Characterization of structural and physical properties of dichloromethane= and methanol-fractionated Kraft lignin and its adsorption capacity of Cu (II) and Ni (II) ions

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F70883521%3A28610%2F16%3A43874333" target="_blank" >RIV/70883521:28610/16:43874333 - isvavai.cz</a>
Result on the web
<a href="http://www.tandfonline.com/doi/abs/10.1080/19443994.2015.1036364" target="_blank" >http://www.tandfonline.com/doi/abs/10.1080/19443994.2015.1036364</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1080/19443994.2015.1036364" target="_blank" >10.1080/19443994.2015.1036364</a>

Result language
angličtina
Original language name
Characterization of structural and physical properties of dichloromethane= and methanol-fractionated Kraft lignin and its adsorption capacity of Cu (II) and Ni (II) ions
Original language description
This work investigates the effect of the molecular weight and polydispersity of Kraft lignin(KL) on its capacity to remove copper and nickel ions from aqueous solutions. KL and its fractions were characterized by gel permeation chromatography, H-1 NMR, P-31 NMR and attenuated total reflectanceFourier transform infrared spectroscopy, elemental and ash analyses. Moreover, the glass transition temperature of lignin samples was determined by dynamic mechanical analysis. The fractionated lignin exhibited lower molecular weight and narrower polydispersity than the original KL. Accordingly, the successive solvent extraction herein applied would appear to be a convenient way to extract low molecular fractions admixed with sulphur from KL. A pseudo-second-order rate model was utilized to describe the sorption kinetics of metal ions. The KL fractionated with dichloromethane and methanol possessed a greater capacity for copper and nickel sorption than the original KL. Maximum uptake was 5.94mg of copper and 7.95mg of nickel per gram of the fractionated KL. The results obtained demonstrate that molecular weight characteristics can influence the metal scavenging efficiency of the KL.
Czech name
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Czech description
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Type
J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
CD - Macromolecular chemistry
OECD FORD branch
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Project
<a href="/en/project/ED2.1.00%2F03.0111" target="_blank" >ED2.1.00/03.0111: Centre of Polymer Systems</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2016
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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