Floc structure and membrane fouling affected by sodium alginate interaction with Al species as model organic pollutants

CORC > 生态环境研究中心 > 中国科学院生态环境研究中心 > 中国科学院饮用水科学与技术重点实验室

	Floc structure and membrane fouling affected by sodium alginate interaction with Al species as model organic pollutants
	Xiong, Xuejun ; Xu, Hui ; Zhang, Beiping ; Wu, Xiaohui ; Sun, Hongyan ; Wang, Dongsheng ; Wang, Zhengyang
刊名	JOURNAL OF ENVIRONMENTAL SCIENCES
	2019-08-01
卷号	82 页码:1-13
关键词	Coagulation-ultrafiltration process Al species Interface interaction X-ray photoelectron spectroscopy Floc properties Membrane fouling
ISSN号	1001-0742
英文摘要	Membrane filtration combined with pre-coagulation has advantages in advanced wastewater treatment. As a model of a microbial polysaccharide, research on the effect of sodium alginate (SA) on alum hydrolysis has been rare; therefore, it is necessary to gain insight into the interface interaction between SA molecules and Al species, and the role SA plays during floc formation. In this study, the interaction mechanism between SA and Al species has been investigated, by evaluating the effect of SA on floc characteristics and membrane fouling during coagulation-ultrafiltration with different Al species coagulants (AlCl3 and preformed Al-13). Al 2p X-ray photoelectron spectroscopy (XPS) confirmed that the complexation of ligands and Al species strongly affects the reaction pathways for Al hydrolysis and the final nature of the flocs, as Al-13 can be decomposed into octahedral precipitates when SA is added. The presence of SA can affect floc properties, which have important impacts on the characteristics of the cake layer and membrane fouling. Due to the bridging ability of SA, the floc strength increased by about 50% using Al-a, which was much better than preformed Al-13, with a percentage increase of only about 6%. Moreover, the recovery factor of HA-flocs was decreased from 96% to 43% with SA addition of 0.5 mg/L. It was concluded that SA can affect the characteristics of the cake layer and membrane fouling through participating in the formation of primary flocs and altering the Al hydrolysis pathway. (c) 2019 The Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences. Published by Elsevier B.V.
内容类型	期刊论文
源URL	[http://ir.rcees.ac.cn/handle/311016/43467]
专题	生态环境研究中心_中国科学院饮用水科学与技术重点实验室
作者单位	1.Huazhong Univ Sci & Technol, Sch Environm Sci & Engn, Wuhan 430074, Hubei, Peoples R China 2.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, Key Lab Drinking Water Sci & Technol, 18 Shuangqing Rd, Beijing 100085, Peoples R China 3.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, State Key Lab Environm Aquat Chem, Beijing 100085, Peoples R China
推荐引用方式 GB/T 7714	Xiong, Xuejun,Xu, Hui,Zhang, Beiping,et al. Floc structure and membrane fouling affected by sodium alginate interaction with Al species as model organic pollutants[J]. JOURNAL OF ENVIRONMENTAL SCIENCES,2019,82:1-13.
APA	Xiong, Xuejun.,Xu, Hui.,Zhang, Beiping.,Wu, Xiaohui.,Sun, Hongyan.,...&Wang, Zhengyang.(2019).Floc structure and membrane fouling affected by sodium alginate interaction with Al species as model organic pollutants.JOURNAL OF ENVIRONMENTAL SCIENCES,82,1-13.
MLA	Xiong, Xuejun,et al."Floc structure and membrane fouling affected by sodium alginate interaction with Al species as model organic pollutants".JOURNAL OF ENVIRONMENTAL SCIENCES 82(2019):1-13.