Removal of an organophosphorus pesticide by engineered silylated graphene oxide

The removal of organophosphorus pesticides is the growing concern. The pesticides are biomagnified in food chain, causing greater health hazards to humans and animals. Adsorption is one of the most efficient approaches for removal of organophosphorus compounds. The current study describes the adsorp...

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Bibliographic Details
Published in:Journal of materials science 2024-07, Vol.59 (26), p.11952-11969
Main Authors: Kaur, Lajpreet, Mishra, Ayushi, Sharma, Aanchal, Pathak, Mallika, Ojha, Himanshu
Format: Article
Language:English
Subjects:
Adsorbents
Adsorption
Adsorptivity
Bioaccumulation
Biocompatibility
Characterization and Evaluation of Materials
Chemisorption
Chemistry and Materials Science
Classical Mechanics
Crystallography and Scattering Methods
Effectiveness
Enthalpy
food chain
Food chains
Free energy
Graphene
graphene oxide
Health hazards
hydrogen
Hydrogen bonding
Isotherms
Materials for Life Sciences
Materials Science
Organophosphorus compounds
Pesticides
phosmet
Polymer Sciences
Solid Mechanics
sorption isotherms
temperature
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Summary:The removal of organophosphorus pesticides is the growing concern. The pesticides are biomagnified in food chain, causing greater health hazards to humans and animals. Adsorption is one of the most efficient approaches for removal of organophosphorus compounds. The current study describes the adsorptive removal of phosmet by silylated graphene oxide (sGO). The adsorption study was performed by batch adsorption method by varying pH, temperature, dosage, contact time, etc. The isotherm studies were also performed to reveal the nature of adsorption. The mechanism of adsorption of phosmet was studied on synthesized and well-characterized sGO. The functionalized derivative of graphene oxide, sGO, has improved biocompatibility and removal efficiency against phosmet. The phenomenon of adsorption is dominantly chemi-physiosorption as suggested from Freundlich isotherm and pseudo-second-order kinetics. The thermodynamics studies further showed that the negative enthalpy and negative Gibb’s free energy is indicative of feasibility of adsorption by chemisorption mechanism. The pH studies indicated that the adsorption of sGO on phosmet was highest at neutral as well as basic pH. Finally, the regeneration studies showed that the adsorbent can be utilized till five cycles, where the efficiency is reduced to 50%. Thus, the complete study gives an account of effective removal of phosmet using sGO as an adsorbent by chemisorption involving pi–pi interaction, hydrogen bonding, and electrostatic forces as major interactive forces. Graphical Abstract
ISSN:0022-2461
1573-4803
DOI:10.1007/s10853-024-09888-8