absorbent barrier Articles

  • Secondary Oil Containment at US Army Corps of Engineers - Big Bend Dam - Case Study

    Big Bend Dam takes its name from the unique bend in the Missouri River seven miles upstream from the dam. Construction of the dam began in 1959 and the embankment was completed in July 1963. Big Bend dam is 95 feet (29 m) high and 10,570 feet (3,220 m) in length. Power generation began at the facility in 1964 and the entire complex was completed by 1966. The hydroelectric plant generates ...


    By Albarrie Canada Limited

  • Sound field diffusivity at the top surface of schroeder diffuser barriers

    It has been shown in several studies that the T-shape profile barriers are one of the most successful noise barriers among many different profiles (May and Osman 1980; Hajek and Blaney 1984; Hothersall et al., 1991). In this case, it is shown by author (Monazzam and Lam, 2005) that in the same dimension, the T-shape profile has the highest performance compared to other profiled noise barriers. It ...


    By University of Tehran

  • Accurate and efficient prediction of acoustical performance of noise barriers against transport noise pollution

    An improved acoustical wave propagator (I_AWP) technique with high-order absorbing boundary technique is introduced to evaluate the acoustical wave interaction for noise barriers, providing the dual benefit of preserving high numerical accuracy (boundary conditions have been properly treated) and obtaining high computational efficiency (using a larger time step in the calculation). The aim is to ...


    By Inderscience Publishers

  • The impact of water flow configuration on crystallisation in LiBr/H2O absorption water heater

    Lithium Bromide (LiBr) strong solution entering the absorber tends to crystallise when the absorber temperature is increased for a fixed evaporating pressure. This is considered the key technical barrier for the development of a LiBr absorption heat pump water heater. There are several approaches to avoid the crystallisation problem, such as chemical crystallisation inhibitors, heat and mass ...


    By Inderscience Publishers

  • Cadmium regarded as the most serious contaminant of the modern age

    Abstract Cadmium is today regarded as the most serious contaminant of the modern age. It is absorbed by many plants and seacreatures and, because of its toxicity, presents a major problem for foodstuffs. Contamination through fertilisers becomes an increasing problem. Unlike lead, cadmium contamination cannot be removed from plants by washing them; it is distributed throughout the organism. It ...


    By Valahia University

  • Inorganic mercury accumulation in rice (Oryza sativa L.)

    To investigate the source and process of inorganic mercury (IHg) accumulation in rice, we monitored the concentrations of IHg in tissues of rice plants (Oryza sativa L.) from four experimental plantation plots. Biweekly during the rice‐growing season, tissues of rice plants, corresponding soil, precipitation, and irrigation water samples were collected. The sampling data support the following: ...


    By John Wiley & Sons, Ltd.

  • Using constructed wetland systems to remove solids from highly polluted river water

    The Erh-Ren River is located in southern Taiwan and is one of the most polluted rivers in Taiwan. A pilot-scale constructed wetlands (ERRCW) system containing a free surface flow wetland (FSF) followed by a subsurface flow wetland (SSF) was set up to treat the polluted river water. The system was designed to include solids removal. A removal efficiency of suspended solids (SS) in the ERRCW system ...


    By IWA Publishing

  • Decontamination of medical radioisotopes from hard surfaces using peelable polymer-based decontamination agents joint research project with CBI and Colorado State University

    Introduction Need for study: Contamination of treatment rooms Patient excretion Spills The efficacy of: 3 peelable decon agents removal of 3 medical isotopes from 2 surfaces Methods of Decontamination Absorbent pads and ...


    By KT Chemicals, Inc.

  • The no. 1 choice for improving the performance of soil and groundwater remediation

    Adsorption of Contamination The number one challenge associated with most site remediation designs and methodologies is that 90% to 95% of all environmental contaminants; including hydrocarbons (LNAPL), chlorinates (DNAPL), and heavy metals; are present in a sorbed (i.e., absorbed or adsorbed) phase onto soil and bedrock surfaces within both saturated and unsaturated zones. As such, the absorbed ...


    By Ivey International Inc.

