粉末活性炭预沉积去除藻类有机物及其对膜污染的影响

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Abstract Effectiveness of PAC pre-deposition and pre-adsorption to remove the algal organic matter (AOM) extracted from Prorocentrum donghaiense was investigated. The differences in membrane flux, fouling resistance, hydrophilicity and roughness of membrane surface between direct ultrafiltration (UF), PAC pre-deposition-UF and PAC pre-adsorption-UF were analyzed. The effects of pore structure and deposition doses on AOM removal rates and membrane fouling were evaluated. It was found that DOC and UV₂₅₄ removal rates could be enhanced by pre-deposition and pre-adsorption, and the former was more favorable for AOM removal than the latter. Mesoporous PAC had a better effect on the improvement of AOM removal rate than microporous PAC during pre-deposition treatment. Compared with direct UF, the removal rates of DOC and UV₂₅₄ were increased by 25.1% and 33.6%, respectively, when the deposition amount of mesoporous PAC was 0.4g/L. The analysis of UV absorbance ratio index (URI) confirmed that the aromatic groups could be selectively removed over aliphatic groups using PAC pre-deposition and pre-adsorption. The cake layer resistance (R_c) and the pore resistance (R_p) were decreased by 39.6% and 81.2%, respectively, when PAC pre-deposition were used before AOM UF. Membrane fouling rate was reduced by PAC pre-deposition because a PAC cake layer was formed between UF membrane and AOM, resulting in the mitigation of irreversible fouling.

Key words： powdered activated carbon (PAC) pre-deposition algal organic matter (AOM) ultrafiltration (UF) membrane fouling

Received: 08 November 2017

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Corresponding Authors: 王静,教授级高级工程师,wang_nana@163.com E-mail: wang_nana@163.com

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	WANG Wen-hua
	ZHAO Jin
	SI Xiao-guang
	JIANG Tian-xiang
	MA Yu-hui
	WANG Xun-liang
	WANG Jing

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WANG Wen-hua,ZHAO Jin,SI Xiao-guang等. Removal of algal organic matter (AOM) by powdered activated carbon (PAC) pre-deposition and its effect on membrane fouling[J]. CHINA ENVIRONMENTAL SCIENCECE, 2018, 38(6): 2135-2143.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2018/V38/I6/2135

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