Journal
JOURNAL OF COLLOID AND INTERFACE SCIENCE
Volume 534, Issue -, Pages 172-182Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcis.2018.09.023
Keywords
Silver nanoparticle; Poly-dopamine; Magnetic active carbon; Orange peel; Antimicrobial adhesion; Uranium (VI) recovery
Categories
Funding
- National Natural Science Foundation of China [NSFC 51872057]
- Application Technology Research and Development Plan of Heilongjiang Province [GX16A009]
- Fundamental Research Funds of the Central University
- Natural Science Foundation of Heilongjiang Province [QC2018010]
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Undesirable bio-adhesion of microalgae on adsorbent can influence its adsorption capacity. In this report, we fabricated a novel mussel-inspired antifouling magnetic activated carbons which derived orange peel by integrated biosorption-pyrolysis process (MACs@PDA-Ag), via co-functionalization of poly-dopamine (PDA) and Ag nanoparticles (AgNPs), for the recovery of uranium (VI) from simulated seawater with antimicrobial adhesion performance; this process did not require an additional reducing agent. The effect of pH, concentration, contact time, fouling test against nitzschia closterium f.minutissima (GY-H8) were studied. Compared with MACs (632.91 mg/g at pH 7.0), the calculated maximum adsorption capacity of MACs@PDA-Ag increased to 657.89 mg/g at pH 8.0 and showed good recyclability. These data all fitted well with the Langmuir and pseudo-second order models. The possible removal mechanism by XPS is chelation (catechol hydroxyls, amine/imine units, the metal-oxygen and carboxylic) with uranium (VI). The antifouling tests indicated that the AgNPs-modified materials displayed the antimicrobial adhesion behavior, and the viability of the microorganism was not impacted. Thereby, the direct deposition of AgNPs onto the adsorbent has shown great potential for uranium (VI) recovery with an antifouling benefit and is environmentally friendly. (C) 2018 Published by Elsevier Inc.
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