surface contamination Articles

  • Occurrence of heavy metals and contaminants on the surface of adjacent rivers

    Water is fundamental to the survival of living beings. It registers every impact and can function as an indicator of environmental stressors. Our objective in the current study was to assess the sanitary conditions of the waters in the Açude, Maria Lucinda and Santa Rosa streams. This was done by checking pH, running quantitative analyses of heavy metals and testing for total coliforms. The ...


    By IWA Publishing

  • What`s Hiding in Your Waste Piles?

    In over 25 years in the grinding and recycling industry, we’ve learned that there’s always more than meets the eye in a pile of waste materials. Whether it’s a pile of pallets or household garbage, there’s some good and some bad hiding under the surface. It's there if you know how to find it. You can find it with the right industry knowledge, the right equipment, ...


    By Rotochopper, Inc.

  • Crumbling Concrete Water Networks Linked to Common Water Treatment Additive

    Concrete distribution and sewer networks are being corroded at an alarming rate partly because of a commonly used additive in the domestic drinking water and wastewater treatment process according to published reports in the journal Science. In countries throughout the world from industrialized nations like Australia and the USA to developing nations like Colombia, Ghana and the Philippines, the ...

  • UV Light Treatment for HVAC Systems

    Ultraviolet (UV) light can be applied to support numerous applications in a broad range of industries. In commercial paint spray booths and label manufacturing plants, UV lamps are used to streamline paint jobs and the printing of logos. Outside of such practices, the light source may also be utilized to eradicate harmful, disease-causing bacteria. Systems that rely on the light’s ability ...


    By Larson Electronics LLC

  • The rehabilitation of 43 year old waste lagoons

    In 1967 the City of Concordia, MO built a segmented lagoon system to handle the small town’s waste requirements. The main industry in Concordia is a Tyson renderings plant, and the lagoon system was designed to also handle that plant’s final waste and water polishing requirements. The lagoon system was a relatively standard design, consisting of an 18.7 acre primary lagoon, a 5.6 acre ...


    By Reliant Water Technologies

  • Surface Runoff

    Surface runoff is the water flow that occurs when soil is infiltrated to full capacity and excess water from rain, snowmelt, or other sources flows over the land. This is a major component of the hydrologic ...


    By IWA Publishing

  • Integrated assessment of climate change impact on surface runoff contamination by pesticides

    Pesticide transport by surface runoff depends on climate, agricultural practices, topography, soil characteristics, crop type, and pest phenology. To accurately assess the impact of climate change, these factors must be accounted for in a single framework by integrating their interaction and uncertainty. This paper presents the development and application of a framework to assess the impact of ...


    By John Wiley & Sons, Ltd.

  • Linking drugs of abuse in wastewater to contamination of surface and drinking water

    The concentrations of 17 drugs of abuse, including cocaine, several amphetamines, opioid drugs, and 2 metabolites—benzoylecgonine, a metabolite of cocaine, and 2‐ethylidene‐1,5‐dimethyl‐3,3‐diphenylpyrolidine, a metabolite of methadone—were investigated in an urban watershed that is heavily impacted by discharges of municipal wastewater. The artificial sweetener sucralose was also monitored as ...


    By John Wiley & Sons, Ltd.

  • Database analysis of US state regulatory guidance for organic surface soil contamination

    This manuscript describes a database of US state regulatory guidance values assembled to examine the guidance applied to the most commonly regulated surface soil contaminants. Guidance values were identified for 994 different contaminants, but there is considerable variability in the number of contaminants regulated by each state and in the values applied to contaminants. Guidance values for the ...


    By Inderscience Publishers

  • 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 ...


    By BritishFlora

  • Waste water: Skimming the surface

    A walk on the wild side gave the founder of a Calgary service company a new appreciation for clean water, indirectly laying the foundation for his own future. Years ago, while on the island of Borneo, Jason Snydmiller learned the super-major he was under contract to would promptly fine any contractor that left oil in local waters. Although it seemed harsh then, the rule was necessary, since ...


