aquatic science Articles

  • The 'whole-effluent' toxicity approach

    The identification and quantification of effluent toxicity plays an important role in the evaluation of harmful impacts on the aquatic environment. The aim of this study was to demonstrate the advantages of using the 'whole-effluent' toxicity approach compared to prediction of toxicity using key toxic compounds. An underestimation of 'whole-effluent' toxicity was always observed using bacteria, ...


    By Inderscience Publishers

  • Office of wetlands, oceans and watersheds 2007 annual report

    OWOW is one of five offices in the Office of Water at EPA Headquarters in Washington, D.C. The office provides leadership, policy direction, and financial support to our 10 regional offices and to the states, tribes, and territories that implement our programs. We also work collaboratively with other federal agencies, as well as local governments, the private sector, and nonprofit organizations ...

  • An assessment and perception of the hazards of pesticide use in the aquatic environment

    Various models are available to help assess the risk of chemicals to the aquatic environment. The hazard posed by pesticides in use in Prince Edward Island, Canada was estimated by a model based on fugacity. Groups of individuals currently working in the field of aquatic toxicology were asked to rank 20 of these pesticides in order of decreasing hazard. There is little agreement between ...


    By Inderscience Publishers

  • Extraction of Sediment using the SpeedExtractor E-916 for the determination of Polychlorinated Biphenyls (PCBs)

    PCBs were used as coolants and dielectric fluid in transformers, as flame retardants, hydraulic fluids and additives in plastics and for many other applications until the 1980s. They are toxic, persistent and bioaccumulate in terrestial and aquatic biosystems and due to atmospheric effects they are ubiquitous in the environment. Sediment samples from a round robin program (SETOC 2008/4, Wepal, ...


    By BÜCHI Labortechnik AG

  • Alternative Techniques to Increase the Dechlorination Kinetics of Organic Chloramines

     ABSTRACT Organic chloramines are a potential source of aquatic toxicity. Destruction of organic chloramines by dechlorination with sulfur dioxide is possible. However, the reaction proceeds slowly. The goal of this study was to investigate reaction enhancements to accelerate the dechlorination of organic chloramines. The dechlorination enhancements investigated were 1. Aeration mixing, ...

  • Ultraviolet radiation shapes seaweed communities

    Stratospheric ozone depletion and the concomitant increase in irradiance of ultraviolet-B radiation (UVB) at the earth’s surface represent major threats to terrestrial and aquatic ecosystems. In costal rocky shore environments, seaweedsconstitute a group of organisms of particular significance to ecosystem function. Thus, impairment of seaweed performance by UVB-exposure may result in severe ...


    By Springer

  • Ionex- Versatile ion exchange technology for Nitrate removal

    Belgian separations technology company PuriTech (www.puritech.be) has designed an ion exchange system that improves liquid–resin contact efficiency while reducing plant operating costs and capital expenditure. Targeted at a broad range of industries, one area where the system is now showing its strength is in the removal of nitrates from drinking water, asPuriTech's Filip ...


    By PuriTech Ltd

  • Monitoring Ozone (in the air) in Hatchery & Fish Farm Ozone Injection Systems

    Hatcheries, fish farms and such in the aquaculture industry require clean water to maintain a high survival rate while rearing aquatic animals. Contaminated water increases the risk of infection which in turn can compromise production. A common way to disinfect water is by generating ozone on-site with an ozone generator, which is commonly inside an ozone generator room. For human safety, ...

  • FAQs on micropollutants in natural waters

    Micropollutants and their transformation products are being increasingly detected in Swiss waters. This is attributable partly to ever more powerful analytical methods, but also to a steady rise in the use of man-made substances. Public awareness of this issue has been heightened in particular by the findings of research on endocrine disruptors – e.g. the feminization of male fish due to ...


    By IWA Publishing

  • Korea : Olympic sized clean up - Case Study

    AIRE-O2® aerators breathed fresh life into the Suyong River and Pusan Harbor Yacht basin, reversing the damage of years of heavy industrial pollution in its upper reaches. Korean officials chose the AIRE-O2® system to improve water quality for the 1988 Olympic Yacht Races due to the aerator’s capabilty to aerate and mix the brackish waters of this vast project. Within days of ...

