surface water Articles
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Toxicity Screening of Surface Waters in Southern Italy with Toxkit Microbiotests
Abstract : This preliminary study reports on the toxicity of surface waters collected twice in 1997 (once in late spring and once in late autumn) at 19 sampling stations in 5 areas (Domitian, Flegrean, Regi Lagni, Vesuvian and Coast area) in the Province of Naples in Italy. The acute toxicity of the surface waters was determined with a battery composed of 4 microbiotests : the Algaltoxkit ...
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From Microbiotest to Decision Support System : an Assessment Framework for Surface Water Toxicity
Abstract : A decision framework for the site-specific detection of toxic effects of contaminants in surface waters is presented. Although the main objective of the development of this framework aimed at supporting water quality boards in their studies on polluted waters and sediments, it could also be of wider use. The decision framework is illustrated by means of a case study on a ditch that is ...
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Quick start-up of membrane bioreactor for treating micro-polluted surface water under low temperature
This paper proposed an enhancement start-up strategy for accelerating the start-up of a membrane bioreactor (MBR) for treating micro-polluted surface water under low temperature. The surface water ammonia oxidizing bacteria (AOB) and nitrite oxidizing bacteria (NOB) were firstly enriched in a culture apparatus, and they were further acclimated to surface water through an MBR. Then the prepared ...
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Nitrogen removal in micro-polluted surface water by the combined process of bio-filter and ecological gravel bed
Nitrogen removal in micro-polluted surface water by the combined process of a bio-filter and an ecological gravel bed was studied. Sodium acetate was added into micro-polluted surface water as carbon source and the nitrogen removal under different C/N ratio, hydraulic load and temperature were investigated. The results showed that the variations in C/N ratio, hydraulic load and temperature have ...
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Assessment of water quality observation stations using cluster analysis and ordinal logistic regression technique
Variations in the surface water quality parameters of the observation stations have been investigated using cluster analysis and the ordinal logistic regression technique. Ordinal logistic regression analysis results showed that nitrite, ammonium and total phosphorus were identified as the parameters that displayed essential variations. These results were supported by the cluster analysis. The ...
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Transfer and translocation of organochlorine pesticide residues in an agricultural area of Romania
The study refers to translocation of some organochlorine persistent pesticides (Lindane, Aldrin, Endosulphane and DDT) in/from soil to surface and underground water and their accumulation in some crops in an agricultural area nearby Bucharest. The samples analysed were soil, surface water (Arges River) and underground water (wells). Pesticide residues were found especially in soil samples, in ...
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Microbiological pollution of surface water in the upper–middle basin of the Reconquista river (Argentina): 2010–2011 monitoring
A microbiological monitoring was conducted on the water at six locations of the Reconquista river, a polluted peri–urban water body of Argentina. Samples were taken from surface water of three tributary streams in the dam outlet and 18 km downstream; samples from the sediments of one of the streams were also taken. For all samples the presence and quantity of coliform bacteria (total ...
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A comparative study of single factor and multivariate statistical methods for surface water quality assessment
Water quality assessment is an essential part of water resources management. Different methods, including the single factor (SF) method and multivariate analysis, employed in assessing water quality can give different results. In this study, SF methods and multivariate analysis – including discriminant analysis (DA) and the distance function model (DFM) – were used to assess the ...
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Estimation of dry deposition of atmospheric nitrogen to coastal waters of de la Plata River in front of Buenos Aires city
The deposition of atmospheric nitrogen (N) to surface waters of de la Plata River downwind of Buenos Aires city has been estimated using atmospheric dispersion-deposition models. The CALPUFF model has been applied to point source emissions and the DAUMOD-RD model has been developed to evaluate the area source emission contributions. Annual N dry deposition is 31,763 kg-N yr−1 (≈ 18 kg-N km−2 ...
