groundwater drinking water Articles
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Using Chemcatcher to help solve a pesticide puzzle - Case Study
The acid herbicide MCPA (4‐chloro‐2‐methylphenoxy acetic acid) is a relatively common pesticide used in agriculture and horticulture to control broadleaved weeds and rush. It has been detected in surface water, groundwater and drinking water worldwide. In fact, it is one of the most frequently encountered herbicides in water quality monitoring the US, Canada, Australia and much ...
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Spatio-temporal assessment of groundwater level and quality in urban coastal city Puri, India
Puri city is situated on the shoreline of Bay of Bengal and groundwater is the only source available to meet the city water supply mainly from two demarcated water fields. Due to the anthropogenic activities and absence of sewerage system, groundwater quality is deteriorating through open discharges of domestic waste, open defecation, septic tanks, soak pits, contaminated water pools, unorganized ...
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Validation of USEPA Method 524.2 Using a Stratum PTC, AQUATek 100 Autosampler, and Perkin-Elmer Clarus 600 GC/MS
Abstract The US EPA developed Method 524.2¹, “Measurement of Purgeable Organic Compounds in Water by Capillary Column Gas Chromatography/Mass Spectrometry”, for identifying and measuring purgeable volatile organic compounds (VOC) in surface water, groundwater, and drinking water. Due to the required sensitivity of this method, the use of purge and trap gas chromatography is ...
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Using Nitrogen Purge Gas for US EPA Drinking Water Methods
Abstract The USEPA developed Method 524.4, “Measurement of Purgeable Organic Compounds in Water by Capillary Column Gas Chromatography/Mass Spectrometry (Using Nitrogen Purge Gas)”, for identifying and measuring purgeable volatile organic compounds in surface water, groundwater, and drinking water. Due to the economic concerns associated with the cost of helium, this method allows for ...
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Validation of USEPA Method 524.2 Using a Stratum PTC, AQUATek 100 Autosampler, and Perkin-Elmer Clarus 600 GC/MS
Abstract The US EPA developed Method 524.2¹, “Measurement of Purgeable Organic Compounds in Water by Capillary Column Gas Chromatography/Mass Spectrometry”, for identifying and measuring purgeable volatile organic compounds (VOC) in surface water, groundwater, and drinking water. Due to the required sensitivity of this method, the use of purge and trap gas chromatography is ...
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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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Effects of aquifer thermal energy storage on groundwater quality and the consequences for drinking water production: a case study from the Netherlands
We used data from an aquifer thermal energy storage (ATES) system located 570 m from a public water supply well field in the south of the Netherlands to investigate the relation between production of renewable energy with an ATES system and the production of drinking water. The data show that the groundwater circulation by the ATES system can impact chemical groundwater quality by introducing ...
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Pharmaceuticals in the environment – global occurrences and perspectives
Pharmaceuticals are known to occur widely in the environment of industrialized countries. In developing countries more monitoring results have recently become available, but a concise picture of measured environmental concentrations (MECs) is still elusive. Through a comprehensive literature review of 1016 original publications and 150 review articles we collected MECs for human and veterinary ...
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Human health risk assessment of lead in drinking water: a case study from Port-au-Prince, Haiti
In Latin America and the Caribbean (LAC), human intoxication to lead is considered as an important public health issue. In Port-au-Prince, concentrations of lead ranging from 40 ?g/L to 90 ?g/L, greater than the threshold value (10 ?g/L) for drinking water, were measured in groundwater and drinking water. This study aims to assess human health risks generated by exposure to lead in the ...
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GLM and joint GLM techniques in hydrogeology: an illustration
In regression models with positive observations, estimation is often based on either the log–normal or the gamma model. Generalised linear models and joint generalised linear models are appropriate for analysing positive data with constant and non–constant variance, respectively. This article focuses on the use of these two techniques in hydrogeology. As an illustration, groundwater quality ...
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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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Characterization and comparison of iron oxyhydroxide precipitates from biotic and abiotic groundwater treatments
Removal of iron is an important step in groundwater treatment for drinking water production. It is performed to prevent organoleptic issues and clogging in water supply systems. Iron can be eliminated with a purely physico-chemical (abiotic) method or biotically with the help of iron-oxidizing bacteria (FeOB). Each of the purification methods requires different operating conditions and ...
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Rapid Groundwater Exploration - Case Study
A Vehicle-Mounted Solution Using CrossOver CO730 Customer’s task The Swedish Geological Survey (SGU) has been engaged in groundwater exploration projects to investigate Sweden’s many glacial river deposits. The deposits are spread across the country and are the most significant groundwater resources for drinking water supplies in Sweden. SGU wanted a GPR solution to deploy rapidly to ...
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Effect of agro-activities on drinking-water quality in Bangladesh
Fifty-nine samples of drinking water were collected from various locations in Bangladesh to assess the impact of agricultural practices on groundwater quality. The basic groundwater quality parameters, such as pH, total dissolved solids, iron, sodium, chloride, sulfate, fluoride and arsenic were analysed. In addition, the presence of excess fertilizers was monitored by measuring levels of ...
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The City Blueprint of Amsterdam: an assessment of integrated water resources management in the capital of the Netherlands
In this study the sustainability of integrated water resources management in Amsterdam has been reviewed using the City Blueprint approach. The City Blueprint® is a set of 24 dedicated indicators divided over eight categories, i.e., water security, water quality, drinking water, sanitation, infrastructure, climate robustness, biodiversity and attractiveness, and governance including ...
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The potential for health risks from intrusion of contaminants into the distribution system from pressure transients
The potential for public health risks associated with intrusion of contaminants into water supply distribution systems resulting from transient low or negative pressures is assessed. It is shown that transient pressure events occur in distribution systems; that during these negative pressure events pipeline leaks provide a potential portal for entry of groundwater into treated drinking water; and ...
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Homogeneous, heterogeneous and biological oxidation of iron(II) in rapid sand filtration
Homogeneous, heterogeneous and biological oxidation may precipitate iron(II) as iron(III) hydroxides. In this paper we evaluate the conditions under which each of these processes is dominant in rapid sand filtration (RSF). It is demonstrated that in the presence of iron(III) hydroxide precipitates homogeneous oxidation is negligible compared with heterogeneous oxidation. As soon as iron oxidizing ...
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Neptune project deliverable D5.2
Conclusion of the workshop about the revision of the WFD priority substances The list of priority substances chosen for the evaluation of the chemical status of water bodies as described in the water framework directive (WFD) will be revised in certain intervals (e.g. 4 years). The criteria of the revision procedure are under discussion. In the past a variety of different selection criteria were ...
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Testing of concrete to determine the effects on groundwater
The need for a more sustainable construction industry, as well as increasing pressures on landfill space, have led to an increasing use of recycled and secondary materials as aggregates in concrete1,2. However, if users are to have full confidence in these materials, it is important that they are shown to have neither an adverse impact on the properties of concrete, nor on the environment, ...
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Technology for treatment of groundwater simultaneously containing iron, manganese, ammonium and organic matter
The groundwater used as drinking water often contains unacceptable amounts of iron and manganese compounds and ammonium ions. These substances are efficiently removed using conventional technologies (aeration and filtration through granular media filters). However, the efficiency is drastically reduced for water containing considerable amounts of organic matter, which usually enters the water ...
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