【摘要】 该研究通过投加化学药剂比选、药剂投加浓度和投加方式优化试验,考察了投加化学药剂对城市黑臭河流水质的改善效果和适用性。结果表明,投加过氧化钙能够快速提高水体溶解氧含量,同时降低水体总磷含量。在该试验条件下,投加400 mg/L的过氧化钙后水中的溶解氧迅速升高,但1天后即恢复到投加前水平。由于投加过氧化钙增氧的成本相对较高,并且水体流动性会影响过氧化钙的增氧效果,投加过氧化钙方法仅适用于对封闭的污染水体进行快速增氧和修复。更多还原

【Abstract】 In order to know the feasibility of adding chemical agent for polluted city river remediation,the effect of some chemical agents under different concentrations and adding methods were investigated.The experimental results showed that dissolved oxygen concentration in water increased and total phosphorus concentration in water decreased by adding calcium peroxide.Dissolved oxygen concentration in the surface of polluted river decreased rapidly after 1 day upon injection.Because the cost of calcium peroxide was relatively high and the flow of river will lead a rapid loss of dissolved oxygen by adding calcium peroxide,the method of adding calcium peroxide is estimated to be suited for the remediation of closed and stagnant polluted water bodies.更多还原