  • Be Chemical Spill Ready

    The SDI Chemical Spill Kit, is a convenient laboratory spill kit with everything the emergency responder, EH&S professional, or employee who routinely uses chemicals, needs to neutralize, absorb, and render safe most small, routine chemical ...


    By Safety DImensions (SDI)

  • Reducing noise levels through engineering controls

      It"s fairly easy to control personal exposure to noise by limiting exposure time or using hearing protectors like ear plugs or ear muffs.  Engineering controls are usually applied to the machinery that produces noise. Imagine a 200 foot x 175 foot manufacturing facility with a 30 foot high ceiling.  In this building are a variety of cut-off saws, grinders, millers and other ...

  • Acoustiblok® Quiets Well Motor Noise for California Water District

    Acoustiblok recently resolved a noisy well motor issue that was affecting some nearby residents for Three Valleys Municipal Water District (Three Valleys MWD) in California. Ben Peralta, a Three Valleys MWD engineer working on the project said, “The new Acoustiblok All Weather Sound Panels perform better than the old ...


    By Acoustiblok International

  • Industry evolution and competence development: the imperatives of technological convergence

    This article examines the growing impact of technological convergence on the evolution of industry structure and the development of core competences, knowledge, and skill sets within firms. Technological convergence occurs when advances or innovations commercialised in one industry begin significantly to influence or change the nature of product development, competition, and value-creating ...


    By Inderscience Publishers

  • An examination of Taiwan's innovation policy measures and their effects

    Much greater emphasis is now being placed upon innovation in recognition that it plays an increasingly important role in enhancing industrial technology, thus the governments of many countries are currently adopting specific strategies aimed at stimulating innovation within firms. Taiwan is no exception; however, since the industrial structure of Taiwan comprises predominantly of small and medium ...


    By Inderscience Publishers

  • Foreign direct investment and spillovers of technology

    This paper summarises some of the literature on the links between FDI and the transfer and diffusion of technology. We argue that the positive effects of FDI postulated in much of the recent debate are not automatic, that the effects of FDI will vary depending on the host country's characteristics and policies, and that there is a role for economic policy in maximising the potential benefits of ...


    By Inderscience Publishers

  • Removal of algogenic organic matter by magnetic ion exchange resin pre-treatment and its effect on fouling in ultrafiltration

    Natural organic matter (NOM) fouling continues to be the major barrier to efficient application of ultrafiltration (UF) in drinking water treatment. Algogenic organic matter (AOM), the main contributor to total NOM levels in raw waters characterised by elevated algae levels, is currently the subject of much investigation. In this study, the effect of AOM on fouling of ultrafiltration and the ...


    By IWA Publishing

  • City Water International explains The Basics of Water Filtration

    The Basics of Water Filtration Most of us know that filtered water is healthier than tap water because of its purity, but how does water filtration work? The basic principle is that filtered water has passed through a filter which removes contaminants through one of several methods, depending on the type of filter. Most water purification systems work in one of three ways ­ by running water ...


    By City Water International

  • Case study - Filming sound leakages in highly reflective office environment

    Problem A newly built office complex is designed with glass facades between the offices and the hallway. The glass facades include a glass door. Although the glass structures themselves have a sufficient sound reduction value, the sound insulation between office and hallway was measured at 19 dB, which was far below the sound insulation criteria for offices given in the regulations. It ...


    By Norsonic AS

  • Mercury stabilization takes the sting out of mercury

    In elementary form, mercury is a danger to humans and the environment. But chemically bound to sulfur it loses its toxicity and can be disposed safely. The process which transforms the highly toxic metal into an unproblematic red powder is called mercury stabilization. As a specialist for cleaning mercury contaminated soil and waste by vacuum distillation econ also offers a process for mercury ...


    By econ industries GmbH

  • Using Coir Geotextiles for soil erosion control

    One of the most effective and yet natural soil erosion prevention techniques is the use of Coir Geotextiles fabrics ( Woven Geotextiles). Used extensively to prevent environmental degradation Geotextiles have no synthetic material but is instead made out of an organic fiber, coir, which is extracted from the husk of a coconut. It is strong, durable, water proof and is one of the few natural ...


    By CoirGreen

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