DOI: 10.1016/j.watres.2018.06.008
Scopus记录号: 2-s2.0-85048560219
论文题名: Impact of chlorination on silver elution from ceramic water filters
作者: Lyon-Marion B.A. ; Mittelman A.M. ; Rayner J. ; Lantagne D.S. ; Pennell K.D.
刊名: Water Research
ISSN: 431354
出版年: 2018
卷: 142 起始页码: 471
结束页码: 479
语种: 英语
英文关键词: Ceramic water filters
; Chlorine
; Household water treatment
; Silver dissolution
; Silver nanoparticles
; Silver nitrate
Scopus关键词: Bandpass filters
; Biological materials
; Ceramic materials
; Chemicals removal (water treatment)
; Chlorination
; Chlorine
; Deionized water
; Dissolution
; Effluents
; Fuel filters
; Ionic strength
; Metal nanoparticles
; Nitrates
; Nitrogen removal
; Potable water
; Silver nanoparticles
; Sodium nitrate
; Water filtration
; Background solutions
; Effluent concentrations
; Household water
; Natural organic matters
; Silver concentration
; Silver nitrates
; Water filters
; World Health Organization
; Silver compounds
; casein
; chlorine
; deionized water
; natural organic matter
; silver nanoparticle
; silver nitrate
; ceramics
; chlorination
; chlorine
; domestic waste
; drinking water
; effluent
; filter
; guideline
; nanoparticle
; nitrate
; organic matter
; silver
; speciation (chemistry)
; water treatment
; World Health Organization
; Article
; chlorination
; dissolution
; effluent
; elution
; ionic strength
; priority journal
; water treatment
英文摘要: Applying silver nanoparticles (nAg) or silver nitrate (AgNO3) to ceramic water filters improves microbiological efficacy, reduces biofilm formation, and protects stored water from recontamination. A challenge in ceramic filter production is adding sufficient silver to achieve these goals without exceeding the maximum recommended silver concentration in drinking water. Silver release is affected by silver type, application method, and influent water chemistry. Despite a lack of data, there is an assumption that chlorinated water should not be used as influent water because it may increase silver elution. Thus, the objective of this work was to systematically evaluate the impact of chlorinated water (0–4 mg/L free chlorine residual, FCR) on silver release from ceramic filter disks painted with casein-coated nAg, painted with AgNO3, or containing fired-in nAg over a range of ionic strength (IS = 0–10 mM as NaNO3) in the presence or absence of natural organic matter (NOM). Influent deionized water containing chlorine increased silver release 2–5-fold compared to controls. However, this effect of chlorine was mitigated at higher IS (≥1 mM) or in the presence of NOM (3 mg C/L). For filter disks painted with nAg or AgNO3, silver release increased with increasing IS (with or without chlorine), and effluent concentrations remained above the World Health Organization (WHO) guideline of 0.1 mg/L even after 30 h (80 pore volumes, PVs) of flow with a background solution of 10 mM NaNO3. Silver speciation (nAg vs. Ag+) was monitored in effluent samples from painted or fired-in nAg filter disks. Results indicated that in general, greater than 90% of the eluted silver was due to Ag+ dissolution rather than nAg release. Additionally, a filter disk prepared with fired-in nAg exhibited a lower % released in the nanoparticle form (nAg = 5% of total Ag in effluent) compared to painted on nAg (nAg = 14% of total Ag in effluent). The findings of this study suggest that chlorinated influent water has minimal impact on silver elution from ceramic filters under simulated natural water conditions, and thus, the recommendation to avoid the use of chlorinated water with ceramic filters is not necessary under most conditions. © 2018 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/112616
Appears in Collections: 气候减缓与适应
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作者单位: Department of Civil and Environmental Engineering, Tufts University, Medford, MA 02155, United States; School of Engineering, Brown University, Providence, RI 02192, United States
Recommended Citation:
Lyon-Marion B.A.,Mittelman A.M.,Rayner J.,et al. Impact of chlorination on silver elution from ceramic water filters[J]. Water Research,2018-01-01,142