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矿物土壤对氟离子的吸附特性研究 被引量:1

Study on Adsorption Character of Fluorion by Mineral Soil
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摘要 选用三种矿物土壤,研究它们对氟离子的吸附特性,探讨投加量、吸附时间、pH以及煅烧温度等因素的影响.结果表明:不同土壤对氟离子具有不同的吸附能力,郴州土壤对氟离子的饱和吸附量可达909.09mg/kg,吸附行为符合Langmuir方程式;当矿物土壤的投加量为30.g/L时,吸附行为可在5.h内达到平衡,pH的变化对矿物土壤的吸附能力影响不明显;将土壤经过高温煅烧后,吸附能力会有所增加,经过300.℃煅烧的矿物土壤对氟离子的吸附效果最佳,比煅烧前增加了19.2%. Three types of mineral soil were selected to discuss the effect of mass,adsorbed time,pH and calcination temperature on fluorion adsorbed. The results showed that there is certain fluorion adsorption capacity for soil. The maximum adsorption capacity of fluorion could reach 909.09 mg/kg by soil from Chenzhou,and the adsorption behavior was identical with the Langrnuir model. When optimum dosage was 30 g/L,the adsorption behavior would balance in five hours, changes in pH have little effect on the adsorption capacity of the soil. After high calcination temperature, fluorion adsorption capacity of soils could be enhanced in some degree,the optimum calcination temperature is 300℃ ,adsorption capacity is increased 19.2%.
出处 《天津科技大学学报》 CAS 2009年第6期30-34,共5页 Journal of Tianjin University of Science & Technology
基金 天津市农委重大资助项目(0604140)
关键词 土壤 氟离子 吸附 煅烧温度 soil fluorion adsorption calcination temperature
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