Zou Yiting, Ge Qingchun
College of Environment and Safety Engineering, Fuzhou University, No.2 Xueyuan Road, Fujian 350116, China.
Environ Sci Technol. 2023 Apr 11;57(14):5872-5880. doi: 10.1021/acs.est.3c00084. Epub 2023 Mar 28.
The demand to effectively treat medical wastewater has escalated with the much greater use of antiviral drugs since the COVID-19 pandemic. Forward osmosis (FO) has great potential in wastewater treatment only when appropriate draw solutes are available. Here, we synthesize a series of smart organic-inorganic polyoxomolybdates (POMs), namely, (NH)[MoO], (PrNH)[MoO], (PrNH)[MoO], and (BuNH)[MoO], for FO to treat antiviral-drug wastewater. Influential factors of separation performance have been systematically studied by tailoring the structure, organic characteristics, and cation chain length of POMs. POMs at 0.4 M produce water fluxes ranging from 14.0 to 16.4 LMH with negligible solute losses, at least 116% higher than those of NaCl, NHHCO, and other draw solutes. (NH)[MoO] creates a water flux of 11.2 LMH, increased by more than 200% compared to that of NaCl and NHHCO in long-term antiviral-drug wastewater reclamation. Remarkably, the drugs treated with NHHCO and NaCl are either contaminated or denatured, while those with (NH)[MoO] remain intact. Moreover, these POMs are recovered by sunlight-assisted acidification owing to their light and pH dual sensitivity and reusability for FO. POMs prove their suitability as draw solutes and demonstrate their superiority over the commonly studied draw solutes in wastewater treatment.
自新冠疫情以来，随着抗病毒药物使用量的大幅增加，有效处理医疗废水的需求不断升级。只有在有合适的汲取溶质时，正向渗透（FO）在废水处理方面才具有巨大潜力。在此，我们合成了一系列智能有机 - 无机多金属氧酸盐（POMs），即(NH)[MoO]、(PrNH)[MoO]、(PrNH)[MoO]和(BuNH)[MoO]，用于正向渗透处理抗病毒药物废水。通过调整POMs的结构、有机特性和阳离子链长度，系统研究了分离性能的影响因素。0.4 M的POMs产生的水通量在14.0至16.4 LMH之间，溶质损失可忽略不计，比NaCl、NHHCO和其他汲取溶质至少高116%。(NH)[MoO]产生的水通量为11.2 LMH，在长期抗病毒药物废水回收中，与NaCl和NHHCO相比增加了200%以上。值得注意的是，用NHHCO和NaCl处理的药物要么被污染要么变性，而用(NH)[MoO]处理的药物保持完好。此外，由于这些POMs具有光和pH双重敏感性以及正向渗透的可重复使用性，它们可通过阳光辅助酸化回收。POMs证明了它们作为汲取溶质的适用性，并在废水处理中展示了优于常用汲取溶质的优势。