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Partitioning and availability of sediment-bound metals following final sewage effluent release to a lowland river
A simple partitioning scheme was used to assess the partitioning and behaviour of copper, cadmium, iron, lead and manganese within the surface waters and sediments of the River Yare, Norfolk, UK, following the discharge of final effluent to the water course from municipal sewage treatment works (STW). Sewage effluent discharges were shown to increase metal concentrations and complexation ...
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Bank filtration as managed surface-groundwater interaction
Riverbank Filtration (RBF) is a managed surface-groundwater interaction process where surface water is induced to flow to pumping wells installed on the banks of rivers and lakes. We present the surface-groundwater interaction issues at various geomorphologic settings, from the headwaters of a river to its confluence with the oceans/lakes. In each reach, the factors for the sustainable operation ...
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Evaluation of mutagenic activity of organic micropollutants present in surface waters
Surface water to be employed in drinking water supplies can be characterised both by chemical analysis and mutagenic activity in order to detect genotoxic compounds present as environmental pollutants or produced by drinking water treatments. In our experimental conditions, only two samples out of seven raw and four processed water extracts (Amberlite XAD-2 concentration) gave mutagenic effects ...
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Screening of pharmaceuticals in surface water bodies of the Pampas region of Argentina
Pharmaceuticals have been included among emerging pollutants due to their continuous input in aquatic environments by wastewater discharges. The aim of the present study was detecting and analysing concentration levels of five commonly used pharmaceuticals in surface water bodies of the Pampas region of Argentina. Analyses were done on the soluble fraction by liquid chromatography with mass ...
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Vegetated ditches for treatment of surface water with highly fluctuating water regime
Vegetated drainage ditches (VDD) as a type of constructed wetland primarily serve to remove and store excess water associated with irrigation and storm events. Current research suggests using a VDD as an additional practice in the mitigation of surface water pollution. The VDD for water treatment of the Glinscica River was constructed in 2006. The efficiency of the system was evaluated in 2008 ...
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Microbiological water quality of the Nišava River
Microorganisms are the ideal indicators of the organic pollution of the surface waters because of their ability to promptly respond to environmental changes. Due to poor economic situation and lack of law implementation, most wastewaters in Serbia are released directly into a surface water recipient without any, or a limited, treatment. This practice has created numerous highly polluted ...
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Water quality improvement of industrial shrimp ponds
Agriculture has been one of the most major economic sources in Tien Giang province. Because waste generation from ISP process has not been completely controlled, it has affected the water quality seriously. Samples collected at three stages of shrimp ponds and surface water (rivers, canals) were assessed. The results showed that water quality in rivers and canals is contaminated by organic and ...
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Don’t Ignore Surface Water Runoff, Report Warns
When it comes to the UK’s water-related aspects of the climate crisis, there’s always a lot of talk about water pollution and shortages in supply, but there’s one topic that risks being left out of the discussion and that’s surface water flooding. This is something that a new report from the National Infrastructure Commission (NIC) seeks to address, an issue that is ...
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Optimisation of analytical method for estrogen in surface water and primary risk assessment in South Creek
A very non-polar sorbent, polystyrene-divinyl-benzene (brand: biobeads supplied by BioRad, with 30∼50 mesh) was tested for its extraction efficiency of four target compounds, estrone, estradiol, ethynylestradiol and estriol, from larger volumes (8 l) of water samples. To achieve adequate sensitivity of instrumental analysis by GC/MS, an improved estrogen derivatisation method was developed. For ...
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Economic analysis of alternative pollution abatement policies: the case of Buriganga River, Bangladesh
The Buriganga River is a prime example of serious surface water pollution problem. So far the emphasis of pollution abatement policy for this river has been solely on the application of command and control (CAC) mechanisms (standards on emission discharges), however little success has been achieved as the polluters seem to be reluctant to comply to these measures. This study evaluates the ...
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First decentralized wastewater treatment system in Lao PDR
Wastewater treatment as part of the sanitation system is an important environmental service that is closely linked to water management. The poor sanitation management in Lao PDR generally contributes to wastewater pollution especially in the urban areas. The major water source for urban supply is surface water since most towns are located along the rivers as groundwater ...
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