高效的无金属电化学膜可以从尿废水中恢复零价值的硫
Mingmei Ding1, Houzhen Zhou1, Hang Xu1
1College of Environment, Hohai University, No.1 Xikang Road, Nanjing 210098, PR China.
Water research
|January 7, 2025
概括
一种新的无金属碳纳米管 (CNT) 膜有效地从尿素 (TU) 废水中回收零价值硫 (S0). 这种可持续的方法克服了电极中毒,在水处理中有效地循环使用硫资源.
科学领域:
- 环境化学环境化学
- 材料科学 材料科学 材料科学
- 电化学 电化学 电化学
背景情况:
- urea (TU) 废水处理在电化学硫回收过程中面临诸如电极中毒和硫过氧化等挑战.
- 开发高效和稳定的电极对于硫资源管理中的废物价值化策略至关重要.
研究的目的:
- 设计和评估一种无金属碳纳米管 (CNT) 电化学膜,用于选择性硫氨酸氧化和零价值硫 (S0) 恢复.
- 研究在CNT表面上硫尿素氧化和S0生成的机制.
- 用真实的工业废水评估系统的效率,能源消耗,耐用性和稳定性.
主要方法:
- 制造一种无金属的CNT电化学膜.
- 硫氨酸废水的电化学处理.
- 分析CNT上的缺陷点及其在电子转移和键形成中的作用.
- 性能评估包括移除效率,回收率,能源消耗和耐用性测试.
主要成果:
- CNT膜证明了氨酸的选择性氧化和有效的S回收,从工业废水中获得了95.4%的TU去除和83.8%的S回收.
- 在CNT上的缺陷点促进了直接的电子转移和碳-硫键的形成,促进了S0生成.
- 与商业电极相比,该系统的能耗较低 (3.3 kWh kg-TU-1用于处理,9.9 kWh kg-S-1用于回收).
- 膜系统在连续运行48小时的过程中显示出出色的耐用性和稳定性.
结论:
- 开发的无金属CNT电化学膜为TU废水中S回收提供了一种高效和可持续的方法.
- 这项技术推进了电化学膜设计,用于资源回收和经济废物管理.
- 这些发现有助于促进硫资源循环利用和减轻工业废水造成的环境污染.
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