Ao Yiling, He Ji'an, Chen Keming, Zhu Mingzhao, Ye Fan, Shen Liwei, Yang Ying, Feng Xuening, Zhang Zejun, Tang Yuqi, Mi Yuanzhu
School of Chemistry & Environmental Engineering, Yangtze University, Jingzhou, 434023, PR China.
CNPC Chuanqing Drilling Engineering Co. Ltd., Guanghan, 618300, PR China.
Environ Res. 2023 Nov 15;237(Pt 1):116882. doi: 10.1016/j.envres.2023.116882. Epub 2023 Aug 12.
Common commercial demulsifiers are typically made from ethylene oxide and propylene oxide. The production process is dangerous and complex, with poor adaptability and high cost. In this work, cotton modified with polyethylene polyamine was utilized as a demulsifier for the treatment of oily wastewater. The chemical structure and morphology of the as-prepared sample (CPN) were characterized by IR spectrum and SEM. The effect of CPN dosage, pH value, and salinity on the demulsification performance of oily wastewater was explored through the bottle tests. The results showed that the light transmittance of separated water was 81.7% and the corresponding deoiling rate was 98.5% when a CPN dosage of 25 mg/L was used at room temperature for 30 min. The interfacial properties were also systematically investigated, and the results indicated that CPN had better interfacial activity and a stronger reduction capability of interfacial tension compared to asphaltenes. The finding initiated and accelerated the demulsification process of oily wastewater. Based on the outstanding performance of this biomass-derived demulsifier, it shows promising potential for application in the treatment of oily wastewater.
常见的商业破乳剂通常由环氧乙烷和环氧丙烷制成。其生产过程危险且复杂，适应性差且成本高。在这项工作中，用聚乙烯多胺改性的棉被用作处理含油废水的破乳剂。通过红外光谱和扫描电子显微镜对所制备样品（CPN）的化学结构和形态进行了表征。通过瓶试研究了CPN用量、pH值和盐度对含油废水破乳性能的影响。结果表明，在室温下使用25 mg/L的CPN用量处理30分钟时，分离水的透光率为81.7%，相应的除油率为98.5%。还系统地研究了界面性质，结果表明，与沥青质相比，CPN具有更好的界面活性和更强的降低界面张力的能力。这一发现启动并加速了含油废水的破乳过程。基于这种生物质衍生破乳剂的优异性能，它在含油废水处理中显示出有前景的应用潜力。
