Magnetic Dispersive Micro-Solid Phase Extraction of Pb(II) Using Core-Shell mMWCNTs@CoNiFe-LDH Nanoflowers From Food and Water Samples

Ahmed H. E. H., Mohammed A. M. A., SOYLAK M.

WATER AIR AND SOIL POLLUTION, vol.237, no.5, 2025 (SCI-Expanded, Scopus) identifier identifier identifier

  • Publication Type: Article / Article
  • Volume: 237 Issue: 5
  • Publication Date: 2025
  • Doi Number: 10.1007/s11270-025-08940-w
  • Journal Name: WATER AIR AND SOIL POLLUTION
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, ABI/INFORM, Artic & Antarctic Regions, BIOSIS, Chemical Abstracts Core, Chimica, Compendex, EMBASE, Environment Index, Geobase, Greenfile
  • Kocaeli University Affiliated: Yes

Abstract

A new magnetic dispersive micro-solid-phase extraction method was developed for the detection of Pb(II) ions, using hierarchical nanocomposite (mMWCNTs@CoNiFe-LDH). This adsorbent synergistically combines magnetic multi-walled carbon nanotubes with flower-like CoNiFe-layered double hydroxide (LDH), providing rapid extraction within 3 min and simple magnetic separation. The extensive characterization validated its porous core-shell design, elevated surface functioning, and thermal stability. Under optimal conditions, this method demonstrated good sensitivity (LOD: 0.142 mu g L(-)1, LOQ: 0.431 mu g L(-)1), and precision (RSD <= 4.2%). The nanocomposite exhibited high reusability and selectivity in the presence of significant concentrations of interfering ions. The approach, validated with certified reference materials (90-94% recovery) and used for several matrices (water, food and tobacco), indicated worrisome Pb concentrations in curry powder (22.1 mu g kg(-)1) and tobacco (71.8 mu g kg(-)1). Evaluations of greenness confirmed environmental sustainability. This method provides a fast and dependable option for analyzing Pb(II) in food and water samples.