Adsorptive removal of heavy metal ions by activated carbons

Adsorptive removal of heavy metal ions by activated carbons

CARBON 49 (2011) 3392– 3393 Adsorptive removal of heavy metal ions by activated carbons 3393 Ordered mesoporous carbons were synthesized by using a...

29KB Sizes 3 Downloads 138 Views

CARBON 49 (2011) 3392– 3393

Adsorptive removal of heavy metal ions by activated carbons

3393

Ordered mesoporous carbons were synthesized by using an

Motoi Machidaa,b, Yoshimasa Amanoa,b, Masami Aikawac

organic-organic self-assembly (soft-templating) method using

a

Resorcinol (R) / formaldehyde (F) and triblock copolymer Pluronic

Safety and Health Organization, Chiba University: 1-33 Yayoi-cho,

Inage-ku, Chiba 263-8522, Japan b

Graduate School of Engineering, Chiba University: 1-33 Yayoi-cho,

Inage-ku, Chiba 263-8522, Japan c

Faculty of Science, Kisarazu National College of Technology: 2-11-1

Kiyomidai-higashi, Kisarazu, Chiba 292-0041, Japan Heavy metal removal from aqueous solution onto activated carbons (ACs) by adsorption is briefly reviewed from the aspects of the structure, surface chemistry of ACs, and temperature and pH of aqueous solutions based on our previous studies. Oxygen and nitrogen atoms on the AC surface play an important role as well as solution pH for the adsorption of the heavy metal ions on ACs. In spite of the small uptake amounts of heavy metals

F127. A hexagonal mesostructure with channel like pores (COU-1) with a pore size of 4.7-5.8 nm and a 3D wormhole-like mesopore structure (COU-2) with a pore size of 4.8 nm were synthesized using precursor solutions with different mass ratios of F127/RF resin. The mesoporous carbons were activated by using KOH to improve their porosity. The KOH-activated COU-2 carbon showed superior capacitance compared to the COU-2 carbon and a commercial microporous carbon. Ultrathin carbon films with a monolayer of uniform mesopores were also synthesized on a silicon substrate by contacting a triblock copolymer film with a benzyl alcohol vapor followed by carbonization. [TANSO 2011 (No.247), 70–74] doi:10.1016/j.carbon.2011.04.012

indicated so far by ACs, there seems to be much room to study for increasing the adsorption capacity. ACs would still have a high potential for the removal of ionic pollutants in aqueous solution due to their availability and easy regeneration.

Manufacturing process, characterization and application

[TANSO 2011 (No.247), 62–69]

of acetylene black Tetsuya Wada

doi:10.1016/j.carbon.2011.04.011

Denki Kagaku Kogyo Kabushiki Kaisha: 2-1-1 Nihonbashi-muromachi, Chuo-ku, Tokyo 103-8338, Japan

Synthesis of ordered mesoporous carbons by a soft-templating

No abstract provided

method

[TANSO 2011 (No.247), 75–79]

Norikazu Nishiyamaa, Shunsuke Tanakab a

Graduate School of Engineering Science, Osaka University: 1-3 Mach-

ikaneyama-cho, Toyonaka-shi, Osaka 560-8531, Japan b

Department of Chemical, Energy and Environmental Engineering,

Faculty of Environmental and Urban Engineering, Kansai University: 3-3-35 Yamate-cho, Suita-shi, Osaka 564-8680, Japan

doi:10.1016/j.carbon.2011.04.013