钝化剂对模拟湖水磷钝化效果影响因素研究

Effects of the Deactivator on the Deactivation of P in Simulated Lake Water and the Influencing Factors

为研究野外条件下外在因素对钝化剂钝化效果的影响,以人工配制磷酸盐溶液模拟巢湖湖水为研究对象,研究不同投加量、溶液pH、振荡时间、振荡频率和磷初始浓度5个影响因素对模拟湖水磷钝化效果的影响。结果表明:当其他条件相同时,投加量为0.07g、溶液pH为6~9、钝化剂的振荡时间为45min、振荡频率为中速(180r/min)、磷初始浓度不超过3mg/L时,钝化剂对磷的钝化效果最佳。通过正交实验发现最优水平组合为磷初始浓度不超过3mg/L、振荡频率为中速(180r/min)、投加量为0.06g,由SPSS软件主旨效果检定分析可知:磷初始浓度、振荡频率、投加量对该钝化剂钝化效果影响依次减少。

In order to study the influence of external factors on the passivation effect of passivator under field conditions,the simulated Chaohu Lake water was simulated with phosphate solution prepared artificially.The effects of five influencing factors,such as different dosage,solution pH,oscillation time,oscillation frequency and initial phosphorus concentration,on the passivation effect of simulated Lake water were studied.The results showed that when the other conditions were the same,the deactivator had the best deactivation effect when the dosage was 0.07 g,the pH was 6-9,the oscillation time of the deactivator was 45 min,the oscillation frequency was medium speed(180 r/min),and the initial concentration of phosphorus was not more than 3mg/L.Orthogonal experiments showed that the optimal combination of levels was that the initial concentration of phosphorus was not more than 3mg/L,the oscillation frequency was medium speed(180r/min),and the dosage was 0.06g.According to the analysis of SPSS software,the influence of initial phosphorus concentration,oscillation frequency and dosage on deactivation effect of the deactivator decreased in turn.