Experimental approaches to studying the photostability of selected pesticides in water and soil

Mansour, M.; Feicht, E.A.; Behechti, A.; Scheunert, I.

doi:10.1016/s0045-6535(97)00137-9

Cited by 46 publications

(25 citation statements)

References 5 publications

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“…The abiological production of NPECs was believed to arise from the photo-(catalytical) oxidation of NPEOs, as many compounds present in natural waters can act as photosensitizers, such as humic acids, Fe(III)-aquo complexes and nitrates (Ahel et al, 1994d). These compounds can participate in photocatalytical reactions and have a strong oxidation ability toward organic pollutants (Fukushima & Tatsumi, 2001;Haag & Hoigne, 1985;Mansour et al, 1997;Zepp et al, 1985). The half-life of NP in lake water exposed to a mercury vapor lamp (intensity 10 times greater than natural sunlight) was approximately 45 min; in distilled water, its half-life was approximately five times longer.…”

Section: Factors Influencing Formation and Degradationmentioning

confidence: 99%

A Critical Review of the Formation of Mono- and Dicarboxylated Metabolic Intermediates of Alkylphenol Polyethoxylates during Wastewater Treatment and Their Environmental Significance

Chiu¹,

Paterakis

Cartmell

et al. 2010

Critical Reviews in Environmental Science and Technology

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Alkylphenoxyacetic acids, the metabolic biodegradation products of alkylphenol ethoxylates, are commonly found in wastewaters and sewage effluents. These persistent hydrophilic derivatives possess intrinsic estrogenic activity, which can mimic natural hormones. Their concentrations increase through the sewage treatment works as a result of biodegradation and biotransformation, and when discharged can disrupt endocrine function in fish. These acidic metabolites represent the dominant alkylphenolic compounds found in wastewater effluent and their presence is cause for concern as, potentially, through further biotransformation and biodegradation, they can act as sources of nonylphenol, which is toxic and estrogenic. The authors aim to assess the mechanisms of formation as well as elimination of alkylphenoxyacetic acids within conventional sewage treatment works with the emphasis on the activated sludge process. In addition, they evaluate the various factors influencing their degradation and formation in laboratory scale and full-scale systems. The environmental implications of these compounds are considered, as is the need for tertiary treatment processes for their removal.

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Section: Factors Influencing Formation and Degradationmentioning

confidence: 99%

A Critical Review of the Formation of Mono- and Dicarboxylated Metabolic Intermediates of Alkylphenol Polyethoxylates during Wastewater Treatment and Their Environmental Significance

Chiu¹,

Paterakis

Cartmell

et al. 2010

Critical Reviews in Environmental Science and Technology

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“…Most of these studies focused on byproduct formation during the photodegradation of parathion (Grounwell and Erickson 1973; Mansour et al, 1997; Sakellarides et al, 2003; Wu and Linden 2008) and chlorpyrifos (Walia et al, 1988; Barcelo et al, 1993). The degradation kinetics of both pesticides vary among studies as do reported quantum yields at 254nm for parathion [6×10 −4 (Mok et al, 1987) and 1.6×10 −3 M E −1 (Gal et al, 1992)] and for chlorpyrifos [0.016 (Wan et al, 1994) and 4.8×10 −3 M E −1 (Dilling et al, 1984)].…”

Section: Introductionmentioning

confidence: 99%

Phototransformation of selected organophosphorus pesticides: Roles of hydroxyl and carbonate radicals

Linden

2010

Water Research

157

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The phototransformation of two organophosphorus pesticides, parathion and chlorpyrifos, by hydroxyl radicals and carbonate radicals in aqueous solution were studied. The second-order rate constants of parathion and chlorpyrifos with hydroxyl radical were determined to be 9.7 ± 0.5 × 109 and 4.9 ± 0.1 × 109 M−1 s−1, respectively. Addition of hydrogen peroxide increased the UV degradation rates of both pesticides and data were simulated through kinetic modeling. The presence of bicarbonate ions reduced the pesticide degradation rates via scavenging of hydroxyl radical but the formation of carbonate radical during the hydroxyl radical scavenging also contributed to the degradation of the pesticides with second-order reaction rate constants of 2.8 ± 0.2 × 106 and 8.8 ± 0.4 × 106 M−1s−1 for parathion and chlorpyrifos, respectively. The dual roles of bicarbonate ion in UV/H2O2 treatment systems, i.e., scavenging of hydroxyl radicals and formation of carbonate radicals, were examined and discussed using a simulative kinetic model. The transformation of pesticides by carbonate radicals at environmentally relevant bi/carbonate concentrations was shown to be a significant contributor to the environmental fate of the pesticides and it reshaped the general phototransformation kinetics of both pesticides in UV/H2O2 systems.

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“…Thus, there was a requirement for precise and accurate methods to quantify its residue. The usual analytical methods employed to determine the amount of pendimethalin was based on gas chromatography techniques coupled to either a mass spectroscopy detector [6][7][8][9], a nitrogen phosphorous detector [10], or an electron capture detector [11,12]. Chemiluminescence (CL) was a high sensitive analytical technique that could be used in the determination of different compounds in a great variety of matrices depending on their participation in a CL reaction as precursors, catalysts, inhibitors, oxidants, etc.…”

Section: Introductionmentioning

confidence: 99%

One novel molecular imprinting nanowires chemiluminescence sensor: preparation and pendimethalin recognition

Yang

et al. 2014

Monatsh Chem

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One kind of pendimethalin-imprinted nanowires has been synthesized using nanoporous alumina membrane as the template. Because of the large surface-tovolume ratio of nanowires structure, the effective binding sites at the surface of the nanowires were sharply increased, and the recognition capability for template molecules was greatly improved. Taking the pendimethalin-imprinted nanowires as the recognition part, a novel chemiluminescence-molecular imprinting sensor was prepared. Its application in the detection of trace pendimethalin in foodstuff showed excellent performance of simple operation, high sensitivity, and good selectivity, through which the high throughput sample detection was realized with satisfied results.

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Experimental approaches to studying the photostability of selected pesticides in water and soil

Cited by 46 publications

References 5 publications

A Critical Review of the Formation of Mono- and Dicarboxylated Metabolic Intermediates of Alkylphenol Polyethoxylates during Wastewater Treatment and Their Environmental Significance

A Critical Review of the Formation of Mono- and Dicarboxylated Metabolic Intermediates of Alkylphenol Polyethoxylates during Wastewater Treatment and Their Environmental Significance

Phototransformation of selected organophosphorus pesticides: Roles of hydroxyl and carbonate radicals

One novel molecular imprinting nanowires chemiluminescence sensor: preparation and pendimethalin recognition

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