从富含酸盐的废水中可控制和选择性化物沉
Shuyue Feng1, Wenjuan Zhang2, Jianyong Che1
1State Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing, Beijing 100083, China.
The Science of the total environment
|August 15, 2024
概括
兰氧化物有效地从工业废水中去除化物,将其与酸盐分离. 该方法在特定的酸性条件下实现了高化物去除效率,有助于资源回收.
科学领域:
- 环境化学环境化学
- 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:
- 工业废水往往含有高度的化物和酸盐,带来了环境问题和资源浪费.
- 有效地分离化物和酸盐对于废水处理和潜在的资源回收至关重要.
研究的目的:
- 调查氧化 (La(OH) 3) 作为从废水中选择性去除化物的沉剂的使用.
- 为了优化化物沉和从酸盐分离的条件.
- 了解选择性化物沉的机制.
主要方法:
- 在不同的pH值和剂量下,使用La(OH) 3进行化物和酸盐去除的实验研究.
- 使用响应表面方法 (RSM) 优化降水条件.
- 描述和密度函数理论 (DFT) 计算以确认选择性降水的机制.
主要成果:
- 确定了化物去除的最佳条件:pH值1.0-2.5,反应时间60-80分钟,La/3F摩尔比为2.0,温度为25°C.
- 在最佳条件下,化物去除效率超过96.9%,酸盐去除率最低 (约7.2%).
- DFT的计算和表征证实,在酸性条件下,选择性地沉为化 (LaF),而不是酸 (LaPO).
结论:
- (La) 是一种有效的沉剂,用于在工业废水中选择性去除和分离化物和酸盐.
- 这项研究表明,处理富含化物和酸盐的废水的可行策略,使选择性降水和回收成为可能.
- 这种方法有助于可持续的废水管理和资源回收.
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