contaminated water Articles
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Contaminated Water
Treatment of Contaminated Mine Water Discharge Recent estimates have suggested that in the UK 2,500 km of streams and an area of 9,000 km2 of groundwater bodies are at risk of failure of Water Framework Directive Objectives due to mine water pollution (Jarvis & Rees 2004). For over two decades the Loughor Estuary in South Wales, which carries SSSI status, had been polluted by high iron ...
By BritishFlora
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Treatment of contaminated water with pesticides via adsorption
Static adsorption experiments of pesticides (alachlor, trifluralin and prometryn) on amberlite XAD-4 were carried out at pH 5. The effect of ionic strength (0.01–2 M) on the pesticides adsorption was also investigated. This effect is more pronounced for the adsorption of more polar molecules (alachlor and prometryn) compared to trifluralin adsorption. This phenomenon can be attributed to the ...
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Bioremediation of pollutant-contaminated water
Raw water resources in Kafr El-Sheikh Governorate are affected by many contaminants particularly during the winter season and low demand period of the Nile River, in which water level decreases and organic matter increases resulting in decreased dissolved oxygen, and increased ammonia, nitrite and bacterial load in the water. In this study, physicochemical and microbiological characteristics ...
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1,2-dichloroethane removal by Bruguiera gymnorrhiza (L.) Lamk and Pseudomonas putida BCC 23535
The purpose of this work was to investigate the ability of Bruguiera gymnorrhiza (L.) Lamk and Pseudomonas putida BCC 23535 to remove 1,2-dichloroethane (1,2-DCA) in contaminated water under hydroponic conditions. B. gymnorrhiza (L.) Lamk is a representative mangrove plant that can tolerate high levels of 1,2-DCA with a lethal dose 50 (LD50) of 34.67 mM. A concentration of 10 mM 1,2-DCA was ...
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Peroxidase-mediated polymerization of 1-naphthol: impact of solution pH and ionic strength
Received for publication September 24, 2008. Peroxidase-mediated oxidation has been proposed as a treatment method for naphthol-contaminated water. However, the impact of solution chemistry on naphthol polymerization and removal has not been documented. This research investigated the impact of pH and ionic strength on peroxidase-mediated removal of 1-naphthol in completely mixed batch reactors. ...
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US firm to clean Gomti
In an effort to clean Gomti along with other rivers of the state, an American company, 'Oil Spill Eater International Corporation, in association with Uttar Pradesh Jal Nigam, is conducting an experiment in a drain situated in front of Mankameshwar Temple on the banks of river Gomti. Company official Rajesh Pandey said, "The cost of cleaning in other countries is around 40 paise per litre and ...
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Arsenic removal from arsenic-contaminated water by biological arsenite oxidation and chemical ferrous iron oxidation using a down-flow hanging sponge reactor
The down-flow hanging sponge (DHS) reactor was used for continuous As removal treatment of As-contaminated water. The treatment scheme was: (1) As(III) in contaminated water is oxidized by arsenite-oxidizing bacteria fixed in the sponges in the reactor; (2) Fe(II) naturally existing in the water is oxidized by dissolved oxygen; (3) Fe(III) is precipitated as iron hydroxide and As(V) is ...
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Removal of heavy metals (Cr, Cd, Ni and Pb) using fresh water algae (Utricularia tenuissima, Utricularia tenuis & Zygogonium ericetorum) from contaminated water
A study was conducted to check the efficiency of different fresh water algae for removing heavy metals (Cr, Cd, Ni and Pb) from contaminated water. The three most abundant indigenous algal species namely Ulothrix tenuissima, Oscillatoria tenuis and Zygogonium ericetorum were collected from fresh water channels of Parachinar, Pakistan and brought to the laboratory of Soil and Environmental ...
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Photoinactivation of
Staphylococcus aureus andVibrio parahaemolyticus in the model aquatic microcosm: effect of light intensity and dissolved biodegradable organic compoundThe impact of light (1,000 × 100,000 lx) on the inactivation of S. aureus and V. parahaemolyticus has been assessed under different concentrations of dissolved biodegradable organic compound (BOC) at pH 7.0. First, a gradual decrease in the number of cultivable cells was observed. Secondly, a cell reactivation was observed and it was marked in the absence of BOC. In the absence of BOC, the lowest ...
