MIL-53(FE) / COW BONE CHAR COMPOSITE FOR CHROMIUM REMOVAL FROM TANNERY WASTEWATER

  • O.A. Ajayi
  • S. Nanbyen
  • A.A. Oladipo
  • F.U. Nwafulugo

Abstract

MIL-53(Fe)/Cow bone char composite, prepared via the sol-gel method was used for the removal of chromium from real tannery effluent having an initial concentration of 40mg/l. The characteristics of MIL-53(Fe)/Cow bone char were studied using X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), thermo gravimetric analysis (TGA) Boehm titration and scanning electron microscopy (SEM-EDX). Adsorption capacity of MIL-53(Fe)/Cow bone char composite for chromium was 19.61 mg/g with a removal efficiency of 87.8% at an optimal bed height of 2.4cm (2.0g) for MIL-53(Fe)/Cow bone char composite, time of 2 minutes and pHpzc=5.4.The kinetic studies showed that the adsorption data were well fitted to the pseudo second-order model with high correlation coefficient R2=0.9911. Furthermore, the adsorption isotherm equilibrium studies confirmed that the Langmuir model best described the adsorption process of chromium onto MIL-53(Fe)/Cow bone char composite. Analysis of data with Dubinin–Radushkevich and Temkin isotherms showed that adsorption of chromium onto MIL-53(Fe)/Cow bone char composite is physical in nature.

Author Biographies

O.A. Ajayi

Department of Chemical Engineering, Ahmadu Bello University, Zaria. Kaduna State.

 

S. Nanbyen

Department of Chemical Engineering, Ahmadu Bello University, Zaria. Kaduna State.

 

A.A. Oladipo

Department of Environmental Engineering, Cyprus Science University, Girne, TRCN Mercin 10, Turkey.

 

F.U. Nwafulugo

Federal Polytechnic, Oko, Anambra State, Nigeria

Published
2021-08-25