硫化物修饰的纳米零价铁用于高盐度废水中的Cu (II) 复合体的快速消毒
Rui Li1, Xiaozhi Wang1, Xiuyun Sun2
1College of Environmental Science and Engineering, Yangzhou University, Yangzhou, 225127, China.
Environmental pollution (Barking, Essex : 1987)
|October 13, 2023
概括
硫化物修饰的纳米零价铁 (S-NZVI) 有效地从高盐度废水中去除铜-乙烯基二胺三酸 (Cu-EDTA) 复合物. 这种新的方法在具有挑战性的工业用水条件下提供了高效率和可重复使用性.
科学领域:
- 环境科学 环境科学
- 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:
- 难以从工业废水中去除重金属复合物.
- 废水中的高盐度显著阻碍了金属复合物的去除.
- 有效地去除金属复合物对于环境保护至关重要.
研究的目的:
- 开发一种新的策略来去除复杂的铜-乙烯基二胺三酸 (Cu-EDTA).
- 为了研究硫化物修饰的纳米零价铁 (S-NZVI) 在高盐度废水中的有效性.
- 评估S-NZVI. 的吸附能力,效率和可重复使用性.
主要方法:
- 硫化物修饰的纳米零价铁 (S-NZVI) 的合成.
- 使用S-NZVI从合成高盐度废水中去除Cu-EDTA的吸附实验.
- 在各种度和盐类型 (NaCl,CaCl2,MgCl2,Na2SO4,NaNO3) 下对吸附能力的评估.
- 评估广泛的pH范围和反应时间的去除效率.
主要成果:
- 即使在25g/L的NaCl中,S-NZVI也表现出Cu-EDTA的高吸附能力 (∼83毫克Cu/g) 即使在25g/L的NaCl中.
- 在各种盐的存在下保持出色的吸附性能.
- 在1分钟内实现了近乎完全的Cu-EDTA (50 mg/L) 清除,并观察到高速率常数 (kobs ≈ 1.5 g/{mg min)).
- 在5分钟内,在广泛的pH范围 (2-9) 中观察到有效的去除.
结论:
- S-NZVI是一种高效的吸附剂,可以从高盐度的工业废水中去除Cu-EDTA.
- 该材料在恶劣的水条件下表现出强大的性能,并且可重复使用.
- S-NZVI方法为处理具有挑战性的废水流提供了更简单,更有效的替代方案.
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