Humic acid sorption onto a quartz sand surface: A kinetic study and insight into fractionation

Pitois, A.; Abrahamsen, L.; Ivanov, P.; Bryan, Nicholas

doi:10.1016/j.jcis.2008.05.031

Cited by 45 publications

(21 citation statements)

References 34 publications

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“…This consequently results in a small specific surface area. A calculation based on smooth spherical particles with a mean diameter of 250 m and bulk density of 2.65 g/cm 3 produces an estimate of ∼0.01 m 2 /g, which is close to a literature measured value for similarly-sourced sand of 0.03 m 2 /g [44].…”

Section: C7a Adsorption Isotherm On Quartz Sandsupporting

confidence: 81%

Asphaltene adsorption on quartz sand in the presence of pre-adsorbed water

Gonzalez

Taylor

2016

Journal of Colloid and Interface Science

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Section: C7a Adsorption Isotherm On Quartz Sandsupporting

confidence: 81%

Asphaltene adsorption on quartz sand in the presence of pre-adsorbed water

Gonzalez

Taylor

2016

Journal of Colloid and Interface Science

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“…Nevertheless, the stabilization of the reactors to constant temperature and homogeneous porewater flow prior the start of the experiments would allow sorption equilibrium to be established due to the fast sorption kinetics and low adsorption capacity of marine sandy sediments (e.g. Fitzsimons et al 2006;Pitois et al 2008). Furthermore, DOM reaction rates were only quantified after steady state was reached, i.e.…”

Section: Accepted M Manuscriptmentioning

confidence: 99%

Effects of recirculation of seawater enriched in inorganic nitrogen on dissolved organic carbon processing in sandy seepage face sediments

Ibánhez

Rocha

2014

Marine Chemistry

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Please cite this article as: Ibánhez, J. Severino P., Rocha, Carlos, Effects of recirculation of seawater enriched in inorganic nitrogen on dissolved organic carbon processing in sandy seepage face sediments, Marine Chemistry (2014Chemistry ( ), doi: 10.1016Chemistry ( /j.marchem.2014 This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain. suggest that the availability of DIN in permeable seepage faces increases the net production of labile DOC, by enhancing the ability of the benthic microbial community to process refractory organic matter. Hence, we suggest that increasing DIN availability in coastal permeable sediments accelerates benthic organic C processing, promoting the release of more labile DOC to receiving water bodies.

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“…HgCl 2 stock solution in 1 M HCl was added to each solution of dissolved organic matter (DOM) to make 10 ppb (50 nM) Hg solutions. Because Suwannee River NOM, FA, and HA have 0.65 wt%, 0.44 wt% and 0.96 wt% sulfur respectively, according to the elemental analysis results reported by IHSS and Pitois et al (2008), 10 mg L −1 DOM solutions have 1.4–3.0 μM sulfur, which is an excess amount for mercury binding in 50 nM Hg solutions. The pH was adjusted to 7 with 0.01M potassium monophosphate buffer.…”

Section: Methodsmentioning

confidence: 96%

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

Kim

Luthy

2011

Water Research

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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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Humic acid sorption onto a quartz sand surface: A kinetic study and insight into fractionation

Cited by 45 publications

References 34 publications

Asphaltene adsorption on quartz sand in the presence of pre-adsorbed water

Asphaltene adsorption on quartz sand in the presence of pre-adsorbed water

Effects of recirculation of seawater enriched in inorganic nitrogen on dissolved organic carbon processing in sandy seepage face sediments

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

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