water pesticide Articles
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Distillation treatment and removal of contaminants from drinking water
Distillation treatment typically removes most of the dissolved materials. In addition, the boiling process kills biological contaminants. Nevertheless, there are certain volatile and semi-volatile organic compounds that may not be removed by distillation (CDPH 2009). Organic compounds that boil at temperatures greater than the boiling point of water (some pesticides) can be effectively removed ...
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Photo-Fenton degradation of alachlor, atrazine, chlorfenvinphos, diuron, isoproturon and pentachlorophenol at solar pilot plant
Homogeneous photocatalysis by photo-Fenton processes has been applied to the degradation of six water-soluble pesticides (alachlor, atrazine, chlorfenvinphos, diuron, isoproturon and pentachlorophenol), considered priority substances by the European Union Water Framework Directive (Directive 2000/60/EC). All tests were performed in a 35-L solar pilot plant with compound parabolic collectors ...
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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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Presence of persistent organochlorine pesticides in estuaries of the subtropical Mexican Pacific
A set of 40 samples of sediments and shrimps (Litopenaeus spp.) from two estuaries in the subtropical Mexican Pacific (San Blas, Nayarit) was analysed to determine the levels of organochlorine pesticides (OCPs). These pesticides have been widely used and dispersed in the study area, either for agriculture crops or control of malaria. For sediments of both estuaries (Pozo-Rey and San Cristobal), ...
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A coupled stochastic/deterministic model to estimate the evolution of the risk of water contamination by pesticides across Canada
Periodic assessments of the risk of water contamination by pesticides help decision makers to improve the sustainability of agricultural management practices. In Canada, when evaluating the risk of water contamination by pesticides, there are two main constraints. First, because the area of interest is large, a pesticide transport model with low computational running time is mandatory. Second, ...
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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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Remediation of simazine from water through low-pressure thin film composite membrane using surfactants
The investigation was carried out to remediate simazine from water by the pressure driven filtration techniques (viz. nanofiltration, reverse osmosis). The separation of simazine through the membranes showed similar trend as glucose (organic marker) and salt. Surfactant-mediated filtration showed better performance of the membranes, though it depends on the nature of membranes and surfactants. ...
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GC-MS/MS Analysis of Pesticides in Drinking Water
According to Japan’s list of drinking water quality control substances, pesticides are included as supplemental items subject to analysis. Designed to complement the standards, the Ministry of Health, Labour and Welfare encourages water utilities to monitor pesticide levels and achieve specified targets. Among the 102 listed pesticides, 84 are simultaneously analyzed using solid-phase ...
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Understanding the role of soil testing in modern agriculture
A bit of a background The increase of food production across the years has been mainly due to higher yields resulting from greater inputs like fertilizers, water, pesticides, and other technologies of the “green revolution”. But even if those practices led to enormous gains in food and helped improve food security, they also had greater negative impacts on the environment, putting the ...
By SOILCARES
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Analysis of pesticide residues in drinking water samples using solid-phase micro-extraction (SPME) coupled to a gas chromatography-electron-capture detector (GC-ECD)
The headspace solid-phase micro-extraction (HS-SPME) method with polydimethylsiloxane (PDMS, 100 μm) fiber is a cost-effective technique for the determination of different pesticide residues in environmental and biological samples followed by a gas chromatography-electron-capture detector (GC-ECD). In the present study more than 147 water samples collected in and around Lucknow city were ...
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Effect of agro-activities on drinking-water quality in Bangladesh
Fifty-nine samples of drinking water were collected from various locations in Bangladesh to assess the impact of agricultural practices on groundwater quality. The basic groundwater quality parameters, such as pH, total dissolved solids, iron, sodium, chloride, sulfate, fluoride and arsenic were analysed. In addition, the presence of excess fertilizers was monitored by measuring levels of ...
