water contaminant Articles
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Water Contaminants and Their Treatment
Because many water contaminants are invisible and odorless, samples should be tested to determine a treatment plan. Many steps may be necessary to make water potable Many traditional sources of fresh water, both surface water and groundwater, may carry visible and invisible contaminants that make it unsuitable for consumption. The World Health Organization (WHO) has established Guidelines for ...
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Biosensors - Using DNA as a biosensor to detect contaminants in water
Biosensor - Using DNA to detect water contamination. ...
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Walkerton: requiem for the New Public Management in Ontario?
In May 2000, seven residents of Walkerton, Ontario, died, and hundreds more became seriously ill as a result of the contamination of the town's water supply. Immediately, residents and environmental activists pointed to the weakening of the province's environment ministry as the principal cause. Since coming to power in 1995, the Progressive Conservatives had taken steps to privatise and ...
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Water contamination in fuel: cause and effect
Water exists in three physical states and depending on the surrounding conditions it finds its way to the fuel systems like the high pressure common rail (HPCR) fuel systems on diesel engines. The important point thereafter is to provide the best possible on-engine protection by securing the fuel injector systems from severe damage. As the environmental challenges and emission regulations become ...
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Water as a weapon in ancient times: considerations of technical and ethical aspects
This paper addresses the issue of how water played a role in ancient conflicts, from the poisoning of water sources to flooding, to stop the advance of enemy armies. It deals with military actions quoted by several ancient Greek and Roman authors, who in some cases narrate these experiences first-hand. Although many abhorred such actions, they were considered tactical expedients to resort to, ...
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Potential Drinking Water Contamination Analyzed
A comparison of more than 100 large US cities showed pollution from point and nonpoint sources Too often, surveys of water quality in the United States have been regionally inconsistent patchworks that neglect many unregulated contaminants. A granular study of potential source water contamination in the largest cities in the U.S. has been lacking. New research in the journal Nature, however, ...
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Pakistan Facing Deadly Water Contamination
Drought, overdraft of aquifers, and water contamination all contribute to an ever-increasing water crisis in Pakistan. 40% of deaths in country are attributed to critical pollution problem An estimated 40% of all deaths in Pakistan are caused by ingesting contaminated water — water filled with industrial waste, arsenic, diseases, and sewage. As recently as the late 1990s, ...
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Remove the Tea Bag Without Removing the Building
When a source of ground water contamination or contaminant vapors is present under a building, efforts to mitigate the spread of contamination may continue indefinitely with mounting costs. Bioremediation may be used to remove the source of vapors or ground water contamination without damage to the building or interrupting operations. There are many examples of this approach in the case studies ...
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Case Study - Isle of Wight (UK)
The isle of Wight Council look after the Castlehaven Coastal Protection scheme in the Niton area of the island. They were having trouble with the ground water contamination, possibly from the septic tanks, which was causing iron related bacteria to grow in the ground stabilisation dewatering wells. ...
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Water contamination - Types, sources, effects, solutions
Access to clean and safe water is a basic human right, but many communities face the challenge of lacking water, resulting in serious health risks, environmental impacts, and economic consequences. According to the United Nations, up to 1 in 4 people does not have access to safe drinking water. Out of those, a significant percent resort to using unsafe water. When water is considered unsafe to ...
By LG Sonic
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A Faster and Better FluidScan with Version 5
Measure water contamination in turbine oils down to 300 ppm The latest version of FluidScan software can detect total water presence as low as 300 ppm in turbine oils. The method provides an alternative to laboratory tests such as Karl Fischer titration when fast, simple, and reagent-free analysis is needed. In addition to measuring water contamination, the FluidScan analyzer provides ...
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Storm water contaminant loading following southern California wildfires
Contaminant loading associated with stormwater runoff from recently burned areas is poorly understood, despite the fact that it has the potential to affect downstream water quality. The goal of the present study is to assess regional patterns of runoff and contaminant loading from wildfires in urban fringe areas of southern California. Postfire stormwater runoff was sampled from five wildfires ...
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Incorporating potable water sources and use habits into surveys that improve surrogate exposure estimates for water contaminants: the case of bisphenol A
Human biomonitoring studies for water contaminants are often accompanied by surveys relying solely on total drinking water consumption rates, thus, failing to account for specific water sources (bottled and tap water) and use habits, such as water used for preparing cold/hot beverages (coffee, tea, juice, etc.). Despite the extensive use of bisphenol A (BPA) in polycarbonate (PC)-based water ...
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Effect of pH on selective decomposition of target water contaminants onto porous TiO2 photocatalyst
Non-selectivity of TiO2-based photocatalysis is a known drawback of this technology for full scale water treatment applications. It results in significant decline in decomposition of toxic target contaminants when other non-toxic organic compounds such as natural organic matter (NOM) compete in the reaction. Previously, size exclusion of large NOM onto the mesoporous structure of TiO2 ...
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Fecal contamination of drinking water in Kericho District, Western Kenya: role of source and household water handling and hygiene practices
Inadequate protection of water sources, and poor household hygienic and handling practices have exacerbated fecal water contamination in Kenya. This study evaluated the rate and correlates of thermotolerant coliform (TTC) household water contamination in Kericho District, Western Kenya. Culture and multiplex polymerase chain reaction (PCR) techniques were used to characterize TTCs. The disk ...
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CL#7 - In Situ BioLogix Application - Case Study
Site Information Dry cleaning solvents were found in the ground water at the former location of a dry cleaning facility at a commercial shopping center. Most of the mass of ground water contamination was located under a bank that was built over the former dry cleaners, restricting access for remediation. The PCE plume was estimated to be 30,000 square feet. The PCE concentration was greater than ...
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Vulnerability of complex critical systems: case water supply and distribution networks
Management of complex, interdependent critical infrastructures demands systematic continuity evaluations and capability building for abnormal as well as normal conditions. The changing risk and threat environment creates new vulnerabilities that require an extensive approach to control weak points and support the undisturbed and reliable functions of critical infrastructures. The water ...
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Modeling of coastal water contamination in Fortaleza (Northeastern Brazil)
An important tool in environmental management projects and studies due to the complexity of environmental systems, environmental modeling makes it possible to integrate many variables and processes, thereby providing a dynamic view of systems. In this study the bacteriological quality of the coastal waters of Fortaleza (a state capital in Northeastern Brazil) was modeled considering multiple ...
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Study: Drinking Water Contaminants Cause 100,000 Cancers
Researchers suggest ways to reduce risks in water sources A new Environmental Working Group (EWG) study of contaminants in drinking water, conducted between 2010 and 2017 in the United States, suggests they may cause 100,000 lifetime cancer cases. The research team of Sydney Evans, Chris Campbell, and Olga V. Naidenko attributed the cumulative risk primarily to arsenic, disinfection byproducts, ...
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AquaGate+Organoclay Installation Profile
This article provides an overview of an installation of AquaGate+Organoclay material to reduce sheens at a historic MGP site. AquaGate+Organoclay provides the abiltiy to place a powder organoclay through the water, in direct contact with contaminants in sediment. Organoclay is a well known and documented material used in the oil & gas industry for adsorption of hydrocarbon-based ...
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