【摘要】 以饮用水嗅味污染的典型物质土臭素及2-甲基异莰醇作为研究对象,分别考察了水厂常规工艺混凝沉淀、活性炭与不同混凝剂(聚合氯化铝、硫酸铝、氯化铁)强化混凝对嗅味物质的去除效果,并结合UV254、浊度指标考察了3种混凝剂对投加活性炭后水体的净化效果。结果表明,常规工艺对嗅味物质的去除率较低,活性炭强化混凝对土臭素及2-甲基异莰醇的去除率较高,其中对GSM的去除率均达到90%以上,对2-MIB的去除率均达到80%左右,改变活性炭投加量及吸附时间对嗅味物质的去除率影响较大,而改变混凝剂的种类及浓度对嗅味物质的去除率影响不大,3种混凝剂中聚合氯化铝对投炭后水体的净化效果最好。更多还原

【Abstract】 Taking the geosmin and 2-methylisoborneol as subjects, which were the main substances of the taste and odor contamination in drinking water,the removal effect of waterworks conventional process,such as coagulation,sedimentation and enhanced coagulation with activated carbon and different coagulants,such as polyaluminum chloride,aluminum sulfate and ferric chloride,on taste and odor substances were investigated combining with UV254 and turbidity respectively. The results indicated that the removal rate was lower on taste and odor substances by conventional process. The removal rates of geosmin and 2-methylisoborneol were higher by activated carbon enhanced coagulation.The removal rate of GSM was above 90%,and of 2-MIB was about 80%. The variation of activated carbon dosage and adsorption time had more influence on the removal rate of taste and odor substances.The variation of coagulant types and concentration had less effect on removal rate of taste and odor substances. The polyaluminum chloride had satisfied purification effect after dosing carbon in the three kinds of coagulants.更多还原