Comparison of Fenitrothion and Trifluralin Adsorption on Organo-Zeolites and Activated Carbon. Part II: Thermodynamic Parameters and the Suitability of the Kinetic Models of Pesticide Adsorption

Lule, Guzide Meltem; Atalay, Mustafa

doi:10.1080/02726351.2014.892403

Cited by 7 publications

(5 citation statements)

References 3 publications

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“…The negative value of ΔG indicates the reaction is favorable. Similar results were found for adsorption of other pesticides on activated carbon, such as Atrazine, Methoxychlor, Parathion-methyl (Gupta et al, 2011), andFenitrothion (Lule andAtalay, 2014).…”

Section: Resultssupporting

confidence: 80%

Carbendazim Adsorption on Granular Activated Carbon of Coconut Shell: Optimization and Thermodynamics

Almeida,

Silva,

Tavares

et al. 2023

Rev. AIDIS ing. cienc. ambient.

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The adsorption of the fungicide Carbendazim (CBZ) on granular activated carbon (GAC) of coconut shell was investigated through batch tests in deionized water. The most favorable conditions for the adsorption of CBZ were examined through the variation of the mass of GAC, temperature, and contact time. The Response Surface Methodology (RSM) was applied, seeking the best adsorption condition to optimize future tests. A thermodynamic analysis was carried out using the Van't Hoff method. The tests with the dosage of 10 mg of GAC and temperatures of 25º C and 30º C showed higher adsorption of the fungicide. The Freundlich isotherm adjusted best to the adsorption of the compound. The Freundlich intensity parameter had a result that contrasted with the value of ΔG regarding a spontaneous change. Physisorption predominates the adsorption of CBZ on GAC. It is an exothermic and spontaneous process that reduces the degree of disorder of the adsorbent/solution interface.

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Section: Resultssupporting

confidence: 80%

Carbendazim Adsorption on Granular Activated Carbon of Coconut Shell: Optimization and Thermodynamics

Almeida,

Silva,

Tavares

et al. 2023

Rev. AIDIS ing. cienc. ambient.

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“…2), which could be due to modifications of the biomass during the inactivation process such as drying or volatisation, which could free up active sites or increase the surface area for adsorption. 34 …”

Section: Discussionmentioning

confidence: 99%

Metaldehyde removal from drinking water by adsorption onto filtration media: mechanisms and optimisation

Rolph

Jefferson

Hassard

et al. 2018

Environ. Sci.: Water Res. Technol.

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a Trace micropollutants should be removed during drinking water production without increasing the disinfection-by-product formation potential or energy demand of the treatment process. We demonstrate the efficacy of different filtration media to remove metaldehyde through controlled batch experiments on water augmented with metaldehyde. Equilibrium concentrations of metaldehyde and surrogate organics were successfully described by the Freundlich isotherm. Metaldehyde can be attenuated to varying degrees with activated carbon and sand with an active and inactive biofilm with k f values ranging from 0.006-0.3. The presence of the active biofilm improved metaldehyde adsorption by sand media, due to additional biosorption mechanisms, a greater surface area or biodegradation. Baseline levels of competing natural organic matter surrogates (NOM) reduced overall adsorption efficacy but increasing concentrations of NOM did not impact metaldehyde removal efficacy in a significant way. Biological activated carbon was identified as the most suitable adsorbent of metaldehyde (94% removal) but sand with an acclimated biofilm was capable of acting as a bio-adsorbent of metaldehyde even under environmentally relevant concentrations (41% adsorption from 0.002.5 mg L −1). Moreover, we observed that thermal hydrolysis of metaldehyde occurred at 60°C, suggesting that thermal regeneration of GAC for this pesticide was possible at relatively low temperatures. Biological adsorption and thermal hydrolysis approaches presented herein offered a way forward to increase efficiency and cost effectiveness of existing treatments for metaldehyde. IntroductionIn Europe, water treatment works (WTW) are required to meet the European Union drinking water standard of 0.1 μg L −1 for individual pesticides. This includes the molluscicide, metaldehyde, which is an uncharged, low M w , highly soluble compound. Such characteristics make it difficult to remove in traditional drinking water treatment processes as evidenced by the fact that it is responsible for most pesticide related drinking water failures in the UK. Water impactOur study is topical, as it provides insights into adsorption of metaldehyde onto different sorbents. Bio-active carbon had the greatest metaldehyde removal through biosorption to biofilms which along with thermal hydrolysis represent strategies for improving the performance and resilience of filtration media to polar pesticides. overall metaldehyde adsorption capacity. 7,8 The impact of background interferences, on the metaldehyde adsorption, remains poorly quantified, in particular, the role of organic and inorganic compounds which are typically present in source waters. This is important as these compounds compete for adsorption sites in adsorptive media. Slow sand filters (SSFs) could provide an effective treatment for metaldehyde by promoting coupled adsorption and biosorption. 8 The adsorption efficiency of SSFs or microbial

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“…4) indicated that the sorption kinetics depends considerably on the pesticide concentration, which was also previously reported for fenitrothion and trifluralin sorption to organo-zeolite. 26 Thus, considering the lower concentration, the sorption kinetics decreased in the order PL > VR > CH > RG, while the k 2 data for the higher one showed the order VR > CH = RG > PL.…”

Section: Resultsmentioning

confidence: 88%

“…The influence of the initial pesticide concentration (fenitrothion and trifluralin) on the k 1 constant was previously reported too. 26 As with q max values, the Pearson correlation showed positive but not significant correlations between k 1 data and all soil properties (Table S2†). Although this model is most frequently used for explaining the sorption kinetics of different solute/sorbent combinations, it has some limitations.…”

Section: Resultsmentioning

confidence: 91%

“…4) indicated that the sorption kinetics depends considerably on the pesticide concentration, which was also previously reported for fenitrothion and triuralin sorption to organo-zeolite. 26 Thus, considering the lower concentration, the sorption kinetics Fig. 4 Short-term sorption kinetics parameters obtained by hyperbolic (q max ), pseudo-first-order (q max and k 1 ) and pseudo-second-order (q max and k 2 ) kinetics models for clomazone in four soils at: (a) 0.5 mg L −1 and (b) 15 mg L −1 .…”

Section: †)mentioning

confidence: 99%

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Characterization of the clomazone sorption process in four agricultural soils using different kinetic models

Đurović-Pejčev

Radmanović

Tomić

et al. 2023

Environ. Sci.: Processes Impacts

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Comparison of Fenitrothion and Trifluralin Adsorption on Organo-Zeolites and Activated Carbon. Part II: Thermodynamic Parameters and the Suitability of the Kinetic Models of Pesticide Adsorption

Cited by 7 publications

References 3 publications

Carbendazim Adsorption on Granular Activated Carbon of Coconut Shell: Optimization and Thermodynamics

Carbendazim Adsorption on Granular Activated Carbon of Coconut Shell: Optimization and Thermodynamics

Metaldehyde removal from drinking water by adsorption onto filtration media: mechanisms and optimisation

Characterization of the clomazone sorption process in four agricultural soils using different kinetic models

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