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Development and application of histidine-modified silica materials for Pb (II) removal from aqueous solutions

Sanaa Saoiabi, Sanae El Asri, Abdelaziz. Laghzizil, Ahmed Saoiabi

Incorporation of histidine within silica was performed using the sol-gel process. The porosity of the materials decreases with organic content whereas its affinity for lead ions increases. The sorption kinetics and isothermswere studied, together with the variation of pHduring the sorption reaction. These results indicate that the grafting histidine on porous silica presents synergy in the ability to complex Pb (II) ions, so the grafted histidine –silica can be employed as potential agent for lead remediation.