Partial lead service line replacement (PLSLR) may be performed when tap water lead concentrations exceed the action level and in association with water main replacement or other maintenance. Partially replacing lead pipes with copper tubing can create a galvanic couple if the lead and copper are connected by a metal coupling, which can potentially enhance lead release by galvanic corrosion. The effect of two types of couplings, brass and plastic, on lead release after a simulated PLSLR was investigated in a set of laboratory-scale experiments. Experiments were conducted in a recirculation flow mode with intermittent stagnation periods using aged lead pipes harvested from Providence, RI. Release of both dissolved and particulate lead was higher for the brass-coupled systems than for the plastic-coupled systems, and galvanic corrosion was the primary cause of significant particulate lead release from the brass-coupled systems. For brass-coupled systems, longer stagnation times resulted in dramatically more release of particulate lead. Sampling of different volumes following stagnation showed that lead release for the brass-coupled systems was locally much higher in the region closest to the coupling. The impact of galvanic corrosion persisted for the six weeks of the experiment.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1016/j.watres.2012.06.046 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Lead/Cadmium Impacts on Zeolite-Tobermorite: Nutrient Release and Sediment Stability.
Environ Pollut
January 2025
Department of Mineral Processing Engineering, Taiyuan University of Technology, Taiyuan 030024, China.
To realize the comprehensive utilization of large amounts of high-ash coal slime and comprehensively understand the excellent performance of nutrient release and lead and cadmium adsorption of high-ash coal slime silicon composite materials, green and safe mild hydrothermal conditions (200 °C) were used to prepare the rich-rich coal slime. Zeolite/tobermorite composites (Z-TOBs) were used in this study. Batch adsorption tests and repeated extraction tests were used to determine whether silicon, potassium, and calcium nutrients of Z-TOBs have sustained release properties and are affected by pH.
View Article and Find Full Text PDFPhotosensitive Hybrid γδ-T Exosomes for Targeted Cancer Photoimmunotherapy.
ACS Nano
January 2025
Department of Paediatrics & Adolescent Medicine, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong SAR, China.
Melanoma is the most aggressive type of skin cancers. Traditional chemotherapy and radiotherapy have limited effectiveness and can lead to systemic side effects. Photodynamic therapy (PDT) is a photoresponsive cancer therapy based on photosensitizers to generate reactive oxygen species (ROS) to eradicate tumor cells.
View Article and Find Full Text PDFThe silent pandemic of stress: impact on menstrual cycle and ovulation.
Stress
December 2025
Division of General Internal Medicine, Mayo Clinic, Jacksonville, Florida, USA.
In the current age of technological advancement, stress has emerged as a silent pandemic affecting individuals, especially young generations, globally. Factors such as increased competition, social pressures fueled by social media and smartphones, and a sense of diminished control in the face of modern challenges contribute to rising stress levels. In addition to the negative implications on mental well-being, stress affects physiological processes such as the menstrual cycle.
View Article and Find Full Text PDFPharmacist-Directed Transition of Care Services Decrease Readmissions at a Safety-Net Hospital.
Ann Pharmacother
January 2025
Hennepin Healthcare, Minneapolis, MN, USA.
Background: Limited data exist describing the influence of pharmacist-led transition of care (TOC) services in safety-net hospital settings.
Objective: This analysis assessed the impact of pharmacist-led TOC services on hospital readmissions in a high-risk managed Medicaid population impacted by housing instability, substance use disorder (SUD), and mental health issues.
Methods: A retrospective evaluation of patients who received safety-net hospital-based TOC pharmacy services between January 1, 2022, and December 31, 2022, was conducted.
The Formation and Features of Massive Vacuole Induced by Nutrient Deficiency in Human Embryonic Kidney Cells.
Front Biosci (Landmark Ed)
January 2025
Department of Cardiovascular Medicine, Binzhou Medical University Hospital, 256603 Binzhou, Shandong, China.
Background: Cellular vacuolization is a commonly observed phenomenon under physiological and pathological conditions. However, the mechanisms underlying vacuole formation remain largely unresolved.
Methods: LysoTracker Deep Red probes and Enhanced Green Fluorescent Protein-tagged light chain 3B (LC3B) plasmids were employed to differentiate the types of massive vacuoles.
Want AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!