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Synergistic process using Fe hydrolytic flocs and ultrafiltration membrane for enhanced antimony(V) removal
Ma, Baiwen; Wang, Xing; Liu, Ruiping; Jefferson, William A.; Lan, Huachun; Liu, Huijuan; Qu, Jiuhui
2017-09-01
Source PublicationJOURNAL OF MEMBRANE SCIENCE
Volume537Issue:0Pages:93-100
AbstractAntimony (Sb) is harmful to human health, and Sb(V) is much more difficult to remove from water than other toxic elements such as arsenic (As). Theoretical studies have suggested that in situ flocs have stronger adsorption ability toward heavy metals than pre-made adsorbents. We believe that rational design of in situ flocs and the associated device structure will enable a floc-based device to be utilized in the removal of heavy metals. Based on this concept, we developed an integrated process taking advantage of the strong adsorption abilities of in-situ Al or Fe hydrolytic flocs and excellent separation properties of ultrafiltration (UF) membranes. We found that flocs could be well dispersed in a membrane tank with aeration from the bottom, and Fe-based flocs performed better in removing Sb(V) and alleviating membrane fouling than Al-based flocs. We also demonstrated that higher Sb (V) removal efficiency was induced with continuous injection, and lower solution pH. By controlling the aeration rate, injection frequency and the solution pH, membrane fouling was alleviated, especially under weakly acidic conditions. Additionally, owing to the higher rejection efficiency of the UF membrane, the effluent quality was improved, including the iron concentration, turbidity, and chromaticity. This innovative separation method shows promising potential for application in removing heavy metals in water treatment.
Department中国科学院饮用水科学与技术重点实验室
KeywordIn Situ Fe Hydrolytic Flocs Ultrafiltration Membrane Integrated Process Antimony(v) Removal Fouling Properties
Document Type期刊论文
Identifierhttp://ir.rcees.ac.cn/handle/311016/39737
Collection中国科学院饮用水科学与技术重点实验室
Recommended Citation
GB/T 7714
Ma, Baiwen,Wang, Xing,Liu, Ruiping,et al. Synergistic process using Fe hydrolytic flocs and ultrafiltration membrane for enhanced antimony(V) removal[J]. JOURNAL OF MEMBRANE SCIENCE,2017,537(0):93-100.
APA Ma, Baiwen.,Wang, Xing.,Liu, Ruiping.,Jefferson, William A..,Lan, Huachun.,...&Qu, Jiuhui.(2017).Synergistic process using Fe hydrolytic flocs and ultrafiltration membrane for enhanced antimony(V) removal.JOURNAL OF MEMBRANE SCIENCE,537(0),93-100.
MLA Ma, Baiwen,et al."Synergistic process using Fe hydrolytic flocs and ultrafiltration membrane for enhanced antimony(V) removal".JOURNAL OF MEMBRANE SCIENCE 537.0(2017):93-100.
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