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

Kód výsledku v 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>

Výsledek na webu

<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>

Jazyk výsledku

angličtina

Název v původním jazyce

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

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

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

Popis výsledku anglicky

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.

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

CD - Makromolekulární chemie

OECD FORD obor

—

Projekt

<a href="/cs/project/ED2.1.00%2F03.0111" target="_blank" >ED2.1.00/03.0111: Centrum polymerních systémů</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2016

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Desalination and Water Treatment

ISSN

1944-3994

e-ISSN

—

Svazek periodika

57

Číslo periodika v rámci svazku

23

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

9

Strana od-do

10655-10663

Kód UT WoS článku

000371183300019

EID výsledku v databázi Scopus

2-s2.0-84958913189