过硫酸钠氧化硫酸亚铁去除水中磷的实验研究

Experimental Investigation on Removal of Phosphorus in the Water by Ferrous Sulfate Oxidized by Sodium Persulfate

利用过硫酸钠氧化硫酸亚铁,对水中磷的去除进行了研究。结果表明,磷的去除效率随Fe^(2+)、P物质的量之比增大而增大,随Na_2S_2O_8、Fe^(2+)物质的量之比增大而先增大后减小;磷在不同pH条件下去除效率大小顺序为碱性>中性>酸性;SO_4^(2-)对磷去除有促进作用;Cl^-和NO_3^-对磷去除有抑制作用;CO_3^(2-)在低浓度时促进磷的去除,在高浓度时则抑制磷的去除。

The removal of phosphorus in the water was studied by using sodium persulfate to oxidize ferrous sulfate.The results show that the removal efficiency of phosphorus increases with the increase of Fe^2+,P molar ratio.As the increasing of Na2S2O 8,Fe^2+molar ratio,the removal efficiency of phosphorus increases first and then decreases.The sequence of the removal efficiency of phosphorus at different pH is alkaline>neutral>acidic.SO 2-4 promotes the removal efficiency of phosphorus.Cl^-and NO^-3 both inhibit the removal efficiency of phosphorus.The removal efficiency of phosphorus is promoted at low concentration of CO2^-3,but inhibited at high concentration of CO2^-3.