http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
( Sadanand Pandey ),강미숙 한국공업화학회 2019 한국공업화학회 연구논문 초록집 Vol.2019 No.0
Gum polysaccharides are one of the most abundant bio-based polymers. This study demonstrates the synthesis of locust bean gum-cl-poly (acrylonitrile) based hydrogel were obtained using acrylonitrile monomer, MBA as crosslinker and APS as initiator by involving free radical co-polymerization and crosslinking reaction technique. The factors influencing the adsorption capacities, including the initial concentrations of dye solutions, contact time, initial pH values and dosage of the adsorbent as well as ionic strength of the solution are discussed. The locust bean gum-cl-poly(acrylonitrile) based hydrogel was found to be pH sensitive. The kinetics studies show that the adsorption of the dye fitted a pseudo-second-order equation.
( Sadanand Pandey ),강미숙 한국공업화학회 2019 한국공업화학회 연구논문 초록집 Vol.2019 No.0
Bioadsorption is emerging as a potential alternative to conventional technologies for the adsorption of metal ions from aqueous solutions. In the present project, graft polymerization was employed to synthesis a novel adsorbent using diethylamino ethyl methacrylate (DEAEMA) and locust bean gum (LBG) for metal ion removal from aqueous solution. The LBG was rapidly grafted with diethylamino ethyl methacrylate (DEAEMA) under microwave heating. The results demonstrate diethylamino ethyl methacrylate grafted locust bean gum (mwLBG-g-DEAEMA) absorbent had the universality for removal of metal ion through the chemical adsorption mechanism. This work will encourage researchers to focus on this facile green technique for the synthesis of adsorbent with enhanced adsorption and mechanical properties.
Pandey, Sadanand,Do, Jeong Yeon,Kim, Joonwoo,Kang, Misook Elsevier 2020 INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES Vol.143 No.-
<P><B>Abstract</B></P> <P>For the first time, stable LBG-cl-Poly(DMAAm) hydrogel is prepared via free radical in situ polymerization of <I>N</I>, <I>N</I>-dimethyl acrylamide by employing <I>N</I>, <I>N</I>′-methylene bis(acrylamide) as cross-linkers. The hydrogel was characterized by different physicochemical techniques like equilibrium swelling percentage, point of zero charges (pH<SUB>PZC</SUB>), FTIR, SEM, and TGA. The LBG-cl-Poly(DMAAm) hydrogel was used in experiments on swelling behavior and adsorption of water-soluble cationic dye-Brilliant green (BG). The influence of pH on the structural change of BG dye was discussed. The swelling of hydrogel was sensitive toward the pH, ionic strength, and temperature stimuli. Adsorption behavior of hydrogel was investigated for the adsorption of BG dye and it was found to highly efficient in removing 97.7% of BG dye in 50 mg L<SUP>−</SUP> <SUP>1</SUP> of dye solution. Adsorption data displayed that the adsorption of BG followed the pseudo-second-order kinetic model (R<SUP>2</SUP> = 0.998) and Langmuir isotherm model (R<SUP>2</SUP> = 0.988) with a maximum adsorption capacity of 142.85 mg g<SUP>−</SUP> <SUP>1</SUP>. The developed LBG-cl-Poly(DMAAm) hydrogel demonstrated efficient separation of BG dye and maintained maximum adsorption capacity after 6th regeneration cycles. The results indicated that LBG-cl-Poly(DMAAm) hydrogel can be used as an alternative and promising adsorbent to be applied in the treatment of effluents containing the BG dye.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Successful synthesis of highly cost effective locust bean gum based hydrogel </LI> <LI> Influence of pH on the structural change of BG dye </LI> <LI> Thermal analysis showed hydrogel as thermally more stable than natural LBG. </LI> <LI> LBG-cl-Poly(DMAAm) hydrogel shows maximum %G and %SR of 318 and 3200, respectively. </LI> <LI> Hydrogel showed a rapid dye adsorption rate and a high absorption capacity at RT. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>