CPAM及PAC强化混凝去除景观水中DON的研究

Removal of DON from landscape water by enhanced coagulation with CPAM and PAC

分别选用硫酸铝(AS)、聚合氯化铝(PACl)作混凝剂,阳离子型聚丙烯酰胺(CPAM)作助凝剂,粉末活性炭(PAC)作吸附剂,进行了CPAM强化混凝以及PAC预吸附去除景观水中DON的试验研究。试验结果表明,AS和PACl的最佳投加量分别为40mg/L和30mg/L,PACl的混凝效果优于AS;投加CPAM强化混凝可使AS和PACl两种混凝剂对DON、TN去除率分别提高约16%、4%和25%、2%;而PAC的预投加可使AS和PACl混凝对TN、DON、UV254的最高去除率分别达到20%、51%、68%和19%、53%、69%。

Removal experiments of DON from landscape water by enhanced coagulation with cationic polyacrylamide(CPAM)and absorption with powdered activated carbon(PAC)through selecting aluminum sulfate(AS)and polymerization aluminum chloride(PACl)as coagulants,CPAM as coagulant aids and PAC as adsorbent.The experiment results show that optimal dosage of AS and PACl is40mg/L and30mg/L respectively,the coagulating effect of PAC is better than those of AS,and the removal rate of TN and DON can be increased about16%and4%by adding CPAM for enhancing AS or about25%and2%by adding CPAM for enhancing PACl.Through pre-dosing PAC,the maximum removal rates of TN,DON and UV254can be reached about20%,51%and68%respectively if taking AS as coagulant or about19%,53%and69%if taking PACl as coagulant.