Biosorption and removal of Cr(VI)–Cr(III) from water by eco-friendly gelatin biosorbent

• Gelatin was implemented as an eco-friendly and efficient biosorbent.
• Biosorptive removal of Cr(III)–Cr(VI) from water samples.
• Various experimental parameters were optimized.
• Sorption mechanisms were evaluated by various isotherms.
• Multi-stage micro-column removal of Cr(III)–Cr(VI) from real water samples.

Gelatin as a biodegradable, biocompatible, non-toxic, non-carcinogenetic, non-immunogenic, inexpensive natural polymeric derivatives of proteins and peptides was implemented as an eco-friendly and efficient biosorbent for removal of Cr(III)–Cr(VI). A deeper understanding of the behavior and validity of gelatin as a biosorbent for interaction with Cr(III)–Cr(VI) was established. The efficient sorption properties of gelatin for Cr(III)–Cr(VI) was confirmed by metal capacity determination. Biosorption equilibria and mechanisms were examined and evaluated by using various isotherm models. The potential applications of gelatin for biosorption and removal of Cr(III)–Cr(VI) from real water samples were successfully accomplished (∼97.5–102.0 ± 2.5–4.0%).

Gelatin as a biodegradable, biocompatible, non-toxic, non-carcinogenetic, non-immunogenic, inexpensive natural polymeric derivatives of proteins and peptides was implemented in this work as an eco-friendly and efficient biosorbent for removal of Cr(III)–Cr(VI) from real water samples.Figure optionsDownload as PowerPoint slide