title: Functionalization of magnetic hollow porous oval shape NiFe2O4as a highly selective sorbent for the simultaneous determination of five heavy metals in real samples.
abstract: In this study, a functionalized magnetic hollow porous oval-shape NiFe2O4(MHPO-NiFe2O4) was designed by a facile synthesis procedure, and employed as magnetic solid phase extraction (MSPE) material to extract several heavy metal ions. As-prepared MHPO-NiFe2O4exhibited superior adsorption capacities of 20.17, 16.64, 16.82, 9.69 and 16.58mgg-1, for Cu(II), Cd(II), Cr(III), Co(II) and Zn(II), and was then used to detect these heavy metals elements in real samples by combining with inductively coupled plasma optical emission spectroscopy (ICP-OES). The possible mechanism of the enrichment of heavy metals ions on MHPO-NiFe2O4was proposed, which involved the dominant adsorption and desorption. The detection limits were as low as 0.015, 0.13, 0.062, 0.035 and 0.46μgL-1for Cu(II), Cd(II), Cr(III), Co(II) and Zn(II), respectively. A good repeatability was obtained with the relative standard deviation (RSD) of 3.87%. Moreover, the method was successfully utilized for the analysis of five heavy metals in real samples (cabbage, lettuce, apple, seawater), with satisfactory recoveries in the range of 92-108%.
authors: College of Chemistry, Liaoning University, Shenyang, 110036 People's Republic of China.
authors: Mingyang
authors: M
authors: Liu
authors: College of Chemistry, Liaoning University, Shenyang, 110036 People's Republic of China.
authors: Lijun
authors: L
authors: Yang
authors: College of Chemistry, Liaoning University, Shenyang, 110036 People's Republic of China. Electronic address: zhanglei63@126.com.
authors: Lei
authors: L
authors: Zhang
mesh_terms: D000327:Adsorption; D001937:Brassica; D004785:Environmental Pollutants / Q000032:analysis* / Q000737:chemistry; D005290:Ferric Compounds / Q000737:chemistry*; D005506:Food Contamination / Q000032:analysis; D005638:Fruit / Q000737:chemistry; D018545:Lactuca; D057230:Limit of Detection; D060328:Magnetic Phenomena; D027845:Malus; D019216:Metals, Heavy / Q000032:analysis* / Q000737:chemistry; D009532:Nickel / Q000737:chemistry*; D018515:Plant Leaves / Q000737:chemistry; D016062:Porosity; D012623:Seawater / Q000032:analysis; D052616:Solid Phase Extraction
chemical_list: D004785:Environmental Pollutants; D005290:Ferric Compounds; D019216:Metals, Heavy; C550717:nickel ferrite; D009532:Nickel
keywords: Functionalized magnetic hollow porous oval-shape NiFe(2)O(4); Heavy metal ion; Inductively coupled plasma optical emission spectroscopy; Solid phase extraction