EfOM与四甲基铵根离子非共价强相互作用强化纳滤去除微电子废水中TMAH机制及调控研究

微电子废水含大量四甲基氢氧化铵（TMAH），二级生化出水中往往残留较高浓度有毒有害四甲基铵根离子，研究发现二级生化出水有机物（EfOM）能够显著强化纳滤截留四甲基铵根离子，然而目前对其作用机制尚不明晰。本项目围绕EfOM与四甲基铵根离子间非共价强相互作用强化纳滤去除TMAH机制以及调控策略展开研究，阐释荷负电EfOM与四甲基铵根离子间静电相互作用对纳滤截留性能的强化机制，明晰多芳环EfOM与四甲基铵根离子间阳离子−π相互作用对纳滤截留四甲基铵根离子的影响机制，揭示在非共价强相互作用影响下EfOM孔堵所带来额外尺寸筛分效应强化纳滤截留性能的作用机制，在此基础上确立基于水化学条件和纳滤膜改性的调控策略。项目预期能够阐明EfOM与四甲基铵根离子间非共价强相互作用强化纳滤去除TMAH的机理，确立纳滤去除微电子废水中TMAH的调控措施，为高效处理微电子废水提供技术支撑，保障微电子工业的高速发展。

Microelectronics wastewater contains a large amount of tetramethylammonium hydroxide (TMAH) and the secondary effluent after biochemical treatment still contains a high concentration of hazardous tetramethylammonium ion. Our preliminary study found that the effluent organic matter (EfOM) can significantly enhance the rejection of tetramethylammonium ion in the nanofiltration process. However, the mechanism of enhanced removal of TMAH by EfOM in the nanofiltration process is still unclear. This project aims to investigate the mechanism of enhanced removal of TMAH by strong non-covalent interactions between EfOM and tetramethylammonium ion as well as establish optimization strategies by focusing on the interactions among EfOM, tetramethylammonium ion, and nanofiltration membrane. This project will clarify the impacts of electrostatic interaction between negatively charged EfOM and tetramethylammonium ion on the removal of tetramethylammonium ion, elucidate the influence of the cation-π interaction between the polyaromatic EfOM and tetramethylammonium ion on the rejection of tetramethylammonium ion by the nanofiltration, unveil the impacts of the additional sieving effect caused by the pore blockage of EfOM on the rejection of tetramethylammonium ion given the strong non-covalent interactions between EfOM and tetramethylammonium ion. On basis of the study, an optimized regulation strategy based on water chemistry and nanofiltration membrane modification will be proposed. The project is expected to clarify the role of strong non-covalent interaction between EfOM and tetramethylammonium ion in removing TMAH from microelectronics wastewater by nanofiltration and establish the optimal regulation protocols, which can provide solid technical support for the efficient treatment of microelectronics wastewater and reinforce the rapid development of microelectronics industry.