Optimization Of Hexavalent Chromium Ion Removal From Electroplating Wastewater Onto CMAC Using Factorial Experimental Design Analysis

IJEP 41(10): 1112-1119 : Vol. 41 Issue. 10 (October 2021)

M. Manjuladevi1, S. Kalaiselvan2*, J. Krishnaveni3 and S. Manonmani4

1. SNS College of Technology, Department of Chemistry, Coimbatore – 641 035, Tamil Nadu, India
2. M. Kumarasamy College of Engineering, Department of Chemistry, Karur – 639 113, Tamil Nadu, India
3. Suguna College of Engineering, Department of Chemistry, Coimbatore – 641 014, Tamil Nadu, India
4. PSG Arts and Science College, Department of Chemistry, Coimbatore – 641 014, Tamil Nadu, India


Factorial experimental design technique (FED) was used to investigate the adsorption of hexavalent chromium ion [Cr(VI)] from wastewater onto Cucumis melo peel activated carbon (CMAC). The structural and morphological features of activated carbon are characterized by FTIR and SEM studies. Physico-chemical characteristics and adsorption efficiency of CMAC of the wastewater are also being determined. Batch experiments are carried out for the adsorption of metal ion onto CMAC by the parameters, such as pH (3-9), adsorbent dosage (50-250 mg), concentration of metal ions (100-400 mg/L) of the adsorption capacity. The factorial design (23) is used for the interactions between three process parameters for the adsorption of metal ion is evaluated. The results of adsorption are subjected to statistical analysis by using the t-test, ANOVA, F-test which confirms the fitness of adsorption. To optimize and to know the maximum efficiency, the experimental data are used to obtain the normal probability plots, main effect; interaction plots, Pareto charts and contour plots by using design of experiment software with revelation of the best fitness. The results revealed that CMAC as a potential adsorbent for the adsorption of heavy metal ion [Cr(VI)].


Cucumis melo peel activated carbon, adsorption capacity, Factorial design


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