Liu Yong, Xu Xin-hua, He Ping
Department of Environmental Engineering, Zhejiang University, Hangzhou 310027, China.
J Zhejiang Univ Sci B. 2005 Jun;6(6):540-2. doi: 10.1631/jzus.2005.B0540.
The effectiveness of vitamin C in treating Cr(VI)-contaminated water is being evaluated. Cr(VI) is an identified pollutant of some soils and groundwater. Vitamin C, an important biological reductant in humans and animals, can be used to transform Cr(VI) to essentially nontoxic Cr(III). The removal efficiency was 89% when the mass concentration of vitamin C was 80 mg/L in 60 min, and nearly 100% Cr(VI) was removed when the mass concentration was 100 mg/L. Our data demonstrated that the removal efficiency was affected by vitamin C concentration, the reaction temperature and the dissolved oxygen concentration. The reaction mechanism of Cr(VI) by vitamin C was presented. Our study opens the way to use vitamin C to remediate Cr(VI)-contaminated soils and groundwater.
维生素C处理六价铬污染水的有效性正在评估中。六价铬是某些土壤和地下水已确认的污染物。维生素C是人和动物体内一种重要的生物还原剂，可用于将六价铬转化为基本无毒的三价铬。当维生素C的质量浓度为80mg/L时，60分钟内去除效率为89%，当质量浓度为100mg/L时，六价铬几乎被完全去除。我们的数据表明，去除效率受维生素C浓度、反应温度和溶解氧浓度的影响。文中还阐述了维生素C对六价铬的反应机制。我们的研究为利用维生素C修复六价铬污染的土壤和地下水开辟了道路。
