Open AccessFacile synthesis of a modified HF-free MIL-101(Cr) nanoadsorbent for extraction nickel in water and wastewater samples
Author(s) -
Saeed Fakhraie,
Ali Ebrahimi
Publication year - 2020
Publication title -
analytical methods of environmental chemistry journal
Language(s) - English
Resource type - Journals
eISSN - 2645-5552
pISSN - 2645-5382
DOI - 10.24200/amecj.v3.i02.103
Subject(s) - nickel , nitric acid , sorbent , extraction (chemistry) , solid phase extraction , terephthalic acid , chemistry , elution , nuclear chemistry , certified reference materials , wastewater , chromatography , detection limit , adsorption , inorganic chemistry , organic chemistry , waste management , polyester , engineering
A novel sorbent based on MIL-101(Cr) nanoadsorbent as MOF structure was used for nickel extraction from water and wastewater samples. In this study, 30 mg of MIL-101(Cr) nanoadsorbent dispersed in 50 mL of water or wastewater samples, after sonication and adjusting pH =8.5, the nickel ions was extracted by carboxyl groups of terephthalic acid (MOF-(C6H4 (COO)-2…. Ni2+) by dispersive suspension micro solid phase extraction (DS-μ-SPE).The MOF was separated from liquid phase with filter membrane (0.2 μm), eluted with 0.5 mL of nitric acid as back-extraction solution and finally, the nickel concentration in eluent determined by atom trap-flame atomic absorption spectrometry (AT-FAAS) after dilution with DW up to 1 mL.The LOD, the linear range and preconcentration factor were achieved 1.5 µg L−1, 5-160 µg L−1 and 49.7, respectively.The absorption capacity of MOF for nickel was obtained 136.8 mg g-1.The results of procedure were validated by spiking of samples and ET-AAS analyzer.