摘要
为探讨粉煤灰对铀的吸附特性,考察pH、吸附时间、铀溶液浓度对吸附能力的影响,测定了吸附等温线和吸附动力学。结果表明:其吸附等温线符合Freundlich和Langmuir吸附模型,pH值是影响铀去除率的主要因素,吸附铀的最佳pH=5,铀初始浓度越高,粉煤灰的吸附量越高。实验可为地下水复原特别是采用粉煤灰渗透反应墙修复受放射性污染的地下水提供设计依据。
The effect of pH,time and different initial concentration were examined to study the properties of sorption of uranium by fly ash.The isotherm was drawn and in accordance with Langmuir and Freundlich adsorption model.Results showed that pH value was the major factor of dominating adsorption rate.The highest adsorption capacity was obtained when pH value was about 5 and time was 60min.Quantity of adsorption was increased along with increased concentration of initial uranium solution.The experiment can provide guidance for design of contaminated groundwater remediation especially fly ash zeolites treatment wall process to remediate groundwater with radiocontamination.
出处
《环境科学与技术》
CAS
CSCD
北大核心
2007年第1期3-4,65,共3页
Environmental Science & Technology
基金
国家自然科学基金资助项目(10475038)
湖南省自然科学基金资助项目(05JJ30094)
关键词
粉煤灰
吸附等温线
铀
fly ash
adsorption isotherm
uranium
