摘要
分光光度法研究了强酸性介质中松针对Cr()的吸附与转化过程。探讨了干松针的用量,反应时间,K2Cr2O7浓度对转化率的影响。在优化的条件下,K2Cr2O7溶液经松针处理6h后的转化率为91.96%,转化的表观一级反应速率常数为0.008764min-1,K2Cr2O7的浓度在0.2—0.4mmol/L范围内受吸附控制,0.4—1.5mmol/L转化受化学反应控制。为天然生物质吸附转化Cr()的污染治理提供新途径。
The process of the adsorption and transformation of Cr（Ⅵ） with pine needle in strong acid medium was studied by spectrophotometry.The effects of the amount of pine needle,reaction time and concentration of K2Cr2O7 on the transformation rate were considered.Under the optimal conditions,K2Cr2O7 aqueous solution was treated with pine needle for 6h,and transformation rate was upto 91.96%,the apparent first-order reaction was obtained as 0.008764min-1.The transformation process was controlled by adsorption of K2Cr2O7 in the concentration range of 0.2—0.4mmol/L,and controlled by chemical reaction in the range of 0.4—1.5mmol/L.The results are significant in the treatment of Cr（Ⅵ） by biological material,and offers a new way for the pollutants treatments in environment sciences.
出处
《光谱实验室》
CAS
CSCD
2012年第2期677-680,共4页
Chinese Journal of Spectroscopy Laboratory
基金
国家自然基金(20875063)
辽宁省教育厅资助项目(2004-c022)
