Superhydrophobic coating on quartz sand filter media for oily wastewater filtration
Superhydrophobic coating on quartz sand filter media for oily wastewater filtration
复制标题
用于含油废水过滤的石英砂过滤介质上的超疏水涂层
DOI：
10.1016/j.colsurfa.2018.06.007
复制
发表时间：
2018-09-20
影响因子：
5.2
通讯作者：
Chang Qing
中科院分区：
文献类型：
--
作者：
Liu Jianlin;Zhu Xiaofei;Chang Qing
深床过滤是含油废水除油的常用方法。滤料的润湿性对除油效率有很大影响。疏水性和亲油性强的过滤器具有较高的除油效率。为了提高石英砂滤料的疏水性和亲油性，在石英砂滤料上涂覆了纳米氧化锌和十八烷基三氯硅烷(OTS)。用扫描电子显微镜、红外光谱和X射线光电子能谱分析了填料的形貌和化学组成，并通过吸附容量和除油效率实验评价了其除油性能。结果表明，OTS分子通过化学键接枝到石英砂过滤器表面，制备的OTS/氧化锌涂层石英砂过滤器具有超疏水性和亲油性，其水接触角为154.1度，油接触角为0度。OTS/氧化锌涂层石英砂过滤器具有很高的机械稳定性和耐酸性。超疏水石英砂滤料应用于含油废水处理后，处理含油废水的性能大大提高，可用于含油废水的过滤，取得较高的除油效率。
Deep bed filtration is commonly used to remove oil from oily wastewater. The wettability of the filter media greatly influences the oil removal efficiency. A filter with a strong hydrophobicity and oleophilicity results in a higher oil removal efficiency. To improve the hydrophobicity and oleophilicity, ZnO nanoparticles and octa-decyltrichlorosilane (OTS) were coated on quartz sand filter media. SEM, FTIR and XPS were used to study the morphology and chemical composition of the fillers, and adsorption capacity and oil removal efficiency experiments were performed to assess the oil removal performance. The results show that the OTS molecules are grafted onto the surface of the quartz sand filter through chemical bonding, and the OTS/ZnO-coated quartz sand filter is superhydrophobic and oleophilic, with a water contact angle of 154.1 degrees and an oil contact angle of 0 degrees. The OTS/ZnO-coated quartz sand filter has very high mechanical stability and acid resistance. The oily wastewater treatment performance is greatly improved after application of the OTS/ZnO coating, and the superhydrophobic quartz sand filter media can potentially be used to filter oily wastewater and achieve high oil removal efficiency.