Open AccessPreparation of phosphoric acid activated carbons from Canarium Schweinfurthii Nutshell and its role in methylene blue adsorption
Author(s) -
Surajudeen Olawale Adegboyega,
A Ajayi Olusegun,
Sunday Olakunle Michael,
Thaddeus Ityokumbul Mku,
Sunday Adefila Sam
Publication year - 2015
Publication title -
journal of chemical engineering and materials science
Language(s) - English
Resource type - Journals
ISSN - 2141-6605
DOI - 10.5897/jcems2015.0219
Subject(s) - phosphoric acid , activated carbon , methylene blue , adsorption , nuclear chemistry , chemistry , bet theory , yield (engineering) , nitrogen , carbon fibers , specific surface area , organic chemistry , materials science , catalysis , composite number , photocatalysis , metallurgy , composite material
Activated carbons were prepared by phosphoric acid activation of Canarium Schweinfurthii spent nutshell. The activation conditions for particles with average diameter of 2.36 mm, conducted in nitrogen chamber, were evaluated at 40 and 60% acid concentration, substrate/activating agent (impregnation) ratio of 1:1 to 1:4, activation time of 20 to 60 min and temperatures of 200 and 400°C. The results showed that the yield, BET surface area and adsorption capacities of activated carbon produced increased with impregnation ratio, activation time and temperatures. The activated carbon obtained using 1:4 impregnation ratios at 60 min with 40 wt% acid solution have BET surface area and adsorption capacity of 741 m2/g and 8.5 gMB/g Carbon while those for 60wt% acid solution were determined as 779 m2/g and 9.2 gMB/g Carbon, respectively. Key words: Canarium schweinfurthii, activated carbon, phosphoric acid, methylene blue, impregnation ratio, dyes.
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