Application of sulfur-coated magnetic carbon nanotubes for extraction of some polycyclic aromatic hydrocarbons from water resources

Wen Sun; Yaoliang Hong; Tian Li; Huaqiang Chu; Junxia Liu; Li Feng

doi:10.1016/j.chemosphere.2022.136632

Application of sulfur-coated magnetic carbon nanotubes for extraction of some polycyclic aromatic hydrocarbons from water resources

Chemosphere. 2022 Dec;309(Pt 1):136632. doi: 10.1016/j.chemosphere.2022.136632. Epub 2022 Sep 28.

Authors

Wen Sun¹, Yaoliang Hong¹, Tian Li², Huaqiang Chu², Junxia Liu³, Li Feng⁴

Affiliations

¹ School of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou, 215009, China; National & Local Joint Engineering Laboratory for Municipal Sewage Resource Utilization Technology, Suzhou University of Science and Technology, China; Jiangsu Collaborative Innovation Center of Technology and Material of Water Treatment, Suzhou University of Science and Technology, 215009, China.
² State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai, 200092, China; Key Laboratory of Yangtze River Water Environment, Ministry of Education, College of Environmental Science and Engineering, Tongji University, Shanghai, 200092, China.
³ School of Civil and Transportation Engineering, Guangdong University of Technology, Guangzhou, 510006, China.
⁴ School of Civil and Transportation Engineering, Guangdong University of Technology, Guangzhou, 510006, China. Electronic address: fl19860314@126.com.

PMID: 36181857
DOI: 10.1016/j.chemosphere.2022.136632

Abstract

In the present work, novel sulfur-coated magnetic carbon nanotubes (MCNTs-S) material was fabricated by S coating on the MCNTs using a simple heating procedure. TGA, EDX, XRD, TEM, and VSM were employed to characterize the as-prepared composite. Using HPLC-UV system, the produced superparamagnetic sorbent was employed for the extraction and measurement of trace levels of five polycyclic aromatic hydrocarbons (PAHs) in environmental waters. The synergistic effect of the sulfur layer and CNTs substrate is primarily responsible for the remarkable extraction efficiency of the MCNTs-S sorbent towards PAHs. The experimental factors including MCNTs-S dosage, sorption time, elution solvent, ionic strength and solution pH were explored and optimized. Considering that the ionic strength and pH do not have any impact on the PAHs extraction, as a result, there is no need the unnecessary adjustment of the water samples. The linear dynamic ranges and detection limits under optimal conditions were in the range of 0.05-0.11 ng mL^-1 and 0.2-150 ng mL^-1, respectively. The analysis of PAHs in the real samples (sea water and river water) using this approach was successfully assessed with appropriate recovery values (94.6%-99.0%).

Keywords: Chromatography; Environmental waters; Magnetic adsorbent; Polycyclic aromatic hydrocarbons; Solid-phase extraction.

MeSH terms

Magnetic Phenomena
Nanotubes, Carbon* / chemistry
Polycyclic Aromatic Hydrocarbons* / analysis
Solid Phase Extraction / methods
Solvents / analysis
Sulfur
Water / chemistry
Water Pollutants, Chemical* / analysis
Water Resources

Substances

Polycyclic Aromatic Hydrocarbons
Nanotubes, Carbon
Water Pollutants, Chemical
Water
Sulfur
Solvents