| Autor: |
Han, Rui, Wang, Shengtao, Xu, Yilin, Wang, Zhenxing, Yu, Haoquan, Yang, Fan |
| Zdroj: |
Desalination & Water Treatment; February 2023, Vol. 284 Issue: 1 p175-181, 7p |
| Abstrakt: |
The wastewater containing both PO43–and Ni2+(e.g., nickel plating) causes a strong threat on the environment and human health. In this study, novel jarosite was prepared by using the chemical oxidation method as natural adsorbent and was employed for simultaneous PO43–and Ni2+removal in aqueous solution. The results revealed that as-synthesized jarosite had sea urchin-like morphology with the 2–4 nm needle burr structure and developed SBET(215.6 m2/g) and pore structure. The adsorption capacity of Ni2+on jarosite increases significantly as the concentration of PO43–increases, and when the concentration of phosphoric acid increases, the maximum adsorption capacity of Ni2+on jarosite (0.22 mmol/g) under 4.0 mM PO43–is approximately 1.6 times than that of pure Ni2+solution (0.14 mmol/g), indicating that the presence of PO43–reduces the electrostatic repulsion between jarosite and Ni2+. pH can significantly affect the adsorption of PO43–and Ni2+on jarosite by electrostatic interaction. The proposed adsorption mechanism for PO43–and Ni2+includes porous entrapment, ion exchange, electrostatic attraction and surface mineral precipitation/complexation. |
| Databáze: |
Supplemental Index |
| Externí odkaz: |
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