Sorption of chromium(VI) from electroplating effluent onto chitin immobilized Mucor racemosus sorbent (CIMRS) impregnated in rotating disk contactor blades

• Sorption of chromium(VI) from electroplating effluent with CIMRS is investigated.
• Impregnation of CIMRS in the mesh structured packing of MRDC improved the sorption of Cr(VI) ions.
• The study completely elucidates the kinetics and thermodynamics of sorption.
• The efficiency of CIMRS impregnated in MRDC blades for reducing the Cr(VI) ion concentration in the electroplating effluent is thoroughly investigated.
• The simplicity, accuracy, efficiency and robustness of the technique adopted in MRDC, encourage its application in similar sorption and desorption studies.

The study was aimed at investigating the efficacy of chitin immobilized Mucor racemosus sorbent (CIMRS) sorbent, impregnated in the modified rotating disc contactor (MRDC) blades for the sorption of chromium(VI) contained in the electroplating effluent. The optimum time, pH, temperature and CIMRS dosage were found to be 8 h, 7.0, 323 K and 0.7 g/150 mL, respectively, for MRDC sorption studies. Desorption studies were also carried out in MRDC at 60 °C. Seven isotherms were applied to model the experimental data. The present study reveals highly promising nature of CIMRS for Cr(VI) sorption from electroplating effluent.

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