Abstract:
Saccharum munja biochar prepared by slow pyrolysis method was loaded with hematite nanomaterial and utilized for uptake of cadmium from aqueous environment. Characterization of raw Saccharum munja, Saccharum munja biochar and hematite loaded Saccharum munja biochar were carried out through SEM and FTIR. SEM revealed porous structure, rough irregular sites more prevalent on nanosorbents surface compared to raw and biochar form of sorbents. FTIR exposed surface functional groups for cadmium removal. Adsorption experiments were performed by applying different parameters, like concentration, time and temperature, with percentage removal efficiency as 72 ppm, 67.73 ppm, 48.7 ppm for Hematite loaded Saccharum munja biochar, Saccharum munja biochar and raw Saccharum munja respectively. Which revealed efficient adsorption results of nanosorbents with more exposed sites. These experimental data were used for evaluation of isotherms for which linear and non-linear form of Freundlich isotherm exposed best fit values with high value of R2 = 0.9, error analysis, kinetic studies and thermodynamics. Thermodynamic studies showed appropriate, spontaneous and endothermic adsorption method. While, change in enthalpy values less than 80 kJ/mole showed physical sorption and positive entropy change values described enhanced sorption. Adsorption kinetic models were investigated to discover rate constants and feasible order of reaction. Data fitted best into type I of pseudo second order kinetics as indicated by values of correlation constants R2 = 0.98 and rate constants K2 (0-1).
Page(s):
0-0
DOI:
DOI not available
Published:
Journal: First International Conference on Revamped Scientific Outlook of 21st Century (Abstract Book), Volume: 0, Issue: 0, Year: 2022
Keywords:
FTIR
,
Adsorption studies
,
Enthalpy change
,
Cadmiun