Influence of dissolved organic matter on the photodegradation and volatilization kinetics of chlorpyrifos in coastal waters

Pinto, Mariana; Salgado, Ricardo; Cottrell, Barbara A.; Cooper, William J.; Vale, Carlos; Sontag, Gerhard; Noronha, João Paulo

doi:10.1016/j.jphotochem.2015.05.024

Cited by 15 publications

(8 citation statements)

References 49 publications

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“…Chlorpyrifos loss from media during the exposure period (48 h) was expected considering uptake by the organism (Rubach et al 2010). Photolysis, hydrolysis, and volatilization of chlorpyrifos are well known to cause degradation which, along with uptake by the test organism in a static medium, account for the total loss over the 48-h exposure time (Kale et al 1999;Liu et al 2001;Pinto et al 2015).…”

Section: Discussionmentioning

confidence: 99%

Effects of Sublethal Chlorpyrifos Exposure on Postlarval American Lobster (Homarus americanus)

Taylor

Mann

Daoud

et al. 2019

Environmental Toxicology and Chemistry

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The organophosphate pesticide chlorpyrifos has been introduced to the marine environment via adsorption to agricultural soil runoff or as spray drift. Chlorpyrifos affects the survival of some larval decapod crustaceans, but no data exist on the impacts to the American lobster, Homarus americanus. The purpose of the present study was to assess the levels at which chlorpyrifos affects the survival of postlarval H. americanus. Using acute saltwater exposures, the 24‐ and 48‐h median lethal concentrations were established for stage IV H. americanus (1.56 and 1.33 µg/L, respectively). Movement, acetylcholinesterase activity, intermoult period, specific growth rate, and moult increment were measured during exposure to sublethal concentrations. Movement patterns were assessed to establish a 48‐h median inhibition concentration for cessation of normal movement (0.66 µg/L). Acetylcholinesterase activity was found to be inhibited immediately post‐exposure to 0.50, 0.57, and 0.82 µg/L chlorpyrifos but could be recovered within a period (9–15 d) in clean seawater. Sublethal growth effects of increased intermoult period, decreased specific growth rate, and decreased moult increment were observed during exposure to an environmentally relevant concentration (0.82 µg/L). The present study suggests that H. americanus stage IV larvae were marginally less sensitive to chlorpyrifos compared with other decapods and that acute lethality of H. americanus postlarvae is not likely to occur with chlorpyrifos concentrations previously reported from aquatic environments. Environ Toxicol Chem 2019;38:1294–1301. © 2019 SETAC

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Section: Discussionmentioning

confidence: 99%

Effects of Sublethal Chlorpyrifos Exposure on Postlarval American Lobster (Homarus americanus)

Taylor

Mann

Daoud

et al. 2019

Environmental Toxicology and Chemistry

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“…Photolysis tests were conducted with 50 mL of CP solution at 2 and 5 mg L –1 (8.0 ± 0.3). Pinto et al have shown that the salinity in solution has negligible influence on the degradation of CP and on the production of its metabolites . Solution pH was measured by a pH meter (INESA, China), and the change of pH during the photolysis process (10 h) was negligible.…”

Section: Methodsmentioning

confidence: 99%

“…Pinto et al have shown that the salinity in solution has negligible influence on the degradation of CP and on the production of its metabolites. 30 Solution pH was measured by a pH meter (INESA, China), and the change of pH during the photolysis process (10 h) was negligible. The detailed methods of analysis of CP and its photoproducts were illustrated in Text S1, Supporting Information.…”

Section: Methodsmentioning

confidence: 99%

Photolysis-Induced Neurotoxicity Enhancement of Chlorpyrifos in Aquatic System: A Case Investigation on Caenorhabditis elegans

Cao

Yan

Yang

et al. 2019

J. Agric. Food Chem.

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Contamination of the environment by toxic pesticides has become of great concern in agricultural countries. Chlorpyrifos (CP) is among the pesticides most commonly detected in the environment owing to its wide agricultural applications. The aim of this study was to compare potential changes in the toxicity of CP after irradiation. To this end, photolysis of CP was conducted under simulated sunlight, and neurotoxicity assessment was carried out at CP of 20 and 50 μg L–1 and its corresponding irradiated mixture solutions which contain a mixture of identified intermediates using the nematode, Caenorhabditis elegans as a model organism. Photodegradation of 20 μg L–1 CP for 1 h produced no obvious reduction of physiological damage, and more serious effects on animal movement were detected after exposure of the animals to a solution of 50 μg L–1 for 1 h irradiation compared with unirradiated solution. GABAergic and cholinergic neurons were selectively vulnerable to CP exposure, and maximal neuropathological alterations were observed after 1 h irradiation of the CP solutions in coherence with the behavioral impairment. The generation of photoproducts was considered to be responsible for the enhanced disturbance on those biological processes. This work provided useful information on the toxicological assessments of chemicals that were produced during the environmental transformation of pesticides.

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“…TCP was observed to be formed as a major metabolite. [71] Identical intermediate was identified during photolysis with Xe arc lamp. [72] The rapid degradation of the pesticide in the presence of NOx forms various multi oxygenated products and most of the products retained their pyridine ring.…”

Section: Natural Degradationmentioning

confidence: 98%

Toxicity, Natural and Induced Degradation of Chlorpyrifos

Sud

Kumar

Kaur³

et al. 2020

J. Chil. Chem. Soc.

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The increase in demand for agricultural products due to the growing population led to excessive inputs of pesticides in the agriculture field which resulted in contamination of the environmental segments of life i.e. air, water, and soil. Chlorpyrifos is one of the most extensively used broad-spectrum organophosphate insecticides. The usage and broad-spectrum applicability of chlorpyrifos lead to widespread contamination in the environment and serious damage to non-target organisms. Moreover, metabolites of chlorpyrifos i.e. chlorpyrifos-oxon and 3,5,6-trichloro-2-pyridinol are found to be more toxic than its parent compound. This review emphasizes on various toxic effects of chlorpyrifos and its metabolites on living organisms. The efforts put to develop the efficient methods for the degradation of the insecticide in soil and water i.e. photocatalytic, biodegradation, electrochemical and others have been discussed. Analytical techniques used for the study of degraded products and various intermediates formed during degradation under different conditions are summarized. It also includes the general pathway for the degradation of chlorpyrifos. The review will help in the development of tools for degradation and mineralization of organophosphate pesticides by knowing the mechanism of degradation and applicability of the developed process at a large scale.

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Influence of dissolved organic matter on the photodegradation and volatilization kinetics of chlorpyrifos in coastal waters

Cited by 15 publications

References 49 publications

Effects of Sublethal Chlorpyrifos Exposure on Postlarval American Lobster (Homarus americanus)

Effects of Sublethal Chlorpyrifos Exposure on Postlarval American Lobster (Homarus americanus)

Photolysis-Induced Neurotoxicity Enhancement of Chlorpyrifos in Aquatic System: A Case Investigation on Caenorhabditis elegans

Toxicity, Natural and Induced Degradation of Chlorpyrifos

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