Abstract:The effects of NB (nitrobenzene) concentration, ZVI (zero-valent iron) concentration and pH on the reduction of NB by ZVI were studied. The results showed that, the degradation rate constants of NB were -0.02991, -0.0165 and-0.00783 for 100, 50 and 25g/L ZVI contained system respectively under the conditions of NB concentration 311.25mg/L and pH 7. When the concentration of ZVI was 50g/L and pH 7, the degradation rate constants of NB were -0.01532、-0.01235 and -0.00891 for 127.5, 311.25 and 467.01mg/L NB contained system respectively. When the initial concentration of NB was 311.5mg/L and the concentration of ZVI was 50g/L, the maximum degradation efficiency of NB appeared at the pH 2.94. The minimum degradation efficiency of NB appeared at the pH 11.89. It is suggested that the acidic environment was not conductive to the reduction reaction. Therefore, the initial concentration of NB,the ZVI content and pH had significant impact on the reduction of NB.
苏燕, 赵勇胜, 赵妍, 薄艳蓉, 王贺飞, 王玮瑜. 工业铁屑(零价铁)还原硝基苯影响因素研究[J]. 中国环境科学, 2012, 32(8): 1452-1455.
SU Yan, ZHAO Yong-Sheng, ZHAO Yan, BAO Yan-Rong, WANG He-Fei, WANG Wei-Yu. Study on the reduction of nitrobenzene by industrial iron (zero-valent iron). CHINA ENVIRONMENTAL SCIENCECE, 2012, 32(8): 1452-1455.