摘要
Effects of pH,temperature,and oxygen on the production and release of phosphine in eutrophic lake sedi-ments were investigated under laboratory tests.Results indi-cated that the elimination of matrix-bound phosphine was accelerated under initial pH 1 or 12.Phosphine levels could reach maximum under initial pH 10.The contents of phos-phine increased with the addition of alkali under pH 4-12.The rates of phosphine production and release from lake sed-iments varied with temperature.20°C was the most favorable temperature for the production of matrix-bound phosphine.Oxygen showed little effect on matrix-bound phosphine.Matrix-bound phosphine concentrations in lake sediments were concluded to be dependent on a balance of natural generation and depletion processes.
基金
This work was supported by the Science&Technol-ogy Key Project of the Ministry of Education(Grant No.03079)
the National Natural Science Foundation of China(Grant No.20177007)
the National Key Basic Research and Development(973)Program of China(Grant No.2002CB412304).
