Abstract:
:Mesoporous activated carbon was prepared using a hydrochar derived from coconut shell waste through hydrothermal carbonization and NaOH chemical activation process (COSHTC). Three sets of activated carbons were obtained with different hydrochar:NaOH impregnation ratios (1:1, 1:2, and 1:3). Among these ratios, 1:3 (COSHTC3) exhibited the optimum adsorption for methylene blue (MB). COSHTC3 adsorbed MB with an initial concentration of 25-250 mg/L at pH 3-11 and 30 °C. The adsorption isotherm of MB on COSHTC3 demonstrated that Langmuir isotherm could be better applied at a maximum monolayer adsorption capacity of 200.01 mg/g at 30 °C. The data was well fitted to the pseudo-second-order (PSO) kinetic model. These results show that the COSHTC3 prepared from low-cost agricultural waste (coconut shell) with average pore diameter 28.6 Å and surface area 876.14 m2/g acts as a better adsorbent for removal of cationic dyes and could pave the way for more low-cost adsorbents for dye removal.
journal_name
J Environ Managejournal_title
Journal of environmental managementauthors
Islam MA,Ahmed MJ,Khanday WA,Asif M,Hameed BHdoi
10.1016/j.jenvman.2017.07.029subject
Has Abstractpub_date
2017-12-01 00:00:00pages
237-244issue
Pt 1eissn
0301-4797issn
1095-8630pii
S0301-4797(17)30695-3journal_volume
203pub_type
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