This study compared the ability of Lactobacillus bulgaricus to
remove lead from single and mixed metal ion solution. The influence
of pH was studied. The adsorption capacity of lead onto Lactobacillus
obtained at pH 5.5 was 43.5 mg g−1. The adsorption processes of lead
by studied microorganism were evaluated and analyzed using the
theories of Langmuir and Freundlich. The maximum metal uptake
values were (qmax = 123 mg/g). Biosorption of lead metal ions by
Lactobacillus is a promising technology that involves removal of toxic
metals from industrial waste streams and natural waters.