Skip to content

Removal of heavy metal from industrial wastewater using modified activated coconut shell carbon

by O. S. Amuda, A. A. Giwa, I. A. Bello
Biochemical Engineering Journal ()
Get full text at journal


The present study was undertaken to develop a cost effective biosorbent and to study the biosorption process involved in the adsorption of heavy metal-contaminated industrial wastewater using the developed biosorbent. Coconut shell carbon was modified with chitosan and/or oxidizing agent (phosphoric acid) to produce composite adsorbent. The adsorption efficiency of the adsorbent was evaluated by measuring the extent of adsorption of zinc (II) in synthetic beverage industrial wastewater. Operational parameters such as pH, agitation time and adsorbent concentration, initial ion concentration and particle size were also studied. Adsorption data fitted well with the Langmuir and Freundlich models. However, Langmuir isotherm displayed a better fitting model than Freundlich isotherm because of the higher correlation coefficient that the former exhibited, thus, indicating to the applicability of monolayer coverage of the zinc (II) on the surface of adsorbent. Desorption studies were carried out with NaOH and quantitative recovery of the metal was evident. The dominant sorption mechanism is ion exchange. The use of agricultural waste (coconut shell) and aquatic waste (chitin) to produce activated carbon potentially leads to the production of a highly effective adsorbent generated from less expensive raw materials that are from renewable resources. ?? 2007 Elsevier B.V. All rights reserved.

Cite this document (BETA)

Readership Statistics

137 Readers on Mendeley
by Discipline
38% Engineering
28% Chemistry
15% Environmental Science
by Academic Status
27% Student > Ph. D. Student
23% Student > Bachelor
22% Student > Master
by Country
2% Malaysia
1% South Africa
1% Indonesia

Sign up today - FREE

Mendeley saves you time finding and organizing research. Learn more

  • All your research in one place
  • Add and import papers easily
  • Access it anywhere, anytime

Start using Mendeley in seconds!

Sign up & Download

Already have an account? Sign in