nitrate concentration News

  • Nitrate concentrations of groundwater increasing in many areas of US

    Nitrate is the most common chemical contaminant in the world’s ground water, including in aquifers used for drinking-water supply. Nitrate in drinking water of the United States is regulated by the U.S. Environmental Protection Agency (USEPA) because of concerns related to infant health and possible cancer risks. Use of man-made synthetic fertilizers has steadily increased since World War II, ...

  • Des Moines struggling with nitrates in water

    Two rivers that supply water to 500,000 people in the Des Moines area show nitrate levels spiking to levels that make it unsafe for some to drink, a concentration experts haven't before seen in the fall that likely stems from especially wet weather in recent months. The utility that supplies Des Moines and most of its suburbs had workers blending river water with other sources to lower the ...


    By Associated Press

  • Models simulate nitrate dynamics in Garonne, Southwest France

    The over-enrichment of fresh, transitional, and marine waters with nitrogen (N) can lead to problems associated with eutrophication, such as a change in species composition of aquatic plants and nuisance algal blooms. In this context, dynamic models of flow and water quality are required to aid the implementation of the Water Framework Directive and to understand the impacts of environmental ...

  • No show stoppers for concentrating solar power

    A recently published study confirms that solar thermal power is largely unrestricted by materials availability. There are, however, some issues that the industry needs to look into soon, like replacing silver in mirrors. In the wake of Chinese export restrictions on rare earth metals, the dependence of some renewable technologies on scarce materials has gained attention. Several players in the ...


    By FLS Energy

  • Drinking water in Gaza Strip contaminated with high levels of nitrate

    Palestinian and German scientists have recommended to the authorities in the Gaza Strip that they take immediate measures to combat excessive nitrate levels in the drinking water. 90 per cent of their water samples were found to contain nitrate concentrations that were between two and eight times higher than the limit recommended by the World Health Organization (WHO), say the researchers from ...

  • ASTM D843 - 06(2011)e1 standard specification for nitration grade Xylene

    This specification covers nitration grade xylene. The nonaromatic hydrocarbons, acid wash color, copper corrosion, appearance, distillation range, initial distillation temperature, and dry point of nitration grade xylene shall be tested to meet the requirements prescribed. This abstract is a brief summary of the referenced standard. It is informational only ...


    By ASTM International

  • Aqwise developing advanced biological treatment system for drinking water nitrate contamination

    Aqwise, provider of advanced solutions for wastewater treatment, has signed a cooperation agreement with 'Mekorot', Israel's national water company, for field-testing an advanced biological treatment technology for Nitrate contamination in drinking water. The agreement was signed in the framework of WaTechTM, Mekorot’s entrepreneurship, investments and partnership center for water technologies. ...

  • ANDRITZ METALS wins prestigious Energy Globe Award for nitrate-free production of stainless steel

    International technology Group ANDRITZ has been awarded the Energy Globe Award, one of the world's most prestigious environment awards, for its environmental protection technologies PYROMARS and ZEMAP. The technologies developed by ANDRITZ enable a nitrate-free production of stainless steel. The PYROMARS technology was developed to recover the hydrofluoric and nitric acid, which is consumed ...


    By ANDRITZ AG

  • ASTM C799 - 12 Standard Test Methods for Chemical, Mass Spectrometric, Spectrochemical, Nuclear, and Radiochemical Analysis of Nuclear-Grade Uranyl Nitrate Solutions

    Uranyl nitrate solution is used as a feed material for conversion to the hexafluoride as well as for direct conversion to the oxide. In order to be suitable for this purpose, the material must meet certain criteria for uranium content, isotopic composition, acidity, radioactivity, and impurity content. These methods are designed to show whether a given material meets the specifications for these ...


    By ASTM International

  • Water pollution is decreasing but a lot remains to be done

    Water pollution caused by nitrates has decreased in Europe over the past two decades, but agricultural pressures are still putting water resources under strain. The latest Report on the implementation of the Nitrates Directive reveals that nitrates concentrations are slightly decreasing in both surface and groundwater and sustainable ...


