water chemistry measurement Articles

  • Cycle chemistry pH measurement

    pH measurement in high purity water has met with variable success. The high resistivity of pure water, the vulnerability to contamination, the variability of reference electrodes and additional temperature effects converge to make tins a particularly challenging measurement. Overcoming these obstacles requires a thorough understanding of the potential problems and their systematic solution. ...


    By SnowPure Water Technologies

  • Reverse osmosis water chemistry

    Alkalinity: Alkalinity is comprised primarily of carbon dioxide, bicarbonate, carbonate and hydroxides. Naturally occurring alkalinity is the earth’s natural buffering system in that small doses of strong acids (e.g. acid rain) react with alkalinity and result in relatively small changes in pH. Carbon dioxide and bicarbonate are in a balance between the pH range of 4.4 and 8.2. At a pH of 4.4 or ...

  • The productive environmental laboratory: BSK Labs boosts efficiency with Metrohm IC

    BSK Labs runs a number of environmental laboratories and service centers along the west coast of the US. A total of 70 employees – including microbiologists, chemists, lab technicians, and support staff – make sure that the 200 to 350 samples that come in every week are analyzed. BSK Labs specializes in potable water chemistry, ground water monitoring, storm water runoff, solid waste ...


    By Metrohm AG

  • The Presidential Green Chemistry Challenge: Celebrating 20 Years of Green Chemistry Innovation

    Bergeson & Campbell, P.C. (B&C®) and The Acta Group (Acta®) are deeply committed to supporting the development of greener, more sustainable chemical processes and products, and so we are pleased to help spread the news about a tremendous success story, featuring scientists from ...


    By Bergeson & Campbell, P.C.

  • A connection between cycle chemistry & condenser configuration

    Abstract The most important contributor to power plant chemistry upset conditions and to the overall plant thermal efficiency is the condenser. In-leakage into the subatmospheric pressure, or shell side, of this important balance-of-plant component is responsible for most system wide corrosion, loss of availability and loss of heat transfer in boiler tubes due to deposition of ...


    By Intek, Inc.

  • A connection between cycle chemistry and condenser configuration: part II

    Abstract Air in-leakage into the steam space of a condenser can become stored in pockets of high partial pressures that negatively impact condenser performance and become a source of dissolved gases in the feedwater. These pockets can be configuration caused and generally cannot be eliminated by reducing air ingress or increasing venting capacity. Fortunately, engineering designs are ...


    By Intek, Inc.

  • An integrated assessment of sediment remediation in a Midwestern U.S. stream using sediment chemistry, water quality, bioassessment, and fish biomarkers

    A comprehensive biological, sediment, and water quality study of the lower Little Scioto River near Marion, Ohio, USA, was undertaken to evaluate the changes or improvements in biotic measurements following the removal of creosote‐contaminated sediment. The study area covered 7.5 river miles (RMs), including a remediated section between RMs 6.0 and 6.8. Fish and macroinvertebrate assemblages, ...


    By John Wiley & Sons, Ltd.

  • Lead toxicity to Lemna minor predicted using a metal speciation chemistry approach

    In the present study, predictive measures for Pb toxicity and L. minor were developed from bioassays with 7 surface waters having varied chemistries (i.e., 0.5 to 12.5 mg/L dissolved organic carbon (DOC), pH 5.4 to 8.3 and water hardness 8 to 266 mg/L CaCO3). As expected based on water quality, 10, 20 and 50% inhibitory concentration (IC) values expressed as percent net root elongation (%NRE) ...


    By John Wiley & Sons, Ltd.

  • EPA And ACS GCI To announce 2015 winners of the presidential green chemistry challenge

    This year's Presidential Green Chemistry Challenge winners will be announced at the 20th Annual Presidential Green Chemistry Challenge Awards Ceremony, July 13, 2015, at the National Academy of Sciences in Washington, D.C. The Presidential Green Chemistry ...


    By Bergeson & Campbell, P.C.

  • Performance-Based Measurement Systems

    Many of the Environmental Protection Agency's (EPA's) methods used to monitor air, water and soil for environmental contaminants prescribe step-by-step details on how the chemical analysis must be conducted and prohibit any deviations or variations. The EPA has recognized that monitoring equipment and technology have improved tremendously over the last few years; that environmental media do not ...


    By WSP | Parsons Brinckerhoff

  • Integrated assessment of runoff from livestock farming operations: Analytical chemistry, in vitro bioassays, and in vivo fish exposures

    Animal waste from livestock farming operations (LFOs) can contain varying levels of natural and synthetic androgens and/or estrogens, which can contaminate surrounding waterways. In the present study, surface stream water was collected from six basins containing LFOs. Aqueous concentrations of 12 hormones were determined via chemical analyses. Relative androgenic and estrogenic activity was ...


    By John Wiley & Sons, Ltd.

  • In-line ASTM- and hazen-color measurement in refineries and chemical industry

    In many production processes of the chemical, petrochemical and pharmaceutical industry, color is an important parameter for the quality of the product or the production process. Might be the exact color value, might be the requirement of an ideally colorless product, might be the color range in a specific production step of a product. Examples are decoloration processes as in phthalic anhydride, ...


    By Sigrist-Photometer AG

  • Muddy waters

    Mark Zwinderman of Surface Active Solutions, looks at the dangers involved in the cleaning and maintenance of mud tanks and associated equipment The oil industry involves many thousands of people working daily in potentially hazardous circumstances with dangerous chemicals and sophisticated engineering equipment. There has been a consistent and determined drive by the industry to reduce the ...

  • Data Management and Visualization for Interim Measure Plan - Case Study

    Challenge Groundwater impact was discovered at the bedrock surface off-site and the client needed to quickly be able to access a long history of site data and develop a conceptual site model. Visually understanding where the impacted groundwater was in relation to property boundaries, surface water and stratigraphic features was critical for the client to determine next steps. ...


    By Antea Group - USA

  • Water Sustainability

    I7.1  | Water Optimization – 30% Groundwater Use Reduction Tabatha Pellerin, Senior Program Manager, AECOM AECOM assisted the Entergy Lewis Creek gas/coal fired electric power plant with water conservation efforts prompted by a goal of 30% ...

  • Chemical pollutants in water emerge

    Recent advances in contaminant identification methodologies, sampling instrumentation, and analytical chemistry have caused an explosion of knowledge about the presence of previously undetected organic micropollutants. While it doesn"t follow that the mere presence of chemical contaminants results in harm, public health experts, regulators, and others aren"t sitting idly by. Given the necessity ...


    By Bergeson & Campbell, P.C.

  • Understanding and Monitoring Hydrocarbons in Water

    Untitled Document 1. Introduction Oil contamination continues to be a very hot topic, due largely in part to recent catastrophic events with shipping ...


    By Arjay Engineering Ltd.

  • High fluoride drinking water in Gokwe, northwest Zimbabwe

    More than 200 million people worldwide are exposed to excessive fluoride in drinking water. According to the World Health Organization, the optimal concentration range of fluoride in drinking water is 0.5 to 1.5 mg/L. Above this range, populations may contract dental fluorosis or, in severe cases, crippling skeletal fluorosis. In the Gokwe area in NW Zimbabwe, where drinking water contains up ...


    By IWA Publishing

  • Oil Field Produce Waste Water Treatment

    Oily Waste Produce Water Treatment Oil Field Produce Waste Water Treatment Testing Produce Water Oil Field Production The oil industry has been ...


    By Integrated Engineers Inc.

  • "A Non-Chemical Water Treatment for Cooling Towers"

    Untitled Document Introduction This paper will describe a case study of a ...


    By Dolphin WaterCare

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