Applicability and toxicity evaluation of an adsorbent based on jujube for the removal of toxic heavy metals

Byungryul An, Chang Gu Lee, Mi Kyung Song, Jae Chun Ryu, Soon-Jae Lee, Seong Jik Park, Dongye Zhao, Song Bae Kim, Chanhyuk Park, Sang-Hyup Lee, Seok Won Hong, Jae Woo Choi

Research output: Contribution to journalArticlepeer-review

11 Citations (Scopus)

Abstract

Abstract The removal of heavy metals from industrial wastewater is important, owing to its eco-toxicity in aqueous environment. In this study, the mechanism and efficiency of the removal of toxic heavy metals by an eco-friendly adsorbent was investigated. Various types of adsorbents made from jujube were synthesized by varying the drying temperature of gel-type beads and elution method for jujube constituents. The maximum adsorption capacity for lead and copper ions was determined using the Langmuir isotherm model, with DJB-A-S-F (freeze-dried jujube bead made from a solution of squeezed autoclaved jujube) having the highest values at 60.44 mg/g (lead) and 20.33 mg/g (copper). In addition, the characteristics of the various adsorbents were determined by the Brunauer-Emmett-Teller (BET) method, scanning electron microscopy (SEM), and energy dispersive X-ray analysis (EDX). Gas chromatography-mass spectrometry (GC-MS) was used to identify the constituents of DJB-A-S-F before and after adsorption of heavy metals (Pb- and Cu-DJB-A-S-F). Furthermore, in vitro cytotoxicity assay was performed to investigate whether the binding of heavy metals to DJB-A-S-F increases cellular toxicity. As a result, no differences in cell viability between DJB-A-S-F and the ones coupled to heavy metals were observed, indicating that the developed adsorbents are non-cytotoxic with good compatibility. Thus, DJB-A-S-F is a promising adsorbent for the removal of toxic heavy metal cations from wastewater.

Original languageEnglish
Article number3531
Pages (from-to)138-147
Number of pages10
JournalReactive and Functional Polymers
Volume93
DOIs
Publication statusPublished - 2015 Jun 25

Keywords

  • Adsorption
  • Eco-friendly
  • Jujube
  • Toxic heavy metals
  • Toxicity evaluation

ASJC Scopus subject areas

  • Materials Chemistry
  • Polymers and Plastics
  • Chemistry(all)
  • Chemical Engineering(all)
  • Environmental Chemistry
  • Biochemistry

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