Determination of the Optimal Adsorbent for Bromophenol Blue Dye: Adsorption from Aqueous Solution

Document Type : Original Article


1 Department of Pharmaceutical Chemistry, College of Pharmacy, University of Anbar, Ramadi, IRAQ

2 College of Pharmacy, University Of Anbar, Anbar, Iraq

3 General Directorate of Education in Anbar/ Gifted Guardianship Committee, Ministry of Education in Iraq Anbar-Iraq


ABSTRACT: The adsorption behavior of bromophenol blue has been studied on different adsorbents for the purpose of determining the best remover for this dye. The adsorbents were activated carbon (AC), K10 montmorillonite (MMT), acidic sawdust (ASD) and basic sawdust (BSD). The influence of various experimental parameters including time of reaction, concentration and pH of solution on the adsorption of (BPB) on the four adsorbents was investigated. It was found through this study that the best adsorbent for this dye is activated carbon, and since this dye is anionic, the pH has a direct effect on its adsorption process on different surfaces. The dye prefers a positively charged surface, therefore working at low pH is the favored choice. The tendency of the surface to gain negative charge increases as the pH of the solution rises resulting in a decrease in dye adsorption due to a decrease in the electrostatic force present on the adsorbent's surface. The amounts of dye adsorbed were calculated by using UV-Vis spectroscopy.


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Volume 65, Issue 131 - Serial Number 13
Special Issue: Chemistry and Global Challenges (Part A)
December 2022
Pages 645-651
  • Receive Date: 20 March 2022
  • Revise Date: 13 April 2022
  • Accept Date: 17 May 2022