Chemical and physical characteristics of optimal synthesised activated carbons from grass-derived sulfonated lignin versus commercial activated carbons

Nasir M A Al-Lagtah, Ala'A H. Al-Muhtaseb, Mohammad N M Ahmad, Yousef Salameh

Research output: Contribution to journalArticle

26 Citations (Scopus)

Abstract

This study aims to evaluate the surface characteristics and chemistry of optimal activated carbons (ACs) synthesised from water-soluble grass-derived sulfonated lignin (SL) using three dehydrating salts (ZnCl2, KCl and Fe2(SO4)3·xH2O). The optimal AC synthesised by each dehydrating salt was chosen as the carbon that achieved the highest removal efficiency of Cd2+, Cu2+ and Zn2+ ions from aqueous solutions. These optimal sulfonated lignin-based activated carbons (SLACs) showed the highest surface areas, total pore and micropore volumes among all the synthesised ACs. These SLACs were named SLAC-ZC (optimal grass-derived SLAC activated by zinc chloride); SLAC-PC (optimal grass-derived SLAC activated by potassium chloride) and SLAC-FS (optimal grass-derived SLAC activated by ferric sulphate). The surface characteristics of two commercial activated carbons (CAC1 and CAC2) were also appraised for comparison purposes. The optimal SLACs showed similar, or even better, properties to the two CACs. The N2 adsorption/desorption isotherms showed that the micropore fraction of SLAC-ZC was greater and its mesopores were narrower than SLAC-PC. For SLAC-FS, the amount of adsorbed N2 was markedly lower than all other ACs and hence its values of BET surface area (ABET) and total pore volume (Vtotal) were the lowest. The iodine volume capacities of SLAC-ZC and SLAC-PC were higher than CAC1, suggesting that they could operate better in continuous adsorption processes. FTIR and SEM analysis illustrated that chemical activation had changed the surface chemistry of SL. Overall; synthesis of ACs from this novel precursor will add value to sulfonated lignin, which is considered as an industrial waste.

Original languageEnglish
Pages (from-to)504-514
Number of pages11
JournalMicroporous and Mesoporous Materials
Volume225
DOIs
Publication statusPublished - May 1 2016

Fingerprint

grasses
lignin
Lignin
activated carbon
Activated carbon
Salts
chemistry
industrial wastes
salts
Industrial Waste
porosity
zinc chlorides
Zinc chloride
Adsorption

Keywords

  • Activated carbon
  • Elemental analysis
  • FTIR analysis
  • Sulfonated lignin
  • Surface characterisation

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials
  • Chemistry(all)
  • Condensed Matter Physics

Cite this

Chemical and physical characteristics of optimal synthesised activated carbons from grass-derived sulfonated lignin versus commercial activated carbons. / Al-Lagtah, Nasir M A; Al-Muhtaseb, Ala'A H.; Ahmad, Mohammad N M; Salameh, Yousef.

In: Microporous and Mesoporous Materials, Vol. 225, 01.05.2016, p. 504-514.

Research output: Contribution to journalArticle

@article{bb070f2c69be485a9817eab3bbbf4702,
title = "Chemical and physical characteristics of optimal synthesised activated carbons from grass-derived sulfonated lignin versus commercial activated carbons",
abstract = "This study aims to evaluate the surface characteristics and chemistry of optimal activated carbons (ACs) synthesised from water-soluble grass-derived sulfonated lignin (SL) using three dehydrating salts (ZnCl2, KCl and Fe2(SO4)3·xH2O). The optimal AC synthesised by each dehydrating salt was chosen as the carbon that achieved the highest removal efficiency of Cd2+, Cu2+ and Zn2+ ions from aqueous solutions. These optimal sulfonated lignin-based activated carbons (SLACs) showed the highest surface areas, total pore and micropore volumes among all the synthesised ACs. These SLACs were named SLAC-ZC (optimal grass-derived SLAC activated by zinc chloride); SLAC-PC (optimal grass-derived SLAC activated by potassium chloride) and SLAC-FS (optimal grass-derived SLAC activated by ferric sulphate). The surface characteristics of two commercial activated carbons (CAC1 and CAC2) were also appraised for comparison purposes. The optimal SLACs showed similar, or even better, properties to the two CACs. The N2 adsorption/desorption isotherms showed that the micropore fraction of SLAC-ZC was greater and its mesopores were narrower than SLAC-PC. For SLAC-FS, the amount of adsorbed N2 was markedly lower than all other ACs and hence its values of BET surface area (ABET) and total pore volume (Vtotal) were the lowest. The iodine volume capacities of SLAC-ZC and SLAC-PC were higher than CAC1, suggesting that they could operate better in continuous adsorption processes. FTIR and SEM analysis illustrated that chemical activation had changed the surface chemistry of SL. Overall; synthesis of ACs from this novel precursor will add value to sulfonated lignin, which is considered as an industrial waste.",
keywords = "Activated carbon, Elemental analysis, FTIR analysis, Sulfonated lignin, Surface characterisation",
author = "Al-Lagtah, {Nasir M A} and Al-Muhtaseb, {Ala'A H.} and Ahmad, {Mohammad N M} and Yousef Salameh",
year = "2016",
month = "5",
day = "1",
doi = "10.1016/j.micromeso.2016.01.043",
language = "English",
volume = "225",
pages = "504--514",
journal = "Microporous and Mesoporous Materials",
issn = "1387-1811",
publisher = "Elsevier",

