Exploring the
Role of Carbon Nanosheets for Detoxification of Cr(VI) from Aqueous Solution
Kant Madhur, Khatoon Fehmeeda and Sen Mousumi
Res. J. Chem. Environ.; Vol. 28(3); 70-77;
doi: https://doi.org/10.25303/283rjce070077; (2024)
Abstract
Toxic pollutants in wastewater must be reduced in order to protect the aquatic ecosystem's
stability and the public's health. Finding affordable and effective technologies
for treating municipal, horticultural, aquacultural and industrial wastewater is
urgently needed. Nitrogen-doped carbon nanosheets (N-CNS), which are produced by
hydrothermal reaction from glycerol, sulfuric acid and melamine, have strong adsorptive
behaviour against hazardous aqueous pollutants such as heavy metals and organic
compounds. The overall elemental composition of CNS is altered by nitrogen incorporation,
favouring CNS interaction with pollutants. The objective of the current investigation
was to investigate the possibility for Chromium(VI) [Cr(VI)] adsorption on the CNS
from a liquid solution.
The ideal pH for Cr (VI) adsorption was noted to be 2.0. The Cr(VI) adsorption was
enhanced when the starting metal concentration is more up to 700 mg L-1. A maximum
removal of 256.41 mg g-1was seen when pH was 2.0 at 700 mg L-1 initial Cr(VI) concentration.
We employed both the Freundlich and the Langmuir adsorption isotherms to determine
the adsorption equilibrium constants. Using fitting curves and correlation coefficients
(R2), it has been found that the model of the Langmuir isotherm is a best fit and
it indicates homogeneous surface of CNS.
