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The Influence of Anion Mobility on Ionic Retention in Waste Water‐irrigated Soils
Author(s) -
Johnson D. W.,
Breuer D. W.,
Cole D. W.
Publication year - 1979
Publication title -
journal of environmental quality
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.888
H-Index - 171
eISSN - 1537-2537
pISSN - 0047-2425
DOI - 10.2134/jeq1979.00472425000800020023x
Subject(s) - alkalinity , leaching (pedology) , soil water , chemistry , environmental chemistry , leaching model , adsorption , irrigation , wastewater , environmental science , environmental engineering , soil salinity , soil science , agronomy , organic chemistry , biology
The concept of anion mobility as a determinant of soil leaching rate was illustrated in a waste water irrigation study. Anion adsorption appeared to affect the leaching of H 2 PO 4 − and SO 4 2‐ , but not Cl − , which percolated freely through the soil. The mobility of NO 3 − was primarily regulated by nitrification and plant uptake. The most pronounced change in solution chemistry was an alkalinity decrease of approximately 80% as waste water entered the soil due to lowering of pH (7.5 to ca. 6.5), and to gaseous CO 2 loss from solution. This alkalinity decrease accounted for most of the total ionic retention in the soil which ranged from 40–60% of waste water input.