Development of zinc removal process from contaminated water using statistical approaches

Document Type : Original Article

Authors

1 Department of Chemistry, Faculty of Science, Al-Azhar University, 71524, Assiut, Egypt

2 National Institute of Oceanography and Fisheries, NIOF, Cairo, Egypt.

3 Department of Chemistry, Faculty of Science, for Girls, Al-Azhar University, Cairo, Egypt

Abstract

A serious, complex environmental and public problem is contaminated water with heavy metals in the environment is due to rapid industrialization, bioaccumulation and non-degradability. Therefore, the reuse of agricultural waste in the process of purifying water from pollutants is an attractive and promising method. Almost inexpensive materials are used to purify water, thus achieving the desired economic and environmental goal. In this study, banana peel was used enhance the removal of Zn(II). The effects of various parameters were studied such as effect of pH, time, and dose at15 ppm. The removal percentage was found to be 90 % Zn(II), The data obtained from sorption isotherms were fitted to linear form of Langmuir and freundlich isotherm models but especially well fitted for the Langmuir model. The correlation coefficient values R2 for Langmuir were (0.9951) while that for freundlich were (0.9804. The rate of adsorption follows pseudo-second-order kinetics. This work proved that banana peels could be used as an efficient adsorbent material for removal of heavy Zn(II) from aqueous solutions. A response surface methodology (RSM) based on a factorial design was performed to investigate the effects of different factors at once on the removal process of Zinc using banana peels as an effective adsorbent material. Application of RSM revealed that the combination of different factors helped the system to reach its maximum potential (Removal = 98 %) that was at pH 7, contact time (95 min.), bioadsorbent material (0.36 g) and initial metal ion concentration 5 ppm.

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Volume 65, Issue 13 - Serial Number 13
Special Issue: Chemistry and Global Challenges
December 2022
  • Receive Date: 21 April 2022
  • Revise Date: 22 April 2022
  • Accept Date: 11 May 2022
  • First Publish Date: 11 May 2022