通过投加不同混凝剂、助凝剂和氧化剂,对含溴氰菊酯农药的某水库原水进行强化混凝-氧化处理,探讨了不同条件下对原水的处理效果.结果表明,当对水样仅作常规混凝处理时,聚合氯化铝(PAC)的处理效果优于其他混凝剂,最佳投加量为18mg/L,最佳pH为9,最高去除率可达64.5％.投加助凝剂可提高混凝效果,聚丙烯酰胺(PAM)助凝效果优于水玻璃.混凝后水样再用高锰酸钾(KMnO4)氧化处理,结果表明,在水样pH为5,KMnO4投加量为0.6mg/L,氧化时间为25 min的条件下,溴氰菊酯去除率最高可达82.4％.

By coagulation-activated carbon adsorption treatment of simulated water samples containing Fenpropathrin pesticide,effects on coagulation of coagulant species,dosage,pH and other factors,and wood powdered activated carbon dosage,adsorption time,pH and other factors affecting the adsorption effect are studied.The results show that when water samples are under routine coagulation treatment,the treatment effect of ferric chloride is better than other coagulants.The optimum dosage of ferric chloride is 20 mg/L,the optimal pH is 8,and the highest removal efficiency is up to 59.4%.When water samples are under activated carbon adsorption treatment,the optimal pH range is 6 ~9,the optimum dosage of wood powdered activated carbon is 40 mg/L,and the optimum adsorption time is 70 min.Under optimum adsorption conditions,fenpropathrin removal rate can reach 81.6%.Under the optimum coagulation adsorption conditions,efficiency to remove fenpropathrin by ferric chloride coagulation collaborating wood powder activated carbon adsorption is greater than 90%,which shows better removal of fenpropathrin.