The effect of aerobic conditions on the complexation ability between mercury and humic acid from landfill leachate and its implication for the environment.
The effect of aerobic conditions on the complexation ability between mercury and humic acid from landfill leachate and its implication for the environment.
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DOI：
10.1016/j.chemosphere.2013.02.020
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发表时间：
2013-07
期刊：
影响因子：
8.8
通讯作者：
Xiaoli Chai;Yongxia Hao;Gui-ping Liu;Zhonggen Li;Youcai Zhao
中科院分区：
文献类型：
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作者：
Xiaoli Chai;Yongxia Hao;Gui-ping Liu;Zhonggen Li;Youcai Zhao
利用三维激发发射矩阵(3DEEM)荧光光谱技术研究了垃圾填埋场不同稳定化过程中腐植酸(HA)的结构和特性。结果表明，厌氧垃圾渗滤液中的HA比准好氧垃圾渗滤液中的HA稳定得更快。HA与汞之间存在较强的相互作用，HA的S含量和含氧配体在与汞的络合过程中起着关键作用。厌氧垃圾渗滤液中HA具有较高的络合容量(CL)和稳定常数(LogK)，说明在厌氧垃圾渗滤液稳定化初期加强对汞迁移的控制是非常重要的。准好氧垃圾渗滤液的logK和CLof HA随填埋时间的延长而增加，说明准好氧垃圾填埋场后期渗滤液汞污染的控制具有重要意义。
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 CLof 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.