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采用二氧化氯消毒的给水管网中氯酸根和亚氯酸根浓度在管网前后端存在明显差异,研究了管网中各因素对水中消毒副产物转化的影响,并在此基础上分析给水管网中氯酸根和亚氯酸根浓度的消减模型。研究结果表明,各因素中碳酸钙吸附和管网材质对氯酸根和亚氯酸根浓度的影响最大。在20℃、p H值=7、氯酸根或亚氯酸根初始浓度为1.5 mg/L时,碳酸钙对氯酸根和亚氯酸根的吸附率分别为23.3%、38.0%,纯铁管材管网中氯酸根和亚氯酸根的消减率分别为43.3%和48.0%。温度、p H值和紫外照射对氯酸根的影响微弱,而在30℃、p H值=5和紫外照射下的亚氯酸根分解率最高。
Chlorine dioxide and chlorite concentration in the water supply network using chlorine dioxide disinfection there are significant differences in the front and back of the pipe network to study the impact of various factors on the conversion of water disinfection byproducts, and on this basis to analyze the water supply pipe Reduction model for the concentration of chlorate and chlorite in the net. The results show that the factors of CaCO3 adsorption and pipe network material have the greatest influence on the concentration of chlorate and chlorite. At 20 ℃, p H = 7, and the initial concentration of chlorate or chlorite was 1.5 mg / L, the adsorption rates of calcium carbonate to chlorate and chlorite were 23.3% and 38.0%, respectively The reduction rates of chlorite and chlorite were 43.3% and 48.0% respectively. The influence of temperature, p H value and ultraviolet irradiation on the chlorate radical was weak, while at 30 ° C the p H value was 5 and the chlorite decomposition rate was highest under UV irradiation.