Competitive adsorption of heavy metals onto sesame straw biochar in aqueous solutions

Jong Hwan Park, Yong Sik Ok, Seong Heon Kim, Ju Sik Cho, Jong Soo Heo, Ronald D. Delaune, Dong Cheol Seo

Research output: Contribution to journalArticlepeer-review

551 Citations (Scopus)


Objective of this research was to evaluate adsorption of heavy metals in mono and multimetal forms onto sesame straw biochar (SSB). Competitive sorption of metals by SSB has never been reported previously. The maximum adsorption capacities (mgg-1) of metals by SSB were in the order of Pb (102)≫Cd (86){between}Cr (65)>Cu (55){between}Zn (34) in the monometal adsorption isotherm and Pb (88){between}Cu (40){between}Cr (21)>Zn (7)≥Cd (5) in the multimetal adsorption isotherm. Based on data obtained from the distribution coefficients, Freundlich and Langmuir adsorption models, and three-dimensional simulation, multimetal adsorption behaviors differed from monometal adsorption due to competition. Especially, during multimetal adsorption, Cd was easily exchanged and substituted by other metals. Further competitive adsorption studies are necessary in order to accurately estimate the heavy metal adsorption capacity of biochar in natural environments.

Original languageEnglish
Pages (from-to)77-83
Number of pages7
Publication statusPublished - 2016 Jan
Externally publishedYes

Bibliographical note

Publisher Copyright:
© 2015 Elsevier Ltd.


  • Biochar
  • Competitive adsorption
  • Freundlich isotherm
  • Langmuir isotherm
  • Sesame straw
  • Three-dimension simulation

ASJC Scopus subject areas

  • Public Health, Environmental and Occupational Health
  • Pollution
  • General Chemistry
  • Health, Toxicology and Mutagenesis
  • Environmental Engineering
  • Environmental Chemistry


Dive into the research topics of 'Competitive adsorption of heavy metals onto sesame straw biochar in aqueous solutions'. Together they form a unique fingerprint.

Cite this