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Removal of Hexavalent Chromium from Water Using a Biomaterial Synthesized from Tannins and Chrome Shaving Proteins Hydrolysate

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Abstract 

A new biomaterial called CT-PH was prepared by reacting chestnut tannin (CT) with proteins hydrolysate (PH) from wet blue chrome shavings (WBCS), for the purpose of removing hexavalent chromium Cr(VI) from water. The maximum equilibrium uptake of chromium by CT-PH was 40.16 mg/g at optimum pH = 3, contact time of 240 min, and temperature of 25 °C. The optimal CT-PH dosage was 150 mg per 50 mL of Cr(VI) solution at 50 mg/L. The equilibrium data followed the Langmuir isotherm model and pseudo-second-order kinetic model. The intraparticle diffusion model was applied to understand the mechanism of the adsorption process. Thermodynamic parameters indicated that the Cr(VI) adsorption onto CT-PH biomaterial is physical in nature, spontaneous, and exothermic at 298.15 − 353.15 K, and that there is a decrease in the randomness at the solid/solution interface during the adsorption. Furthermore, reusability experiments proved that CT-PH can be reused multiple times. On the whole, results indicate that CT-PH can be employed as an alternative to conventional adsorbents for removing Cr(VI) from contaminated water.

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Data Availability Statement

All data generated or analysed during this study are included in this published article and its supplementary information files.

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Acknowledgements

The authors would like to thank the University of Valencia (Spain) for awarding a grant to Bouchra Nechchadi (PhD. Student) within the framework of the program “Becas jóvenes investigadores 2021.”

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Correspondence to Soufiane Tahiri.

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Highlights

• Wet blue chrome shavings (WBCS) can be harnessed for preparing biomaterials.

• Chestnut tannin (CT) and dechromated protein hydrolysate (PH) from WBCS were reacted to prepare CT-PH biomaterial.

• The removal of Cr(VI) by CT-PH was studied under different conditions.

• The maximum uptake of chromium by CT-PH was 40.16 mg/g at pH 3, contact time of 240 min, and 25°C.

• CT-PH can be reused multiple times as an alternative bioadsorbent for Cr(VI) removing.

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Supplementary file1 (DOCX 29 KB)

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Nechchadi, B., Gallart-Mateu, D., Krati, M.E. et al. Removal of Hexavalent Chromium from Water Using a Biomaterial Synthesized from Tannins and Chrome Shaving Proteins Hydrolysate. Water Air Soil Pollut 233, 504 (2022). https://doi.org/10.1007/s11270-022-05977-z

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  • DOI: https://doi.org/10.1007/s11270-022-05977-z

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