摘要
采用纳滤膜在室温条件下对含铬废水进行处理.探讨了铬的不同形态、进料溶液中铬离子浓度、膜两侧压力对除铬效果的影响.结果表明:在实验条件下纳滤膜对Cr(Ⅵ)和Cr(Ⅲ)的去除率都很高,均大于90%,且Cr(Ⅵ)去除率稍微大于Cr(Ⅲ)的去除率.随着进料废水中铬离子浓度升高或膜两侧压力的增加,纳滤膜对其去除率均有一定程度的下降.
The wastewater containing chromium ions was treated at room temperature by nanofiltration membrane. The morphology, concentration of chromium ions and the pressure of the membrane on the rejection effect were studied. The results showed that: under the experimental conditions, the hexavalent chromium Cr(Ⅵ) and trivalent chromium Cr (Ⅲ) have a high removal rate, which are more than 90%, and Cr(Ⅵ) has slightly greater removal rate than Cr(Ⅲ). As the pressure of membrane and feed concentration of chromium ion increasing, the removal rate of nanofiltration membranes have a certain degree of decline.
出处
《湖南城市学院学报(自然科学版)》
CAS
2009年第2期58-60,共3页
Journal of Hunan City University:Natural Science
基金
湖南城市学院科技计划资助项目(08C004)
关键词
纳滤膜
六价铬
三价铬
膜分离
Nanofiltration membranes
hexavalent chromium
trivalent chromium
membrane separation