Removal of soluble microbial products and dyes using heavy metal wastes decorated on eggshell

Lin TY 1 , Chai WS 2 , Chen SJ 3 , Shih JY 1 , Koyande AK 2 , Liu BL 4 Show all authors , Chang YK 5

Affiliations 

  • 1 Department of Chemical Engineering, Graduate School of Biochemical Engineering, Ming Chi University of Technology, New Taipei City, 243303, Taiwan
  • 2 Department of Chemical Engineering and Environmental Engineering, Faculty of Science and Engineering, University of Nottingham Malaysia Campus, Selangor Darul Ehsan, 43500, Malaysia
  • 3 Department of Chemical Engineering and Materials Engineering, National Kaohsiung University of Science and Technology, Kaohsiung City, 80778, Taiwan
  • 4 Department of Applied Chemistry, Chaoyang University of Technology, Taichung, 413310, Taiwan. Electronic address: binglan@cyut.edu.tw
  • 5 Department of Chemical Engineering, Graduate School of Biochemical Engineering, Ming Chi University of Technology, New Taipei City, 243303, Taiwan. Electronic address: ykchang@mail.mcut.edu.tw
Chemosphere, 2021 May;270:128615.
PMID: 33077189 DOI: 10.1016/j.chemosphere.2020.128615

Abstract

This work studied the potential of using eggshell (ES) (200-300 μm) waste as adsorbent for sequential removal of heavy metals, soluble microbial products, and dye wastes. In this study, among soluble microbial products, chicken egg white (CEW) proteins were selected as simulated contaminants. ES was applied to capture heavy metal ions (e.g., Cu2+ and Zn2+) and the formed eggshell metal (ES-M) complex was use to absorb soluble microbial products (e.g., soluble proteins), followed by subsequent removal of dyes from aqueous solutions using ES-M-CEW adsorbent. The experimental conditions for the adsorption of CEW proteins by ES-M include shaking rate, adsorption pH, isothermal and kinetic studies. The maximum protein adsorption by ES-Zn and ES-Cu were 175.67 and 153.65 mg/g, respectively. Optimal removal efficiencies of the ES-M-CEW particles for Acid Orange (AO7) and Toluidine blue (TBO) dyes were at pH 2 and 12, respectively, achieving performance of 75.38 and 114.18 mg/g, respectively. The removal of TBO dye by ES-M-CEW adsorbent was equilibrated at 5 min. The results showed that low cost and simple preparation of the modified ES particles are feasible for treating various wastewaters.

* Title and MeSH Headings from MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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