摘要
文章旨在研究骨炭对铅的吸附性能,为利用骨炭修复铅污染的土壤做出有意义的探索。研究了骨炭对铅的吸附等温线、吸附动力学以及砷、镉和其它因素对吸附的影响。结果表明:骨炭能在短时间内吸附大量的铅离子,实验用浙江骨炭和英国骨炭对铅的饱和吸附量分别为222.2mg/g和227.3mg/g,均高于有报道的其他类型炭;骨炭对铅的等温吸附符合兰格缪尔方程;在pH2.5～6之间,英国骨炭对铅的吸附量随pH的升高略有下降,浙江骨炭对铅的吸附量随pH的升高变化不大;当支持电解质KNO3的浓度在0.005～0.1mg/L范围内逐渐增大时,英国骨炭对铅的吸附量略有减小,而浙江骨炭的吸附量变化不大;100mg/L的砷和200mg/L的镉对骨炭吸附铅离子没有显著影响;骨炭对水溶液中铅离子的吸附过程是一个复杂的非均相固液反应。
With a purpose to looking for the possibility of using bone char for remediation of contaminated soils, experiment was conducted to study Pb^2＋ adsorbed onto bone char in terms of sorption isotherms and adsorption dynamics, as well as effects of pH and ionic strength. The experiment was done using two kinds of bone char （Zhejiang and England） and the result showed that the sorption isotherms fitted well with Langmuir equation and pH and ionic strength had no significant effects on the adsorption ability. Besides, Pb^2＋ adsorption could maintain unchanged when As （100 mg/g） and Cd （200mg/g） co-existed. It was concluded that lead adsorption on bone char was involved with a sort of complicated heterogeneous solid-liquid reaction.
出处
《环境科学与技术》
CAS
CSCD
北大核心
2010年第3期88-91,共4页
Environmental Science & Technology
关键词
吸附
铅
骨炭
adsorption
lead ion
bone char
