Adsorption of Direct Blue 2 Dye by Dry Biomass of Bacillus cereus from Aqueous Solution

Duaa Sameer Khazaal; Zainab Hani Hatif; Zinah Mohammed Mahdi; Sajida Frhan Hussain

doi:10.24996/ijs.2023.64.7.8

Authors

Duaa Sameer Khazaal Ministry of Science and Technology, Directorate of Water and Environment, Baghdad, Iraq
Zainab Hani Hatif Ministry of Science and Technology, Directorate of Water and Environment, Baghdad, Iraq
Zinah Mohammed Mahdi Ministry of Science and Technology, Directorate of Water and Environment, Baghdad, Iraq
Sajida Frhan Hussain Ministry of Science and Technology, Directorate of Water and Environment, Baghdad, Iraq

DOI:

https://doi.org/10.24996/ijs.2023.64.7.8

Keywords:

Adsorption, Direct Blue 2, Bacillus cereus

Abstract

One of the significant environmental problems is the pollution of water by dyes;. Biological treatment method was used, which is one of the effective ways to reduce this sort of pollution as it is environment friendly, economic and does not require any expertise. Under controlled conditions, this study estimated the efficacy of dry biomass for Bacillus cereus to reduce Direct Blue 2 dye from the aqueous solution. The optimum conditions such as pH values, contact time and concentration of dyes, were used in this research. The end results showed that the adsorption efficiency, when using a weight of bacterial biomass 0.2 g/50mL, reached 69.2% at a concentration of 10 ppm after one hour at 40°C and pH5. While it reached 54.6% for a concentration of 15 ppm with a contact time of three hours and pH 7. At 40^oC and one hour contact time, the adsorption efficiency for a concentration 20 ppm was 46.5% at pH9. The optimum conditions for the highest adsorption efficiency were achieved after one hour and pH5.