DOI: 10.1016/j.watres.2018.11.076
Scopus记录号: 2-s2.0-85058120884
论文题名: Lead and copper release from full and partially replaced harvested lead service lines: Impact of stagnation time prior to sampling and water quality
作者: Doré E. ; Deshommes E. ; Laroche L. ; Nour S. ; Prévost M.
刊名: Water Research
ISSN: 431354
出版年: 2019
起始页码: 380
结束页码: 391
语种: 英语
英文关键词: Copper
; Drinking water
; Lead
; Partial lead service line replacement
; Sampling
Scopus关键词: Binary alloys
; Chlorine compounds
; Copper
; Copper alloys
; Lead
; Potable water
; Sampling
; Sulfur compounds
; Water quality
; Chloride-to-sulfate mass ratios
; Copper concentration
; Copper release
; Galvanic connection
; Lead concentration
; Remedial actions
; Sampling protocol
; Service line
; Chemical detection
; chloride
; copper
; drinking water
; lead
; sulfate
; concentration (composition)
; copper
; drinking water
; flushing
; lead
; replacement
; sampling
; water quality
; Article
; concentration (parameters)
; flow rate
; pH
; pipeline
; priority journal
; simulation
; velocity
; water flow
; water quality
; water sampling
英文摘要: Partial lead service line replacement (PLSLR) results in the addition of a new galvanic connection and can increase lead concentrations at the tap. Focus has been given to minimizing lead release after PLSLR, but little information is available on the impact of lead remedial actions on copper concentrations, especially before passivation occurs. The impact of water quality (decreased chloride-to-sulfate mass ratio from 0.9 to 0.3; addition of orthoP; pH increase to 8.3) on lead and copper concentrations was investigated after stagnation (30 min–336 h) in a pipe rig comparing full lead service line (LSL), and two configurations of partial LSLs (Cu-Pb and Pb-Cu). Results show different trends for lead and copper: maximum lead concentrations were reached in 16 h while copper concentrations continued to increase over 336 h. Lead release rates were also the highest in the first 16 h of stagnation and were strongly impacted by water quality and the configuration of PLSLR (Cu-Pb vs Pb-Cu). Increasing the sampling flow rate from 5 to 15 LPM drastically increased the particulate lead release (78-fold) in Pb-Cu configurations; this effect was however not observed in 100% Pb or Cu-Pb configurations. High velocity flushing prior to 16 h stagnation decreased total Pb release by a factor of 12-fold for Cu-Pb, 1.6-fold for Pb-Cu and 2.0-fold for 100% Pb. Results support the definition of sampling protocols targeted for the detection of lead and copper sources and the proscription of flushing prior to sampling. © 2018 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/122082
Appears in Collections: 气候变化事实与影响
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作者单位: NSERC Industrial Chair on Drinking Water, Department of Civil, Mining and Geological Engineering, Polytechnique Montreal, Montréal, QC H3T 1J4, Canada; Ville de Montréa, Technical Expertise Division, Montreal, QC H8N 2K2, Canada
Recommended Citation:
Doré E.,Deshommes E.,Laroche L.,et al. Lead and copper release from full and partially replaced harvested lead service lines: Impact of stagnation time prior to sampling and water quality[J]. Water Research,2019-01-01