic matter in landfill leachate during the treatment process].
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 x 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.
authors.affiliation: School of Environment, Beijing Normal University, Beijing 100875, China. hexs82@126.com
authors.forename: Xiao-Song
authors.initials: XS
authors.lastname: He
authors.forename: Jing
authors.initials: J
authors.lastname: Yu
authors.forename: Bei-Dou
authors.initials: BD
authors.lastname: Xi
authors.forename: Yong-Hai
authors.initials: YH
authors.lastname: Jiang
authors.forename: Jin-Bao
authors.initials: JB
authors.lastname: Zhang
authors.forename: Dan
authors.initials: D
authors.lastname: Li
authors.forename: Hong-Wei
authors.initials: HW
authors.lastname: Pan
authors.forename: Hong-Liang
authors.initials: HL
authors.lastname: Liu