DOI: 10.1016/j.watres.2018.06.036
Scopus记录号: 2-s2.0-85049341203
论文题名: Four release tests exhibit variable silver stability from nanoparticle-modified reverse osmosis membranes
作者: Bi Y. ; Han B. ; Zimmerman S. ; Perreault F. ; Sinha S. ; Westerhoff P.
刊名: Water Research
ISSN: 431354
出版年: 2018
卷: 143 起始页码: 77
结束页码: 86
语种: 英语
英文关键词: Antibacterial
; Biofilm release
; Dissolution
; Fouling
; Nanotechnology
Scopus关键词: Dissolution
; Fouling
; Microfiltration
; Nanotechnology
; Reverse osmosis
; Silver nanoparticles
; Testing
; Water filtration
; Water treatment
; Antibacterial
; Cross flow filtration
; Dead-end filtration
; Extraction solution
; Functionalized membranes
; Nano particulates
; Release behaviors
; Surface Functionalization
; Osmosis membranes
; antiinfective agent
; polyamide
; silver nanoparticle
; water
; adsorption
; antimicrobial activity
; biofouling
; dissolution
; extraction method
; filtration
; membrane
; nanoparticle
; nanotechnology
; polymer
; reverse osmosis
; silver
; adsorption
; Article
; controlled study
; cost
; crossflow filtration
; dissolution
; extraction
; filtration
; fouling control
; hypobarism
; immersion
; kinetics
; mass
; molecular stability
; particle size
; priority journal
; release assay
; reverse osmosis
; surface property
; volume
; water treatment
英文摘要: Modification of polyamide reverse osmosis (RO) membranes with silver nanoparticles (AgNP) may effectively control biofouling. While silver leaching tests are usually performed during membrane development, the lack of common testing protocols limits cross-comparison among different labs. We compare four release tests to quantify the release of dissolved and nanoparticulate silver from polyamide RO membranes prepared through in situ surface functionalization: (1) batch immersion, (2) dead-end filtration, (3) cross-flow filtration, and (4) low-pressure water jetting. For the first time, we demonstrated the possibility of AgNP release to membrane-treated water through direct AgNP detachment. When using Nanopure water as an extraction solution, water jetting resulted in the fastest silver mass release, while dead-end filtration caused the slowest release based on the initial release kinetic data. Dead-end filtration exhibited silver mass release an order of magnitude lower than the other three tests. Although cross-flow filtration may best represent the RO membrane operation, quantifying silver release suffers from poor mass balance due to the adsorption of dissolved silver by various reactor components and large volumes of water usage. A commonly applied batch immersion method was low cost and easily performed, but may not induce hydraulic shear sufficient for AgNP detachment from a RO membrane. The information on silver release behavior may depend on the specific test, which is important for assessing antimicrobial efficacy and service life of the nanoparticle-functionalized membranes. © 2018 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/112543
Appears in Collections: 气候减缓与适应
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作者单位: Nanosystems Engineering Research Center for Nanotechnology-Enabled Water Treatment, School of Sustainable Engineering and The Built Environment, Arizona State University, Tempe, AZ 85287-3005, United States
Recommended Citation:
Bi Y.,Han B.,Zimmerman S.,et al. Four release tests exhibit variable silver stability from nanoparticle-modified reverse osmosis membranes[J]. Water Research,2018-01-01,143