The Solubility of Particulate Phosphorus in the Effluent from Alum Treatment of Wastewater and Phosphorus Solutions.

摘要

The effluent from alum treated wastewater streams and the decanted supernatant from alum precipitated phosphorus solutions contain a particulate fraction that is made up of aluminum and phosphorus. These naturally suspended complexes were diluted into pH,temperature,and ionic strength controlled receiving waters. In all cases,filterable reactive phosphorus in the receiving water reached a plateau concentration within 24hours. Diluted effluent from the wastewater stream solubilized less than 10microgram/l filterable reactive phosphorus between pH 6.0and 7.2. Diluted supernatant from alum-precipitated solutions solubilized greater than 10microgram/l at all pH values. Filterable reactive aluminum concentration was measured in certain experiments,and pK(sp)'s calculated for ALPO4and AL(OH)3. Effects of other parameters on the solubility of aluminum-phosphorus complexes are reported.