Removal of protein wastes by cylinder-shaped NaY zeolite adsorbents decorated with heavy metal wastes

Cheng TH 1 , Sankaran R 2 , Show PL 2 , Ooi CW 3 , Liu BL 4 , Chai WS 2 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, University of Nottingham Malaysia Campus, Selangor Darul Ehsan, Malaysia
  • 3 Chemical Engineering Discipline, School of Engineering, School of Engineering, Monash University Malaysia, Jalan Lagoon Selatan, 47500 Bandar Sunway, Selangor, Malaysia
  • 4 Department of Applied Chemistry, Chaoyang University of Technology, Taichung 413310, Taiwan
  • 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
Int J Biol Macromol, 2021 Aug 31;185:761-772.
PMID: 34216668 DOI: 10.1016/j.ijbiomac.2021.06.177

Abstract

Cylinder-shaped NaY zeolite was used as an adsorbent for eradicating both heavy metal ions (Cu2+, Zn2+, Ni2+, and Co2+) and proteins from the waste streams. As a pseudo-metal ion affinity adsorbent, NaY zeolite was used in the capture of heavy metal ions in the first stage. The amount (molar basis) of metal ions adsorbed onto NaY zeolite decreased in the order of Cu2+ > Zn2+ > Co2+ > Ni2+. Bovine serum albumin (BSA) was utilized as a model of proteins used in the waste adsorption process by NaY zeolite. The adsorption capacities of NaY zeolite and Cu/NaY zeolite for BSA were 14.90 mg BSA/g zeolite and 84.61 mg BSA/g zeolite, respectively. Moreover, Cu/NaY zeolite was highly stable in the solutions made of 2 M NaCl, 500 mM imidazole or 125 mM EDTA solutions. These conditions indicated that the minimal probability of secondary contamination caused by metal ions and soluble proteins in the waste stream. This study demonstrates the potential of Cu/NaY zeolite complex as an efficient pseudo-metal chelate adsorbent that could remove metal ions and water-soluble proteins from wastewater concurrently.

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

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