|Promoting dynamic adsorption of Pb2+ in a single pass flow using fibrous nano-TiO2/cellulose membranes|
|Li, Yanxiang1; Li, Lei1,2; Cao, Lixia1; Yang, Chuanfang1
|Source Publication||CHEMICAL ENGINEERING JOURNAL
|Abstract||A variety of nano-TiO2/cellulose composite fibers (TiO2/CF) were synthesized via both in situ growing rutile TiO2 nanocrystals and electrostatic self-assembly of commercial nano rutile TiO2 particles onto cellulose fibers. These fibers were then processed into fibrous membrane beds by wet-laid technique. Dynamic adsorption of lead (Pb2+) was subsequently carried out by pumping the feed solution through the bed in a single-pass flow mode. The influence of various parameters including flow rate, bed height and bed stacking pattern on bed breakthrough behavior was investigated. It was found that the in situ-TiO2/CF bed outperformed others; its loading capacity of Pb2+ was 13 times that of pure CF bed, and 9 times that of the self-assembled TiO2/cellulose bed prior to 10% breakthrough. The dynamic adsorption behavior of the in situ-TiO2/CF bed was better predicted by Dose Response model among other models tested. The bed was also selective for Pb2+ over Ca2+, and was readily regenerable when eluted with 0.1 M HCl solution for repeated use. The outstanding performance of the in situ-TiO2/CF bed was a result of larger fiber adsorption capacity and faster adsorption kinetics compared with the other beds having similar geometric bed structure. (C) 2015 Elsevier B.V. All rights reserved.|
|WOS Headings||Science & Technology
|WOS Keyword||FIXED-BED COLUMN
; HEAVY-METAL REMOVAL
; OXIDE NANOMATERIALS
; ARSENIC REMOVAL
|WOS Research Area||Engineering
|WOS Subject||Engineering, Environmental
; Engineering, Chemical
|Funding Organization||Chinese Academy of Sciences
; National Nature Science Foundation of China(51302267
|Affiliation||1.Chinese Acad Sci, Inst Proc Engn, Key Lab Green Proc & Engn, Natl Key Lab Biochem Engn, Beijing 100190, Peoples R China|
2.Univ Chinese Acad Sci, Beijing 100190, Peoples R China
Li, Yanxiang,Li, Lei,Cao, Lixia,et al. Promoting dynamic adsorption of Pb2+ in a single pass flow using fibrous nano-TiO2/cellulose membranes[J]. CHEMICAL ENGINEERING JOURNAL,2016,283(JAN):1145-1153.
Li, Yanxiang,Li, Lei,Cao, Lixia,&Yang, Chuanfang.(2016).Promoting dynamic adsorption of Pb2+ in a single pass flow using fibrous nano-TiO2/cellulose membranes.CHEMICAL ENGINEERING JOURNAL,283(JAN),1145-1153.
Li, Yanxiang,et al."Promoting dynamic adsorption of Pb2+ in a single pass flow using fibrous nano-TiO2/cellulose membranes".CHEMICAL ENGINEERING JOURNAL 283.JAN(2016):1145-1153.
Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.