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http://dx.doi.org/10.15681/KSWE.2014.30.2.206

Selection of Chemicals for the Dissolved Phosphorus Control by Variations of Alkalinity and Hardness  

Kim, Sungok (Department of Environmental Engineering, Chungbuk National University)
Kim, Hag Seong (Department of Environmental Engineering, Chungbuk National University)
Publication Information
Journal of Korean Society on Water Environment / v.30, no.2, 2014 , pp. 206-211 More about this Journal
Abstract
This study was done to find chemicals adequate to control alkalinity and hardness in order to reduce dissolved phosphorus in water bodies like rivers and lakes. Five chemicals were selected for the study: calcite, lime, dolomite, magnesite, and gypsum. Data were obtained from the calculations with MINTEQ model as a function of dosage variations of each chemical. Findings are as follows: Three out of the five chemicals are found to be effective in reducing the dissolved phosphorus, i.e., calcite, lime, and dolomite. Calcite and dolomite are able to lower the phosphorus concentration up to one thousandth fold whereas lime does one hundred thousandths fold. In viewpoint of pH variation, both calcite and dolomite seem to be safe since the pH does not increase over 8.3 even in case of overdose. In the same circumstance, with lime the pH increases beyond 9 which is considered to be the highest pH level for the protection of water ecosystem. Nevertheless it is recommendable to use lime in case where there are some difficulties in water quality control due to algae blooms.
Keywords
Alkalinity; Calcite; Dissolved phosphorus; Dolomite; Hardness; Lime;
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Times Cited By KSCI : 1  (Citation Analysis)
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