Sorption and desorption behaviours of 2,4‐D and glyphosate in calcareous soil from Antalya, Turkey

Özbay, Bilge; Akyol, Nihat Hakan; Akyol, Gökçe; Özbay, İsmail

doi:10.1111/wej.12311

Cited by 27 publications

(34 citation statements)

References 53 publications

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“…Other studied compounds were released from HA within the range of 4.4-10.8% of the sorbed pesticide dose. These findings are in agreement with the recent work of Ozbay et al (2017), who attributed the rapid 2,4-D desorption to soft carbon fraction of SOM (humic/fluvic acid and lipids) (Ozbay et al 2017).…”

Section: Desorption Of Pesticides Under Study From Ha and Bcsupporting

confidence: 93%

Humic acid and biochar as specific sorbents of pesticides

et al. 2018

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The aim of the research was to compare the effect of two types of organic sorbents-humic acid (HA) and biochar (BC)-in sorption-desorption processes of different polar pesticides, which residues are commonly present in arable soils and are potentially harmful for the environment. It also aims to advance the understanding of behavior of both ionizable and nonionizable pesticides in the presence of BC and HA in soils. Materials and methods Three different classes of pesticides were investigated: carbamates (carbaryl and carbofuran), phenoxyacetic acids (2,4-dichlorophenoxyacetic acid (2,4-D) and 4-chloro-2-methylphenoxyacetic acid (MCPA)), and aniline derivatives (metolachlor). Investigated humic acid was extracted by Shnitzer's method from topsoil horizon of arable Gleyic Phaeozem. Biochar was produced from wheat straw in gasification process at 550°C, remaining 30 s in the reactor. To obtain the experimental goal structural properties of both sorbents were determined and sorption-desorption experiments conducted. To the investigated organic matter samples (HA or BC), 10 or 15 mg L −1 pesticide solutions in 10 mM CaCl 2 were added and the mixtures were shaken for 24 h. Afterwards, the samples were centrifuged and supernatants analyzed by LC-MS/MS for the pesticide content. Analogous experiment was performed for desorption studies (samples refilled with 10 mM CaCl 2). Results and discussion Humic acids exhibited strong affinity for the ionic substances, for which high-percentage uptake (74.6 and 67.9% initial dose of 2,4-D and MCPA, respectively) was obtained. Retention of nonionic carbamates on HA was much weaker (35.4% of carbofuran and 10.2% of carbaryl sorbed). Sorption of carbamates to BC was significantly reduced (76.4-84.3%) by the alkaline hydrolysis. Metolachlor was bound comparably strong both by HA (72.9%) and BC (70.2%), although different mechanisms governed its sorption. Noticeable desorption occurred only in the case of 2,4-D bound to HA (over 50%), whereas other studied compounds were released from HA within the range of 4.4-10.8% of the dose sorbed. Oppositely to HA, desorption of all studied pesticides from BC was completely inhibited, except for 2,4-D (3.7% desorbed). Conclusions Investigated humic acid has high affinity to polar, ionic pesticides of high water solubility, which are sorbed via specific interactions with HA functional groups. Studied biochar, due to its moderately hydrophobic character, preferentially attracts nonionic pesticides of relatively high logP values and low water solubility. Hydrophobic bonding is postulated as a main mechanism of their attraction to BC. Besides sorbent structural properties, pH is the main factor governing sorption equilibria in the studied mixtures.

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Section: Desorption Of Pesticides Under Study From Ha and Bcsupporting

confidence: 93%

Humic acid and biochar as specific sorbents of pesticides

et al. 2018

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“…Another batch experiment was conducted to explore the sorption isotherms of 2,4-D in nine urban soils applied in the range of 0.5–20 mg L –1 . The Langmuir and Freundlich sorption isotherms were applied for quantitative analysis of 2,4-D transport from liquid to a solid phase to understand the nature of interactions between 2,4-D and the soil matrix . The Langmuir isotherm is used mainly for monolayer sorption on perfectly smooth and homogeneous surfaces, whereas the Freundlich isotherm is used to model for multilayer sorption in heterogeneous surfaces .…”

Section: Resultsmentioning

confidence: 99%

“…In fact, the fate and movement of the pesticides in diverse sections of the environment are strongly influenced by sorption and desorption, as these are the fundamental processes that influence their mobility and bioavailability . A large body of information on sorption–desorption of 2,4-D in agricultural soils is available in the literature; ,− however, virtually no reports are available on urban soils, although such data are very much essential to understand the potential health risks of pesticides in humans. The changes in urban soils that occur due to infrastructure development result in pervious and impervious surfaces (footpaths, streets, concrete surfaces) with micropore collapse, dense particle packing, ped breakdown, high bulk density, and so forth .…”

Section: Introductionmentioning

confidence: 99%

Movement and Fate of 2,4-D in Urban Soils: A Potential Environmental Health Concern

et al. 2020

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The fate and movement of 2,4-dichlorophenoxyacetic acid (2,4-D), in terms of sorption–desorption and leaching potential, were evaluated in urban soils following the batch experimental method. The sorption kinetics of 2,4-D in soils followed both “fast” and “slow” sorption processes that could be well described by a pseudo-second-order kinetics model, suggesting that 2,4-D was partitioned into soil organic matter and clay surfaces, and eventually diffused into soil micropores. The sorption isotherms were linear, following both Langmuir and Freundlich models. Partially decomposed or undecomposed organic matter present in urban soils decreased sorption and increased desorption of 2,4-D. Also, sorption of 2,4-D increased with an increase in the contents of clay and Al and Fe oxides, whereas sand and alkaline pH increased the desorption process. The lower calculated K d values suggest that 2,4-D is highly mobile in urban soils than in agricultural soils. The calculated values of groundwater ubiquity score, leachability index, and hysteresis index indicated that the herbicide is highly prone to leach out from surface soil to groundwater which might affect the quality of potable water. The present study clearly suggests that 2,4-D must be judiciously applied in the urban areas in order to minimize the potential health and environmental risks.