    By Europa Press Room

  • Risks of biodiversity loss posed by nitrogen and phosphorus pollution in European freshwaters

    The risk of eutrophication as a result of nitrogen and phosphorus pollution in Europe’s freshwaters fell by 22% in lakes and by 38% in rivers between 1985 and 2011, new research has shown. The researchers analysed data across 88 European river basins using a new statistical approach which could be used to help identify factors which increase eutrophication risks. Nitrogen and phosphorus can ...

  • Gas analyser helps reveal NITRABAR success

    A portable FTIR multiparameter gas analyser from Quantitech is helping researchers at the University of Strathclyde to prove the efficacy of a novel technique ('NITRABAR' - an EC LIFE Environment Project) that helps remove nitrate pollution from groundwater. The NITRABAR system uses permeable reactive barrier technology and consists of a trench containing a mixture of natural materials, which ...


    By Quantitech Ltd

  • What the Fertilizer Industry Has Been Doing to Reduce Groundwater Pollution

    The fertilizer industry is very concerned and engaged in the issue of nitrate contamination in California's groundwater supplies, according to Richard Cornett, communications director for the Western Plant Health Association in Sacramento, a trade group that represents fertilizer companies, manufacturers and retailers. Regarding a recent UC Davis study on the issue, the fertilizer industry ...


  • Seeps important in watershed nitrogen retention

    Globally, the mobilization of nitrogen has increased significantly due to human activities, such as industrial and agricultural development. As a result, over the past decades, eutrophication in coastal ecosystems has increased. Watershed nitrogen retention is an important mechanism to decrease nitrogen loading to downstream water bodies. Generally, in the northeastern U.S., the amount of ...

  • Patent for Perchlorate Bioremediation Granted

    The US Patent Office has granted a patent for bioremediation of perchlorate-contaminated media to Michael Saul of CL Solutions, Cincinnati, Ohio and Andrew Irwin of Irwin Engineers, Natick, Massachusetts. The patent is based on the successful application of a novel approach to in situ bioremediation of nitrate and perchlorate in soil, ground water and sediments at a site in Massachusetts.   ...


    By CL Solutions, LLC

  • USGS report `contaminants in groundwater used for public supply` released

    The US Geological Survey (USGS) a unit of the Interior Department, has released a study of untreated water samples from 932 public wells across the nation.  Findings showed that naturally occurring contaminants, such as radon and arsenic, accounted for about three-quarters of contaminant concentrations greater than human-health benchmarks. Man-made contaminants were also found including ...

  • Capillary electrophoresis method according to EPA 6500 and ASTM D6508-10

    Lumex Instruments introduces a capillary electrophoresis method for determination of inorganic anions; fluoride, bromide, chloride, nitrite, nitrate, ortho-phosphate, and sulfate in drinking water, wastewater and ground water according to EPA 6500 and ASTM D6508-10 test methods. This test method is applicable for ...


    By Lumex Instruments Group

  • Wisconsin Clean Water and Renewable Energy RFP

    Gov. Scott Walker has requested the Wisconsin Public Service Commission (PSC), Department of Agriculture, Trade, and Consumer Protection (DATCP), and the Department of Natural Resources (DNR) to coordinate resources and draft a Request for Proposals that aligns digester technology to all sizes of dairy farms in environmentally sensitive areas of Wisconsin. ...


    By BioCycle Magazine

  • Photometry Compendium - Episode 6 is live!

    Besides the methods that use a chemical reaction to create a concentration dependant colour change, which can then be measured, there are many substances that can be measured without a colour reaction provided they absorb light within the wave length range of the photometer. To date, used exclusively in water treatment plants, a technique is available which is able to detect several parameters ...


    By WTW - a xylem brand

  • Study: Two major U.S. aquifers contaminated by natural uranium

    Nearly 2 million people throughout the Great Plains and California live above aquifer sites contaminated with natural uranium that is mobilized by human-contributed nitrate, according to a study from the University of Nebraska-Lincoln. Data from roughly 275,000 groundwater samples in the High Plains and Central Valley aquifers show that many Americans live less than two-thirds of a mile from ...

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