Production of Activated Carbon and Characterization from Snail Shell Waste (<i>Helix</i> <i>pomatia</i>)

Abstract

Snail shell waste (Helix pomatia) has been evaluated as raw material for the preparation of activated carbon using ZnCl 2 and CaCl 2 with the temperature ranging from 500˚C to 800˚C. The activated carbon prepared was characterized, showing effect of temperature on ash content, pore volume and porosity. The adsorption isotherm for methylene blue was carried out on the activated carbon in a batch study. The adsorbent exhibited excellent adsorption for methylene blue. The experimental data were used for both Langmuir and Freundlich models. The adsorption coefficients of Langmuir isotherm were found to be 0.996 and 0.957 for CaCl 2 and ZnCl 2 while 0.969 and 0.962 were obtained for the Freundlich isotherm respectively. The value of R L was found to be 0.75 and 0.38 for samples CC and ZZ respectively, which is an indication that activated carbon impregnated with CaCl 2 and ZnCl 2 is favourable for adsorption of methylene blue under the conditions used in this study.

Effectiveness of Coconut Shell Activated Carbon Filter Material Produced Under Various Carbonization and Activation Conditions

“…This shows clearly that ash content reduces with increase in carbonization temperature (at uniform carbonization time) and activation time (at uniform activation temperature). This result tallies with the findings of Gumus and Okpeku (2015) that increase in carbonization temperature reduces the ash content.…”

“…The content was then superficially dried and weighed (Appendix D). Pore volume was determined by dividing the increase in weight of the sample by the density of water (Gumus and Okpeku, 2015).…”

Determination of Optimum Conditions for the Production of Activated Carbon Derived from Separate Varieties of Coconut Shells

“…Gratuito et al [5] carried out process optimization of activated carbon yield produced from coconut shells using RSM. Different methods are available for producing activated carbon but for specific industrial application, a solid adsorbent with wide pore size distribution can be preferably obtained via chemical activation [6]. Activated carbons obtained from snail shells and apple peels were discussed [6,7].…”

Equilibrium Isotherm, Kinetic and Thermodynamic Studies of the Adsorption of Erythrosine Dye onto Activated Carbon from Coconut Fibre

“…It was chemically activated by weighing 100gram of the ground carbonized coconut fibre in 300 ml of 0.1M HCl solution, thoroughly mixed and heated until it formed slurry. The slurry was transferred to a crucible and heated in a furnace (SX-5-12) at 800˚C for 3 hours and allowed to cool to room temperature and washed with de-ionized water, dried in an oven (MINO/75/F/DIG) at 110˚C for 2 hours [3]. o C in a temperature controlled water bath with constant shaking.…”