Open AccessZinc based metal–organic framework for nickel adsorption in water and wastewater samples by ultrasound assisted-dispersive-micro solid phase extraction coupled to electrothermal atomic absorption spectrometry
Author(s) -
Negar Motakef Kazemi
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.i04.123
Subject(s) - solid phase extraction , dabco , adsorption , nickel , metal organic framework , chemistry , atomic absorption spectroscopy , extraction (chemistry) , metal ions in aqueous solution , zinc , analytical chemistry (journal) , octane , materials science , nuclear chemistry , metal , chromatography , organic chemistry , physics , quantum mechanics
In this research, Zn2(BDC)2(DABCO) metal–organic framework (MOF) as a solid phase was used for separation and preconcentration toxic nickel ions (Ni) from water samples by ultrasound assisted-dispersive-micro solid phase extraction coupled to electrothermal atomic absorption spectrometry (USA-D-μ-SPE/ET-AAS). The MOF nanostructure was characterized by field emission-scanning electron microscope (FE-SEM) and transmission electron microscopey (TEM) for presentation of morphology and size of MOF synthesis. By procedure, 25 mg of Zn2(BDC)2(DABCO) as MOF adsorbent was added to 25 mL of water samples and then, Ni ions chemically adsorbed based on dative bonding of nitrogen in DABCO (1,4-diazabicyclo [2.2. 2]octane); N2(C2H4)3) at pH=8. The adsorbent was separated from liquid phase by syringe cellulose acetate filters (SCAF, 0.2 μm) and Ni ions back extracted from MOF adsorbent before determined by ET-AAS. The maximum recovery of MOF for nickel ions as a physically and chemically adsorption was obtained 34.6% and 98.8% at pH=3 and 8, respectively.