| 含单质硫的硫化砷渣水热稳定化的过程及机理 |
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| 引用本文： | 徐慧,姚理为,许秋婧,王云燕,闵小波,柯勇,罗永健,唐巾尧,彭思昂,张李敏,杜嘉丽.含单质硫的硫化砷渣水热稳定化的过程及机理[J].中国有色金属学会会刊,2022,32(3):1041-1049. |
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| 作者姓名： | 徐慧 姚理为 许秋婧 王云燕 闵小波 柯勇 罗永健 唐巾尧 彭思昂 张李敏 杜嘉丽 |
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| 摘 要： | 提出一种水热处理方法以稳定硫化砷渣.在最优条件(160℃、2 h、液固比1:1、初始pH 2)下,水热处理后As和Cd元素的浸出毒性分别由504.0和12.0 mg/L降低至1.23和0.03 mg/L.硫化砷渣的稳定化主要通过颗粒转化成块状的结构转变及As和Cd化学形态的转变来实现.此外,硫化砷渣中具有熔融和聚合特性...
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| 关 键 词： | 水热稳定化 硫化砷渣 单质硫 结构转变 |
| 收稿时间： | 29 January 2021 |
Process and mechanism of hydrothermal stabilization for arsenic sulfide sludge containing elemental sulfur |
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| Affiliation: | 1. School of Metallurgy and Environment, Central South University, Changsha 410083, China;2. Chinese National Engineering Research Center for Control & Treatment of Heavy Metal Pollution, Changsha 410083, China;3. The High School Attached To Hunan Normal University, Changsha 410006, China |
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| Abstract: | An optimized hydrothermal treatment was employed to stabilize the arsenic sulfide sludge (ASS). Under the optimal conditions (160 °C, 2 h, liquid-to-solid (L/S) ratio of 1:1, and initial pH of 2), the leaching concentrations of As and Cd decreased from 504.0 and 12.0 mg/L to 1.23 and 0.03 mg/L of the treated ASS, respectively. The results indicate that the stabilization of the ASS was achieved through structure transformation from the particles into a bulk and the speciation transformation of As and Cd. Besides, sulfur in the ASS could significantly improve the stabilization property due to its melting and polymerization. |
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| Keywords: | hydrothermal stabilization arsenic sulfide sludge elemental sulfur structure transformation |
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