Evaluations of the physicochemical characterizations of activated carbons

Yu Chun Chiang, Pen Chi Chiang, E. E. Chang

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

The objectives of this research were to identify the surface physicochemical characteristics of activated carbons, as well as examine the specific relationship of those properties by using a statistical analysis. Eight commercial activated carbons with different raw materials, including peat, bituminous and coconut shell, were considered. The ash content, pH value, oxygenated functional groups, true density and apparent density were measured with recommended standard methods. The adsorption isotherms of nitrogen, argon and mercury were reported by using automatic adsorption apparatus. The results indicated that non-polar vapor adsorption on activated carbon was primarily determined by the amounts of specific surface area and pore volume of activated carbon. It has been realized that surface pH value was primarily influenced by the chemical properties of activated carbon exhibited in macropores. The shapes of hysteresis loops on adsorption isotherms of nitrogen suggested that the pores were probably slit-shaped or resulted from the plate-like particles. In addition, it was demonstrated that the proportion of three kinds of pores was responsible for the shape of hysteresis loop. The loop area was related to the mesopore volume.

Original languageEnglish
Pages (from-to)1437-1463
Number of pages27
JournalJournal of Environmental Science and Health - Part A Toxic/Hazardous Substances and Environmental Engineering
Volume33
Issue number7
Publication statusPublished - Oct 1998

Fingerprint

Activated carbon
activated carbon
adsorption
Hysteresis loops
Ashes
hysteresis
Adsorption isotherms
isotherm
Nitrogen
Adsorption
Peat
Argon
nitrogen
macropore
argon
Mercury
Specific surface area
Chemical properties
Functional groups
functional group

Keywords

  • Activated carbon
  • Adsorption isotherms
  • Factor analysis
  • Hysteresis loop
  • Surface functional groups

ASJC Scopus subject areas

  • Environmental Engineering
  • Environmental Science(all)
  • Environmental Chemistry

Cite this

Evaluations of the physicochemical characterizations of activated carbons. / Chiang, Yu Chun; Chiang, Pen Chi; Chang, E. E.

In: Journal of Environmental Science and Health - Part A Toxic/Hazardous Substances and Environmental Engineering, Vol. 33, No. 7, 10.1998, p. 1437-1463.

Research output: Contribution to journalArticle

@article{5cb28c62f3cd4f57a44aa38d2edc3786,
title = "Evaluations of the physicochemical characterizations of activated carbons",
abstract = "The objectives of this research were to identify the surface physicochemical characteristics of activated carbons, as well as examine the specific relationship of those properties by using a statistical analysis. Eight commercial activated carbons with different raw materials, including peat, bituminous and coconut shell, were considered. The ash content, pH value, oxygenated functional groups, true density and apparent density were measured with recommended standard methods. The adsorption isotherms of nitrogen, argon and mercury were reported by using automatic adsorption apparatus. The results indicated that non-polar vapor adsorption on activated carbon was primarily determined by the amounts of specific surface area and pore volume of activated carbon. It has been realized that surface pH value was primarily influenced by the chemical properties of activated carbon exhibited in macropores. The shapes of hysteresis loops on adsorption isotherms of nitrogen suggested that the pores were probably slit-shaped or resulted from the plate-like particles. In addition, it was demonstrated that the proportion of three kinds of pores was responsible for the shape of hysteresis loop. The loop area was related to the mesopore volume.",
keywords = "Activated carbon, Adsorption isotherms, Factor analysis, Hysteresis loop, Surface functional groups",
author = "Chiang, {Yu Chun} and Chiang, {Pen Chi} and Chang, {E. E.}",
year = "1998",
month = "10",
language = "English",
volume = "33",
pages = "1437--1463",
journal = "Journal of Environmental Science and Health - Part A Toxic/Hazardous Substances and Environmental Engineering",
issn = "1093-4529",
publisher = "Taylor and Francis Ltd.",
number = "7",

}

TY - JOUR

T1 - Evaluations of the physicochemical characterizations of activated carbons

AU - Chiang, Yu Chun

AU - Chiang, Pen Chi

AU - Chang, E. E.

PY - 1998/10

Y1 - 1998/10

N2 - The objectives of this research were to identify the surface physicochemical characteristics of activated carbons, as well as examine the specific relationship of those properties by using a statistical analysis. Eight commercial activated carbons with different raw materials, including peat, bituminous and coconut shell, were considered. The ash content, pH value, oxygenated functional groups, true density and apparent density were measured with recommended standard methods. The adsorption isotherms of nitrogen, argon and mercury were reported by using automatic adsorption apparatus. The results indicated that non-polar vapor adsorption on activated carbon was primarily determined by the amounts of specific surface area and pore volume of activated carbon. It has been realized that surface pH value was primarily influenced by the chemical properties of activated carbon exhibited in macropores. The shapes of hysteresis loops on adsorption isotherms of nitrogen suggested that the pores were probably slit-shaped or resulted from the plate-like particles. In addition, it was demonstrated that the proportion of three kinds of pores was responsible for the shape of hysteresis loop. The loop area was related to the mesopore volume.

AB - The objectives of this research were to identify the surface physicochemical characteristics of activated carbons, as well as examine the specific relationship of those properties by using a statistical analysis. Eight commercial activated carbons with different raw materials, including peat, bituminous and coconut shell, were considered. The ash content, pH value, oxygenated functional groups, true density and apparent density were measured with recommended standard methods. The adsorption isotherms of nitrogen, argon and mercury were reported by using automatic adsorption apparatus. The results indicated that non-polar vapor adsorption on activated carbon was primarily determined by the amounts of specific surface area and pore volume of activated carbon. It has been realized that surface pH value was primarily influenced by the chemical properties of activated carbon exhibited in macropores. The shapes of hysteresis loops on adsorption isotherms of nitrogen suggested that the pores were probably slit-shaped or resulted from the plate-like particles. In addition, it was demonstrated that the proportion of three kinds of pores was responsible for the shape of hysteresis loop. The loop area was related to the mesopore volume.

KW - Activated carbon

KW - Adsorption isotherms

KW - Factor analysis

KW - Hysteresis loop

KW - Surface functional groups

UR - http://www.scopus.com/inward/record.url?scp=0032189002&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0032189002&partnerID=8YFLogxK

M3 - Article

AN - SCOPUS:0032189002

VL - 33

SP - 1437

EP - 1463

JO - Journal of Environmental Science and Health - Part A Toxic/Hazardous Substances and Environmental Engineering

JF - Journal of Environmental Science and Health - Part A Toxic/Hazardous Substances and Environmental Engineering

SN - 1093-4529

IS - 7

ER -