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Showing 1 to 20 of 27 for “"Lead Contamination"”.
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Mapping and mitigating soil total lead contamination in Chicago, Illinois
… of trace metal elements, in particular, lead (Pb), that present potentially severe risks to human health. Urbanized regions such as Chicago, in the north-central U.S., harbor soil total Pb that exceeds geogenic concentrations, often by orders of magnitude. Total Pb was quantified in …
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The Impacts Of Lead Contamination On The Community Of Herculaneum, Missouri
Lead contamination in Herculaneum, Missouri presents a complex context where the long history of a large lead processing plant has created an environmental health hazard. Local residents have been forced to balance their interest in promoting a clean and healthy local environment against their …
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Lead silicate solubility and the control of lead contamination in drinking water
The intake of lead into the human body has become an area of major concern because high levels of lead are harmful and can cause physiological damage, especially in children. It has been suggested that adding NaSiO₃might control Pb²⁺ contamination of drinking water supplies (c.g., Thresh 1922). …
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Awareness effects lead contamination in Zambia's Makululu and Kasanda Mine Compounds of Kabwe District
… the effects of environmental hazards in form of lead contamination in Makululu and Kasanda Mine Compounds of Kabwe district. To achieve the aim above, the objectives of the study were to establish the state of awareness by residents of Makululu and Kasanda Mine Compounds of Kabwe on the effects …
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Awareness effects lead contamination in Zambia's Makululu and Kasanda Mine Compounds of Kabwe District
… the effects of environmental hazards in form of lead contamination in Makululu and Kasanda Mine Compounds of Kabwe district. To achieve the aim above, the objectives of the study were to establish the state of awareness by residents of Makululu and Kasanda Mine Compounds of Kabwe on the effects …
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Understanding Mechanisms of Water Lead Contamination by Nitrate Spallation Corrosion and Lead Removal by Point-of-Use (POU) Filters
Lead enters drinking water by a process of corrosion, dissolution or particle detachment from lead bearing plumbing materials. Preventing contamination of water from lead-tin solder corrosion and achieving effective removal of particulate lead by point-of-use (POU) filters are important public …
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Reconsidering Lead Corrosion in Drinking Water: Product Testing, Direct Chloramine Attack and Galvanic Corrosion
The ban on lead plumbing materials in the Safe Drinking Water Act (1986) and the EPA Lead and Copper Rule (1991) have successfully reduced lead contamination of potable water supplies. The success of these regulations gave rise to a belief that serious lead contamination was an important past …
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Novel Insights into Lead Corrosion Control: Safely Changing Source Waters, Effective Use of Zinc Phosphate Inhibitors, Electrochemical Reversal of Solder, and Significance of Lead-Polyphosphate Complexation
Recent high profile lead contamination events arising from lead solder corrosion have drawn attention to our alarmingly inadequate understanding of corrosion control chemistry. This dissertation provides novel contributions to an improved understanding of lead corrosion control in four sequential …
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Association of Lead and Zinc on Fish Diversity in the Spring River Basin, Missouri
… integrity were associated with zinc and lead contamination in the Spring River Basin, southwest Missouri. Sampling sites were located in the Tri-State mining district where zinc and lead were once heavily mined, and from which zinc and lead contamination data were provided by the EPA. …
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Galvanic Lead Corrosion in Potable Water: Mechanisms, Water Quality Impacts, and Practical Implications
As stagnant water contacts copper pipe and lead solder (simulated soldered joints), a corrosion cell is formed between the metals in solder (Pb, Sn) and copper. If the resulting galvanic current exceeds about 2 µA/cm², a highly corrosive microenvironment can form at the solder surface, with pH <2.5 …
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Advancing Fundamental Understanding of Lead-Tin Solder Corrosion in Drinking Water: Nitrate Spallation Mechanism, Inhibition by Zinc Orthophosphate and Free Chlorine, and Implications for Canned Foods
Given rising concern over elevated lead in drinking water in the aftermath of the Flint Water Crisis, forthcoming revisions to the U.S. EPA Lead and Copper Rule (LCR), and federal funding designated for replacing lead service lines, lead-tin solder corrosion control will become increasingly …
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Evaluation of Zinc Orthophosphate to Control Lead Solder Corrosion in Waters With High Chloride to Sulfate Mass Ratio
… mass ratio (CSMR) and trigger serious water lead contamination from galvanic lead solder: copper pipe corrosion. Previous attempts to control this problem through simple water chemistry modifications were unsuccessful, but in this work a combination of zinc orthophosphate and moderate …
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Chloride Sulfate Mass Ratio (CSMR) and Nitrate Acceleration of Galvanic Lead- Bearing Solder Corrosion
Lead corrosion in premise plumbing systems from materials, such as lead pipes, soldered joints, and brass, can cause elevated lead in drinking water. This work examined mechanisms by which galvanic corrosion of lead solder:copper joints is accelerated by high chloride, low sulfate, and high nitrate …
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Examining Aspects of Copper and Brass Corrosion in Drinking Water
… (> 0.05 mm). While brass pipes (containing 0.09% lead, 63% copper and 36% zinc) was attacked non-uniformally by an aggressive water at high pH and with high Cl2 content, no significant pitting occurred at any condition tested, even though pitting did occur for copper exposed to the exact same …
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Phytoremediation of Metal Contamination Using Salix (Willows)
… to plants, animals, and humans. Cadmium (Cd) and lead (Pb) are metal contaminants often found in AMD. In my mine outwash water samples, cadmium and lead concentrations were 19 and 160 times greater than concentrations in control waterways, and 300 and 40 times greater than EPA Aquatic Life Use …
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Human health risk assessment: recreational use of a brownfield site volunteer Army ammunition plant chemical farmers industries, inc., lease area Chattanooga, Tennessee
This thesis investigates the suitability of a lead-contaminated Brownfield, the Volunteer Army Ammunition Plant (VAAP) site in Chattanooga, for recreational use such as children's softball. The assessment includes a review of soil sample data obtained at the VAAP by IT Corporation from 1994 to …
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Accumulation of Lead by Biofilms in Drinking Water Distribution Systems
… such as the one in Flint, MI, indicate that lead exposure from drinking water is a major health concern in the United States. Over six million lead service lines are still in use in the United States, and a universal protocol to safely remove these lead service lines from drinking water …
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Geospatial analysis of risk components for elevated blood lead levels in Kansas: geologic and anthropogenic factors
… demographic most susceptible to and affected by lead poisoning. Lead contamination in soil has been recorded as being primarily from lead-based paint, historic leaded gasoline emissions, and from lead point-source emitters. The highest risk of elevated blood lead level (BLL) is correlated with …
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EVALUATING RISK OF LEAD EXPOSURE IN SCAVENGING SPECIES LINKED TO BIG-GAME HUNTING IN SASKATCHEWAN, CANADA
For free-ranging animals, chronic exposure to lead, a toxic heavy metal, can manifest in discrete physiological changes, alter behaviours, and contribute to increased mortality. In Canada, although lead ammunition has been banned for hunting waterfowl, carrion contaminated with lead fragments from …
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Efficacy of the environmental laws in Zambia's mining sector.
… unintended consequences. One such example is lead contamination in Kabwe District and other legacy environmental liabilities have impacted on the communities negatively (effect of Sulphur dioxide in Kankoyo township of Mufulira) and also the old tailing dumps on the Copperbelt Province have …
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