在地下水过器中的铁基吸附剂上的生物化氧化
Emiel Kruisdijk1, Roos Goedhart1, Doris van Halem1
1Delft University of Technology, Faculty of Civil Engineering and Geosciences, Department of Water Management, Stevinweg 1, 2628 CN Delft, the Netherlands.
Water research
|July 25, 2024
概括
饮用水过器中 (As) 的生物氧化增强了的去除. 这种生物过程将有毒的 (III) 转化为 (V),该更有效地被铁基材料吸收,提高了水处理效率.
科学领域:
- 环境科学 环境科学
- 水处理技术水处理技术
- 微生物学 微生物学
背景情况:
- 铁基吸附剂对于从饮用水中去除至关重要.
- 了解的物种化 (As(III) 与As(V) 是优化去除效率的关键.
- 微生物活动在吸附剂上去除的作用往往被忽视.
研究的目的:
- 研究生物氧化对水过器中的铁基吸附剂的影响.
- 为了确定氧化速率和条件.
- 评估这种生物氧化对总体吸收的影响.
主要方法:
- 实验室尺度过器的操作,使用铁氧化物涂层沙 (IOCS) 与 (III) 和 (V) 在水中.
- 定期采样和分析过器高度的水.
- 使用亚酸来抑制微生物活动,以确认生物氧化.
主要成果:
- 10天后开始氧化,57天后达到0.09s-1的第一阶速常数.
- 亚III的完全氧化发生在50秒以下.
- 微生物抑制阻止了氧化,证实了其生物性质.
- 在pH<8.0的情况下,As (V) 的吸附能力高达As (III) 的10倍.
结论:
- 氧化生物质可以在水过器中的铁基吸附剂上自然生长.
- 生物氧化可能广泛存在,但在全面的处理厂中被忽视.
- 优化过器,包括一个生物的As(III) 氧化层,其次是As(V) 吸附层,可以增强的去除.
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