乳化液膜法对废水中酚的高效去除与富集

采用绿色高效的乳化液膜法(GELM)去除与富集废水中的酚类污染物，建立了以棕榈油和煤油混合物(7:3)为膜溶剂、聚异丁烯多丁二酰亚胺(T-155)为表面活性剂、正辛醇为载体的乳化液膜体系，提高了GELM法分离酚的能力，并研究了各因素对液膜稳定性及对废水中苯酚的分离富集效果的影响。乳化液稳定性和分离酚的实验结果表明，在最优条件下，乳液稳定性好，且该乳化液膜对废水中苯酚和COD去除率分别为99.5%和74%，对邻甲酚、邻氯苯酚、邻氨基苯酚等酚类污染物的除酚率均达~99%，在初始酚浓度4000 mg·L⁻¹时，除酚率仍然达~90%，说明该体系可实现对酚的高效去除。此外乳化液膜对苯酚的富集倍数随乳外比的增大而增大，在乳外比为1∶10时苯酚富集约16倍，说明该体系实现了对苯酚的有效富集。研究结果可为废水中酚类污染物的去除与资源化回收提供绿色、高效、低成本解决方法。

Efficient removal and enrichment of phenol from wastewater via emulsion liquid membrane method

A green and high-efficient emulsion liquid membrane (GELM) method was developed to remove and enrich phenol pollutants from phenol contaminated wastewater. The emulsion liquid membrane was established with a mixture of palm oil and kerosene (7∶3) as membrane solvent, polyisobutylene polysuccinimide (T-155) as surfactant, and n-octanol as carrier, which improved phenol removal ability by GELM. The effects of various factors on the stability of emulsion liquid membrane and the separation and enrichment effect of phenol in wastewater were studied. The results of emulsion liquid stability and phenol separation experiments showed that under the optimal conditions, the emulsion was stable, and the removal rates of phenol and COD were 99.5% and 74%, respectively. The removal rates of o-cresol, o-chlorophenol and o-aminophenol reached 99%. When the initial phenol concentration was 4000 mg·L−1, the removal rate of phenol was still close to 90%, indicating the system can remove phenol efficiently. In addition, the enrichment ratio of phenol increased with the emulsion ratio. When the emulsion ratio was 1∶10, the enrichment of phenol was about 16 times, indicating the proposed scheme could effectively enrich phenol. This research provided a green, efficient, and low-cost solution for the removal and recycling of phenol pollutants in wastewater.