Biosynthesized silica-based zinc oxide nanocomposites for the sequestration of heavy metal ions from aqueous solutions
- Title
- Biosynthesized silica-based zinc oxide nanocomposites for the sequestration of heavy metal ions from aqueous solutions
- Author
- 홍승호
- Keywords
- Heavy metal ions; Water treatment; Adsorption; Nanocomposites; Chemisorption
- Issue Date
- 2022-03
- Publisher
- Elsevier B.V.
- Citation
- In Journal of King Saud University - Science June 2022 34(4)
- Abstract
- In the present study, biosynthesized silica-based zinc oxide nanocomposites (nano-SZO) have been
explored as nanoadsorbent for sequestrating heavy metal ions viz. Ni2+, Cd2+and Cu2+ from synthetic
medium. The nanocomposites have been obtained by utilization of agricultural waste by means of green
synthetic approach with an average particle size of 30.52 nm and a pH at zero-point charge as 4.8. The
process has been optimized at a pH equal to 5.0 for Ni2+ and 6.0 for Cu2+ and Cd2+. Adsorption was best
described by Langmuir isotherm and the highest value of maximum adsorption capacity, qm of nano-SZO
was obtained for Cu2+ (32.53 mg/g), Ni2+ (32.10 mg/g), and Cd2+ (30.98 mg/g). The studied heavy metal
ions are considerably adsorbed by the nano-SZO through chemisorption by active binding with polyhy-
droxy functionalities attached at the surface of the nanoadsorbent confirming the utilization of biosyn-
thesized nano-SZO as eco-friendly and efficient nano adsorbents for the sequestration of heavy metal
ions.
- URI
- https://www.sciencedirect.com/science/article/pii/S101836472200177Xhttps://repository.hanyang.ac.kr/handle/20.500.11754/170789
- ISSN
- 1018-3647
- DOI
- 10.1016/j.jksus.2022.101996
- Appears in Collections:
- COLLEGE OF ENGINEERING SCIENCES[E](공학대학) > CIVIL AND ENVIRONMENTAL ENGINEERING(건설환경공학과) > Articles
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