常规工艺强化去除给水系统中的卡马西平

卡马西平作为抗癫痫类药物被广泛使用,在环境中频繁被检出,且浓度较高,不易去除,通常作为环境中药品和个人护理品污染状况的指示化合物,由于它的潜在危害,日益成为新兴污染物研究的重点。模拟城市给水厂工艺流程,研究卡马西平在城市给水处理工艺中的迁移转化规律,并对常规工艺进行强化,找出去除卡马西平的最优条件。在预氧化阶段,氧化剂高锰酸钾最佳投加量为1.5 mg/L,预氧化时间为50 min,卡马西平的最高去除率达到19.8%;在混凝阶段,聚合氯化铝最佳投加量为2 mg/L,在弱酸性条件下对卡马西平的去除率最佳,达到28.7%左右;砂滤阶段的最佳条件为滤柱高度800 mm,过滤速度不超过5 m/h,最高去除率达到11.7%。结果表明:通过高锰酸钾的预氧化作用,城市给水厂常规工艺对水源水中卡马西平的去除率得以较大提高,总去除率达到60.2%。

Enhanced Process in Conventional Water Treatment System for Removal of Carbamazepine

Carbamazepine(CBZ)as an antiepileptic drug has been found existed in surface water and even in drinking water,which together with other kinds of PPCPs has become the focus of potential environmental risk management.Bench scale experiment was carried out on the basis of conventional water treatment process including coagulation and sandfiltration,which was enhanced by pre-oxidation using KMnO4.The operation condition,which was influenced by pH, dosages of chemical(sKMnO4 and poly-aluminum chloride)and thickn...