用于处理地表水的微滤膜的粉末活性炭预处理

Powder Activated Carbon Pretreatment of a Microfiltration Membrane for the Treatment of Surface Water.

作者信息

Song Yali, Dong Bingzhi, Gao Naiyun, Ma Xiaoyan

机构信息

School of Civil Engineering and Architecture, Zhejiang University of Science and Technology, Hangzhou 310023, China.

College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China.

出版信息

Int J Environ Res Public Health. 2015 Sep 10;12(9):11269-77. doi: 10.3390/ijerph120911269.

This study focused on the effect of powder activated carbon (PAC) adsorption on microfiltration (MF) membrane performance. The results showed that PAC pretreatment offered high organic matter removal rates for both dissolved organic carbon (DOC) and ultraviolet absorbance at 254 nm (UV254) during 10-200 mg/L PAC dosage. The removal efficiencies of organic matter by MF membrane filtration decreased with the increase of organic matter removal rate by PAC adsorption. PAC mainly removed organic matter of about 3 kDa molecular weight (MW). MF membrane maintained more than 5 kDa MW organic matter on the membrane after PAC adsorption. The results of membrane filtration indicated that PAC pretreatment slightly promoted membrane flux, regardless of PAC dosage. It seems that the organic matter fouling membrane was concentrated in more than 3 kDa MW. PAC removed markedly less than 3 kDa MW organic matter and had less effect on more than 3 kDa organic matter. Thus, PAC cannot reduce membrane fouling.

本研究聚焦于粉末活性炭（PAC）吸附对微滤（MF）膜性能的影响。结果表明，在PAC投加量为10 - 200 mg/L时，PAC预处理对溶解有机碳（DOC）和254 nm处的紫外吸光度（UV254）均具有较高的有机物去除率。随着PAC吸附有机物去除率的增加，MF膜过滤对有机物的去除效率降低。PAC主要去除分子量约为3 kDa的有机物。PAC吸附后，MF膜截留分子量大于5 kDa的有机物。膜过滤结果表明，无论PAC投加量如何，PAC预处理均略微提高了膜通量。似乎造成膜污染的有机物集中在分子量大于3 kDa的部分。PAC对分子量小于3 kDa的有机物去除明显较少，对分子量大于3 kDa的有机物影响较小。因此，PAC不能减轻膜污染。