GO-CNT三维复合膜截留HA与抗污染性能

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Abstract GO-CNT three-dimensional composite membrane was fabricated in order to achieve a high water flux and to mitigate humic acid (HA) fouling. The results exhibited that GO-CNT membranes had a rougher surface than GO membrane. The CNTs were intercalated in GO lamellas uniformity, constituting a 3D network structure. GO-20%CNT membrane with the loading of 30μg/cm² achieved a rejection of over 90% on HA, and its water flux was improved to 2times higher than that of GO membrane. In acidic condition, the size of HA increased due to molecular aggregation, and the surface negative charge decreased due to protonation. So the rejection of HA during filtration through GO-CNT composite membranes improved but water flux decreased. The compression of electric double layer caused by the increased ion strength declined the Donnan effect, the results showed that the HA rejection of GO-CNT composite membrane decreased from 90.2% to 31.9%. The pure water flux of 3D GO-CNT composite membrane was decreased by 10.95% after filtering HA for 1hour, and the flux recovery rate was 99.68% after washing for 1hour. The composite membrane exhibited an excellent antifouling performance with flux recovery rate of 6.18%, which was much higher than reported GO membrane.

Key words： graphene oxide carbon nanotubes humic acid membrane fouling

Received: 12 May 2017

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	Articles by authors
	LIU Zhong-tao
	GUO Zhen-hua
	HU Cheng-zhi
	MA Ying-li
	SUN Jing-qiu

Cite this article:

LIU Zhong-tao,GUO Zhen-hua,HU Cheng-zhi等. Rejection of HA and antifouling performance with 3D GO-CNT composite membrane[J]. CHINA ENVIRONMENTAL SCIENCECE, 2017, 37(12): 4556-4563.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2017/V37/I12/4556

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