使用盐水浸从铜植物残留物 (CPR) 中回收 - 沉 - 化工艺
Cong Li1, Suqin Li1, Penghui Guo1
1School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing, 100083, China.
Chemosphere
|October 21, 2023
概括
这项研究开发了一种新的HCl-NaCl洗-转换-热分解工艺,将危险的铜植物残留物 (CPR) 转化为有价值的氧化 (PbO) 和四氧化 (Pb3O4),实现高纯度产品并促进残留物回收.
科学领域:
- 环境科学与工程环境科学与工程
- 材料科学 材料科学 材料科学
- 化学工程是化学工程的重要组成部分.
背景情况:
- 铜植物残留物 (CPR) 是一种具有显著毒性和有价值金属含量的危险工业废物.
- 传统的废弃物处理方法,如储存和填埋,导致土地被占用和水污染.
- 对于高附加值的CPR利用来减轻环境风险和回收资源是非常需要的.
研究的目的:
- 开发和优化一种从CPR中制备氧化 (PbO) 和四氧化 (Pb3O4) 的工艺.
- 调查回收的HCl-NaCl洗-转换-热分解方法的效率.
- 将危险的CPR转化为有价值的商业产品,促进循环经济原则.
主要方法:
- 使用HCl-NaCl浸出-转换-热分解工艺,以CPR作为主要原料.
- 研究了各种浸出参数 (温度,液体-固体比,时间,度,颗粒大小) 对回收的影响.
- 采用响应表面方法来优化PbCl2转化为PbCO3前体.
主要成果:
- 在最佳条件下达到87.65%的最大出水率,出水中的含量为15.85g/L.
- 确定了灰扩散作为速度限制步骤,确定动力参数 (激活能量,反应顺序).
- 通过热分解PbCO3前体 (转化率>96.50%),获得高纯度的PbO和Pb3O4 (分别为99.65%和99.26%).
结论:
- 在HCl-NaCl的洗-转换-热分解过程中,有效地将危险的CPR转化为有价值的PbO和Pb3O4.
- 开发的方法确保有效和最大限度的回收,促进工业废物的回收利用.
- 这种方法为管理CPR,减少环境污染和创造经济价值提供了可持续的解决方案.
关键词:
含有的残留物 含有的残留物在Pb的液化动力学上,Pb{3}O{4} Pb{3}O{4} Pb{3}O{4} Pb{3}O{4} Pb{3}O{4} Pb{3}O{4} Pb{3}O{4} Pb{3}O{4} Pb{4}O{5} Pb{3}O{4} Pb{3}O{4} Pb{4}O{5} Pb{4}O{5} Pb{4}O{6} Pb{3}O{4} Pb{4}O{5} Pb{3}O{4} Pb{4}O{5} Pb{4}O{6} Pb{4}O{6} Pb{3}O{6} Pb{4}O{6} Pb{4}O{6} Pb{3}O{7} Pb{4}O{6} Pb在PbO中,PbO是PbO.热分解 热分解相关概念视频
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