改性膨润土强化混凝去除再生水中菲

Modified bentonite enhanced coagulation to remove phenanthrene from reclaimed water

以纳米四氧化三铁(Fe_(3)O_(4))和十六烷基三甲基溴化铵(CTAB)对膨润土有机磁化改性后制得复合材料FCB,以FCB作为助凝剂协同絮凝剂聚合氯化铝(PAC)对再生水中的菲进行强化混凝去除实验。结果表明,改性后负载上了Fe_(3)O_(4)和CTAB,层间距扩大,有机碳含量增加,FCB投加量320 mg/L,PAC投加量15 mg/L时,菲去除率达94.58%,剩余浊度为0.8 NTU;随着FCB投加量增加菲去除率不断增加,过度投加FCB会使浊度变大:菲混凝最佳pH为6~7;随初始浊度增加,菲去除率小幅度提高。

The composite material FCB is prepared after the organic magnetization of nano-ferric oxide(Fe_(3)O_(4))and cetyltrimethylammonium bromide(CTAB)on the bentonite,and the FCB is used as a coagulant aid to synergize the flocculant to polymerize and chlorinate aluminum(PAC)conducted an enhanced coagulation removal experiment on phenanthrene in the reclaimed water.The results showed that the original soil was loaded with Fe_(3)O_(4) and CTAB,the interlayer spacing was enlarged,and the organic carbon content increased.The dosage of FCB was 320 mg/L and the dosage of PAC was 15 mg/L,the removal rate of phenanthrene reaches 94.58%,and the remaining turbidity is 0.8 NTU;with the increase of FCB dosage,the removal rate of phenanthrene continues to increase,and excessive addition of FCB will increase the turbidity:the best pH of phenanthrene coagulation is 6~7;as the initial turbidity increases,the phenanthrene removal rate increases slightly.