pH-Dependent Sorption of Acidic Organic Chemicals to Soil Organic Matter

2009 ◽  
Vol 43 (24) ◽  
pp. 9189-9195 ◽  
Author(s):  
Holger C. Tülp ◽  
Kathrin Fenner ◽  
René P. Schwarzenbach ◽  
Kai-Uwe Goss
Keyword(s):  
Organic Matter ◽  
Soil Organic Matter ◽  
Organic Chemicals ◽  
Ph Dependent

Influence of Organic Chemicals on Water Molecule Bridges in Soil Organic Matter of a Sapric Histosol

2017 ◽  
Vol 121 (12) ◽  
pp. 2367-2376 ◽  
Author(s):  
Pavel Ondruch ◽  
Jiri Kucerik ◽  
Zacharias Steinmetz ◽  
Gabriele E. Schaumann
Keyword(s):  
Organic Matter ◽  
Soil Organic Matter ◽  
Water Molecule ◽  
Organic Chemicals

Adsorption of pesticides by some Australian soils

Soil Research ◽  
1981 ◽  
Vol 19 (1) ◽  
pp. 61 ◽  
Author(s):  
GG Briggs
Keyword(s):  
Aqueous Solution ◽  
Organic Matter ◽  
Soil Organic Matter ◽  
North American ◽  
Water Distribution ◽  
Organic Matter Content ◽  
Matter Content ◽  
Organic Chemicals ◽  
The Relationship

Adsorption of non-ionized organic chemicals from aqueous solution by 17 Australian soils was related to the organic matter content of the soils. The soil organic matter/water distribution (Kom) for each chemical was similar in all soils and could be predicted from the octanol/water distribution (Kow) of the chemical. The relationship between these two distributions, log Kom = 0.52log Kow, + 0.69, is similar to that reported for European and North American soils.

SOME CATION-EXCHANGE PROPERTIES OF SOILS CONTAINING FREE OXIDES

1964 ◽  
Vol 44 (2) ◽  
pp. 203-211 ◽  
Author(s):  
J. S. Clark
Keyword(s):  
Organic Matter ◽  
Soil Organic Matter ◽  
New Brunswick ◽  
Cation Exchange ◽  
Iron Oxides ◽  
Extraction Procedure ◽  
Salt Solutions ◽  
Dependent Component ◽  
Ph Dependent ◽  
Exchange Properties

Low C.E.C. values were obtained for the B horizon of a Concretionary Brown soil from British Columbia and a Podzol from New Brunswick, when CaCl2 was used to saturate the cation-exchange complex. Higher CE.C.'s were obtained if Ca(OAc)2 + CaCl2 was used and this showed that the soils had a large pH-dependent component of the C.E.C. Both soils had a high proportion of pH-dependent charge after the destruction of the soil organic matter. Extraction of free iron oxides increased the C.E.C. of the inorganic exchange fractions and eliminated or decreased the pH-dependent component of the C.E.C. Relatively large amounts of iron and aluminum were removed from the soils by the free oxide extraction procedure. These results suggest that the fixation of aluminum and iron was responsible for the low permanent charge values obtained for the soils. The precipitation of the fixed Al and Fe as Al(OH)3 and Fe(OH)3 when the soils were treated with base or extracted with buffered salt solutions released exchange sites and gave an effect equivalent to the release of exchangeable H so that the soils had a large pH-dependent component of the C.E.C.

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