Nano-activated carbon derived from date palm coir waste for efficient sequestration of noxious 2,4-dichlorophenoxyacetic acid herbicide.

Chemosphere
K RambabuFawzi Banat

Abstract

Alarming water contamination rates by toxic herbicides have drawn attention to treat these pollutants using efficient, easy, and economic techniques. In this work, date-palm coir (DPC) waste-based nano-activated carbon (DPC-AC) was successfully prepared and examined for adsorptive removal of toxic 2,4-dichlorophenoxyacetic acid (2,4-DPA) herbicide from synthetic wastewater. The DPC-AC was synthesized via a single-step carbonization-KOH activation approach. The nanosorbent displayed a flaky morphology with graphitic structure and oxygen-rich surface functionalities. The nanocarbon with a mean particle size of 163 nm possessed a high specific surface area of 947 m2/g with an average pore size of 2.28 nm. High 2,4-DPA removal efficiency of 98.6% was obtained for the optimal adsorption conditions of pH 2, dosage 0.15 g, rotational speed 100 rpm, time 90 min, and initial 2,4-DPA concentration of 100 mg/L. Langmuir isotherm best described the equilibrium behavior with a theoretical maximum of 50.25 mg/g adsorption capacity for the system. Pseudo-second order model was more appropriate in quantifying the kinetics for all initial feed concentrations. Thermodynamically, the adsorption process was spontaneous, endothermic, and involved l...Continue Reading

References

Aug 19, 2015·The Science of the Total Environment·Mahmoud M Abdel DaiemRaúl Ocampo-Pérez
Jan 27, 2019·Journal of Bioscience and Bioengineering·Rambabu KrishnamoorthyPau Loke Show
May 2, 2019·Environmental Science and Pollution Research International·Fernando Manzotti de SouzaMelissa Gurgel Adeodato Vieira
Jun 4, 2019·Nanotechnology·Theerthagiri JayaramanHyun-Seok Kim
Nov 7, 2019·Chemosphere·Natana Raquel ZuanazziElton Celton Oliveira
Jan 28, 2020·Ultrasonics Sonochemistry·Jayaraman TheerthagiriBruno G Pollet
Oct 6, 2020·International Journal of Phytoremediation·Dilek Angın, Sinem Güneş

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