Title

The Effect of Ammonia on Atrazine Sorption and Transport

Document Type

Book Chapter

Publication Date

1996

Abstract

Ammonia application increased soil solution pH and decreased atrazine sorption to soil. Kf values for atrazine were 5.2 in nonamended soil (pH = 5.7) and 2.9 and 2.2 for ammonia-amended soils at pH 7.8 and pH 8.9, respectively. Atrazine sorption was affected differentially by base treatments of KOH and NaOH compared to NH4OH. These results suggest that factors other than pH modification influenced atrazine sorption characteristics. Incubation of atrazine in NH4OH extracts from soil indicated that hydroxyatrazine (HA) could be formed, however, in the presence of soil, HA was not detected. Partition coefficients for HA at pH values of 5.7, 7.8, and 8.9 were 130, 0.7, and 0.1, respectively. Ammonia application increased the potential of atrazine to leach through soil.

Publication Title

Herbicide Metabolites in Surface Water and Groundwater

Volume

ACS Symposium Series Vol. 630

Issue

Chapter 10

First Page

117

Last Page

124

DOI of Published Version

10.1021/bk-1996-0630.ch010

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