Single and competitive sorption potential of date seed‐derived biochar during removal of lead (II) and cadmium (II) ions.

Autor: Saravanakumar, Krishnan1 (AUTHOR) drsara.soh@cas.edu.om, Naveen Prasad, Balakrishna Sankari2 (AUTHOR), Senthilkumar, Ramalingham1 (AUTHOR), Reddy Prasad, Donipathi Mogili3 (AUTHOR), Venkatesan, D.4 (AUTHOR)
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Zdroj: Environmental Progress & Sustainable Energy. Nov2021, Vol. 40 Issue 6, p1-10. 10p.
Abstrakt: The current research was performed to examine the effects of date seed‐derived biochar (DSDB) for remediation of hazardous metal ions (lead (II) and cadmium (II)) from binary and single systems. The maximum sorption uptakes of 0.484 and 0.798 mmol/g were recorded for lead (II) and cadmium (II) ions, respectively, at an equilibrium pH of 4.5. For both metal ions, DSDB produced quick kinetic uptake rates with most of the removal process (90%) completed within 60 mins. Different types of models were applied to depict lead (II) and cadmium (II) isotherms (Toth, Redlich–Peterson, Freundlich, and Langmuir) and kinetics (pseudo‐first and ‐second order) data. Desorption method was attempted and DSDB was reutilized in five consecutive cycles successfully using 0.01 M HCl as elutant. During binary sorption, decreased uptake of cadmium (II) by DSDB was observed due to the presence of lead (II). In comparison to single solute system, the uptake of cadmium (II) was reduced to 26.5% while only 1.2% reduction for lead (II) was observed. While comparing the two multi‐component isotherm models (Langmuir and Freundlich), the multicomponent Langmuir model performed well in describing the cadmium (II)+lead (II) binary isotherm with high accuracy. [ABSTRACT FROM AUTHOR]
Databáze: GreenFILE
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