Determination of CHLORPYRIFOS by GC/ECD in water and its sorption mechanism study in a RHODIC FERRALSOL

Schwantes, Daniel; Gonçalves, Affonso Celso; Conradi, Élio; Campagnolo, Marcelo Ângelo; Zimmermann, Juliano

doi:10.1007/s40201-020-00448-1

Cited by 24 publications

(7 citation statements)

References 33 publications

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“…A regression equation with regression coe cient (r 2 ) of 0.9913 was obtained indicating excellent linearity. Similar to our ndings, several researchers obtained good linearity (0.99) in different commodities like vegetables, water etc [23,24] .…”

Section: Resultssupporting

confidence: 91%

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Rapid estimation of chlorpyrifos in feed samples using Gas Chromatograph- Micro Electron Capture Detector (GC-µECD)

Rao,

Prasad,

Thomas

et al. 2023

Preprint

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In this research paper, we have standardized a rapid method for estimation of chlorpyrifos residues in feed samples using Gas Chromatograph- Micro Electron Capture Detector(GC-µECD). The extraction method used for this study was QuEChERS viz. quick, easy, cheap, effective, rugged and safe. Validation was done by performing the following parameters; Linearity, Limit of detection (LOD), Limit of quantification (LOQ), Matrix effect and Recovery percentage. A regression equation with regression coefficient (r2) of 0.9913 was obtained indicating excellent linearity. LOD and LOQ of the method were obtained as 0.1 mg/L and 0.4 mg/L respectively. Recovery percentage of the spiked concentration 0.1 ppm was obtained as 85.7% and for 0.5 ppm it was 77.7%. We have analyzed in different feedstuffs (representing green fodder, dry fodder and concentrates) collected from six different districts (Guntur and East Godavari (Andhra Pradesh), Warangal (Telangana state) and Dakshina Kannada, Raichur and Gulbarga (Karnataka state)). From a total of 565 samples collected, 37 samples were positive for chlorpyrifos indicating a positivity rate of 6.55%. Among the positive samples except one oil meal sample, all the samples are under maximum permissible limits (MPL) suggested by codex alimentarius for animal feeds.

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Section: Resultssupporting

confidence: 91%

“…In this study, LOD of the method was obtained as 0.1 mg/L and LOQ as 0.4 mg/L (Table 2). Similar values are reported in other studies [18,24] . Some have reported lesser and higher values than our studies and those variations due to differences in extraction procedure or instrumentation.…”

Section: Limit Of Detection and Limit Of Quanti Cation (Lod And Loq)supporting

confidence: 93%

Rapid estimation of chlorpyrifos in feed samples using Gas Chromatograph- Micro Electron Capture Detector (GC-µECD)

Rao,

Prasad,

Thomas

et al. 2023

Preprint

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“…The above authors report that 4.0 g L -1 produced the higher removing percentage of Cd 2+ , Pb 2+ , and Cr total from water, and, in the case of Cd 2+ adsorption systems, the pH ranges from 6.0 to 7.0 presented higher removal rates. Similarly, Schwantes et al [42, 43] found no pH dependency (from 3.0 to 7.0) on adsorption of Zn by crambe-based adsorbents, being the adsorbent dose the primary influencer on Zn removal. In their studies, the higher Zn removal rates were found using 5.0 g L -1 .…”

Section: Resultsmentioning

confidence: 97%

“…Gonçalves Junior et al [41], studying Euterpe Oleracea -based adsorbent, found 5.09 as pH PZC . Schwantes et al [42, 43] found 5.67 for a crambe-based adsorbent ( Crambe abyssinica Hochst). Schwantes et al [12] found 4.28 for the grape steam adsorbent.…”

Section: Resultsmentioning

confidence: 99%

Ecofriendly Biosorbents Produced from Cassava Solid Wastes: Sustainable Technology for the Removal of Cd²⁺, Pb²⁺, and Cr^total

