Adsorption dynamics of methyl violet onto granulated mesoporous carbon: Facile synthesis and adsorption kinetics.
A new and facile one-step synthesis method for preparing granulated mesoporous carbon (GMC) with three-dimensional spherical mesoporous symmetry is prepared to remove large molecular weight organic compounds in aqueous phase. GMC is synthesized in a single step using as-synthesized mesoporous carbon particles and organic binders through a simple and economical synthesis approach involving a simultaneous calcination and carbonization process. Characterization results obtained from SEM, XRD, as well as surface and porosity analysis indicate that the synthesized GMC has similar physical properties to those of the powdered mesoporous carbon and maintains the Brunauer-Emmett-Teller (BET) surface area and pore volume because the new synthesis method prevents the collapse of the pores during the granulation process. Batch adsorption experiments revealed GMC showed a substantial adsorption capacity (202.8 mg/g) for the removal of methyl violet as a target large molecular contaminant in aqueous phase. The mechanisms and dynamics modeling of GMC adsorption were also fully examined, which revealed that surface diffusion was rate limiting step on adsorption process of GMC. Adsorption kinetics of GMC enables 3 times faster than that of granular activated carbon in terms of surface diffusion coefficient. This is the first study, to the best of our knowledge, to synthesize GMC as an adsorbent for water purification by using facile granulation method and to investigate the adsorption kinetics and characteristics of GMC. This study introduces a new and simple method for the synthesis of GMC and reveals its adsorption characteristics for large molecular compounds in a water treatment.
Department of Radiation Protection and Radioactive Waste Safety, Korea Institute of Nuclear Safety, 62 Gwahak-ro, Yuseong-gu, Daejeon 34142, Republic of Korea. Electronic address: wdd3590@gmail.com.
Yohan
Y
Kim
School of Environmental Science and Engineering, Gwangju Institute of Science and Technology, 1 Oryong-dong, Buk-gu, 500-712 Gwangju, Republic of Korea.
Jiyeol
J
Bae
Research Center for Membranes, Korea Research Institute of Chemical Technology (KRICT), Daejeon 305-600, Republic of Korea.
Hosik
H
Park
Research Center for Membranes, Korea Research Institute of Chemical Technology (KRICT), Daejeon 305-600, Republic of Korea.
Jeong-Kwon
JK
Suh
Research Center for Membranes, Korea Research Institute of Chemical Technology (KRICT), Daejeon 305-600, Republic of Korea.
Young-Woo
YW
You
School of Environmental Science and Engineering, Gwangju Institute of Science and Technology, 1 Oryong-dong, Buk-gu, 500-712 Gwangju, Republic of Korea. Electronic address: hcchoi@gist.ac.kr.
Heechul
H
Choi
D000327:Adsorption; D002244:Carbon; D005840:Gentian Violet; D007700:Kinetics; D018508:Water Purification
D002244:Carbon; D005840:Gentian Violet
Adsorption dynamics; Granulation; Mesoporous carbon; Methyl violet