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The Treatment of Flexo-inks Wastewater using Powdered Activated Carbon Including Iron-transition Metal  

Cho, Yong-Duck (Eco HighTech)
Yoon, Won-Jung (Dept. of Chemical & Bio Engineering, Kyungwon University)
Kang, Ik-Joong (Dept. of Chemical & Bio Engineering, Kyungwon University)
Yoo, In-Sang (Dept. of Chemical & Bio Engineering, Kyungwon University)
Lee, Sang-Wha (Dept. of Chemical & Bio Engineering, Kyungwon University)
Publication Information
Journal of Korean Society on Water Environment / v.22, no.6, 2006 , pp. 996-1003 More about this Journal
Abstract
The absorption characteristics of powdered activated carbon doped by transition-metal nanoparticles were investigated to enhance the remove efficiencies of $TCOD_{Mn}$ and Color from the flexo-inks wastewater. According to the adsorption dynamics of PAC and MPAC, the optimal dosage of activated-carbon adsorbents was 3 g/L under the reaction conditions of pH6.0, 30 mill of reaction time, 240 rpm of mixing intensity. The removal efficiencies by the optimal dosages were maximized as 19% $TCOD_{Mn}$, 57% Color for PAC and 88% $TCOD_{Mn}$, 95% Color for MPAC. Freundlich indexes of isotherm absorption were estimated as follows: i) For PAC, k=-8.11, 1/n=2.98, r=0.91 in the raw water, and k=0.14, b/n=0.75, r=0.96 in the biological treatment water, ii) For MPAC, k=2.69, 1/n=0.21, r=0.80 in the raw water, and k=0.74, 1/n=1.17, r=0.95 in the biological treatment water. MPAC (Powdered activated carbon doped by transition-metal nanoaprticles) was very effective in the removal of organics from the raw water and biological treatment water, as Freundlich indexes of 1/n for both types of water were estimated less than 2.0.
Keywords
Adsorption kinetic; Flexo-inks; Isotherm adsorption; Nanoparticles; Powdered activated carbon; Transition-metal;
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