NDLI: Partitioning of dissolved organic matter-bound mercury between a hydrophobic surface and polysulfide-rubber polymer

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Evaluation of a Laboratory-Scale Bioreactive In Situ Sediment Cap for the Treatment of Organic Contaminants

Partitioning of dissolved organic matter-bound mercury between a hydrophobic surface and polysulfide-rubber polymer

Nitrate removal, communities of denitrifiers and adverse effects in different carbon substrates for use in denitrification beds

CONTINUOUS COMBINED FENTON’S OXIDATION AND BIODEGRADATION FOR THE TREATMENT OF PENTACHLOROPHENOL-CONTAMINATED WATER

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Partitioning of dissolved organic matter-bound mercury between a hydrophobic surface and polysulfide-rubber polymer

Content Provider	PubMed Central
Author	Kim, Eun-ah Luthy, Richard G.
Copyright Year	2011
Abstract	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.
Related Links	http://dx.doi.org/10.1016/j.watres.2011.08.003
Starting Page	5441
File Format	PDF
ISSN	18792448
e-ISSN	18792448
Journal	Water research
Issue Number	17
Volume Number	45
Language	English
Publisher Date	2011-11-01
Access Restriction	Open
Subject Keyword	Research in Higher Education
Content Type	Text
Resource Type	Article
Subject	Ecological Modeling Waste Management and Disposal Pollution Environmental Engineering Water Science and Technology Civil and Structural Engineering

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