Physical and Chemical Properties of Pyrethroids

Laskowski, D. A.

doi:10.1007/978-1-4757-4260-2_3

Cited by 412 publications

(286 citation statements)

References 3 publications

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“…Four months after the contamination, high concentrations of permethrin were still detected in sediment, algae and snails. According to Laskowski (2002), this accumulation of permethrin offers the ability to persist long periods in aquatic sediments and posed a hazard to benthic organisms such as the meiobenthos. This persistence has also been reported for other pesticides of the pyrethroid family.…”

Section: Discussionmentioning

confidence: 99%

“…Some characteristics of pyrethroids such as persistence in aquatic environment and organisms can increase their toxicity. In fact, their half-lives in the environment typically are on the order of days to weeks in the aqueous phase (Laskowski 2002) exhibit prolonged persistence in aquatic sediments. Lee et al (2004) reported a bifenthrin half-life of 163d in a creek sediment slurry; deltamethrin was detectable in sediments of a pond mesocosm at the concentrations of 3 to 5 ng g −1 after nearly one year (Muir et al 1985) and a high concentrations of permethrin were still detected in sediment, algae and snails after four months (Dietrich et al 1996).…”

Section: Introductionmentioning

confidence: 99%

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Impacts of permethrin contamination on nematode density and diversity: A microcosm study on benthic meiofauna from a Mediterranean coastal lagoon

et al. 2012

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A microcosm experiment was used to examine the response of nematode in terms of density and diversity at different levels of permethrin contamination. The sediments were contaminated with three permethrin concentrations [P1: low (5 mg kg −1 ), P2: medium (25 mg kg −1 ) and P3: high (250 mg kg −1 )] and the effects were evaluated after 30 days. The results from univariate and multivariate analyses showed significant differences between nematode assemblages from uncontaminated control and those from permethrin treatments. All univariate indices changed significantly at all the levels of permethrin contamination. In fact, the total nematode abundance (I), Shannon-Weaner index (H ), species richness (d), evenness (J ) and number of species (S) decreased significantly in all the contaminated microcosms. In addition, the results from multivariate analyses of the species abundance data demonstrated that permethrin affects the responses of nematode species. These significant modifications in nematode community structures with response to permethrin contamination were the consequences of a different specific tolerance to this pesticide. Thus, Araeolaimus bioculatus, Calomicrolaimus honestus, Oncholaimus campylocercoides and Theristus pertenuis characterized by increased abundances in all treated replicates, appeared to be "permethrin-resistant" species. Daptonema trabeculosum was eliminated in all the doses tested and seemed to be a very sensitive species to permethrin contamination.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Impacts of permethrin contamination on nematode density and diversity: A microcosm study on benthic meiofauna from a Mediterranean coastal lagoon

et al. 2012

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“…A previous study [11] reports an average K oc value of 704,000 for deltamethrin, indicating that the active ingredient is tightly bound to the soil and therefore considered as immobile. The present study calculations of K oc yields range from 50,000 to 4000,000.…”

Section: Residue Analysismentioning

confidence: 93%

Remediation of deltamethrin contaminated cotton fields: residual and adsorption assessment

et al. 2016

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Pakistan occupies a significant global position in the growing of high quality cotton. The extensive application of pesticides on agricultural products leads to environmental risk due to toxic residues in air, water and soil. This study examined the chemodynamic effect of Deltamethrin on cotton fields. Samples were collected from the cotton fields of D.G. Khan, Pakistan and analyzed for heavy metal speciation patterns. Batch experiments were administered in order to study the adsorption of Deltamethrin in cotton fields. The effect of different factors including pH, adsorbate dose, and adsorbent mass on adsorption were studied. It was observed that in general, adsorption increased with increases in the mass of adsorbate, although the trends were irregular. Residual fractions of deltamethrin in the soil and water of cotton fields were analyzed to assess concentrations of xenobiotics bound to soil particles. Results indicated that such residues are significantly higher in soil samples due to high Koc in comparison to water, indicating the former is an efficient degradation agent. Results from the batch experiment resulted in 95% removal with alkaline pH and an adsorbent-adsorbate ratio of 250:1. These results may be used to environment friendly resource management policies.

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“…where, C free and C fiber were the freely-dissolved chemical concentration and SPME fiber concentration, respectively, and K OC and K fw were the partition coefficients between OC or fiber and water, respectively, and their values were taken from the literature (Laskowski, 2002;You et al, 2007). The OC normalized LC50 was used to calculate TU bioavailable due to the lack of Tenax-and SPME-based LC50 values.…”

Section: Tu ¼ Sediment Concentrationðoc Normalizedþmentioning

confidence: 99%

Addition of contaminant bioavailability and species susceptibility to a sediment toxicity assessment: Application in an urban stream in China

Sun

Chen

et al. 2013

Environmental Pollution

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Physical and Chemical Properties of Pyrethroids

Cited by 412 publications

References 3 publications

Impacts of permethrin contamination on nematode density and diversity: A microcosm study on benthic meiofauna from a Mediterranean coastal lagoon

Impacts of permethrin contamination on nematode density and diversity: A microcosm study on benthic meiofauna from a Mediterranean coastal lagoon

Remediation of deltamethrin contaminated cotton fields: residual and adsorption assessment

Addition of contaminant bioavailability and species susceptibility to a sediment toxicity assessment: Application in an urban stream in China

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