Evaluation of Peanut Shell, Bentonite Clay and its Composites in the Removal of Dye (Malachite Green) from Industrial Wastewater

ABSTRACT

Curtailing the effects of environmental pollution being a major problem encountered by third-world countries, this study was embarked on to reduce the effect of land and water pollution caused by improper disposal of dye used by industries by using readily available agricultural waste like peanut Shell, bentonite clay and its composite. Analysis that was used included Scanning electron microscope (SEM), Electron dispersive x-ray spectroscopy (EDX), Fourier transform infrared spectroscopy (FTIR) Some physical parameters were considered too: Absorbent load, Contact time, pH and Concentration. The results from the SEM, EDX and FTIR showed the adsorptive capacities of the absorbents, it’s functional and the compounds contained. The result of the physical parameters for adsorbent load; Peanut shell the percentage removal increase from 26.93%-28.0% .For bentonite clay increase from 7.05%-8.24%. The combination of both peanut shell and bentonite increased from 93.22%-95.40%. For the contact time the dye removal percentage increase from 99.13%-99.37% which later decreased to 98.16%.Bentonite clay decreased from 71.09%-69.53% and later increased to 70.13%. The combination decreased from 52.33%-51.29% and increased to 52.60%bbut decreased at the last lap to 50.83% At 60-80minutes optimal time was achieved due to saturation of active sites for high removal of dye efficiency. pH was observed too which varied. Peanut shell shows that the percentage removal increased from 61.89%-62.37% then decreased to 60.87%.Bentonite clay decreased from completely from 99.72%-97.58%. The combination decreased from 32.14%-31.94% then increased to 33.54%.We can say that for the peanut shell and the combination of both peanut shell and bentonite clay pH was increased slightly at the acidic side.

Keywords: Peanut shell, Bentonite clay, Malachachite green, Dye, Industrial waste

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