  • A new reactor for denitrification and micro-particle removal in recirculated aquaculture systems

    A ‘membrane-denitrification’ reactor (MDR) was developed and tested in a semi-technical recirculation aquaculture system in comparison to a double – without MDR – as reference system. The MDR consisted of a reactor with an ultrafiltration membrane unit for removal of micro-particles (e.g. sludge flocs, bacteria and parasites). Specific carrier material provided surfaces for biofilm growth in a ...


    By IWA Publishing

  • Distribution behaviour of trace and toxic metals in soil and sediments along the Thane Creek near Mumbai, India

    The long biological half lives, non-bio-degradable nature and accumulative properties of trace and toxic heavy metals in aquatic environment has attracted great attention of environmental scientists and ecologist in recent years. Therefore, in the present investigation, we have selected Kalwa Bridge and Balkum sites along the Thane Creek to investigate pollution load due to trace and toxic heavy ...


    By Inderscience Publishers

  • Investigation of the use of TiO2 doped with metal ions in water disinfection

    This research was conducted to improve titanium dioxide by transition metal doping using cooper. Sol gel method was used to prepare metal doped TiO2. Titanium isopropoxide and commercial TiO2 P25 were employed as catalyst precursor. The role played by the varied preparation parameters such as doping level and pH of solution discussed with respect to the final photoreactivity. Photoreactivity was ...


    By IWA Publishing

  • The application of a drought reconstruction in water resource management

    This study uses extended (1880s–2012) rainfall series to examine the implications of historical droughts on water supply yield calculations used in water resource management and drought planning across the English Midlands and Central Wales. UK guidance to water companies is to use climate data from the 1920s to present where possible in modelling to inform water resource management and ...


    By IWA Publishing

  • Fecal pollution source tracking in waters intended for human supply based on archaeal and bacterial genetic markers

    The determination of fecal pollution sources in aquatic ecosystems is essential to estimate associated health risks. In this study, we evaluate eight microbial source tracking (MST) markers including host-specific Bacteroidales and Methanobrevibacter spp. for discrimination between human, bovine, equine, and swine fecal contamination in waters intended for human supply. ...


    By IWA Publishing

  • A brief review on pollution and ecotoxicologic effects on Sundarbans mangrove ecosystem in Bangladesh

    The natural ecosystem of the Sundarbans mangrove wetlands is under threat due to anthropogenic activities. This ecosystem has become vulnerable to pollution such as oil spillage, heavy metals, and agrochemicals – which may have changed the mangrove ecosystem's biogeochemistry. In this paper, the present status of Sundarbans' mangrove pollution is reviewed. The ecotoxicologic effect on its aquatic ...


    By Inderscience Publishers

  • Landscape limnology

    Landscape limnology is the spatially-explicit study of lakes, streams, and wetlands as they interact with the freshwater, terrestrial, and human landscapes to determine the effects of pattern on ecosystem processes across temporal and spatial scales. The terrestrial component represents spatial hierarchies of landscape features that influence what materials, whether ...


    By IWA Publishing

  • Removal of reactofix supra red HBSL from industrial effluent using electrochemical and adsorption techniques

    Many industries use dyes and pigments to colour their products. The largest customers of these dyes are textile, tannery, paper and pulp, pharmaceuticals, cosmetics, food processing units and they are in turn the most serious polluters of our environment. The proper treatment of aqueous wastes is fundamental for the preservation of environmental equilibria and the quality of aquatic systems. ...


    By Inderscience Publishers

  • MIOX offers another sanitizing alternative

    It was with great interest that I read your article titled “Drinking It In”(February 2007). The story specifically mentions filtrations and UV as two examples of water technologies used in the aquatics business. I would like to bring to your readers’ attention another promising technology that got its start in the municipal water market. Chlorine-based mixed oxidants originally were developed for ...

  • Pathogen removal from domestic and swine wastewater by experimental constructed wetlands

    This study examined the performance of subsurface flow horizontal wetlands in total coliforms, faecal coliforms, enterococci and Salmonella removal from swine and domestic wastewaters. The effects of organic loading rate, contact time (CT) and the presence of aquatic macrophytes, Typha dominguensis and Typha latifolia, on treatment performance were ...


    By IWA Publishing

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