Abstract
Herein, a Co/Zn based metal organic frameworks (ZIF-67/ZIF-8) adsorbent was synthesized through a facile method and used for the removal of As(V) and Cr(VI) ions. The adsorbent was characterized by Brunauer Emmett and Teller (BET), X-ray photoelectron spectroscopy (XPS), high resolution scanning electron microscopy (HR-SEM) equipped with energy dispersive spectroscopy (EDS), transmission electron scanning microscopy (TEM) and X-ray diffraction (XRD). The XPS results confirmed that a mixed metal MOF ZIF-67/ZIF-8 was formed. Several isotherm models were studied and the obtained results indicated a homogeneous monolayer adsorption described by Langmuir isotherm with maximum capacities of 69.4 and 71.4 mg g-1 for Cr(VI) and As(V) respectively. The adsorbent selectively removed both oxyanions in real water samples, i.e., a complex matrix that contained other metals and anions. The ZIF-67/ZIF-8 showed excellent adsorption properties towards the two targeted heavy metals therefore can be a great adsorbent in wastewater treatment.
Original language | English |
---|---|
Pages (from-to) | 1845-1855 |
Number of pages | 11 |
Journal | Journal of Materials Research and Technology |
Volume | 12 |
DOIs | |
Publication status | Published - 2021 |
Keywords
- Adsorptive removal
- Contaminated water
- Intraparticle diffusion
- Langmuir
- MOF
- Maximum adsorption
- Monolayer adsorption
- Toxic metals
- ZIF-67/ZIF-8
ASJC Scopus subject areas
- Ceramics and Composites
- Biomaterials
- Surfaces, Coatings and Films
- Metals and Alloys