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“…In the European Union, glyphosate has been approved until 2022, and reevaluation procedures are ongoing 8 . While glyphosate was 300 tons in Turkey in 2001, it is estimated to reach 8,000 tons in 2019 [9][10][11][12] .…”

Section: Introductionmentioning

confidence: 99%

Glifosatın glukoz-6-fosfat dehidrogenaz enzim aktivitesi üzerindeki etkisinin in vitro koşullarda değerlendirilmesi

Kartlaşmış

Dikmen

2022

Cukurova Medical Journal

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Öz Purpose:The aim of this study was to investigate in vitro effect of glyphosate on Glucose 6-phosphate dehydrogenase (G6PD) enzyme activity. Materials and Methods: In terms of G6PD enzyme deficiency, samples taken from healthy and enzyme deficient male individuals were studied. After the hemolysates were prepared from blood sample, G6PD enyzme activities were determined by the modified Beutler method. Then, the effects of different concentrations (5.3x10 -3 , 5.3x10 -4 , 5.3x10 -5 , 5.3x10 -6 mmol/mL) of glyphosate on G6PD activity were evaluated in normal and mutant enzymes. In addition, the in vitro effect of the antioxidant N-acetylcysteine (NAC) on the enzyme was investigated in the presence of glyphosate and without glyphosate. Results: While the result of normal erythrocyte G6PD activity was 12U/g for the individual, the result for the individual with enzyme deficiency was 2.5U/g Hb. The glyphosate's maximum activity loss in the G6PD enzyme was observed in the 60th minute incubation. The highest inhibition was observed at 5.3x10 -3 mmol/mL glyphosate. 4.7x10 -7 mmol/mL N-Acetylcysteine partially increased the inhibition of glyphosate in the G6PD enzyme in healthy individuals, but had no effect on mutant G6PD. Conclusion:In humans, it is predicted that glyphosate affects G6PD enzyme activity in vitro and is an interference agent in the experimental process. In case of contamination, studies on limits of glyphosate that will not cause harmful effects in humans should be continued.Amaç: Bu çalışmada, substrat Glukoz-6-fosfat (G6P) ile moleküler yapı benzerliği ve enzimin kofaktör olarak Mg +2 kullanması nedeniyle, eritrosit G6PD enzimi üzerindeki in vitro etkisi incelendi. Gereç ve Yöntem: Çalışmada sağlıklı ve G6PD enzim eksikliği olan erkek bireylerin kan örneklerinden yararlanıldı. Hazırlanan hemolizatların enzim aktiviteleri modifiye Beutler yöntemi ile ölçüldükten sonra deney ortamına farklı derişimlerde (5.3x10 -3 , 5.3x10 -4 , 5.3x10 -5 , 5.3x10 -6 mmol/mL) glifosat eklenerek aktivite üzerindeki etkisi değerlendirildi. Daha sonra antioksidan Nasetilsisteinin normal ve mutant enzimler üzerindeki etkisi in vitro deney koşullarında glifosatlı ve glifosatsız ortamda karşılaştırıldı. Bulgular: Sağlıklı örnekte eritrosit G6PD aktivitesi 12, enzim eksikliği bulunan olguda ise 2.5 U/gr Hb olarak saptandı. Deney ortamına glifosat eklenmesinden sonra en yüksek aktivite kaybı 60. dakikada saptandı. En yüksek inhibisyon oranı ise 5.3x10 -3 mmol/mL glifosatın etkilediği çalışma setinde gözlendi. 4.7x10 -7 mmol/mL N-Asetilsistein, normal aktivitedeki G6PD enziminde glifosatın oluşturduğu inhibisyonu azalttı ancak mutant G6PD enzim aktivitesi üzerinde herhangi bir değişikliğe neden olmadı. Sonuç: Bu çalışmayla glifosatın insanlarda in vitro olarak eritrosit G6PD enzimini inhibe ettiği gösterildi. İlaveten laboratuvar ortamında G6PD enzim aktivitesinin ölçüldüğü ve/veya kullanıldığı deneysel süreçte, negatif interferans ajanı olarak davrandığı gösterildi. Ayrıca bulaşı durumlarında glifosatın insanlarda zararlı etkiy...

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Sorption and desorption behaviours of 2,4‐D and glyphosate in calcareous soil from Antalya, Turkey

Cited by 27 publications

References 53 publications

Humic acid and biochar as specific sorbents of pesticides

Humic acid and biochar as specific sorbents of pesticides

Movement and Fate of 2,4-D in Urban Soils: A Potential Environmental Health Concern

Glifosatın glukoz-6-fosfat dehidrogenaz enzim aktivitesi üzerindeki etkisinin in vitro koşullarda değerlendirilmesi

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