SRI Home | About |  Instructions for Authors |  Editors |  Archive | Authors Information Charge FAQ | Submit |  Peer Review
Publication Ethics

Reviewers’ Guidelines

Memberships and Standards

Manuscript Handling fees


More on membership


Journal categories

Join Our Editorial Team

Citing Reference

Google Scholar h5-index

SNIP indicator


  Sci. Res. Impact.  

  5(5): 302-313, September 2019


 View: PDF (182KB) 


 Search Authors Articles in:






Scientific Research and Impact, Vol. 5(6), pp  302-313 September 2019


(ISSN 2315-5396) 2019 Science Park Journals

Full Length Research Paper


Comparison of Langmuir and Freundlich Isotherms for Adsorption of Color and Chemical Oxygen Demand (COD) from Textile wastewater Using Activated Carbon Derived from Groundnut Shell.


Zara Kyari Kolo1, Sunday G. Yadima2 andAbimbolaYisau Sangodoyin3.


Department of Civil Engineering Technology, Ramat Polytechnic, Maiduguri, Nigeria1,Department of Civil and Water Resources Engineering, University of Maiduguri, Nigeria2, Deparment of Agricultural  and Environmental Engineering, Faculty of Technology,University of Ibadan, Ibadan, Nigeria3.




Adsorption isotherm is an invaluable curve which describes the phenomenon governing the retention or mobility of a substance from aqueous porous medium to a solid phase. The Langmuir and Freundlich adsorption isotherms were used in this study to model the equilibrium adsorption data obtained for adsorption of Color and CODfrom textile wastewater using activated carbon produced from groundnut shell. The adsorption process   was done under two conditions viz: varying contact time and varying  dosage. The Langmuir and Freundlich correlation coefficient were determined for each parameter. The equilibrium adsorption data fitted well to the two models for both Color and COD with a better fit obtained from the Langmuir model as was evidenced from the highest Rvalue of  0.9319 as compared to the Freundlich isotherm with highest value of 0.8734.


Key words: Adsorption isotherm, color, COD, Textile wastewater.






This is an open access article published under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Science Park Journals

Copyright Science Park Journals 2012 - 2019                  Terms and Condition  |  Privacy Policy  |  FAQ  |  Customer Services