title: The effect of aerobic conditions on the complexation ability between mercury and humic acid from landfill leachate and its implication for the environment.
abstract: Three-dimensional excitation emission matrix (3DEEM) fluorescence spectroscopy was employed to investigate the structure and characteristics of humic acid (HA) from landfills at different stabilization processes. The results show that the HA in anaerobic landfill leachate stabilized more rapidly than that in semi-aerobic landfill leachate. There were strong interactions between HA and Hg, the S content as well as the oxygen-containing ligands of the HA played a key role in the complexation with mercury. The higher complexation capacity (CL) and stability constant (logK) of HA from anaerobic landfill leachate implies that it is important to strengthen the control of mercury transportation in anaerobic landfills during the early stabilization process. The logK and CL of HA from semi-aerobic landfill leachate increased with the landfill time indicate that control of leachate Hg contamination in the latter stage is of great significance in semi-aerobic landfills.
authors.affiliation: State Key Laboratory of Pollution Control and Resource Reuse, Tongji University, Shanghai 200092, China. xlchai@tongji.edu.cn
authors.forename: Xiaoli
authors.initials: X
authors.lastname: Chai
authors.forename: Yongxia
authors.initials: Y
authors.lastname: Hao
authors.forename: Guixiang
authors.initials: G
authors.lastname: Liu
authors.forename: Zhonggen
authors.initials: Z
authors.lastname: Li
authors.forename: Youcai
authors.initials: Y
authors.lastname: Zhao
mesh_terms: D000332:Aerobiosis; D006812:Humic Substances / Q000032:analysis*; D008628:Mercury / Q000737:chemistry*; D013050:Spectrometry, Fluorescence; D064091:Waste Disposal Facilities; D014874:Water Pollutants, Chemical / Q000737:chemistry*
chemical_list: D006812:Humic Substances; D014874:Water Pollutants, Chemical; D008628:Mercury