| Autor: |
Xiaoliang Zhang, Xuanmin Song |
| Zdroj: |
Desalination & Water Treatment; Sep2019, Vol. 163, p190-197, 8p, 1 Chart, 6 Graphs |
| Abstrakt: |
Mg–Al–CO3 hydrotalcite-like compound (HTlc) was synthesized by coprecipitation method, and HTlc was calcined under 500°C to obtain calcined Mg–Al–CO3 hydrotalcite-like compound (CHTlc). The samples were examined by X-ray diffraction and Fourier transform infrared spectroscopy. Adsorption properties of chromium (VI) (Cr(VI)) and phosphorous (V) (P(V)) on CHTlc were investigated. A series of experiments were performed to study the influence of various experimental parameters, such as contact time, pH, initial concentration, and adsorbent dosage. Competitive adsorption characteristics of Cr(VI) and P(V) on CHTlc were investigated and the adsorbent regeneration experiment was carried out. Results indicate that the optimum adsorption could be achieved with 1 g L−1 adsorbent solution (20 mg L−1 Cr(VI) and 20 mg L−1 P(V)) at a pH of approximately 5 in 8 h. Cr(VI) adsorption in co-existing solution system of the two anions is obviously suppressed by P(V), while Cr(VI) had no significant influence on P(V) adsorption. The adsorbent can be regenerated within 10%Na2 CO3 + 5%NaOH solution. After three regeneration cycles, the adsorption removal rate of Cr(VI) and P(V) had not changed significantly. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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