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Removal of lead in water by potassium hydroxide-activated biochar developed from Syzygium cumini stem.
- Source :
- Discover Chemical Engineering; 7/3/2024, Vol. 4 Issue 1, p1-18, 18p
- Publication Year :
- 2024
-
Abstract
- Lead (Pb) contamination in water poses a significant threat to public health across the globe which requires effective remediation strategies. The main objective of this study is to achieve a removal efficiency of Pb(II) ions from aqueous media using activated Syzygium cumini (java plum) stem biochar. It was prepared by slow pyrolysis at 400 °C after treating the biomass with potassium hydroxide for activation. These biochars were characterized thoroughly (SEM, SEM–EDX, TEM, FTIR, XRD, elemental analyses, and SBET) to conduct a set of batch experiments. The effect of several parameters such as pH, temperature, contact time, adsorbent dosage, initial lead concentrations, and co-existing ions were explored. The decrease in starting lead concentrations from 50 to 10 mg L<superscript>−1</superscript> resulted in improved removal efficiency. The removal effectiveness of activated biochar was 97%, but non-activated biochar was just 19%. Lead adsorption increased considerably as pH increased from 3 to 5. Further, the activated biochar was optimized through various isotherms models, kinetic equations, and thermodynamic analysis. It was observed that the pseudo-second-order kinetic model and Temkin isotherms were the best-fitted models that identify the mechanism of chemisorption and monolayer sorption. According to this study, activated biochar is a promising biosorbent for removing lead from an aqueous solution. [ABSTRACT FROM AUTHOR]
- Subjects :
- LEAD in water
BIOCHAR
LEAD
SYZYGIUM
WATER pollution
POTASSIUM
Subjects
Details
- Language :
- English
- ISSN :
- 27307700
- Volume :
- 4
- Issue :
- 1
- Database :
- Complementary Index
- Journal :
- Discover Chemical Engineering
- Publication Type :
- Academic Journal
- Accession number :
- 178276584
- Full Text :
- https://doi.org/10.1007/s43938-024-00056-7