| Autor: |
DENG Kaifeng, YANG Xibin, HUANG Xiaofeng, YANG Fan, LONG Yuxin, TANG Yinxiang, WANG Yu |
| Předmět: |
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| Zdroj: |
Environmental Science & Technology (10036504); 2024, Vol. 47 Issue 6, p18-26, 9p |
| Abstrakt: |
In attempting to study As and Mn release from the wastewater of a tin-tailing pond in Gejiu City of Yunnan Province on the condition that the tin tailing have undergone rainfall leaching and long-term soaking, a static immersion and dynamic leaching experiment was conducted focusing on the changes of tailing mineral and micro-morphology. Consequently, the experiment revealed that rainfall leaching and long-term soaking would cause the significant release of As and Mn, and with a decrease of the solid-liquid ratio, the concentrations of As and Mn in the soaking solution tended to decline; a high solid-liquid ratio would extend the release cycle of As, but to Mn that was on the contrary. Since the constituent of alkaline minerals was rather high, the capacity of acid-neutrization appeared strong, the effect of initial pH value of simulated rainfall leaching water or soaking water on the release of As and Mn was small. In regard to the model fitting of heavy-metal release, it was showed that the release of As in tin tailing fit the second-order kinetic equation, while Mn release fit the second-order kinetic equation and two-rate equation. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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