Interfacial integration of zirconium components with amino-modified lignin for selective and efficient phosphate capture
| Autor: | Zuoyi Xiao, Shangru Zhai, Qingda An, Yumeng Zhao, Xiangcheng Shan |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Zirconium
General Chemical Engineering chemistry.chemical_element Sorption 02 engineering and technology General Chemistry 010402 general chemistry 021001 nanoscience & nanotechnology Phosphate 01 natural sciences Endothermic process Industrial and Manufacturing Engineering 0104 chemical sciences chemistry.chemical_compound Adsorption chemistry Chemical engineering Selective adsorption Environmental Chemistry Thermal stability 0210 nano-technology Selectivity |
| Zdroj: | Chemical Engineering Journal. 398:125561 |
| ISSN: | 1385-8947 |
| Popis: | Water pollution is becoming increasingly serious, and one of the main culprits is the excessive phosphate in aquatic systems. Herein, a flexibly prepared, environment-friendly sustainable and highly efficient bio-sorbent (AL-DETA@Zr) for phosphate capture was developed by diethylenetriamine-modified lignin integrated with zirconium hydroxide. The related properties and functional group changes of AL-DETA@Zr were investigated by multiple characterizations such as XRD, SEM, TGA, FTIR and XPS. According to a batch adsorption experiments, AL-DETA@Zr showed excellent thermal stability, fast adsorption rate for phosphate, and maximum sorption capacity of 167.7 mg/g. It was shown from the temperature experiments that the sorption process of phosphate over AL-DETA@Zr is endothermic and spontaneous. More importantly, it exhibited outstanding selective adsorption toward phosphate and anti-interference capability for co-existing anions. After three consecutive cycles, the sorption performance of AL-DETA@Zr did not decrease significantly, demonstrative of its excellent reusability under testing conditions. The mechanism of phosphate capture onto AL-DETA@Zr could be mainly ascribed to electrostatic attraction and ligand exchange. Accordingly, as-prepared AL-DETA@Zr would be a promising choice to remedy the excess phosphate in wastewater, due to its environment-friendly, high efficiency, excellent phosphate selectivity and mechanical stability. |
| Databáze: | OpenAIRE |
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