<P><B>Abstract</B></P> <P>Poly(acrylo-amidino diethylenediamine) (PADD), fibrous form of anion exchangers, was synthesized to remove Cr(VI). The experimental results were described well by the Langmuir isotherm model (Q&...
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https://www.riss.kr/link?id=A107416599
2018
-
KCI등재,SCOPUS,SCIE
학술저널
187-195(9쪽)
0
상세조회0
다운로드다국어 초록 (Multilingual Abstract)
<P><B>Abstract</B></P> <P>Poly(acrylo-amidino diethylenediamine) (PADD), fibrous form of anion exchangers, was synthesized to remove Cr(VI). The experimental results were described well by the Langmuir isotherm model (Q&...
<P><B>Abstract</B></P> <P>Poly(acrylo-amidino diethylenediamine) (PADD), fibrous form of anion exchangers, was synthesized to remove Cr(VI). The experimental results were described well by the Langmuir isotherm model (Q<SUB>max</SUB> =4.67mmol/g) and pseudo second-order model. The Cr(VI) adsorption capacities were increased by decreasing pH because the –NH<SUB>2</SUB> in PADD become more positively charged. During five regeneration cycles, Cr(VI) adsorption capacity retained over 95.96% of the initial capacity. Color of the PADD (yellow) changed to green owing to Cr(VI) reduction to Cr(III) and amine transformed into a oxidized form (imine). The PADD was successfully treated Cr(VI) in two different concentrations of industrial wastewater.</P> <P><B>Highlights</B></P> <P> <UL> <LI> PADD was successfully synthesized by chemical grafting of polyacrylonitrile fiber. </LI> <LI> Cr(VI) adsorption on PADD is rapid process with maximum capacity of 4.67mmol/g. </LI> <LI> High Cr(VI) adsorption capacity of PADD is maintained in flow-through condition. </LI> <LI> Cr(VI) adsorption capacity of PADD is retained during five regeneration steps. </LI> <LI> PADD can treat well with a real plating wastewater containing Cr(VI). </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>
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