混凝-活性炭吸附工艺去除水中甲氰菊酯农药

通过对含甲氰菊酯农药的模拟水样进行混凝活性炭吸附处理,分别考察了混凝剂种类、投加量、pH等因素对混凝效果的影响以及木质粉末活性炭投加量、吸附时间、pH等因素对吸附效果的影响。结果表明,对水样作常规混凝处理时,氯化铁的处理效果优于其他混凝剂,当氯化铁的投加量为20mg/L,pH为8时,甲氰菊酯去除率可达59.4%。对水样做活性炭吸附处理时,适宜pH范围为6~9,木质粉末活性炭最佳投加量为40mg/L,最佳吸附时间为70min,在最优吸附条件下,甲氰菊酯去除率可达81.6%。在最优混凝吸附条件下,氯化铁混凝协同木质粉末活性炭吸附去除甲氰菊酯的去除率均大于90%,对水中甲氰菊酯去除效果较好。

Removal of fenpropathrin pesticides from water with coagulation-activated carbon adsorption process

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.