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Nanosensors applied to water quality: developing a low-cost pH sensor for natural water, and application of other techniques
A low-cost optical sensor built-in strip has been developed from a composite obtained with application of in-situ chemical polymerisation, using polyaniline in the emeraldine oxidation state, doped with HCl onto poly(ethylene terephthalate) (PET) film, used to measured the pH of water. The absorption of UV-Vis spectra was used to evaluate the optical response to pH change of natural water. The ...
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Efficiency of conventional drinking water treatment process in the removal of endosulfan, ethylenethiourea, and 1,2,4-triazole
The aim of this work was to study the removal of three pesticides using conventional drinking water treatment (DWT) processes. These methods are the most used in Brazil, and include coagulation–flocculation of water. The pesticides/metabolites evaluated were: endosulfan, ethylenethiourea (ETU), and 1,2,4-triazole. The laboratory tests were carried out in triplicate using the jar test. ...
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Development of Helisoma trivolvis pond snails as biological samplers for biomonitoring of current‐use pesticides
Non‐target aquatic organisms residing in wetlands are commonly exposed to current‐use pesticides through spray drift and runoff. However, it is frequently challenging to measure exposure due to rapid dissipation of pesticides from water and reduced bioavailability. Our hypothesis is that freshwater snails can serve as bioindicators of pesticide exposure based on their capacity to passively ...
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Pyrethroid and organophosphate pesticide‐associated toxicity in two coastal watersheds (California, USA)
Portions of the Santa Maria River and Oso Flaco Creek watersheds in central California, USA, are listed as impaired, under section 303(d) of the Clean Water Act, and require development of total maximum daily load (TMDL) allocations. These listings are for general pesticide contamination, but are largely based on historic monitoring of sediment and fish tissue samples that showed contamination by ...
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Pesticide multiresidues in waters of the lower fraser valley, British Columbia, Canada. Part II. Groundwater
Received for publication October 3, 2007. In Part I of this work we presented pesticide levels in the surface waters of the Lower Fraser Valley (LFV) region of British Columbia, Canada. In Part II pesticide levels in the groundwater of the LFV are presented. During the period 2003 to 2005 a study was conducted to determine the occurrence and spatial distribution of 78 pesticides in the ...
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Evaluation of the AutoMate-Q40 for Organochlorine Pesticides in Water
Introduction Organochlorine Pesticides (OCPs) are a group of persistent organic pollutants (POPs). In which most of these have been prohibited from use. OCPs are grouped into three group’s dichlorodipheny ethane (DDT, DDD, and DDE), cyclodiene (aldrin, dieldrin, heptachlor and endosulfan) and chlorocyclohexane (α, β, γ and δ-HCH). The QuEChERS extraction method is ...
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Analysis of atrazine and its degradation products in loamy soil by SPE and HPLC
The degradation and leaching of atrazine and its degradation products (hydroxyatrazine, desethylatrazine, deisopropylatarzine and didealkylatrazine) were studied into loamy soil. An agriculture soil field (50 × 50 sq. feet with brinjal plants) was selected and atrazine spray was carried out once in a year. The irrigation of this plot was carried out once in a month. The sampling of soil was ...
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The interaction between natural organic matter in raw waters and pesticide residues: a three dimensional excitation–emission matrix (3DEEM) fluorescence investigation
This paper examines the interaction between dissolved natural organic matter and pesticide residues, both of which are found in raw water sources, using three dimensional excitation–emission matrix (3DEEM) fluorescence spectroscopy. It was observed that pesticide residue at 0.1 mg L−1 formed a complex with humic-like fluorophores that are commonly found in raw water samples. ...
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James V. Aidala Comments in BNA Daily Environment Report Regarding Trump Transition at EPA
The November 14, 2016 BNA Daily Environment Report featured comments from James V. Aidala, Senior Government Affairs Consultant for Bergeson & Campbell, P.C., in the story “Trump Transition Team Expected Soon at EPA To Begin Review of Agency Actions, Priorities”: Trump’s EPA transition team will likely receive ‘‘massive briefing books’’ on each of ...
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