Feasibility of constructed wetlands for removing chlorothalonil and chlorpyrifos from aqueous mixtures

Sherrard, Rick M.; Bearr, Jonathan S.; Murray-Gulde, Cynthia L.; Rodgers, John H.; Shah, Yatish T.

doi:10.1016/j.envpol.2003.08.017

Cited by 57 publications

(30 citation statements)

References 13 publications

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“…The relative importance of the phases depends on the availability of the pollutants, hydrophobicity, and affinity for organic matter. On the contrary, first order removal rate of 0.039 h −1 was recorded for chlorpyrifos simulated stormwater runoff treated in constructed wetland mesocosms (Sherrard et al 2004). …”

Section: Resultsmentioning

confidence: 90%

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Safety methods for chlorpyrifos removal from date fruits and its relation with sugars, phenolics and antioxidant capacity of fruits

et al. 2012

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The effectiveness of different postharvest wash treatments at two levels (10 and 20 g/l) for different dipping times was determined to remove chlorpyrifos from date fruits treated at concentration of 2 mg/l. The recovered amount of chlorpyrifos was extracted based on the solid phase extraction (SPE) method and then analyzed by gas chromatography with mass spectrometry (GC-MS). The results demonstrate that the removal of chlorpyrifos increased in the order of acetic acid (AA)> citric acid (CA)> hydrogen peroxide (H 2 O 2 )> potassium permanganate (KMnO 4 )> running water (H 2 O), and the percent of pesticide residue on date fruits depended on the concentration of tested washing treatments and dipping time without the formation of the toxic by-product, chlorpyrifos-oxon. Kinetic studies revealed that chlorpyrifos was found to be more easily removable from date fruits treated with the tested chemical solutions with t 1/2 values of 12-29 min compared with roughly 53 min in case of running water. The impact of these washing treatments on quality of date fruits illustrated that all treatments exerted a little negative effect on total sugars content but H 2 O 2 and KMnO4 at level of 2 % had more drastic effect. Whereas, running water, 10 and 20 g/l CA caused significant increases in total phenolic contents, during all the tested contact times compared with control. Except the insignificant effect of KMnO 4 treatments, antioxidant capacity of date fruits tended to increase in all wash treatments, when the contact times were 5 or 15 min.

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Section: Resultsmentioning

confidence: 90%

“…This leads to pesticide residues on (or in) the fruits at harvest. Unfortunately, no data are available on chlorpyrifos removing from date fruits, although it has been reported in fruits and vegetables (Krol et al 2000), nectarine (Pugliese et al 2004), rice grains (Kushi et al 1999), and water (Sherrard et al 2004).…”

Section: Introductionmentioning

confidence: 99%

Safety methods for chlorpyrifos removal from date fruits and its relation with sugars, phenolics and antioxidant capacity of fruits

et al. 2012

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“…One such practice, constructed wetlands, has been successful at mitigating concentrations of pesticides leaving the agricultural production landscape (Moore et al , 2002Sherrard et al 2004). Biotic and abiotic factors associated with constructed wetlands work in conjunction to remediate pesticide runoff.…”

Section: Discussionmentioning

confidence: 99%

Diazinon Mitigation in Constructed Wetlands: Influence of Vegetation

Moore

Cooper

Smith

et al. 2007

Water Air Soil Pollut

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In intensively cultivated areas, agriculture is a significant source of pesticides associated with storm runoff. When these pollutants enter aquatic receiving waters, they have potential to damage nearby aquatic ecosystems. Constructed wetlands are a best management practice (BMP) designed to help alleviate this potential problem. A constructed wetland system (180×30 m) comprised of a sediment retention basin and two treatment cells was used to determine fate and transport of a simulated storm runoff event containing the insecticide diazinon and suspended sediment. Wetland water, sediment, and plant samples were collected spatially and temporally over 55 d. Results indicated that 43% of the study's measured diazinon mass was associated with plant material, while 23 and 34% were measured in sediment and water, respectively. Mean diazinon concentrations in water, sediment, and plants for the 55-d study were 18.1±4.5 μg/l, 26.0±8.0 μg/kg, and 97.8± 10.7 μg/kg, respectively. Aqueous concentrations fluctuated in the wetlands between 51-86 μg/l for the first 4 h of the experiment; however, by 9 h, aqueous concentrations were approximately 16 μg/l. During the 55 d experiment, 0.3 m of rainfall contributed to fluctuations in diazinon concentrations. Results of this experiment can be used to model future design specifications for mitigation of diazinon and other pesticides.

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“…Retention of the pesticide by the HSSFCW was most likely due to adsorption [35,36] and biodegradation. [18,36] The two types of HSSFCW exhibited significant differences in their total heterotrophic bacteria, anaerobic bacteria and Pseudomonas spp. (P ≤ 0.05).…”

Section: Discussionmentioning

confidence: 99%

“…[16,17] The toxicity of pesticides such as CLT has been documented for a large number of microorganisms. [18,19] The primary influence that pesticides exert on biological processes in wetland treatment systems is to reduce efficiency of organic matter removal by microbial populations. Although pesticides and organic matter are well-known components of agricultural effluents, their interactions have not been widely studied.…”

Section: Downloaded By [Univ Politec Cat] At 03:59 18 February 2013mentioning

confidence: 99%

Influence of chlorothalonil on the removal of organic matter in horizontal subsurface flow constructed wetlands

Casas

Rìos

Florville-Alejandre

et al. 2013

Journal of Environmental Science and Health, Part B

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Feasibility of constructed wetlands for removing chlorothalonil and chlorpyrifos from aqueous mixtures

Cited by 57 publications

References 13 publications

Safety methods for chlorpyrifos removal from date fruits and its relation with sugars, phenolics and antioxidant capacity of fruits

Safety methods for chlorpyrifos removal from date fruits and its relation with sugars, phenolics and antioxidant capacity of fruits

Diazinon Mitigation in Constructed Wetlands: Influence of Vegetation

Influence of chlorothalonil on the removal of organic matter in horizontal subsurface flow constructed wetlands

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