Abstract: PDMS composite membranes were used to treat phenol wastewater. The composite membrane consists of a thin dense selective PDMS layer coated on a microporous PSf layer. The rate of organic transfer through the approximately 10μm PDMS layer membranes is much higher than that of a 0.5mm PDMS dense membrane in the reference. In our experiments，the recovery of phenol can be 99.9% and 96.9% from 0.939g/L and 8.977g/L wastewater，respectively. The overall mass transfer coefficient (OMTC) through thin PDMS layer is up to 3.92×10－7m/s calculated by mathematic model established in this paper，larger than 1.29×10－7m/s through PDMS tube. The pH value of NaOH solution has not effect on OMTC of phenol through thin PDMS layer，according with the mathematic model established in this paper. The transfer of phenol from electrolyte solutions containing NaCl has been studied. The OMTC of phenol containing NaCl is increased dramatically.

摘要：

采用了一种新的硅橡胶复合中空纤维膜处理苯酚废水。实验中复合膜硅橡胶厚度小于10μm，较前人使用硅橡胶管处理废水时苯酚的透过速率大大加快。处理高浓度（8.977 g/L）和低浓度（0.939 g/L）的苯酚废水时，去除效果分别能达到99.9%和96.9%。通过相应的模型计算，低浓度苯酚传质系数能达到3.92×10－7m/s，比硅橡胶管处理苯酚废水传质系数（1.29×10－7m/s）有很大的提高。实验发现碱液的浓度对苯酚传质系数没有太大的影响，与作者的传质模型比较吻合。也研究了含氯化钠的苯酚的传质，发现氯化钠的存在大大增加了苯酚的传质系数。