DOI: 10.1016/j.watres.2018.10.048
Scopus记录号: 2-s2.0-85055983234
论文题名: Performance comparison of hematite (Α-Fe2O3)-polymer composite and core-shell nanofibers as point-of-use filtration platforms for metal sequestration
作者: Greenstein K.E. ; Myung N.V. ; Parkin G.F. ; Cwiertny D.M.
刊名: Water Research
ISSN: 431354
出版年: 2019
起始页码: 492
结束页码: 503
语种: 英语
英文关键词: Electrospinning
; Inorganic contaminants
; Iron oxide
; Nanotechnology
; Polyacrylonitrile
; Sorption
Scopus关键词: Chromium compounds
; Copper compounds
; Electrospinning
; Embedded systems
; Groundwater
; Groundwater pollution
; Hematite
; Hydrothermal synthesis
; Iron oxides
; Lead compounds
; Lead removal (water treatment)
; Metals
; Nanofibers
; Nanoparticles
; Nanotechnology
; Polyacrylonitriles
; Potable water
; Shells (structures)
; Sorption
; Core-shell composites
; Core-shell nanofibers
; Hydrothermal treatments
; Inorganic contaminants
; Nano-particle dispersions
; Performance comparison
; Polyacrylonitrile (PAN)
; Water treatment technologies
; Chemicals removal (water treatment)
; ferric oxide
; nanocomposite
; nanofiber
; polyacrylonitrile
; cation
; composite
; drinking water
; filter
; hematite
; inorganic compound
; iron oxide
; nanoparticle
; nanotechnology
; performance assessment
; polymer
; sorption
; water treatment
; adsorption
; Article
; controlled study
; dispersion
; electrospinning
; filtration
; isotherm
; limit of detection
; one pot synthesis
; particle size
; pH
; priority journal
; scanning electron microscopy
; surface area
; water treatment
英文摘要: Point-of-use water treatment technologies can help mitigate risks from drinking water contamination, particularly for metals (and metalloids) that originate in distribution systems (e.g., chromium, lead, copper) or are naturally occurring in private groundwater wells (e.g., arsenic). Here, composite nanofibers of polyacrylonitrile (PAN) with embedded hematite (α-Fe2O3) nanoparticles were synthesized via a single-pot electrospinning synthesis. A core-shell nanofiber composite was also prepared through the subsequent hydrothermal growth of α-Fe2O3 nanostructures on embedded hematite composites. Properties of embedded hematite composites were controlled using electrospinning synthesis variables (e.g., size and loading of embedded α-Fe2O3 nanoparticles), whereas core-shell composites were also tailored via hydrothermal treatment conditions (e.g., soluble iron concentration and duration). Although uptake of Cu(II), Pb(II), Cr(VI), and As(V) was largely independent of the core-shell variables explored, metal uptake on embedded nanofibers increased with α-Fe2O3 loading. Both materials exhibited maximum surface-area-normalized sorption capacities that were comparable to α-Fe2O3 nanoparticle dispersions and exceeded that of a commercial iron oxide based sorbent. Further, both types of composite exhibited strong performance across a range of environmentally relevant pH values (6.0–8.0). Notably, core-shell structures, with a majority of surface accessible α-Fe2O3, performed far better than embedded composites in kinetically limited flow through systems than was anticipated from their relative performance in equilibrium batch systems. Core-shell nanofiber filters also retained much of the durability and flexibility exhibited by embedded nanofibers. Additional tests with authentic groundwater samples demonstrated the ability of the core-shell nanofiber filters to remove simultaneously both As and suspended solids, illustrating their promise as a nano-enabled technology for point-of-use water treatment. © 2018 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/122188
Appears in Collections: 气候变化事实与影响
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作者单位: Department of Civil and Environmental Engineering, University of Iowa, Iowa City, IA 52242, United States; Department of Chemical and Environmental Engineering, U.C. RiversideCA 92521, United States; Department of Chemical and Biochemical Engineering, University of Iowa, Iowa City, IA 52242, United States
Recommended Citation:
Greenstein K.E.,Myung N.V.,Parkin G.F.,et al. Performance comparison of hematite (Α-Fe2O3)-polymer composite and core-shell nanofibers as point-of-use filtration platforms for metal sequestration[J]. Water Research,2019-01-01