Partitioning of dissolved organic matter-bound mercury between a hydrophobic surface and polysulfide-rubber polymer.
Partitioning of dissolved organic matter-bound mercury between a hydrophobic surface and polysulfide-rubber polymer.
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溶解的有机物结合汞在疏水表面和聚硫橡胶聚合物之间的分配。
DOI：
10.1016/j.watres.2011.08.003
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发表时间：
2011
期刊：
影响因子：
12.8
通讯作者：
Luthy,RichardG
中科院分区：
文献类型：
--
作者：
Kim,Eun-Ah;Luthy,RichardG
本研究探讨了溶解有机物对汞在疏水表面（聚乙烯，PE）和还原性富硫表面（聚硫橡胶，PSR）之间分配的作用。比较吸附研究采用聚乙烯和聚乙烯包覆PSR与dom结合的汞离子的反应。结果表明，当DOM为Suwannee河天然有机物（NOM）、黄腐酸（FA）和腐植酸（HA）时，PSR对水中Hg-DOM的去除效果较好，而PE和PSR-PE对水中1,3-丙二醇结合汞离子的去除效果相同。根据PE/water和PSR-PE/water对汞的分配系数，PE和PSR-PE对Hg-DOM去除效率的差异取决于哪种DOM与汞离子结合。x射线光电子能谱法测得具有相同DOM的PE和PSR-PE上的汞表面浓度相似，表明PE和PSR-PE上的固定化汞暴露于水相的量相当。在此基础上，研究了PSR-PE与Hg-DOM之间固定反应的两种主要途径：1)DOM与DOM之间的疏水相互作用使Hg-DOM吸附在PE上；2)Hg与PSR之间的络合反应使Hg-DOM加成在PSR上。通过质量平衡和水汞、pe结合的Hg-DOM和psr结合的Hg-DOM浓度之间的比例，得出了每种途径的百分比贡献。结果表明，汞离子与溶解的有机物和PSR聚合物都有很强的结合。在与DOM反应后，对预负载的hg - psr - pes进行FT-IR检查证实，与Hg-HA， Hg-FA或Hg-NOM相互作用相比，汞离子与1,3-丙二硫醇之间存在强相互作用。
This study investigated the role of dissolved organic matter on mercury partitioning between a hydrophobic surface (polyethylene, PE) and a reduced sulfur-rich surface (polysulfide rubber, PSR). Comparative sorption studies employed polyethylene and polyethylene coated with PSR for reactions with DOM-bound mercuric ions. These studies revealed that PSR enhanced the Hg-DOM removal from water when DOM was Suwannee River natural organic matter (NOM), fulvic acid (FA), or humic acid (HA), while the same amount of 1,3-propanedithiol-bound mercuric ion was removed by both PE and PSR-PE. The differences for Hg-DOM removal efficiencies between PE and PSR-PE varied depending on which DOM was bound to mercuric ion as suggested by the PE/water and PSR-PE/water partition coefficients for mercury. The surface concentrations of mercury on PE and PSR-PE with the same DOM measured by x-ray photoelectron spectroscopy were similar, which indicated the comparable amounts of immobilized mercury on PE and PSR-PE being exposed to the aqueous phase. With these observations, two major pathways for the immobilization reactions between PSR-PE and Hg-DOM were examined: 1) adsorption of Hg-DOM on PE by hydrophobic interactions between DOM and PE, and 2) addition reaction of Hg-DOM onto PSR by a complexation reaction between Hg and PSR. The percent contribution of each pathway was derived from a mass balance and the ratios among aqueous mercury, PE-bound Hg-DOM, and PSR-bound Hg-DOM concentrations. The results indicate strong binding of mercuric ion with both dissolved organic matter and PSR polymer. The FT-IR examination of Hg-preloaded-PSR-PEs after the reaction with DOM corroborated a strong interaction between mercuric ion and 1,3-propanedithiol compared to Hg-HA, Hg-FA, or Hg-NOM interactions.
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影响因子：
9.9
作者：
A. Pitois;L. Abrahamsen;P. Ivanov;N. Bryan
通讯作者：
A. Pitois;L. Abrahamsen;P. Ivanov;N. Bryan
N2S2 四齿配体的新型金属配合物：合成和光谱研究
DOI：
--
发表时间：
2010
期刊：
影响因子：
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作者：
M. J. Al;H. Al;Reyadh Mahmood Ahmad
通讯作者：
Reyadh Mahmood Ahmad
DOI：
--
发表时间：
2009
期刊：
影响因子：
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作者：
M. Kalaee;M. H. N. Famili;H. Mahdavi
通讯作者：
H. Mahdavi
影响因子：
12.8
作者：
Kim, Eun-Ah;Seyfferth, Angelia L.;Luthy, Richard G.
通讯作者：
Luthy, Richard G.