| Autor: |
Manninen, Mikael, Kangas, Teija, Hu, Tao, Varila, Toni, Lassi, Ulla, Runtti, Hanna |
| Předmět: |
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| Zdroj: |
Environmental Technology; May2024, Vol. 45 Issue 13, p2519-2530, 12p |
| Abstrakt: |
Removal of dissolved zinc (Zn) from water by a novel alkali-activated material (AAM) prepared from steel industry slags in a fixed-bed column was investigated. Design of experiments was used to find the optimum operation parameters [flow rate $\lpar Q\rpar$ (Q) , adsorbent mass, ($m_{{\rm ads}}$ m ads ), and initial Zn concentration ($C_0$ C 0 )] for the removal of Zn2+ from a ZnCl2 solution. Regression models for the breakthrough ($q_{\rm b}$ q b ), and saturation ($q_{{\rm sat}}$ q sat ) capacities of the bed and three other response parameters as functions of $Q$ Q , $m_{{\rm ads}}$ m ads and $C_0$ C 0 were fitted with coefficients of determination ($R^2$ R 2 ) ranging from 0.48 to 0.99. Experimental values of $q_{\rm b}$ q b and $q_{{\rm sat}}$ q sat varied within 1.42–7.03 mg Zn/g and 10.57–17.25 mg Zn/g, respectively. The optimum operation parameters were determined to be $Q =$ Q = 1.64 ml/min and $m_{{\rm ads}} =$ m ads = 4.5 g, whereas $C_0$ C 0 had negligible effect on the response parameters in the range 73–107 mg Zn/l. Finally, three empirical breakthrough curve (BTC) models were employed to describe the individual BTCs of which the modified dose – response model was found to give the best fit (0.960 $\le$ ≤ $R^2$ R 2 $\le$ ≤ 0.998). The results of the present work demonstrate that the novel AAM has considerable potential to be utilized in water purification applications. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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