Adsorption 6 Intra-particle diffusion Kinetics 6 article 6 priority journal 6 scanning electron microscopy 6 Adsorption kinetics 4 Biosorption 4 Cadmium 4 Copper 4 Lead 4 Metals 4 Surface Properties 4 Zinc 4 Zinc compounds 4 adsorption kinetics 4 biosorption 4 controlled study 4 isotherm 4 kinetics 4 lead 4 surface property 4 A. fatua 2 Acidic conditions 2 Adsorption capacities 2 Adsorption efficiency 2 Adsorption equilibrium isotherms 2 Adsorption isotherms 2 Adsorption process 2 Affinity constants 2