Simultaneous bioremediation of cationic copper ions and anionic methyl orange azo dye by brown marine alga Fucus vesiculosus.

Affiliation

El-Naggar NE(1), Hamouda RA(2)(3), Saddiq AA(4), Alkinani MH(5).
Author information:
(1)Department of Bioprocess Development, Genetic Engineering and Biotechnology Research Institute, City of Scientific Research and Technological Applications
(SRTA-City), New Borg El-Arab City, 21934, Alexandria, Egypt. [Email]
(2)Department of Biology, College of Sciences and Arts Khulais, University of Jeddah, Jeddah, Saudi Arabia.
(3)Microbial Biotechnology Department, Genetic Engineering and Biotechnology, Research Institute, University of Sadat City, El Sadat City, Egypt.
(4)Department of Biology, College of Sciences, University of Jeddah, Jeddah, Saudi Arabia.
(5)Department of Computer Science and Artificial Intelligence College of Computer Science and Engineering, University of Jeddah, Jeddah, Saudi Arabia.

Abstract

Textile wastewater contains large quantities of azo dyes mixed with various contaminants especially heavy metal ions. The discharge of effluents containing methyl orange (MO) dye and Cu2+ ions into water is harmful because they have severe toxic effects to humans and the aquatic ecosystem. The dried algal biomass was used as a sustainable, cost-effective and eco-friendly for the treatment of the textile wastewater. Box-Behnken design (BBD) was used to identify the most significant factors for achieving maximum biosorption of Cu2+ and MO from aqueous solutions using marine alga Fucus vesiculosus biomass. The experimental results indicated that 3 g/L of F. vesiculosus biomass was capable of removing 92.76% of copper and 50.27% of MO simultaneously from aqueous solution using MO (60 mg/L), copper (200 mg/L) at pH 7 within 60 min with agitation at 200 rpm. The dry biomass was also investigated using SEM, EDS, and FTIR before and after MO and copper biosorption. FTIR, EDS and SEM analyses revealed obvious changes in the characteristics of the algal biomass as a result of the biosorption process. The dry biomass of F. vesiculosus can eliminate MO and copper ions from aquatic effluents in a feasible and efficient method.