Removal of Some heavy metals Contaminants from Aqueous Solutions By Applying Biomass-Based Modified Activated Carbon
- 24 May 2021
- journal article
- research article
- Published by Egypts Presidential Specialized Council for Education and Scientific Research in Egyptian Journal of Chemistry
- Vol. 64 (10), 5929-5944
- https://doi.org/10.21608/ejchem.2021.72070.3600
Abstract
Activated carbon (AC) has been prepared from rice husk (RH) as an agricultural by-product. Different analytical instruments characterized the prepared activated carbon. Fe3+ and Mn2+ were extracted from the aqueous solution. The effects of many different variables namely, pH effect, reaction time, adsorbent amount, starting concentration of metal ions, interfering ions and temperature on the adsorption of ions were evaluated. The optimal adsorption of Fe3+ and Mn2+ was 3 and 6, respectively. The optimal contact time was determined to be 2 hours for both Fe3+ and Mn2+ ions. The kinetic and thermodynamic of adsorption process was found to be a pseudo-second order for both Fe3+ and Mn2+ ions. The equilibrium data was applicable to Langmuir, and Freundlich isotherm. The correlation coefficient (R2) of both isotherms were 0.99 & 0.89 for Fe3+, respectively and 0.99 & 0.77 for Mn2+, respectively. The obtained data predicted also that; the endothermic system governs the adsorption process. Furthermore, the maximum adsorption capacities for Fe3+ and Mn2+ were 72.2 & 49.6 mg/g, respectively and the removal of metal ions were 90.12 & 83.42 %, respectively. Finally, the results revealed that the adsorption process of the two metal ions is consistent with the pseudo-second-order kinetics.Keywords
This publication has 32 references indexed in Scilit:
- Characterization of activated carbon prepared by phosphoric acid activation of olive stonesArabian Journal of Chemistry, 2016
- Improving the Adsorption of Heavy Metals from Water Using Commercial Carbons Modified with Egg Shell WastesIndustrial & Engineering Chemistry Research, 2011
- Removal of manganese ions from synthetic groundwater by oxidation using KMnO4 and the characterization of produced MnO2 particlesWater Science & Technology, 2010
- HemicellulosesAnnual Review of Plant Biology, 2010
- Adsorption behavior of methylene blue onto titanate nanotubesChemical Engineering Journal, 2010
- Synthesis, characterization and performance in arsenic removal of iron-doped activated carbons prepared by impregnation with Fe(III) and Fe(II)Journal of Hazardous Materials, 2009
- Pecan nutshell as biosorbent to remove Cu(II), Mn(II) and Pb(II) from aqueous solutionsJournal of Hazardous Materials, 2009
- Discovery of Lignin in Seaweed Reveals Convergent Evolution of Cell-Wall ArchitectureCurrent Biology, 2009
- Fly ash for the removal of Mn(II) from aqueous solutions and wastewatersChemical Engineering Journal, 2007
- The use of nutshell carbons in drinking water filters for removal of trace metalsWater Research, 2004