water contamination Articles
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Possible ways to improve sediment deposition in the Nemunas delta
The deposition of sediment in the inundated floodplains of rivers, particularly in their deltas, improves the water quality of the rivers themselves and of their receivers. It would be very useful if ways to increase the amount of sediment deposition could be identified. An investigation into a number of possibilities was carried out in the delta of the River Nemunas. Various factors can ...
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Bio-toilets: Sustainable Solution to India’s Sanitation Challenge
Sanitation facilities in India are alarming with over 600 million people (half of India's population) having no access to toilets. People are forced to defecate in the open. This poses health hazards, raises environmental concerns and leads to water contamination. This is coupled with the Indian Railways’s open-chute toilet system wherein the human waste drops on the rail tracks. Untreated ...
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Visible light induced photocatalytic degradation of rhodamine B by magnetic bentonite
The photocatalytic activity of magnetic bentonite, Fe3O4 nanoparticles decorated Al-pillared bentonite (Fe3O4/Al-B), for the degradation of rhodamine B (RhB) in the presence of H2O2 under visible light (VL) was evaluated. The effects of different reaction parameters such as catalyst dose, dye concentration and externally added H2O2 were also investigated. The magnetic bentonite showed good ...
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Outbreak of acute gastroenteritis due to a washwater-contaminated water supply, Switzerland, 2008
An operating error in a sewage treatment plant led to severe drinking water contamination in a well-defined district of a suburban municipality of Zurich, Switzerland. Despite the alert issued to the local population on the same day advising people not to consume the contaminated water, cases of acute gastroenteric diseases were subsequently observed. Considerable faecal contamination was ...
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A coupled stochastic/deterministic model to estimate the evolution of the risk of water contamination by pesticides across Canada
Periodic assessments of the risk of water contamination by pesticides help decision makers to improve the sustainability of agricultural management practices. In Canada, when evaluating the risk of water contamination by pesticides, there are two main constraints. First, because the area of interest is large, a pesticide transport model with low computational running time is mandatory. Second, ...
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Contamination accidents in China's drinking water distribution networks: status and countermeasures
In recent years, frequent urban drinking water contamination accidents have caused significant impacts on society in China. However, emergency measures are primarily realized as management policies lack systematic technologies especially for those within-network contamination accidents. The aim of this paper is to perform analysis on cases of contaminant accidents that occurred in water ...
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Unique sponge system contains water contaminants in storm drains
Untitled Document SmartSponge technology captures oil and hydrocarbons from stormwater runoff, preventing its discharge into receiving waters. Water quality is being bolstered in dozens of locations around the United States through the use of a rather simple system. The concept is simple – a polymer “sponge” that removes contaminants from water before it winds up passing ...
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Common Treatment Technologies for Explosives in Ground Water, Surface Water, and Leachate
Explosives-contaminated process waste waters can be subdivided into two categories: red water, which comes strictly from the manufacture of TNT, and pink water, which includes any washwater associated with load, assemble, and pack (LAP) operations or with the demilitarization of munitions involving contact with finished explosive. Despite their names, red and pink water cannot be identified by ...
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Principal water contaminants that affect the productivity of your industrial organization
Many industrial plants get their process water from the same places that municipalities get their drinking water: fresh surface water & fresh groundwater sources. Though water from these sources may need additional treatment before they are potable, this is not strictly necessary if used as industrial process water. However, certain naturally occurring minerals can harm process equipment. ...
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Preventing a Future Crisis - Addressing Water Contamination & Treatment in Flint, Michigan
Poisoning conjures up images of evil men sneaking away as unsuspecting victims clutch their throats and fall over dead at the dinner table. The reality of poisoning is much more sinister, and its potential sits on a larger scale than most municipalities and states are willing to acknowledge. Lead, bacteria, copper, and other contaminants are drifting in the pipes of Flint, Michigan, and resting ...
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Source identification of sudden contamination based on the parameter uncertainty analysis
It is important to identify the source information after a sudden water contamination incident occurs in a water supply system. The accuracy of the simulation model's parameters determines the accuracy of the source information. However, it is difficult to obtain the true value of these parameters by existing methods, so reduction of the errors caused by the uncertainty of these parameters is ...
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Zerovalent Iron nanoparticles for treatment of ground water contaminated by Hexachlorocyclohexanes
Ground water and aquifer samples from a site contaminated by hexachlorocyclohexanes (HCHs; C6H6Cl6) were exposed to nanoscale iron particles to evaluate the technology as a potential remediation method. The summed concentration of the HCH isomers in ground water was approximately 5.16 µmol L–1 (1500 µg L–1). Batch experiments with 2.2 to 27.0 g L–1 iron nanoparticles showed that more than 95% of ...
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Issues concerning spectral analysis of water samples for monitoring and treatment of public water resources
Experimental measurements conducted in the laboratory, involving hyperspectral analysis of water samples taken from public water resources, have motivated a re-evaluation of issues concerning the potential application of this type of analysis for water monitoring, treatment and evaluation prior to filtration. One issue concerns hyperspectral monitoring of contaminants with respect to types and ...
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Why is mining wastewater treatment necessary?
During Industrial processes and mining, there are certain discharges of environmental pollution. This outcome is the growing concerns about the living atmosphere. As per the increasing concerns of contamination, there should be a lot of efforts and implementation to save the environment from its hazardous effects. Mining wastewater is originated from those mines where underground mining is ...
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Passive samplers for chemical substance monitoring and associated toxicity assessment in water
The European legislation, and in particular the Water Framework Directive requires the development of cost efficient monitoring tools that can provide the required information for the assessment of water contamination. Passive sampling methods represent one of the novel tools that have a potential to be used in various regulatory monitoring programmes aimed at assessing the levels of chemical ...
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Water-based diseases
Waterborne diseases are caused by pathogenic microorganisms which are directly transmitted when contaminated fresh water is consumed. Contaminated fresh water, used in the preparation of food, can be the source of foodborne disease through consumption of the same microorganisms. According to the World Health Organization, diarrheal disease accounts for an estimated 4.1% of the total DALY ...
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Contaminated Water
Treatment of Contaminated Mine Water Discharge Recent estimates have suggested that in the UK 2,500 km of streams and an area of 9,000 km2 of groundwater bodies are at risk of failure of Water Framework Directive Objectives due to mine water pollution (Jarvis & Rees 2004). For over two decades the Loughor Estuary in South Wales, which carries SSSI status, had been polluted by high iron ...
By BritishFlora
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CL#9 - In Situ BioLogix Application - Case Study
Site Information Soil and ground water contamination by chlorinated solvents was discovered at a former industrial chemical mixing facility that was to be redeveloped as a shopping center. The contamination had leached from the soil underlying a drum storage area into ground water and spread across the property. While the area of contamination was relatively small (5,000 square feet) and ...
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Using Cl-Out to Finish Remediation Following Chemical Oxidation
CL-Out was used to complete the remediation of ground water contaminated by chlorinated solvents from a former dry cleaning site in Rockville, Maryland. The ground water contamination had migrated from leaking sewer lines to underlying bedrock fractures. Fenton’s Reagent was first applied to the site, but the PCE concentrations increased due to desorption. Subsequently, sodium ...
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Mechano-chemical ageing of PES/PVP ultrafiltration membranes used in drinking water production
In water treatment by microfiltration and ultrafiltration, a major concern is the integrity loss or failure of membrane induced by onsite operations, potentially leading to permeate water contamination. This study aims to provide a better understanding of the phenomena responsible for membrane damage by analyzing its causes and effects. The role of sodium hypochlorite exposure conditions and ...
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