}

TY - JOUR

T1 - Chemical and physical characteristics of optimal synthesised activated carbons from grass-derived sulfonated lignin versus commercial activated carbons

AU - Al-Lagtah, Nasir M A

AU - Al-Muhtaseb, Ala'A H.

AU - Ahmad, Mohammad N M

AU - Salameh, Yousef

PY - 2016/5/1

Y1 - 2016/5/1

N2 - This study aims to evaluate the surface characteristics and chemistry of optimal activated carbons (ACs) synthesised from water-soluble grass-derived sulfonated lignin (SL) using three dehydrating salts (ZnCl2, KCl and Fe2(SO4)3·xH2O). The optimal AC synthesised by each dehydrating salt was chosen as the carbon that achieved the highest removal efficiency of Cd2+, Cu2+ and Zn2+ ions from aqueous solutions. These optimal sulfonated lignin-based activated carbons (SLACs) showed the highest surface areas, total pore and micropore volumes among all the synthesised ACs. These SLACs were named SLAC-ZC (optimal grass-derived SLAC activated by zinc chloride); SLAC-PC (optimal grass-derived SLAC activated by potassium chloride) and SLAC-FS (optimal grass-derived SLAC activated by ferric sulphate). The surface characteristics of two commercial activated carbons (CAC1 and CAC2) were also appraised for comparison purposes. The optimal SLACs showed similar, or even better, properties to the two CACs. The N2 adsorption/desorption isotherms showed that the micropore fraction of SLAC-ZC was greater and its mesopores were narrower than SLAC-PC. For SLAC-FS, the amount of adsorbed N2 was markedly lower than all other ACs and hence its values of BET surface area (ABET) and total pore volume (Vtotal) were the lowest. The iodine volume capacities of SLAC-ZC and SLAC-PC were higher than CAC1, suggesting that they could operate better in continuous adsorption processes. FTIR and SEM analysis illustrated that chemical activation had changed the surface chemistry of SL. Overall; synthesis of ACs from this novel precursor will add value to sulfonated lignin, which is considered as an industrial waste.

AB - This study aims to evaluate the surface characteristics and chemistry of optimal activated carbons (ACs) synthesised from water-soluble grass-derived sulfonated lignin (SL) using three dehydrating salts (ZnCl2, KCl and Fe2(SO4)3·xH2O). The optimal AC synthesised by each dehydrating salt was chosen as the carbon that achieved the highest removal efficiency of Cd2+, Cu2+ and Zn2+ ions from aqueous solutions. These optimal sulfonated lignin-based activated carbons (SLACs) showed the highest surface areas, total pore and micropore volumes among all the synthesised ACs. These SLACs were named SLAC-ZC (optimal grass-derived SLAC activated by zinc chloride); SLAC-PC (optimal grass-derived SLAC activated by potassium chloride) and SLAC-FS (optimal grass-derived SLAC activated by ferric sulphate). The surface characteristics of two commercial activated carbons (CAC1 and CAC2) were also appraised for comparison purposes. The optimal SLACs showed similar, or even better, properties to the two CACs. The N2 adsorption/desorption isotherms showed that the micropore fraction of SLAC-ZC was greater and its mesopores were narrower than SLAC-PC. For SLAC-FS, the amount of adsorbed N2 was markedly lower than all other ACs and hence its values of BET surface area (ABET) and total pore volume (Vtotal) were the lowest. The iodine volume capacities of SLAC-ZC and SLAC-PC were higher than CAC1, suggesting that they could operate better in continuous adsorption processes. FTIR and SEM analysis illustrated that chemical activation had changed the surface chemistry of SL. Overall; synthesis of ACs from this novel precursor will add value to sulfonated lignin, which is considered as an industrial waste.

KW - Activated carbon

KW - Elemental analysis

KW - FTIR analysis

KW - Sulfonated lignin

KW - Surface characterisation

UR - http://www.scopus.com/inward/record.url?scp=84958167838&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84958167838&partnerID=8YFLogxK

U2 - 10.1016/j.micromeso.2016.01.043

DO - 10.1016/j.micromeso.2016.01.043

M3 - Article

VL - 225

SP - 504

EP - 514

JO - Microporous and Mesoporous Materials

JF - Microporous and Mesoporous Materials

SN - 1387-1811

ER -