通过使用生物电子的电极激活酸:一种新的无能量和无催化剂的过程,以消除药品
Rusen Zou1, Wenqiang Yang2, Babak Rezaei3
1Department of Environmental & Ressource Engineering, Technical University of Denmark, DK-2800, Lyngby, Denmark.
Water research
|July 13, 2024
概括
一个新的生物电化学系统 (BES) 使用微生物电子激活酸 (PAA),用于废水处理. 这种无催化剂的方法有效地去除硫甲醇 (SMX) 没有外部能量,提供可持续的解决方案.
科学领域:
- 环境科学 环境科学
- 电化学 电化学 电化学
- 环境生物技术 环境生物技术
背景情况:
- 传统的酸 (PAA) 激活废水处理需要能量或催化剂,增加成本和污染.
- 现有的方法面临着诸如高成本和潜在的二次污染等挑战.
研究的目的:
- 为PAA激活开发一种无催化剂,自我维持的生物电化学系统 (BES).
- 为了研究PAA在现场激活,使用生物电子来降解污染物.
主要方法:
- 一个两室的BES利用阳极外电原来产生电子用于正极PAA激活.
- 在不同的pH条件下,硫甲醇 (SMX) 和其他药物的降解.
- 机理学研究包括激光火,ESR和DFT计算以确定反应性物种.
主要成果:
- 在pH 2下在2小时内达到98%的SMX去除,在pH 6下达到81%,使用没有外部电压的BES-PAA技术.
- 确定了CH3C(O) OOO•作为主要反应物种 (68.1%),导致SMX降解,其次是OH (18.4%) 和CH3C(O) O• (9.4%).
- 证明了像Cl-,NO3-和H2PO4-这样的离子阻碍了SMX的去除,而CO32-和HCO3-具有较小的影响.
结论:
- BES-PAA技术提供了一种生态友好且具有成本效益的废水处理方法.
- 这种方法克服了传统PAA激活的局限性,例如催化剂失活和二次污染.
- 通过CH3C的选择性降解提供了对废水中各种制药污染物的处理的见解.
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