Removal of V(V) From Solution Using a Silica-Supported Primary Amine Resin: Batch Studies, Experimental Analysis, and Mathematical Modeling
Autor: | Xujie Chen, Yuezhou Wei, Caocong Liu, Lifeng Chen, Xi Huang, Zhenxiong Ye, Yuan Yin, Xinpeng Wang |
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Jazyk: | angličtina |
Rok vydání: | 2020 |
Předmět: |
pentavalent vanadium
Kinetics Pharmaceutical Science 02 engineering and technology 010501 environmental sciences Thermal diffusivity 01 natural sciences Article Water Purification Analytical Chemistry lcsh:QD241-441 Adsorption lcsh:Organic chemistry Drug Discovery Amines Physical and Theoretical Chemistry 0105 earth and related environmental sciences Primary (chemistry) Chemistry removal Organic Chemistry mathematical modeling Vanadium silica-supported resin Silicon Dioxide 021001 nanoscience & nanotechnology Wastewater Polymerization Chemistry (miscellaneous) Molecular Medicine Amine gas treating 0210 nano-technology Selectivity Water Pollutants Chemical Nuclear chemistry |
Zdroj: | Molecules Volume 25 Issue 6 Molecules, Vol 25, Iss 6, p 1448 (2020) |
ISSN: | 1420-3049 |
DOI: | 10.3390/molecules25061448 |
Popis: | Every year, a large quantity of vanadium-containing wastewater is discharged from industrial factories, resulting in severe environmental problems. In particular, V(V) is recognized as a potentially hazardous contaminant due to its high mobility and toxicity, and it has received considerable attention. In this study, a silica-supported primary amine resin (SiPAR) was prepared by in-situ polymerization, and the V(V) adsorption from the solution was examined. The as-prepared resin exhibited fast adsorption kinetics, and it could attain an equilibrium within 90 min for the V(V) solution concentration of 100 mg/L at an optimum pH of 4, whereas the commercial D302 resin required a treatment time of more than 3 h under the same conditions. Furthermore, the maximum adsorption capacity of the resin under optimum conditions for V(V) was calculated to be 70.57 mg/g. In addition, the kinetics and isotherm data were satisfactorily elucidated with the pseudo-second-order kinetics and Redlich&ndash Peterson models, respectively. The silica-based resin exhibited an excellent selectivity for V(V), and the removal efficiency exceeded 97% in the presence of competitive anions at 100 mmol/L concentrations. The film mass-transfer coefficient (kf) and V(V) pore diffusivity (Dp) onto the resins were estimated by mathematical modeling. In summary, this study provided a potential adsorbent for the efficient removal of V(V) from wastewater. |
Databáze: | OpenAIRE |
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