Interaction of Soluble Phosphate with Aluminum Hydroxide in Lakes.

摘要

Criteria were defined for predicting the short and long term potential effectiveness of aluminum hydroxide treatment for reversing lake eutrophication by reducing the phosphorus status of the lake photic zone to levels limiting algal productivity. The basic approach was an examination of the interactions of added aluminum with various phosphorus compartments in the lake as related to the direct removal of dissolved inorganic phosphorus in the photic zone from other forms of phosphorus and other zones of the lake. Aspects of aluminum treatment examined experimentally were the ability of an aluminum hydroxide floc to (1) remove dissolved inorganic phosphorus and other forms of phosphorus from water, (2) maintain its inorganic phosphorus-sorptive capacity upon aging in different lake environments,and (3) retard movement of inorganic phosphorus from anaerobic sediments to the overlying water. These aspects were examined individually and then in an integrated fashion in sediment-water columns.