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

Tai Hong Cheng, Revathy Sankaran, Pau Loke Show, Chien Wei Ooi, Bing Lan Liu, Wai Siong Chai, Yu Kaung Chang

Research output: Journal PublicationArticlepeer-review

23 Citations (Scopus)

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.

Original languageEnglish
Pages (from-to)761-772
Number of pages12
JournalInternational Journal of Biological Macromolecules
Volume185
DOIs
Publication statusPublished - 31 Aug 2021
Externally publishedYes

Keywords

  • Adsorption
  • Bovine serum albumin
  • Cylinder-shaped NaY zeolite
  • Heavy metal

ASJC Scopus subject areas

  • Structural Biology
  • Biochemistry
  • Molecular Biology
  • Economics and Econometrics
  • General Energy

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