纳米铁强化的混凝-沉淀-过滤工艺对典型印染废水中有机物去除  

Coagulation-sedimentation-multi media filtration process of nanoscale iron for enhanced organic complexes of dye printing wastewater

作　　者：郑蓓[1] 葛小鹏[1] 王志霞[1,2] 林进[2] 魏东洋[3] 

机构地区：[1]中国科学院生态环境研究中心环境水质学国家重点实验室,北京100085 [2]河北师范大学化学与材料科学学院,石家庄050016 [3]环境保护部华南环境科学研究所,广州510655

出　　处：《环境科学学报》2011年第2期245-253,共9页Acta Scientiae Circumstantiae

基　　金：国家基础研究发展计划项目(No.2007CB407304);国家科技重大专项"水体污染控制与治理"项目(No. 2008ZX07211-006-1)~~

摘　　要：以东江流域某典型印染企业尾水为研究对象,将混凝剂与少量的纳米铁进行复合投加,再结合多介质过滤器对印染尾水进行深度处理实验研究.结果表明,新型混凝剂HPAC-9对极性有机物具有较强的去除能力,但对非极性或弱极性有机物去除效果不很理想.通过将纳米铁与HPAC-9复合投加并结合多介质过滤工艺,对印染企业尾水中的有机污染物进行强化去除,可取得较好的处理效果,使水体中难降解有机污染物得以大幅度的削减,从而验证了纳米铁强化-混凝-沉淀-多介质过滤工艺用于印染尾水中难降解有机污染物深度处理的可行性.同时,实验结果还表明,纳米铁的投加量不宜过大,否则由于Fe0的转化溶出,导致工艺出水中残余较多亚铁离子,在静置过程中会发生氧化变色,从而使出水色度加大.Dye printing wastewater from a local bleaching and dyeing enterprise in the East river basin underwent advanced treatment via composite dosing of nano-scale iron and polyaluminum chloride （PACl） coagulants by the Multi-Media Filtration Process. The results show that the new coagulant HPAC-9 has strong ability to remove polar organic matter,but is unfavorable for non-,or weakly polar organics. Composite dosing of nano-scale iron enhanced organic removal from dye printing wastewater,and emission of biorefractory organic pollutants was largely reduced,verifying the feasibility of nano-scale iron composite dosing in advanced treatment of refractory organic pollutants of dye printing wastewater by the coagulation-sedimentation-multi media filtration process. It is also concluded that the dosage of nanoscale iron should be maintained at a very small level in case excess Fe2＋ ions are formed due to the dissolution of Fe0,which will cause a color increase in the process effluents because of the slow oxidization of ferrous ions during storage.

关 键 词：印染废水 聚合氯化铝 纳米铁 多介质过滤 

分 类 号：X703.1[环境科学与工程—环境工程]