| Fouling of nanofiltration membrane by effluent organic matter： Characterization using different organic fractions in wastewater |
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| 引用本文： | ZHANG Liqing,WANG Lei,ZHANG Gang,,WANG Xudong . Key Laboratory of Northwest Water Resource,Environment , Ecology,MOE,Xi’an University of Architecture , Technology,Xi’an ,China. . School of Civil , Architectural Engineering,University of Jinan,Jinan ,China.Fouling of nanofiltration membrane by effluent organic matter： Characterization using different organic fractions in wastewater[J].环境科学学报(英文版),2009,21(1). |
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| 作者姓名： | ZHANG Liqing WANG Lei ZHANG Gang WANG Xudong . Key Laboratory of Northwest Water Resource Environment Ecology MOE Xi’an University of Architecture Technology Xi’an China. . School of Civil Architectural Engineering University of Jinan Jinan China |
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| 作者单位： | ZHANG Liqing,WANG Lei,WANG Xudong(Key Laboratory of Northwest Water Resource, Environment and Ecology, MOE, Xi'an University of Architecture & Technology, Xi'an 710055, China);ZHANG Gang(Key Laboratory of Northwest Water Resource, Environment and Ecology, MOE, Xi'an University of Architecture & Technology, Xi'an 710055, China; School of Civil and Architectural Engineering, University of Jinan, Jinan 250022, China)
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| 基金项目： | 国家自然科学基金，国家重点基础研究发展计划(973计划)，the Fund of Shann'xi Educational Committee |
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| 摘 要： |
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| 关 键 词： | 废水处理 纳米过滤膜 分子重量分布 亲水性 疏水性 |
Fouling of nanofiltration membrane by effluent organic matter:Characterization using different organic fractions in wastewater |
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| ZHANG Liqing,WANG Lei,ZHANG Gang,WANG Xudong.Fouling of nanofiltration membrane by effluent organic matter:Characterization using different organic fractions in wastewater[J].Journal of Environmental Sciences,2009,21(1). |
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| Authors: | ZHANG Liqing WANG Lei ZHANG Gang WANG Xudong |
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| Abstract: | The UF membrane with molecular weight cutoff (MWCO) ranging from 2 kDa to 100 kDa and XAD-8 resin were employed to identify the characteristic of molecular weight (MW) distribution of wastewater effluent organic matter (EfOM) in terms of TOC and UV254, as well as the amounts of the hydrophilic/hydrophobic organic fractions in different MW ranges. Then, the nanofiltration (NF) membrane fouling experiments were carried out using the above fractionated water to investigate the effect of MW distribution and hydrophilic/hydrophobic characteristics of EfOM on the membrane flux decline using the fractionated water samples above. The experimental results have shown that 45.61% of the total organics belongs to the low MW one, among which the percentage of the hydrophilic organics with low MW (less than 2 kDa) was up to 28.07%, while that of the hydrophobic organics was 17.54%. In particular, the hydrophilic fraction was found to be the most abundant fraction in the effluents. MW distribution has a significant effect on the membrane fouling. When the MW was less than 30 kDa, the lower the MW, the larger was the specific flux decline, while in the case of MW higher than 30 kDa, the higher the MW, the larger was the specific flux decline, and the decline degree of low MW organics was larger than the high MW one. With the same MW distribution range, specific flux decline of the hydrophilic organic was considerably slower than that of the hydrophobic organic, which indicated that the hydrophobic organic fractions dominantly contribute to the flux decline. |
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| Keywords: | molecular weight (MW) distribution hydrophilic/hydrophobic NF specific flux |
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