Applicability and toxicity evaluation of an adsorbent based on jujube for the removal of toxic heavy metals
- Authors
- An, B.; Lee, C.-G.; Song, M.-K.; Ryu, J.-C.; Lee, S.; Park, S.-J.; Zhao, D.; Kim, S.-B.; Park, C.; Lee, S.-H.; Hong, S.W.; Choi, J.-W.
- Issue Date
- 2015
- Publisher
- Elsevier
- Keywords
- Adsorption; Eco-friendly; Jujube; Toxic heavy metals; Toxicity evaluation
- Citation
- Reactive and Functional Polymers, v.93, pp.138 - 147
- Indexed
- SCIE
SCOPUS
- Journal Title
- Reactive and Functional Polymers
- Volume
- 93
- Start Page
- 138
- End Page
- 147
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/95974
- DOI
- 10.1016/j.reactfunctpolym.2015.06.009
- ISSN
- 1381-5148
- 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. © 2015 Elsevier B.V.
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