Evaluation of Several Commercially Available Cationic Polymer Flocculants for Phosphate Sorption in Water
Journal Article - Open Access
AIR FORCE ACADEMY COLORADO SPRINGS CO COLORADO SPRINGS United States
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Although inorganic phosphate is an essential plant nutrient, elevated levels in surface waters lead to adverse effects in the environment. These effects are attributed to runoff from rain or irrigation events that may cause the sorbed phosphate to be transported from the application sites and to move into neighboring watersheds. Increased phosphate concentration in watersheds may lead to a variety of environmental problems including increased algal blooms, bacterial contamination, and in some cases eutrophication. To overcome these effects, polymer flocculants have been shown to reduce the phosphate concentration in water by removing suspended solids and thereby removing the phosphate sorbed to the solids. The purpose of this study is to determine the amount, if any, of phosphate removed by several commercial polymers. The polymers chosen include the polyacrylamides Magnifloc 494C, Magnifloc 985N and Poly diallyldimethyl ammonium chloride Poly DADMAC. Using these polymers, it is discovered that the positive charge density of the polymers affects the amount of phosphate removed from solution with Poly DADMAC having 100 positive charge density removing 40 of the phosphate from a solution containing 10 ppm phosphate.
- Agricultural Chemistry
- Water Pollution and Control