Evaluating the Biosorption Properties of Three Bacillus Strains for Cu2+ Uptake From Wastewater

Farmanbordar, Zeinab; Ghazban, Fereydoun; Mahmoodzadeh Hosseini, Hamideh; Amani, Mohammad Ali; Imani Fooladi, Abbas Ali

doi:10.30491/jabr.2020.209419.1140

Evaluating the Biosorption Properties of Three Bacillus Strains for Cu2+ Uptake From Wastewater

Document Type : Original Article

Authors

Zeinab Farmanbordar ¹

Fereydoun Ghazban ¹

Hamideh Mahmoodzadeh Hosseini ²

Mohammad Ali Amani ³

Abbas Ali Imani Fooladi ²

¹ Graduate Faculty of Environment, University of Tehran, Tehran, Iran

² Applied Microbiology Research Center, Systems Biology and Poisonings Institute, Baqiyatallah University of Medical Sciences, Tehran, Iran

³ Applied Biotechnology Research Center, Baqiyatallah University of Medical Sciences, Tehran, Iran

10.30491/jabr.2020.209419.1140

Abstract

Introduction: Toxic metal ion contamination is one of the most important environmental issues in the world. Wastewater of mines and certain industries are known sources of environmental heavy metal contaminations. Also, Copper (Cu) contamination is a common issue. Using biological tools particularly bacterial-derived compounds could be appropriate for bioremediation.
Materials and Methods: In this study, the Cu²⁺ uptake from Chah Musa mine wastewater by three different Bacillus species was assessed using the batch equilibrium isotherm. The impact of pH, exposure time, temperature, and the bioabsorbent dose on the adsorption of Cu²⁺ ions was assessed. Also, the kinetics and isotherm models of Cu²⁺ ions adsorption were studied for three different Bacillus species.
Results: The results showed that the maximum removal Cu²⁺ ions (99%) was obtained for Bacillus thuringiensis biomas. The correlation coefficient value (R²) of Freundlich isotherm was higher than Langmuir isotherm indicating better metal uptake based on the Freundlich model. The rates of adsorption for all bioadsorbant were attained to be conforming to the pseudo-second-order.
Conclusions: According to the current study, all three dead Gram-positive Bacillus spp. are favorable and effective candidates for the removal of Cu²⁺ from aqueous solutions and industrial wastewaters.

Keywords

Biosorption, Microbial Dead Cells

Mine Wastewater

Copper Ion

Bacillus