环境友好方法,用于从盐酸工业废水中去除和回收稀土元素
Thainara Viana1, Nicole Ferreira1, Daniela S Tavares1
1LAQV-REQUIMTE - Associated Laboratory for Green Chemistry & Department of Chemistry, University of Aveiro, 3810-193, Aveiro, Portugal.
Environmental science and pollution research international
|August 14, 2023
概括
这项研究优化了利用Ulva sp.从工业废水中提取稀土元素 (REE). 海藻,达到90%的去除,并将REEs集中在生物质中,以实现潜在的资源回收.
科学领域:
- 环境科学 环境科学
- 生物技术是生物技术.
- 材料科学 材料科学 材料科学
背景情况:
- 工业废水通常含有有价值的稀土元素 (REEs) 和有毒重金属.
- 需要有效和可持续的方法来回收REE和去除污染物.
研究的目的:
- 优化工业废水中的REEs (Y,La,Ce,Eu,Gd,Tb) 和其他金属的生物吸收,使用活的Ulva sp.
- 为了确定最大限度地消除REE和生物度的最佳条件.
主要方法:
- 使用 Box-Behnken 设计的响应表面方法 (RSM).
- 优化的操作参数包括初始元素度,废水盐度和Ulva sp. 剂量. 剂量. 这是.
- 生物吸收效率在24小时和96小时内进行了评估.
主要成果:
- 最初的海藻剂量是对元素去除产生积极影响的最重要因素.
- 在24小时内在10μg/L REEs,度15和5.0g/L Ulva sp. 的最佳条件下达到高达88%的REE去除.
- 延长接触时间 (96小时) 允许减少海藻剂量 (4.2g/L),同时实现90%以上的去除.
- 生物质实现了高REE度 (3222μg/g),明显超过原始水度和普通矿石等级.
结论:
- 乌尔瓦公司Ulva sp. 对于从工业废水中去除可再生能源和其他金属是有效的.
- 优化生物吸收提供了一种可再生能源回收和废水整治的可持续方法.
- 用REE丰富的生物质代表了关键原材料的可行的二次来源.
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