采用天然粘土改性 PVA 膜渗透汽化工艺从废水中回收切削油。

Recovery of cutting oil from wastewater by pervaporation process using natural clay modified PVA membrane.

出版信息

Water Sci Technol. 2019 Dec;80(12):2404-2411. doi: 10.2166/wst.2020.064.

DOI:10.2166/wst.2020.064

Abstract

In this study, the pervaporative dehydration of the cutting oil 'diethylene glycol' (DEG) through a hydrophilic PVA membrane was investigated at various operation temperatures in the range of 333-363 K with a feed mixture containing 0.5-2.0 wt% water. The pervaporation (PV) performance of poly(vinyl alcohol) (PVA) is enhanced by the addition of natural clay kaolin into the pristine membrane. The thermal stability of the membranes was analyzed by thermal gravimetric analysis (TGA). The morphological analysis of the membranes was performed by scanning electron microscope (SEM). Separation success was determined by calculation of flux, selectivity, and PSI. These values were investigated as functions of the clay amount, feed concentration and feed temperature. The obtained results show that PV is an effective method for recycling waste cutting oil from wastewater.

摘要

在这项研究中，通过亲水性 PVA 膜对含有 0.5-2. 0wt%水的进料混合物中的切削油“二甘醇”(DEG)进行了在 333-363K 范围内的各种操作温度下的渗透蒸发脱水。通过在原始膜中添加天然粘土高岭土来提高聚乙烯醇（PVA）的渗透蒸发（PV）性能。通过热重分析（TGA）分析了膜的热稳定性。通过扫描电子显微镜（SEM）对膜进行了形态分析。通过计算通量、选择性和 PSI 来确定分离的成功。这些值被研究为粘土量、进料浓度和进料温度的函数。得到的结果表明，PV 是从废水中回收废切削油的有效方法。