非对称流场流技术分离生活污水中纳米颗粒物的参数优化  

Parameter Optimization of Nanoparticle Separation from Domestic Sewage by Asymmetrical Flow Field-Flow Technology

作　　者：孙池 张波[1] 何义亮[1] Sun Chi;Zhang Bo;He Yiliang(School of Environmental Science and Engineering,Shanghai Jiaotong University,Shanghai 200240,China)

机构地区：[1]上海交通大学环境科学与工程学院,上海200240

出　　处：《净水技术》2018年第10期55-61,共7页Water Purification Technology

基　　金：国家自然科学基金面上项目(21677097);江西省持久性污染物控制与资源循环利用重点实验室开放基金课题"水体中纳米颗粒物的分离;识别与定量分析研究"(ST201522002)

摘　　要：采用非对称流场流分离仪(AF4)分离生活污水中的纳米颗粒物,研究AF4分离污水中纳米颗粒物的前处理方法及各参数对分离效果的影响和方法优化。逐一对进样量、水平流流速、交叉流流速、洗脱时间、分离膜进行了考察,确定了最优化分离条件:进样量为100μL,水平流流速为2 mL/min,交叉流流速为2 mL/min,洗脱时间为15 min,膜孔径为10 kDa。试验表明,水平流流速增大会缩短洗脱时间,交叉流增大可以提高峰宽,分离膜采用10 kDa再生纤维素膜可以满足经济性需求并实现较好的分离效果。Asymmetrieal flow field-flow fraetionation （AF4） was used to separate nanopartieles in domestic sewage. The pretreatment method and specific effects of AF4 parameters on separation efficiency as well as parameter optinfization were studied. The effects of injection volume, horizontal flow rate, cross flow rate, elution time and separation menlbrane were investigated to deternfine the optimal separation conditions and the final parameters were as follows： injection volume was 100 μL, horizontal flow rate was 2 mL/nfin, cross flow rate was 2 mL/nfin, elution time was 15 min, and membrane pore size was 10 kDa. Experiments showed that the increase of horizontal flow rate could shorten the elution time, and the cross flow could increase the peak width. Besides, 10 kDa regenerated cellulose membrane adopted as separation membrane could satisfy the economy demand and achieve better separation efficiency.

关 键 词：非对称流场流 生活污水 纳米颗粒物 优化 

分 类 号：TU991[建筑科学—市政工程]