Journal
SEPARATION SCIENCE AND TECHNOLOGY
Volume 54, Issue 1, Pages 27-41Publisher
TAYLOR & FRANCIS INC
DOI: 10.1080/01496395.2018.1504794
Keywords
Activated carbon; Methylene Blue (MB); Baobab fruit shells (BFS); isotherms; kinetics
Funding
- Department of Chemistry, Chancellor College, University of Malawi
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Baobab fruit shell (BFS), a renewable bio-waste from Malawian baobab tree was used as a precursor for the production of a low-cost activated carbon to remove methylene blue (MB) from aqueous solution. Parameters such as contact time, initial methylene blue concentration, adsorbent dose and temperature were studied. The adsorption process can be well described by both Langmuir isotherm and the pseudo-second-order kinetics. The maximum monolayer adsorption capacity of MB dye was ca. 334.45 mg/g. The negative value of the Gibb's free energy and positive value of adsorption enthalpy showed the spontaneous nature and endothermic nature of the adsorption process, respectively.
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