阿特拉津在给水处理工艺中的去除效果研究

Removal Effect of Atrazine in Drinking Water Treatment Processes

对阿特拉津(ATZ)在"高锰酸钾预氧化+常规水处理工艺+活性炭吸附"组合工艺中的去除效率及影响因素进行了研究。结果表明,高锰酸钾预氧化对水中ATZ的去除率较低,其去除率随着氧化剂投加量的增加而增加,但当高锰酸钾浓度大于10mg/L时,进一步增加氧化剂浓度,ATZ的去除率增加减缓;高锰酸钾的投加与二氧化锰的生成会增大水样的色度,使得溶液UV254和浊度值增大。溶液pH可改变颗粒活性炭(GAC)的表面特性,进而影响活性炭对有机物的吸附性能。经GAC吸附工艺后,阿特拉津浓度和溶液UV254均明显降低,但由于部分活性炭颗粒泄露造成溶液浊度升高。

In this study, potassium permanganate pre-oxidation and activated carbon adsorption were added on the basis of conventional water treatment technology to improve the removal effect of atrazine (ATZ) in water. The results showed that the removal rate of ATZ in water by potassium permanganate pre-oxidation was lower, and the removal rate of the target increased with the amount of oxidizer added, though it increased slowly when the concentration was more than 10mg/L. The addition of KMnO4 and the generation of manganese dioxide changed the color of the water sample, making the solution UV254 and turbidity values increased. pH didn’ttake effect on pre-oxidation and coagu lation obviously, but changed the surface characteristics of activated carbon, and then promoted the adsorption perfor mance of activated carbon to organic matter effectively. The concentration of ATZ and solution UV254 decreased sig nificantly after the GAC adsorption process, but the turbidity of the solution increased due to the leakage of some ac tivated carbon particles.