河道水体磷的存在形态及混凝去除效果研究

Existing forms of phosphorus in rivers and removal efficiency by coagulation

研究北京转河磷的形态分布及混凝对各形态磷的去除效果。试验表明,颗粒态总磷约占水体总磷的67.57%,可溶性总磷占32.43%。从季节分布看,总磷质量浓度在当年的7-9月份达到最高,接近270μg/L,在12月,次年1月达到最低,接近120μg/L。在混凝沉淀后各形态磷大部分得以去除,颗粒态磷去除率达88.8%,缩合态磷去除率相对最低,为61.72%,正磷酸盐几乎完全被去除。

The distribution of various forms of phosphorus in the Zhuanhe River of Beijing was investigated. Particulate total phosphorus and dissolved total phosphorus were 67.57 % and 32.43 %, respectively, of the total phosphorus. Total phosphorus concentration was the highest, approaching 270 μg/L, in July, August and September, and was clown to the lowest, about 120 μg/L, in December and January. The removal efficiency of phosphorus by eoagulation and floeculation was studied. Experimental results show that most of the phosphorus was removed. The removal rates of particulate phosphorus and polyphosphate were, respectively, 88.8% and 61.72%, and the orthophosphate was almost totally reinoved.