Metal Ions Binding to Natural Organic Matter Extracted from Wheat Bran: Application of the Surface Complexation Model

2000 ◽  
Vol 225 (2) ◽  
pp. 329-339 ◽  
Author(s):  
Corinne Ravat ◽  
Fanny Monteil-Rivera ◽  
Jacques Dumonceau
Keyword(s):  
Organic Matter ◽  
Metal Ions ◽  
Natural Organic Matter ◽  
Wheat Bran ◽  
Surface Complexation ◽  
Surface Complexation Model

scholarly journals Modelling lead(II) sorption to ferrihydrite and soil organic matter

2011 ◽  
Vol 8 (5) ◽  
pp. 485 ◽  
Author(s):  
Jon Petter Gustafsson ◽  
Charlotta Tiberg ◽  
Abubaker Edkymish ◽  
Dan Berggren Kleja
Keyword(s):  
Organic Matter ◽  
Soil Organic Matter ◽  
Surface Complexation ◽  
Toxic Metal ◽  
Anthropogenic Sources ◽  
Model Parameters ◽  
Complexation Reaction ◽  
Surface Complexation Model ◽  
Organic Complexation ◽  
Bidentate Complex

Environmental contextLead(II) is a toxic metal pollutant with many anthropogenic sources. We show that lead(II) is bound more strongly to soil surfaces than previously understood. This knowledge may lead to better models for lead(II) dissolution from the soils, which will improve risk assessments for this metal. AbstractLead(II) adsorption to soil organic matter and iron (hydr)oxides is strong, and may control the geochemical behaviour of this metal. Here, we report the adsorption of Pb2+ (i) to 2-line ferrihydrite, and (ii) to a mor layer. The results showed that ferrihydrite has heterogeneous Pb2+ binding. Use of a surface complexation model indicated that ~1 % of the surface sites adsorbed Pb2+ more strongly than the remaining 99 %. Although only one surface complexation reaction was used (a bidentate complex of the composition (≡FeOH)2Pb+), three classes of sites with different affinity for Pb2+ were needed to simulate Pb2+ binding correctly over all Pb/Fe ratios analysed. For the mor layer, Pb2+ sorption was much stronger than current models for organic complexation suggest. The results could be described by the Stockholm Humic Model when the binding heterogeneity was increased, and when it was assumed that 0.2 % of the binding sites were specific for Pb. Use of revised model parameters for nine Vietnamese soils suggest that lead(II) binding was more correctly simulated than before. Thus, underestimation of lead(II) sorption to both (hydr)oxide surfaces and organic matter may explain the failure of previous geochemical modelling attempts for lead(II).

scholarly journals Electrochemical dechlorination of trichloroethylene in the presence of natural organic matter, metal ions and nitrates in a simulated karst media

2017 ◽  
Vol 5 (1) ◽  
pp. 240-245 ◽  
Author(s):  
Noushin Fallahpour ◽  
Xuhui Mao ◽  
Ljiljana Rajic ◽  
Songhu Yuan ◽  
Akram N. Alshawabkeh
Keyword(s):  
Organic Matter ◽  
Metal Ions ◽  
Natural Organic Matter

Effect of environmental factors on the oxidative transformation of cephalosporin antibiotics by manganese dioxides

2019 ◽  
Vol 21 (4) ◽  
pp. 692-700 ◽  
Author(s):  
Ming-Hao Hsu ◽  
Ting-Hao Kuo ◽  
Webber Wei-Po Lai ◽  
Ching-Hua Huang ◽  
Cheng-Chih Hsu ◽  
...  
Keyword(s):  
Organic Matter ◽  
Environmental Factors ◽  
Metal Ions ◽  
Natural Organic Matter ◽  
Oxidative Transformation ◽  
Environment Factors ◽  
Cephalosporin Antibiotics

The δ-MnO2 oxidation of cephalosporin antibiotics can be affected by different environment factors (MnO2 loading, pH, metal ions, natural organic matter and sunlight).

A Mechanistic Exploration of Natural Organic Matter Aggregation and Surface Complexation in Smectite Mesopores

2020 ◽  
Vol 124 (47) ◽  
pp. 9832-9843
Author(s):  
Narasimhan Loganathan ◽  
Brennan O. Ferguson ◽  
Bruce Arey ◽  
Haley E. Argersinger ◽  
Geoffrey M. Bowers
Keyword(s):  
Organic Matter ◽  
Natural Organic Matter ◽  
Surface Complexation

Effects of metal ions on disinfection byproduct formation during chlorination of natural organic matter and surrogates

Chemosphere ◽  
2016 ◽  
Vol 144 ◽  
pp. 1074-1082 ◽  
Author(s):  
Yu Zhao ◽  
Hong-wei Yang ◽  
Shi-ting Liu ◽  
Shun Tang ◽  
Xiao-mao Wang ◽  
...  
Keyword(s):  
Organic Matter ◽  
Metal Ions ◽  
Natural Organic Matter ◽  
Disinfection Byproduct ◽  
Byproduct Formation

Influence of Natural Organic Matter on the Adsorption of Metal Ions onto Clay Minerals

2002 ◽  
Vol 36 (13) ◽  
pp. 2932-2938 ◽  
Author(s):  
D. Schmitt ◽  
H. E. Taylor ◽  
G. R. Aiken ◽  
D. A. Roth ◽  
F. H. Frimmel
Keyword(s):  
Organic Matter ◽  
Metal Ions ◽  
Clay Minerals ◽  
Natural Organic Matter ◽  
Adsorption Of Metal Ions
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