Biosorption of lead, chromium and cadmium in tannery effluent using indigenous microorganisms

Abstract

This study investigated the biosorption of lead, chromium and cadmium in tannery effluent using indigenous microorganisms. Bacteria isolated from the tannery effluent were Bacillus subtilis and B. megaterium while fungi isolated were Aspergillus niger and Penicillium sp. The microorganisms were tested for their ability to reduce the concentration of the heavy metals in the tannery effluent using conventional methods. B. megaterium recorded the highest lead reduction (2.13 to 0.03 mg/L), followed by B. subtilis (2.13-0.04 mg/L). A. niger recorded the highest ability to reduce the concentration of chromium (1.38-0.08 mg/L) followed by Penicillium sp. (1.38 0.13 mg/L) while B. subtilis exhibited the highest ability to reduce the concentration of cadmium (0.4-0.03 mg/L) followed by B. megaterium (0.04-0.06 mg/L) after 20 days. When these values were compared to standard limits of Federal Environmental Protection Agency (FEPA), World Health Organization (WHO), National Environmental Standard and Regulations Enforcement Agency (NESREA) and Central Pollution Control Board (CPCB), the isolates recorded an acceptable reduction in the concentration of lead, chromium and cadmium in sterile and unsterile tannery effluent. The results of this showed that the isolates reduced the concentration of lead, chromium and cadmium present in the sterile and raw tannery effluent and suggest that the organisms can be used as a possible treatment of tannery effluents.

Reduction of Some Heavy Metals in Fibre Cement Roofing Sheet Waste-Contaminated Soil by Consortium of Bacteria and Fungi

“…The treatments with consortia of organisms reduced the metals more than other treatments which may be attributed to microorganisms living in mixed colonies comprising of different species and genera of organisms where there is synergy of different metabolic activities. Many researchers have reported the higher effectiveness of consortia of microorganisms for bioremediation of heavy metals than single organisms (Kader et al, 2007); Mosa et al, 2016;Abioye et al, 2018) which conforms with the findings of this study where the different combinations of the consortia gave a better result than single treatment procedures.…”

Toxicity and Bioremediation of Heavy Metals Contaminated Ecosystem from Tannery Wastewater: A Review

“…Abioye and his coworkers [ 123 ] investigated the biosorption of lead (Pb), chromium (Cr), and cadmium (Cd) in tannery effluent using Bacillus subtilis, B. megaterium, Aspergillus niger, and Penicillium sp. B. megaterium recorded the highest lead (Pb) reduction (2.13 to 0.03 mg/L), followed by B .…”

Biosorption of heavy metal polluted soil using bacteria and fungi isolated from soil

“…The lipopolysaccharide present in the cell wall contains phosphate and carboxyl groups and phospholides, which are the primary sites of metal ion binding, thereby making biosorption process possible by the microorganism. Abioye et al [23] found that Pseudomonas aeruginosa has been accounted for as effective chromium reducer. In comparative study, on the selective binding of different metals to the cell wall of Pseudomonas species, copper had much more affinity than other heavy metals like nickel and cadmium when evaluated together [34,35].…”

“…Biosorbents contain some atomic groups that have tendency to sorbates, for example, metal ions. This innovation utilizes different sorts of biomass to expel heavy metals from contaminated environment [19,23].…”