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Copper(II) removal from aqueous solutions by adsorption on non-treated and chemically modified cactus fibres
The adsorption efficiency of a biomass by-product (cactus fibres) regarding the removal of copper(II) from aqueous solutions has been investigated before and after its chemical treatment. The chemical treatment of the biomass by-product included phosphorylation and MnO2-coating. The separation/removal efficiency has been studied as a function of pH, Cu(II) concentration, ionic strength, ...
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Hydrogenotrophic denitrification of drinking water using a hollow fibre membrane bioreactor
The objective of this research was to investigate the performance of a hollow fibre membrane bioreactor (HFMB) for hydrogenotrophic denitrification of contaminated drinking water. In the HFMB, H2 flows through the lumen of the hydrophobic hollow fibres and diffuses to an attached H2 oxidizing biofilm. Nitrate in the contaminated water serves as an electron acceptor. A hydrogenotrophic ...
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Phenanthrene removal from liquid medium with emphasis on production of biosurfactant
In the current study, there are some considerable issues which focused on: (1) the production of biosurfactant, (2) its correlation with the initial bacterial inoculum in the liquid phase and (3) its effect on polycyclic hydrocarbon (PAH) bioremediation performance. Therefore, two strains Pseudomonas facilis and Pseudomonas spp. were able to form a large clear zone diameter on the oil ...
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Water-based diseases
Waterborne diseases are caused by pathogenic microorganisms which are directly transmitted when contaminated fresh water is consumed. Contaminated fresh water, used in the preparation of food, can be the source of foodborne disease through consumption of the same microorganisms. According to the World Health Organization, diarrheal disease accounts for an estimated 4.1% of the total DALY ...
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Groundwater treatment - Dundee
Remediation of Hydrocarbon Contaminated Groundwaters Client: Stewart Milne Construction. Consultant: REC Ltd. Challenge: Removal and treatment of 31,000 litres of hydrocarbon contaminated ground water. Applied technology: Removal of contaminated waters to treatment centre. Remediation criteria: Remove ground water with a contamination in excess of 10 mg/kg. Validation: Ongoing monitoring by ...
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Common Treatment Technologies for Explosives in Ground Water, Surface Water, and Leachate
Explosives-contaminated process waste waters can be subdivided into two categories: red water, which comes strictly from the manufacture of TNT, and pink water, which includes any washwater associated with load, assemble, and pack (LAP) operations or with the demilitarization of munitions involving contact with finished explosive. Despite their names, red and pink water cannot be identified by ...
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Walkerton: requiem for the New Public Management in Ontario?
In May 2000, seven residents of Walkerton, Ontario, died, and hundreds more became seriously ill as a result of the contamination of the town's water supply. Immediately, residents and environmental activists pointed to the weakening of the province's environment ministry as the principal cause. Since coming to power in 1995, the Progressive Conservatives had taken steps to privatise and ...
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Outbreak of acute gastroenteritis due to a washwater-contaminated water supply, Switzerland, 2008
An operating error in a sewage treatment plant led to severe drinking water contamination in a well-defined district of a suburban municipality of Zurich, Switzerland. Despite the alert issued to the local population on the same day advising people not to consume the contaminated water, cases of acute gastroenteric diseases were subsequently observed. Considerable faecal contamination was ...
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UN: Europeans, North Americans Drinking Contaminated Water
Report points to decentralization as one way to equalize access to safe water With so much focus on the water woes of the Global South, the 2019 United Nations World Water Development report has shown that Europe and North America have work to do, too. According to the U.N.: Many citizens in Western and Central Europe, as well as in North America, also suffer from the lack of or inequitable ...
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HS-200 An economical solution for manufacturers
A medium sized manufacturer located in wester Michigan was visited by the local sanitary district inspectors. The purpose of the visit was to locate the source(s) of contamination that upset their biological treatment system. It was discovered that their compressor condensate contained approximately 35% by volume of free oil. Even though the amount of contaminated water was not enough to have ...
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Combination of hydrodechlorination and biodegradation for the abatement of chlorophenols
A method for abatement for chlorophenols (CPs) in contaminated water based on successive steps of catalytic hydrodechlorination (HDC) over Pd/C at ambient temperature and pressure, followed by aerobic biodegradation using yeast Candida tropicalis (C. tropicalis) was studied. The results showed that 4-chlorophenol (4-CP) and 2,4-dichlorophenol (2,4-DCP) could be easily and completely dechlorinated ...
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