drinking water pollution Articles
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Removal of arsenic from anthropogenic aqueous media: an analytical review with particular reference to solvent extraction technique
Arsenic is an environmental toxicant, which is known to cause serious ailments to humans and its presence in drinking water poses grave threat to millions of people all over the world. Apart from being drinking water pollutant, arsenic poses another dimension of problem in the recovery of metals from some of the sulfide ores, namely copper pyrites and galena. These were the two main reasons to ...
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Searching for a sustainable arsenic mitigation strategy in Bangladesh: experience from two upazilas
Arsenic concentrations of tubewell water that exceed the Bangladesh Drinking Water Standard pose a serious health problem for millions of people in Bangladesh. Groundwater is the source of drinking water for 98% of the population. The main object of the study was to review the status of the provided options, which were distributed during 1999?2001 in two upazilas. It was observed that ...
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Impact of intermittent water supply on water quality in Lebanon
Lebanon in general and its capital, Beirut, suffer from water shortage due to the increasing water demand and the lack of proper management despite its abundant water resources. An intermittent water supply strategy was implemented in order to minimise deficiency problems. This, however, can seriously affect water quality due to the potential suction of non-potable water by negative pressures, ...
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Water purification by functionalised self-assembled monolayers on silica particles
This study focuses on a novel method to remove bio molecules and pathogens of different nature, such as proteins, viruses and oocysts, from water by silica particles coated with functionalised self-assembled monolayers. The results clearly show that organic species can efficiently be removed at pH ranges of drinking water by stirring the coated particles in the contaminated water for up to 60 min ...
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Study on migration modes and correlative factors of
Tubifex tubifex (Oligochaeta, Tubificidae) in source waterExcessive propagation of tubificid in eutrophic source water can result in its emergence in the drinking water plant, which has been a troublesome problem in recent years. The migration of tubificid, especially drift migration in the source water is the main cause of worm pollution in drinking water plant. Migration modes and correlative factors of Tubifex tubifex, dominating the tubificid ...
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Improvement of a pesticide immunosensor performance using site–directed antibody immobilisation and carbon nanotubes
The potential toxicity of pesticide residues in drinking water has meant a rigid regulation for the appearance of these pollutants. Thus, in this work, we developed a new immunosensor for atrazine detection. We focused on the optimisation of the antibody immobilisation method on sensor surface for the enhancement of the biosensor sensitivity. First, with site–directed immobilisation of rabbit ...
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Water scarcity projections
Things are changing globally — and long term trends are not very encouraging. The map here and its included commentary tell an extremely complex story. Water scarcity already affects every continent and around 2.8 billion people around the world at least one month out of every year. More than 1.2 billion people lack access to clean drinking water. It mostly affects arid and deserted areas, ...
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Performance of Moringa oleifera extracts and Sudfloc as coagulant aid in raw water treatment in Mauritius
Coagulation experiments were done using raw water samples from two treatment plants (herein referred to LMTP and LNTP) in Mauritius in jar tests using Moringa oleifera (MO) extract and Sudfloc. Both coagulant aids reduced alum consumption. Sudfloc was required in low concentration as compared to crude extracts of MO. On samples from LMTP, salt extract of MO (MOSE) was six times more efficient ...
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Ecological sanitation: An alternative route to sustainable livelihoods
Most of the cities in Nepal, except Kathmandu, the sewerage system and onsite sanitation system are very poor due to improper management, less attention, and lack of political commitment of Gevernments of Nepal. The planned and safe disposal of human excreta is a must for preventing drinking water from pollution and conserving soil fertility. The conventional linear approach to sanitation can ...
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Water Quality and Purity
Even an advanced country like the United States is facing significant water problems relating to availability, purity, and quality. Over 700 chemicals have been detected in U.S. drinking water as it comes out of the tap. EPA has classified 129 of them as being particularly dangerous. Drinking bottled water does not assure the absence of ...
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Hydro-geochemical characteristics of groundwater of Sirhind Nala sub-basin (Ghaggar river basin, India) in relation to salinity hazard
Hydro-geochemical investigation of groundwater of Sirhind Nala sub-basin of the Ghaggar river basin (Southwest Punjab) has been carried out to study the distribution and sources of various dissolved ions. The levels of EC indicated that high salinity of groundwater was confined to small patches. The variations in EC levels seem to be related to non-flushing of water entrapped by clay beds, ...
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The pollution source assessment tool for Sydney's drinking water catchments
WaterNSW funds a range of interventions to minimise pollution within the drinking water catchments of Sydney. To assist with the process of targeting this expenditure, WaterNSW has developed a spatial analysis tool, known as the Pollution Source Assessment Tool (PSAT), which uses a hybrid of multi-criteria analysis and load-based methods to highlight high pollution potential sites and ...
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Aerobic wastewater treatment processes history and development synopsis
This book is an overview of the development of aerobic waste water treatment and influences which shaped this development. The historical development of sewage treatment and the subsequent emergence of aerobic biological treatment methods is investigated from the early nineteenth century to the present day. In addition, the earlier historical background, up to the late ...
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Aerobic wastewater treatment processes history and development synopsis
A Synopsis by the Author This book is an overview of the development of aerobic waste water treatment and influences which shaped this development. The historical development of sewage treatment and the subsequent emergence of aerobic biological treatment methods is investigated from the early nineteenth century to the present day. In addition, the earlier historical background, up to the ...
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Contamination of groundwater and the risk to human health
Groundwater is a major source of drinking water in many parts of the world. In industrialised countries, there is increasing concern that groundwater reserves are being contaminated by industrial effluents and the chemical pesticides and fertilizers used in intensive farming. This paper compares some of the existing guidelines for acceptable concentrations of certain common contaminants in ...
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Physical, chemical, bacteriological and radioisotopic parameters from springs and wells around Jocotitlan volcano, Mexico
Samples from seven springs and two wells around Jocotitlan volcano (Mexico), mainly used as drinking water supplies, were studied for physical, chemical, bacteriological and radioisotopic parameters. The temperature of the majority of the water was 5°C higher than the average atmospheric temperature of the zone, indicating a geothermal potential. The water type was bicarbonated mixed, related to ...
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Status and prospects of nuclear desalination
Recent statistics show that currently 2.3 billion people live in water-stressed areas and among them 1.7 billion live in water-scarce areas. In the light of this, the Millennium Declaration by the UN General Assembly in 2000 has set up a target to halve, by the year 2015, the world population who are unable to reach, or to afford, safe drinking water. Better water conservation, water management, ...
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Impact and extent of ground water pollution: a case study of rural area in Punjab State (India)
Pollution has affected not only the natural resources of the planet but ground water also. Present paper is emphasised on study to assess the drinking water quality and its impacts on human health in the rural area of a region in Punjab (India). Samples of ground water from five villages have been tested and it has been found that 65% of samples have excessive fluoride, 100% have excessive ...
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Waterborne diseases in the state of Mexico, Mexico (2000-2005)
This paper reports a spatial-temporal examination of waterborne disease data from the State of Mexico, 2000 to 2005, by county as the spatial unit. It was found that the incidence of waterborne disease did not decrease during the period under study. Inequality between metropolitan areas and rural zones was observed. People living in population centres had lower incidence of water-related ...
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E-waste Recycling- Compliance or Necessity
The era of unorganised recycling of e-waste “formally” ended on 30th April, 2012 in India. With the rise of sun of 1st May, 2012, India joined the club of advanced countries committed for organised recycling of electronic waste. Concerns associated with unorganised recycling: I would like to first of all thank Kabadies (a commonly used terminology in India for the unorganised ...
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