Kinetic, isotherm and thermodynamic adsorption studies of organophosphorus compound (phosmet) on reduced graphene oxide

Rahman, Afreen Jahan; Ojha, Himanshu; Pandey, Akhilesh; Kumar, Sandeep; Singhal, Rahul; Datta, Anupama; Singh, Brajendra K.

doi:10.1016/j.diamond.2022.109191

Cited by 5 publications

(4 citation statements)

References 52 publications

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“…The percentage removal of FNM decreased (93.28 % to 80.91 %) as the temperature increased from 30 °C to 50 °C (Figure 3C). The results indicate the exothermic nature of the adsorption process [69] . This is due to the tendency of the FNM molecules to get away from the solid phase to the bulk phase as the temperature of the solution was raised [71] …”

Section: Resultsmentioning

confidence: 96%

“…This is due to the increase in the availability of active sites as the amount of adsorbent increased. However, on further increasing the amount of adsorbent from 4 mg to 6 mg (93.96 %) and 6 mg to 8 mg (94.01 %), the enhancement in %E was not so significant [69] . The amount of adsorbent was decided at 4 mg for further adsorption examination [70] …”

Section: Resultsmentioning

confidence: 99%

“…The results indicate the exothermic nature of the adsorption process. [69] This is due to the tendency of the FNM molecules to get away from the solid phase to the bulk phase as the temperature of the solution was raised. [71]…”

Section: Effect Of Temperaturementioning

confidence: 99%

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Efficacious Removal of Flonicamid Insecticide from Water by GO@functionalized Calix[4]pyrrole: Synergistic Effect in Adsorption

et al. 2023

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The presence of a highly toxic pyridine carboxamide insecticide, namely flonicamid in water bodies poses a serious risk to both the aquatic ecosystem and human health. Therefore, a graphene oxide (GO) decorated with azo‐functionalized calix[4]pyrrole i. e. GO‐azocalix[4]pyrrole (GACP) was synthesized to study the removal of flonicamid insecticide through adsorption. The nano‐adsorbent was characterized by IR, XPS, TGA, Raman, SEM, and TEM data. The effect of concentration of flonicamid solution, contact time, adsorbent dosage, temperature, and pH was investigated in the batch adsorption process. Experimental data suggested that equilibrium was attained within 40 min and adsorption efficiency was 93.28 %. The synergistic effect of GO and azocalix[4]pyrrole played an important role in the adsorption. The Langmuir isotherm was followed and the maximum adsorption capacity was found to be 11.43 mg/g. The pseudo‐second‐order kinetic data was well obeyed and thermodynamic investigation suggested the feasible and spontaneous nature of flonicamid onto GACP nanocomposite.

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Section: Resultsmentioning

confidence: 96%

Section: Resultsmentioning

confidence: 99%

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Efficacious Removal of Flonicamid Insecticide from Water by GO@functionalized Calix[4]pyrrole: Synergistic Effect in Adsorption

et al. 2023

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“…Adsorption isotherms can evaluate the capacity of an adsorbent and help understand the underlying physicochemical nature, which has practical applications [ 41 ]. For isotherm modeling Langmuir isotherm, Freundlich isotherm, and Temkin isotherm models non-linear fitting were used to analyze the equilibrium data obtained.…”

Section: Methodsmentioning

confidence: 99%