过氧化钙对磷的去除效果研究

Study on Effect of Calcium Oxide on Phosphorus Removal

在不同的条件下,对过氧化钙去除黑臭水体中磷的效果进行了研究。实验结果表明:温度对磷酸盐的去除率和磷的初始浓度有关,当初始浓度大于100 mg/L时,温度和去除率呈负相关;当初始浓度小于100 mg/L时,两者呈正相关。过氧化钙对磷酸盐的去除效率受pH值影响很大,分别对初始pH值和反应过程中的pH值进行了研究,当初始pH值为中性的时候,除磷效果最好,偏酸偏碱都不利于过氧化钙除磷。通过维持反应体系pH值可以发现,碱性越高除磷效果越好,当pH值为3时除磷效果为0。通过反应产物进行表征,发现过氧化钙和磷酸盐最终生成的是磷酸三钙。

In different conditions,the effect of calcium on the removal of phosphorus from black water was studied. The results show that the temperature on the removal rate of phosphate is related to the initial concentration of phosphorus. When the initial concentration is more than 100 mg/L,temperature and the removal are rate-negatively correlated,when the initial concentration is less than 100 mg/L,both were positively correlated. The effect of calcium oxide on the removal efficiency of phosphate was greatly affected by pH. The initial pH and reaction pH were studied respectively.When the initial pH was neutral,phosphorus removal effect is best,the partial acid or alkali is not conducive to removal phosphorus,by maintaining reaction system pH can be found that the higher thealkaline,the better of the phosphorus removal effect,when the pH is 3 the phosphorus removal effect is zero. It was found that calcium oxide and phosphate were produced by the reaction products that is tricalcium phosphate.