[1] Đozić, A. et al. 2022. Efficiency of removal Cr(III), Ni(II), Pb(II) ions from simulated wastewater using natural and modified Ca - bentonite. International Journal of Environment, Agriculture and Biotechnology. 7, 4 (2022), 054–062. DOI:https://doi.org/10.22161/ijeab.74.6.