  • Surface Decontamination of Cyanide Compounds

    OBJECTIVE:  Determine the surface decontamination efficacy of DeconGel® 1101 on stainless steel, carbon steel, and concrete surfaces contaminated with potassium ferricyanide using ICP-OES (Inductively Coupled Plasma-Optical Emission Spectroscopy) following Environmental Protection Agency (EPA) SW-846 Methods 3005A (sampling) and 6010C (analysis). ...


    By KT Chemicals, Inc.

  • Cleaning mold containing surfaces

    Once a determination is made that a moldy surface can be cleaned instead of removed or demolished, what cleaning agents are effective in removing or killing the mold? Many factors influence the selection of a cleaning agent. 1). The type of surface to be cleaned: Is it porous? Hard such as cement or sheetrock? Soft, such as cloth, fabric or wallpaper? Absorbent and thick such as rugs, ...

  • Wastewater skimming the surface

    A walk on the wild side gave the founder of a Calgary service company a new appreciation for clean water, indirectly laying the foundation for his own future. Years ago, while on the island of Borneo, Jason Snydmiller learned the super-major he was under contract to would promptly fine any contractor that left oil in local waters. Although it seemed harsh then, the rule was necessary, since ...


  • Specifics on Surface area

    Surface area is an important property of solids with many industrial applications. Particle size is less influential on surface area than particle shape, texture, and porosity. Surface area calculated from particle size data should never be used independently. Isotherms are developed for materials to determine their behavior during gas adsorption under very cold temperatures. Characteristic ...


    By Particle Technology Labs

  • Mercury contamination of surface water and fish in a gold mining region (Cuyuni river basin, Venezuela)

    In the Cuyuni river basin (Venezuela), artisanal gold mining has caused significant mercury pollution due to extensive use of Hg in Au amalgamation processes. High Hg concentrations up to 4.60 ?g/l were recorded in surface water samples (rivers, streams, mining ponds, springs), which are three orders of magnitude higher than normal worldwide background values (0.003?0.005 ?g/l). Furthermore, Hg ...


    By Inderscience Publishers

  • Sub-surface flow wetlands to treat glycol-contaminated stormwater from aircraft de-icing operations, Batea

    Airports use glycol-based aircraft de-icing fluids (ADFs) for removing ice and snow from aircraft surfaces during winter and under frost conditions. Some relatively concentrated, spent ADF (Concentrate) may be collected from beneath aircraft for recycle or disposal at a local wastewater treatment plant (WWTP), but a significant part of the ADF at everyairport will end up in sewers and ditches, be ...

  • Liberating contaminants for easy recovery

    The number one challenge associated with most site remediation designs and methodologies is that 90-95 per cent of all environmental contaminants are present in an adsorbed phase onto soil and bedrock surfaces within both saturated and unsaturated zones. Contaminants, including hydrocarbons (LNAPL), chlorinates (DNAPL) and heavy metals, are sorbed onto the substrates and so have reduced mobility ...


    By Ivey International Inc.

  • Mineral oil contaminations in cardboard

    SpeedExtractor E-916: Optimization of pressurized solvent extraction (PSE) for the rapid and efficient determination of MOSH and MOAH in cardboard Many food samples are often contaminated with mineral oil coming from different sources. One possible source of contamination is the migration from cardboard packaging made of recycled fibres. ...


    By BÜCHI Labortechnik AG

  • Case study – condensate contamination

    Site: Natural Gas Wellhead Site (Colorado) Contaminant: BTEX (LNAPL/free product present) Soil Type: Well-sorted sand and gravel Injection Cost: $13,000 (material & labor): Size of Trenches: Approximately 5 feet by 55 feet No. of Trenches: 5 (4 at size above, 1 added in the field - ~5 feet by 21 feet Depth of Trench: ~7 feet below ground surface Goal: ...

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