Adsorption of antibiotics and iopromide onto single-walled and multi-walled carbon nanotubes

Hyunook Kim, Yu Sik Hwang, Virender K. Sharma

Research output: Contribution to journalArticlepeer-review

133 Scopus citations

Abstract

Engineered carbon nanotubes (CNTs) have shown a great promise for many remediation applications. The adsorption of two antibiotics (lincomycine and sulfamethoxazole) and one contrast medium (iopromide) on single-walled carbon nanotubes (SWCNT) and multi-walled carbon nanotubes (MWCNT) was investigated using batch adsorption experiments. These selected pollutants have high detection frequencies in aquatic environments. The adsorption results were compared with those of conventional powdered activated carbon (PAC). Adsorption isotherms for all pollutants on CNTs and PAC were nonlinear and could be described reasonably well with the Freundlich isotherm model. The adsorption generally followed the order SWCNT. >. PAC. >. MWCNT. The relatively low adsorption on MWCNT was probably due to its lower specific surface area than other carbon materials. However, correlation of adsorption to the surface area of carbon materials suggests other factors such as properties of adsorbate and type of interaction between pharmaceuticals and CNTs may also contribute to the adsorption processes. Implications of the adsorption results for the removal of pharmaceuticals from aqueous solution using CNTs are briefly discussed.

Original languageEnglish
Pages (from-to)23-27
Number of pages5
JournalChemical Engineering Journal
Volume255
DOIs
StatePublished - 1 Nov 2014

Keywords

  • Adsorption isotherm
  • Adsorption of pharmaceuticals
  • Multi-walled carbon nanotubes
  • Powdered activated carbon
  • Removal of pharmaceuticals
  • Single-walled carbon nanotubes

Fingerprint

Dive into the research topics of 'Adsorption of antibiotics and iopromide onto single-walled and multi-walled carbon nanotubes'. Together they form a unique fingerprint.

Cite this