Environmental Processes Articles

  • Area monitoring of specific ppb-level constituents utilizing process gas chromatography

    ABSTRACT In most of the industrialized countries worldwide, increasingly stringent environmental regulations require the continuous reduction of a wide range of emission sources and components. Despite local variations concerning concentrations, absolute emission quantity, target priorities and timetables, regulations typically require active compliance and proof thereof. The impact of ...

  • Working with complexity: a participatory systems-based process for planning and evaluating rural water, sanitation and hygiene services

    Individuals working within the water, sanitation and hygiene for development (WASH) sector grapple daily with complex technical, social, economic, and environmental issues that often produce unexpected outcomes that are difficult to plan for and resolve. Here we propose a method we are calling the ‘Participatory Systems-based Planning and Evaluation Process’ (PS-PEP) that combines structural ...


    By IWA Publishing

  • NaA zeolite derived from blast furnace slag: its application for ammonium removal

    In this paper, high value added NaA zeolite material was prepared from blast furnace (BF) slag by hydrothermal method and its adsorption behavior on the removal of ammonium ion was investigated. It was found out that the synthetic NaA cubic zeolite with smaller crystal size obtained at nSiO2/nAl2O3 = 2 and nH2O/nNaOH = 20 showed better adsorption performance. The ...


    By IWA Publishing

  • Researchers: Current global groundwater recharge models inaccurate

    A large-scale analysis of existing water resource models used around the world has found some key processes are missing, which means estimates of water availability could be wrong and cannot be reliably used for making water management decisions. The international team of scientists found that important climate change impact models are wrong in some areas. One finding was that groundwater ...


    By Fluence Corporation

  • University Environmental Health & Safety Departments: Handling Compressed Nitrogen and Cryogenics

    An explosion at a university research lab in Hawaii last year highlights the dangers of working with compressed gas and the need for safety equipment on campus. Learn the dangers of working with compressed gas, how an oxygen deficiency monitor can help, and campus safety best practices.  Compressed Gas on Campus: Uses and Dangers Compressed gases including ...

  • Application of batch tests to assess antibiotic loads in anaerobic processes

    The presence of antibiotics in drinking water and wastewater has not been widely studied because the sanitary engineering sector mainly focuses on the removal of organic matter and nutrients. There is a lack of environmental regulations for pollutants like antibiotics. Batch tests analyse biodegradability to measure the anaerobic degradation potential of the substrate, or they can be used as ...


    By IWA Publishing

  • Environmental Beer Innovation

    Are Edible Pack Bindings the Solution? In 2016 the British population drank an average of 15,000 pints of beer every minute. Meanwhile in 2015, 63 billion gallons of beer was consumed in the USA, 50% of which was from a can. Whilst these statistics may have the beer companies and brewers smiling with glee, these are not good figures, ...


    By SHEilds Ltd

  • Scope Of A Environmental Site Assessment

    Environmental remediation can be a grueling process for commercial propery owenrs, especialliy if it's unexpected. Environmental remediation is often prompted by the results of an ESA (Environmental Site Assessment).  An ESA has become a standard component of many actions related to commerical property, such as purchasing the site, applying for a land-use permit, and more. ...


    By Grand Slam Construction

  • TSI dust monitors and Lufft weather sensors make a great team

    Both aerosols and wind speed and direction influence air quality significantly. This is why TSI Incorporated, a world leader in particle measurements, cooperates with Lufft USA in order to provide complete systems to measure PM2.5 (fine dust), PM10 (particles with a maximum diameter of 10 μm) as well as total PM levels. TSI Incorporated offers a variety of aerosol ...

  • Santa Cruz Meets THM/DBP Challenge with Unique Air Stripping Process - Case Study

    Summary Santa Cruz has successfully demonstrated an innovative way for the City to meet its water quality goals while using process recycled water as part of its supply source. Using the recycled water had caused concern about reliably meeting the U.S. EPA THM/DBP potable water quality standards in its finished water. The City evaluated various aeration treatment processes and chose an E-Z ...


