nitrate analysis Articles

  • Characterization and source identification of stormwater runoff in tropical urban catchments

    The characteristics of urban stormwater pollution in the tropics are still poorly understood. This issue is crucial to the tropical environment because its rainfall and runoff generation processes are so different from temperate regions. In this regard, a stormwater monitoring program was carried out at three urban catchments (e.g. residential, commercial and industrial) in the southern part of ...


    By IWA Publishing

  • Area-differentiated modelling of excess nutrient and contaminant leaching risks at the river-basin scale using a hydrological approach in India

    Application of excess nutrients, such as fertilizers, is a significant and sometimes even major component of groundwater pollution. Diffuse inputs of nutrients and contaminants to the groundwater are related to runoff generated from precipitation on a catchment. This implies that the analysis of diffuse fluxes from the land surface to the groundwater requires an analysis of water fluxes for a ...


    By Inderscience Publishers

  • Nitrogen and carbon dynamics beneath on-site wastewater treatment systems in Pitt County, North Carolina

    On-site wastewater treatment systems (OWS) are a potentially significant non-point source of nutrients to groundwater and surface waters, and are extensively used in coastal North Carolina. The goal of this study was to determine the treatment efficiency of four OWS in reducing total dissolved nitrogen (TDN) and dissolved organic carbon (DOC) concentrations before discharge to groundwater and/or ...


    By IWA Publishing

  • Transboundary impact assessment of Indian dams: a case study of Chenab River Basin in perspective of Indus Water Treaty

    Several transboundary rivers are being shared in South Asia by neighbouring states within a certain framework. A comparative analysis of the Indus Water Treaty has been carried out with other South Asian water treaties while suggesting measures to enhance mutual cooperation over shared rivers between India and Pakistan. With a specific focus on Chenab River, transboundary impact assessments of ...


    By IWA Publishing

  • Spatio-temporal variations of water quality in Nova Ponte Reservoir, Araguari River Basin, Brazil

    Multivariate techniques, like cluster analysis (CA) and principal component analysis (PCA), were used to evaluate the spatial and temporal variability of surface water quality in a large neotropical hydroelectric reservoir (Nova Ponte Reservoir). The dataset, obtained during the period of 1995–2011 from the Energy Company of Minas Gerais State (CEMIG), contains 14 parameters surveyed quarterly ...


    By IWA Publishing

  • Knowledge-based planning of groundwater treatment trains for an efficient drinking water supply system in urban areas

    This paper presents knowledge-based planning of the most appropriate treatment schemes for drinking water supply (DWS) systems, jointly applying statistical tools and experimental tests. Milan City was chosen as the case study, its DWS system being composed of more than 20 DWS units, widespread in the urban area. First, multivariate statistical techniques (factor analysis and cluster analysis) ...


    By IWA Publishing

  • Optimization of cyanide extraction from wastewater using emulsion liquid membrane system by response surface methodology

    To solve the disposal problem of cyanide wastewater, removal of cyanide from wastewater using a water-in-oil emulsion type of emulsion liquid membrane (ELM) was studied in this work. Specifically, the effects of surfactant Span-80, carrier trioctylamine (TOA), stripping agent NaOH solution and the emulsion-to-external-phase-volume ratio on removal of cyanide were investigated. Removal of total ...


    By IWA Publishing

  • Nutrient removal from activated sludge mixed liquor by wastewater protozoa in a laboratory scale batch reactor

    The aim of the study was to investigate the nutrient removal rate of three wastewater protozoan isolates. The study was carried out in a laboratory-scale batch reactor for a period of 120 h. in a four batch study. Aliquot samples were withdrawn from the reactor every 24 h. for the analysis of phosphate, nitrate, nitrite, ...

  • State of well-water quality in Kakua Chiefdom, Sierra Leone

    Water is the difference between living and non-living and water for drinking should be pollutant free. Thus, in supplies for urban and rural consumption, water quality is one of the most critical parameters to verify. Well and/or open-water systems are easily liable to anthropogenic contaminations, the source of most water-borne epidemics especially in developing countries like Sierra Leone. ...


    By IWA Publishing

  • Nonpoint source of nutrients and herbicides associated with Sugarcane production and its impact on Louisiana coastal water quality

    A watershed analysis of nonpoint-source pollution associated with sugarcane (Saccharum officinarum L.) production was conducted. Runoff water samples following major rainfall events from two representative sugarcane fields (SC1 and SC2) were collected and analyzed. The impact of runoff on two receiving water bodies, St. James canal (SJC) and Bayou Chevreuil (BC) in a drainage basin (Baratarian ...

  • Novel catalytic and mechanistic studies on wastewater denitrification with hydrogen

    The present work reports up-to-date information regarding the reaction mechanism of the catalytic hydrogenation of nitrates in water media. In the present mechanistic study, an attempt is made, for the first time, to elucidate the crucial role of several catalysts and reaction parameters in the mechanism of the NO3−/H2 reaction. Steady-state isotopic transient kinetic ...


    By IWA Publishing

  • The public policies for reducing nonpoint water pollution between equity and efficiency

    This paper investigates if and how equity and efficiency could be reconciled when improving nitrogen-polluted groundwater of agricultural origin. This is achieved through comparing two pollution control programmes with respect to their costs, water quality impacts and correlation between abatement cost and polluting emissions. The fieldwork was done in a watershed, near the French Alps. It was ...


    By Inderscience Publishers

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