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- Title
Synthesis and adsorption characteristics of calix[6]arene derivative modified <italic>Aspergillus niger</italic>-Fe<sub>3</sub>O<sub>4</sub> bio-nanocomposite for U(VI).
- Authors
Li, Le; Tang, Shuangyang; Cheng, Bin; Liao, Qi; Lu, Wei; Dai, Zhongran; Tan, Yan; Sun, Jing
- Abstract
A new type of magnetic bioadsorbent (CDAB) was synthesized by reaction of amidoxime modified calix[6]arene derivative with the <italic>Aspergillus niger</italic>-Fe3O4 bio-nanocomposite, the bioadsorbent have been well characterized with FT-IR, SEM-EDS, XPS and VSM. The effects of various experimental parameters include pH, contact time, initial uranium(VI) concentration, adsorbent dosage and temperature on the bioadsorption of uranium(VI) were investigated in detail. Adsorption experimental results showed the adsorption process of CDAB was pseudo-second order kinetic model and Langmuir adsorption isotherm model. The maximum adsorption capacities of CDAB were calculated to be 77.04 mg g−1 for uranium(VI). The adsorption efficiency of CDAB towards U(VI) could reach at 83.6% with a considerable selectivity. In addition, the thermodynamic parameters indicated that the adsorption process was spontaneous and endothermic.
- Subjects
CALIXARENE derivatives; CALIXARENES synthesis; ASPERGILLUS niger; URANIUM absorption &; adsorption; IRON oxides; LANGMUIR isotherms
- Publication
Journal of Radioanalytical & Nuclear Chemistry, 2018, Vol 316, Issue 1, p331
- ISSN
0236-5731
- Publication type
Article
- DOI
10.1007/s10967-018-5736-1