I.Haydari, A.Lissaneddine, K. Aziz et al. Optimization of preparation conditions of a novel low-cost natural bio-sorbent from olive pomace and column adsorption processes on the removal of phenolic compounds from olive oil mill wastewater. Environ Sci Pollut Res (2022). https://doi.org/10.1007/s11356-022-20577-4