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Aerobic denitrifiers coupled with a denitrification agent were applied in the sediment of an urban river for the bioremediation of nitrogen pollution. The results revealed that 14.7% of the total nitrogen in the sediment was removed after 115 days of treatment and the nitrate nitrogen concentration removal rate was enhanced in the overlying water. Compared with the control, the total transferable...
Precipitation and inactivation of phosphorus(P) by the addition of aluminum (AI) is a widely applied sediment restoration measure. Laboratory experiment with sediment from municipal river was conducted to evaluate the effects of poly-aluminum chloride with different adding means. Adding poly-aluminum chloride doesn't remarkably influence pH. At the same time Al3+ concentration is less than 50 ug·L...
The application of nitrate is an accepted procedure to manage eutrophication municipal rivers by controlling the phosphorus release from sediments into overlying water and offering electron acceptor for microorganism metabolism. An in-situ-experiment was carried out to oxidize the sediment by direct calcium nitrate injection. Phosphorus release from sediment injected calcium nitrate was almost stopped...
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