The effect of aerobic conditions on the complexation ability between mercury and humic acid from landfill leachate and its implication for the environment

被引：17

作者：

Chai Xiaoli ^{[1
]}

Hao Yongxia ^{[1
]}

Liu Guixiang ^{[1
]}

Li Zhonggen ^{[2
]}

Zhao Youcai ^{[1
]}

机构：

[1] Tongji Univ, State Key Lab Pollut Control & Resource Reuse, Shanghai 200092, Peoples R China

[2] Chinese Acad Sci, State Key Lab Environm Geochem, Inst Geochem, Guiyang 550002, Peoples R China

来源：

CHEMOSPHERE | 2013年 / 92卷 / 04期

基金：

中国国家自然科学基金;

关键词：

Aerobic condition; Mercury; Humic acid; Landfill leachate; DISSOLVED ORGANIC-MATTER; FLUORESCENCE EXCITATION; REGIONAL-INTEGRATION; REDUCED SULFUR; SUBSTANCES; BINDING; DOM; CONSTANTS; EMISSIONS; SPECTRA;

D O I：

10.1016/j.chemosphere.2013.02.020

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

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 (C-L) and stability constant (log K) 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 log K and C-L 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. (c) 2013 Elsevier Ltd. All rights reserved.

引用

页码：458 / 463

页数：6

共 34 条

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