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A Pilot‐Scale Evaluation of Alum Treatments to Reduce Lake Sediment Phosphorus Release
Author(s) -
Young Thomas C.,
Collins Anthony G.,
Armstrong Robert A.
Publication year - 1988
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/jeq1988.00472425001700040025x
Subject(s) - alum , eutrophication , sediment , phosphorus , environmental science , hydrology (agriculture) , environmental engineering , chemistry , environmental chemistry , nutrient , geology , geomorphology , geotechnical engineering , organic chemistry
Presented is a simple mass‐balance approach to evaluating alum inactivation of sediment‐bound phosphorus (P) using continuous‐flow reactors and aerobic sediments from a eutrophic luke (Black Lake, NY). The method permitted tests of treatment effects on the rate and duration of sediment P release, was simple to interpret, statistically reliable, and could be applied to other eutrophic systems. Analyzed as a zero‐order process, sediment P release rate decreased linearly as a function of alum dose, and the maximum dose tested (equivalent to 1.22 g Al m −2 ) halved the zero‐order P release rate for four hydraulic retention periods.