Kinetic and isotherm adsorption studies of methylene blue on sulfuric acid treated spent grated coconut (Cocos nucifera)

• Published in: Advanced Materials Research
• Main Author: Khalid K.; Hanafiah M.A.K.M.
• Format: Conference paper
• Language: English
• Published: Trans Tech Publications Ltd 2014
• Online Access: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84904181893&doi=10.4028%2fwww.scientific.net%2fAMR.970.192&partnerID=40&md5=3e758eea8e394228bb8025efcf8caffc

A new biosorbent, sulfuric acid (H2SO4) treated spent grated coconut (Cocus nucifera) (SSGC) showed a good ability to remove methylene blue (MB) from aqueous solutions. Equilibrium time was achieved within 300 min for all MB concentrations, and the kinetic data was best modeled by pseudo second-order. The adsorption data fitted the Langmuir isotherm model, suggesting monolayer coverage of MB over a homogeneous adsorbent surface. The experimental maximum adsorption capacity was 366.50 mg/g, obtained at 318 K, adsorbent dosage of 0.6 g/L and at pH 6. The attachment of MB on SSGC was confirmed by Fourier Transform Infrared (FTIR) spectroscopy. © (2014) Trans Tech Publications, Switzerland.