Schwantes

Gonçalves

Perina

et al. 2022

Adsorption Science & Technology

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This research is aimed at investigating the possible use of cassava agroindustry solid wastes in manufacturing adsorbents and their use in removing heavy metals Cd2+, Pb2+, and Crtotal from water. Thus, a pilot study was conducted in two main steps: (1) obtaining and characterizing the adsorbents and (2) laboratory studies focused on the evaluation of critical physicochemical parameters on adsorption, such as pH of the solution containing heavy metals, the effect of adsorbent dose, besides kinetics and equilibrium adsorption and desorption studies. Three adsorbents were studied, cassava barks, bagasse, and their mixture. SEM, FTIR, pHPZC, acid digestion, and chemical composition analysis were employed for adsorbent characterization. The pH of the contaminated solution was evaluated within 4.0 to 7.0, while the adsorbent doses varied from 5.0 to 24.0 g L-1. The adsorption kinetics was evaluated within 5 to 180 minutes and interpreted using pseudofirst- and second-order models. Finally, equilibrium and desorption studies were performed by evaluating adsorbent performance within 5 to 200 mg L-1 of heavy metals, using several nonlinear models for results interpretation. SEM analysis reveals a heterogeneous structure full of cavities. FTIR before and after adsorption reveals gaps related to missing functional groups, suggesting a significant role of alkenes, carboxylic acid, alcohol, anhydride, and ether. pHPZC is found at pH 6.02, 6.04, and 6.26 for adsorbents derived from barks, bagasse, and their mixture. In low concentrations of metals, the higher adsorption capacities were found at pH 7.0 (94.9%) using 16 g L-1 of adsorbent, with the most cost-benefit dose found using 8.0 g L-1. The removal of metals reaches equilibrium within 5-10 minutes of contact time with pseudosecond-order best adjustments to the observed phenomena. The adsorption of metals by a cassava adsorbent is better adjusted to the Freundlich model, with significant and critical information provided by Sips, Redlich-Peterson, Temkin, Liu, and Khan models. Adsorption/desorption studies indicate that cassava adsorbent performs, on average, -10% of the adsorption of metals compared to activated carbon. Nevertheless, factors such as low cost and availability favor the use of such natural materials.

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“…Вміст пестициду визначали за допомогою газової хроматографії. Концентрацію хлорпірофосу визначали співробітники лабораторії біологічно активних сполук ІГБ НАНУ методом газової хроматографії (Schwantes et al, 2020). Для хроматографування використовували рідкісний хроматограф Agilent 1100.…”

Section: Toxic Influence Of Chlorpyrophos On Carp Larvae Under the Co...unclassified

Токсичний Вплив Хлорпірофосу На Личинок Коропа За Умов Модельного Експерименту Та В Разі Біотестування Якості Води

Худіяш,

Потрохов,

Зіньковський

et al. 2023

Ukrainian Journal of Natural Sciences

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Наведені дані щодо негативної дії хлорпірофосу на личинок коропа за допомогою хіміко-токсикологічного аналізу. Визначення токсичності сполуки проводили методом біотестування і у модельних експериментах, метою яких було проведення порівняльного аналізу фармотоксикологічного ефекту токсиканту за різних умов. У результаті аналізу було встановлено, що для личинок коропа у модельних експериментах LC50 хлорпірофоса становила 0,009 мг/дм 3 при експозиції у розчинах 96 год. При біотестуванні у воді з різним ступенем забрудненості природних водойм LC50 за дії хлорпірофосу становило 0,255 мг/дм 3 , що в майже у 30 разів більше, ніж за хімічним методом. Низький фарамакологічний ефект хлорпірофоса на личинок коропа за результатами 1 кандидат біологічних наук, старший науковий співробітник відділу біології відтворення риб (Інститут гідробіології Національної академії наук України, м. Київ

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Determination of CHLORPYRIFOS by GC/ECD in water and its sorption mechanism study in a RHODIC FERRALSOL

Cited by 24 publications

References 33 publications

Rapid estimation of chlorpyrifos in feed samples using Gas Chromatograph- Micro Electron Capture Detector (GC-µECD)

Rapid estimation of chlorpyrifos in feed samples using Gas Chromatograph- Micro Electron Capture Detector (GC-µECD)

Ecofriendly Biosorbents Produced from Cassava Solid Wastes: Sustainable Technology for the Removal of Cd²⁺, Pb²⁺, and Cr^total

Токсичний Вплив Хлорпірофосу На Личинок Коропа За Умов Модельного Експерименту Та В Разі Біотестування Якості Води

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Determination of CHLORPYRIFOS by GC/ECD in water and its sorption mechanism study in a RHODIC FERRALSOL

Cited by 24 publications

References 33 publications

Rapid estimation of chlorpyrifos in feed samples using Gas Chromatograph- Micro Electron Capture Detector (GC-µECD)

Rapid estimation of chlorpyrifos in feed samples using Gas Chromatograph- Micro Electron Capture Detector (GC-µECD)

Ecofriendly Biosorbents Produced from Cassava Solid Wastes: Sustainable Technology for the Removal of Cd2+, Pb2+, and Crtotal

Токсичний Вплив Хлорпірофосу На Личинок Коропа За Умов Модельного Експерименту Та В Разі Біотестування Якості Води

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Ecofriendly Biosorbents Produced from Cassava Solid Wastes: Sustainable Technology for the Removal of Cd²⁺, Pb²⁺, and Cr^total