Document Type: ORIGINAL RESEARCH PAPER

Authors

Department of Biotechnology, Kumaraguru College of Technology, Chinnavedampatti, Saravanampatty, Coimbatore, Tamilnadu 641 049, India

Abstract

The current investigation presents the role of gooseberry (Phyllanthus acidus) seeds as an effective biosorbent for remediating chromium (VI)), a toxic heavy metal pollutant commonly found in effluents from tanneries and relevant industries. Biosorption was affected by pH, temperature and initial metal concentration. Furthermore, there is a need to understand the holistic effect of all variables to ascertain the best possible conditions for adsorption, therefore, these factors were considered and a total of 17 trials were run according to the Box Behnken design. Quadratic model had maximum R2 value (0.9984) and larger F value (1109.92). From the Analysis Of Variance table and R2 value, quadratic model was predicted to be the significant model with the best fit to the generated experimental data. The optimal parameters obtained from the contour plot for the maximum removal of chromium(VI) were initial metal concentration of 60 mg/L, pH value of 2, and temperature of 27°C. Under these conditions, maximum removal of 92% was obtained. Thus this biosorbent substantially eliminates chromium(VI) under optimized conditions, enabling its use in larger scale. 

Graphical Abstract

Highlights

  • The optimal conditions for Cr(VI) biosorption using Gooseberry seed is at 27°C in pH 2 with an initial metal concentration of 60mg/L of sample
  • Based on the regression equation, the individual effect of pH, temperature and initial metal concentration have negative effect on biosorption
  • Maximum removal of Cr(VI) in this study is 91.26% of the initial concentration which has been validated 
  • Locally available alternative for Effective removal of Cr(VI)

Keywords

Main Subjects

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