Binding effects on humic-mediated photoreaction: intrahumic dechlorination of mirex in water
Article Abstract:
Previous studies have suggested the ability of humic materials to alter the reactivity of sorbed pollutants by causing changes in their photochemistry. In a study of the photodechlorination of the hydrophobic pesticide mirex in humic acid solutions, it was shown that only sorbed mirex undergoes photodechlorination in the solution. This provides strong evidence that sorption of pollutants to humic materials determines pollutant reactivity. A kinetic model demonstrating the effects of sorption to humics on photoreactions is presented.
Publication Name: Environmental Science & Technology
Subject: Science and technology
ISSN: 0013-936X
Year: 1996
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Comment on "thermodynamics of organic chemical partition in soils." (response to Frank C. Spurlock and James W. Biggar, Environmental Science and Technology, vol. 28, p. 989, 1994)
Article Abstract:
A general partition model is the compromise between the linear and nonlinear partition of nonionic solutes in water to soil organic matter. It proposes that there is an inverse relationship between sorption coefficients and solute concentrations. It suggests that relative concentrations of solute decreases by three orders whenever sorption coefficients increase by three-and-a-half levels. It also indicates sorption coefficients are most powerful when solute concentration is at its lowest.
Publication Name: Environmental Science & Technology
Subject: Science and technology
ISSN: 0013-936X
Year: 1995
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Prediction of partition coefficient and toxicity for phenylthio, phenylsulfinyl, and phenylsulfonyl acetates
Article Abstract:
The rates of synthesis of aromatic sulfur-containing compounds were measured by the shake-flask method. Their capacity factors were determined using RP-HPLC with C18 column and methanol-water eluent. Their toxicities to Photobacterium phosphoreum were also determined by calculating their partial molecular connectivity indices.
Publication Name: Environmental Science & Technology
Subject: Science and technology
ISSN: 0013-936X
Year: 1995
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