Development of activated carbon from sawdust by pyrolysis and methylene blue adsorption

Abstract

In this study, activated carbon was developed from saw-dust by pyrolysis. The activated carbon was characterized for elemental composition, morphology and surface chemistry. The potential of the prepared activated carbon for the removal of methylene blue (MB) from aqueous solution was investigated. Batch adsorption experiments were conducted to evaluate the adsorption isotherm, kinetic and thermodynamic of MB onto saw-dust activated carbon. The MB removal efficiency was 99.2% and the Lamgmuir isothermal model having correlation coefficient (R 2) of 0.98 gave the best fit. The kinetics of MB adsorption onto activated carbon was described with the pseudo second order model indicates the dominance of chemisorption mechanism. Thermodynamic parameters showed that the adsorption of MB on saw dust activated carbon adsorbent was endothermic in nature and a non-spontaneous process. The activation energy of 34.7 kJ/mol further reveals that the adsorption process was chemisorption. Generally, the results suggest that the saw-dust activated carbon is a viable adsorbent for effective removal of MB from wastewater effluent contaminated with dye.

Preparation of Activated Carbon Adsorbent From Coconut Husk for the Adsorption of Lead (Ii) Ions From Aqueous Solution

“…The percentage of Pb (II) ions removed increases gradually for both modified and unmodified adsorbent as initial metal ion concentration increases until equilibrium is attained as shown in Figure 3. This is because at higher initial metal ion concentration, the active site of the adsorbent would be surrounded with more metal ions which get locked-up in the free pores of the adsorbent and the trapping pores becomes limited for adsorption to occur (Jock et al 2021).…”

Efficient Adsorption and Mechanism of Organic Dyes on Freeze‐Dried Graphene

“…[1] Water contamination has become one of the most serious issues for the global environment. [2] To the best of our knowledge, the organic dyes, such as rhodamine B (RhB), methyl blue (MB) etc., are existing in most of the water contamination, which is produced by printing and dyeing. Every year, a large amount of these wastewater is discharged into the environment, which is harmful to flora and fauna, even some of them and their products with mutagenic or carcinogenic influence on human being.…”

“…In the past few years, as the most precious resource for human existence, water resources are facing unprecedented challenges [1] . Water contamination has become one of the most serious issues for the global environment [2] . To the best of our knowledge, the organic dyes, such as rhodamine B (RhB), methyl blue (MB) etc., are existing in most of the water contamination, which is produced by printing and dyeing.…”

Fabrication of Size-Controlled MOF-74-Derived Porous Nanospheres toward Efficient Water Treatment

“…Water is contaminated by a variety of organic pollutants, including hormones, pesticides, phenols, and personal care and hygiene products due to the intensification of human activities and the quick expansion of contemporary industry. − Currently, chemical precipitation, membrane separation, adsorption, ion exchange, and photodegradation are some of the techniques used to remove these pollutants. − The adsorption technique is one of them and is regarded as effective, reusable, cheap, and ecologically benign . Activated carbon, zeolite, clay, nanoadsorbent, and other adsorption materials are now employed in the adsorption process. − However, the development of the adsorbent itself is constrained because these adsorbents frequently have adsorption properties for only a particular pollutant. Finding an adsorbent material with great adsorption capability and universality is, therefore, a significant task.…”