| Autor: |
Azile Nqombolo, Tshimangadzo S. Munonde, Thollwana A. Makhetha, Richard M. Moutloali, Philiswa N. Nomngongo |
| Jazyk: |
angličtina |
| Rok vydání: |
2021 |
| Předmět: |
|
| Zdroj: |
Journal of Materials Research and Technology, Vol 12, Iss , Pp 1845-1855 (2021) |
| Druh dokumentu: |
article |
| ISSN: |
2238-7854 |
| DOI: |
10.1016/j.jmrt.2021.03.113 |
| Popis: |
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. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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