A5082761394- Heavy Metal Exposure and Toxicity
- Heavy metals in environment
- Water Treatment and Disinfection
- Noise Effects and Management
- Air Quality and Health Impacts
- Environmental Justice and Health Disparities
- Urban Stormwater Management Solutions
- Recycling and Waste Management Techniques
- Bacterial biofilms and quorum sensing
- Water Systems and Optimization
- Water Governance and Infrastructure
- Legionella and Acanthamoeba research
- Mercury impact and mitigation studies
- Dental Research and COVID-19
- Water Quality and Pollution Assessment
Polytechnique Montréal
2010-2022
Natural Sciences and Engineering Research Council
2010-2018
Abstract In vivo estimations of Pb particle bioavailability are costly and variable, because the nature animal assays. The most feasible alternative for increasing number investigations carried out on is in vitro testing. This testing method requires calibration using data an adapted model, so that results will be valid childhood exposure assessment. Also, test must reproducible within between laboratories. Relative Bioaccessibility Leaching Procedure, which calibrated with soils, presents...
The authors investigated factors influencing the occurrence of dissolved lead in tap water using different sampling protocols. principal factor affecting concentration at distribution system taps was length service lines (LSLs). However, levels first‐litre samples were also associated with particles being trapped aerator. Collecting sample after 30 min stagnation provided a good estimate premise plumbing and LSLs, even though it could sometimes underestimate peak concentrations LSLs. Also...
COVID-19 shutdowns drastically increased the frequency and duration of water stagnation events in building plumbing systems, urging local authorities to issue guidance for safe reopening buildings mostly by recommissioning flushing. The objectives this study were document dynamic changes bacterial indicators [adenosine triphosphate (ATP), total intact cell counts (TCC, ICC)] prevalence Legionella pneumophila ( Lp ) 20–21 showerheads a large before (16-week closure) then shortly (24 h)...
Drinking water represents a potential source of lead exposure. The purpose the present study was to estimate magnitude winter-to-summer changes in household levels (WLLs), and predict impact these variations on BLLs young children. A conducted from September, 2009 March, 2010 305 homes, with follow-up survey carried out June September 2011 subsample 100 homes randomly selected. first 1-L sample drawn after 5 min flushing, followed by further 4 consecutive samples 30 stagnation. Non-linear...
High particulate lead (Pb) levels can be measured in tap water, but the hazard linked to Pb ingestion is unknown. An vitro test was developed determine bioaccessibility of particles from based on Relative Bioaccessibility Leaching Procedure validated for soils, and applied lab-generated field collected behind aerator tap. Field were found 43% 342 taps investigated equipped with an aerator, contained significant amounts (0.003-71%, median 4.7%). The ranged 2 96% depending particle type...
Common point‐of‐use (POU) devices that met NSF/ANSI‐53 certification standards for lead removal before July 16, 2007, were evaluated the reduction of and other trace metals in drinking water. Systematic testing evaluation various POUs focused on particulate dissolved efficacy, under conditions different from those addressed NSF‐53 protocol (particle type, water tested, levels). Tap‐mounted under‐the‐sink showed, globally, adequate performance, although NSF threshold value 10 pg/L was...
Profile sampling was conducted using 112 dwellings of various types and configurations water pipes consisting lead service lines (LSLs). A detailed investigation plumbing volumes in 44 these homes. Results revealed a wide range piping volume associated profiling trends. These differences are critical for exposure assessment interpretation regulatory results that most often use first draw after stagnation. Moreover, while peak levels the profiles were comparable between households, which...
Thirty-three households were monitored in a full-scale water distribution system, to investigate the impact of recent (<2 yr) or old partial lead service line replacements (PLSLRs). Total and particulate concentrations measured using repeat sampling over period 1-20 months. Point-of-entry filters installed capture sporadic release from lines (LSLs). Mean increased immediately after PLSLRs erratic spikes observed 18 month post-PLSLR monitoring period. The mass released during this time frame...
The performance of point‐of‐use (POU) devices to remove dissolved and particulate lead (Pb) their effect on tap water quality were investigated in a large building under typical usage patterns during one year. Both forms Pb efficiently removed, although materials downstream the POU slightly increased total levels at tap. No evidence breakthrough was observed following stagnations carried out before sampling. Although measurements heterotrophic place counts live bacteria material itself...
Profile, regulatory, and investigative sampling were completed in six utilities to study the impact of partial full lead service line replacements (LSLRs) on water levels (WLLs) consumer's exposure. As compared households with no replacement, release after LSLR (PLSLR) was generally greater short term (3-50 days), comparable or lower medium (<2 years) long-term (>2 years). This mainly explained by insufficient time elapsed stabilize scales disturbances line. One utility showed sustained over...
Utility and homeowner surveys were completed in 2015 to document the number of lead service lines (LSLs) Canadian utilities, share utilities’ knowledge, formulate recommendations on LSL management. LSLs represented <1 22% line connections distribution systems considered (average 23 LSLs/1,000 people). With exception two mostly partial replacements (LSLRs) conducted by utilities surveyed; flushing procedures post‐LSLR varied. Considering both surveys, following are suggested: improve...
Key Takeaways Under the Lead and Copper Rule Long‐Term Revisions, community water systems must establish an inventory of their lead service lines (LSLs); thus, material used for every line be identified. Developing, using, managing LSL involves multiple steps, resources, components, resulting information needs to accurate. An AWWA subcommittee interviewed 10 learn about processes creation, identification, customer communication, other aspects experiences.
ADVERTISEMENT RETURN TO ISSUEPREVAddition/CorrectionORIGINAL ARTICLEThis notice is a correctionCorrection to Pb Particles from Tap Water: Bioaccessibility and Contribution Child ExposureElise Deshommes*† Michèle Prévost†View Author Information† Ecole Polytechnique de Montreal, NSERC Industrial Chair on Drinking Water, CGM Department, C.P. 6079 succ. A, Montreal (QC) H3C 3A7, Canada*Phone: (+1) 514-340-4711 (2236); e-mail: [email protected]Cite this: Environ. Sci. Technol. 2012, 46, 24,...