    By QED Environmental Systems

  • Numerical routing of tracer concentrations in rivers with stagnant zones

    Modeling pollution transmission in rivers is an important subject in environmental engineering studies. Numerical approaches to modeling pollution transmission in rivers are useful tools for managing the water quality. The advection-dispersion equation is the governing equation in the transport of pollution in rivers. Recently, due to advances in fractional calculus in engineering modeling, ...


    By IWA Publishing

  • Modeling Tip: Importing & Exporting Traffic Data in CALRoads View

    The CALINE series of models was developed to estimate pollutant concentrations from motor vehicles at roadway intersections. It includes three primary models: CALINE, CAL3QHC, and CAL3QHCR. The latter allows processing of real meteorological data (up to one year) and input of vehicular emissions, traffic volume, and signalization (ETS) data. Data reflecting traffic conditions for individual hours ...


    By Lakes Environmental Software

  • Study shows online consumers want environmentally friendly options

    Reducing the carbon footprint of what we buy isn’t easy, but the opportunity for impact is substantial: In the United States, producing and delivering consumer purchases releases twice as much carbon into the atmosphere as home energy use and personal travel. By gathering and sharing information on carbon emissions associated with their products, companies can make environmentally friendly ...


    By Ensia

  • Studies on competitive adsorption of dyes onto carbon (XC-72) and regeneration of adsorbent

    Carbon as an adsorbent has been widely studied for wastewater treatment, but the regeneration of adsorbent has been scarcely reported. In this paper, an economical and environmental method was applied to regenerate carbon (XC-72). Results showed that both anhydrous ethanol and deionized water did not obtain optimal effect for the desorption of Acid Orange 7, Ponceau 2R and Rhodamine B, but the ...


    By IWA Publishing

  • Beliefs, Politics, and Environmental Policy

    Introduction Many of us who work on environmental issues have faced the challenge of conveying their importance to nonspecialists. Perhaps we have found ourselves defending the robustness of climate science to a contrarian uncle, or extolling the importance of biodiversity to a dubious aunt. Our relations and friends are often educated people, skilled in their own professions, who have ...


    By Oxford Journals

  • Electro-Fenton for control and removal of micropollutants – process optimization and energy efficiency

    The removal of micropollutants is an important environmental and health issue. Electro-Fenton offers an electrochemical advanced treatment that is particularly effective for the breakdown of aromatic contaminants. Due to the wide variety of chemicals, it is preferable to analyze model contaminants, such as phenol, when optimizing and assessing the efficacy of a novel treatment process. In this ...


    By IWA Publishing

  • Protoc TOC analyser installations at John Smith`s Brewery, Tadcaster

    The case study outlines the installation of Protoc TOC analysers at Heineken used for monitoring key effluent streams and proactively manage their site effluent. After ten years of continuous operation, the instruments are still performing reliably and are an integral part of the Company’s environmental compliance. The site has used the Protoc analysers to gain a better understanding of ...

  • Nutrient load concept-reservoir vs. bay impacts: a case study from a semi-arid watershed

    Large flow-through reservoirs and lakes possess environmental gradients and monitoring programs are mostly adapted for cost and time effectiveness. Bay areas are often more isolated from the main water body and are likely to have unobserved different environmental processes and impacts. This study was performed at the Itaparica Reservoir, São Francisco River, located in semi-arid Northeast ...


    By IWA Publishing

  • Interpreting unique colloidal response of TiO2 nanomaterials to controlled sonication for understanding of their assembly configuration in water

    It is important to determine the assembly configuration of engineered nanomaterials (ENMs) because assembly configuration influences their fate and transport behavior in the aquatic environment. Aggregated particles are more subject to segregation upon changes of environmental conditions (and vice versa) than agglomerated particles. As a strategic tool for investigating the time-resolved ...


    By IWA Publishing

  • Modeling Tip: How Parallel Processing can Expedite Large AERMOD Model Runs

    Due to advances in scientific knowledge, higher resolution raw data, stringent air quality standards, and changing regulations, environmental modeling is demanding more and more from EHS professionals and their computers. All of these influences have resulted in significantly longer AERMOD model run times as compared to the predecessor regulatory model, ISCST. Instead of minutes, AERMOD runtimes ...

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