摘要
在适宜 p H值下 ,通过氨基 -膦酸基 -二硫代羧基螯合纤维与镧离子的螯合作用 ,制备了负载镧纤维吸附剂 ,探讨了该纤维吸附剂对氟离子的吸附性能 .研究表明 ,制备纤维吸附剂的最佳 p H值为 5.0～ 7.0 ,饱和负载镧量 (镧 /负载纤维 )为 1 2 6.5mg/g,与其它吸附剂相比 ,该负载纤维吸附剂对氟离子具有较好的吸附动力学特性和较高的饱和吸附容量 .较低的 p H值有利于氟离子的吸附 ,其吸附行为基本符合 Langmuir吸附等温式 ,属于单分子层化学吸附机制 .
A new type of sorbent,lanthanum(Ⅲ)loaded fiber,was prepared for the removal of fluoride ion from aqueous solutions.At pH 5.0～7.0,the poly(acrylaminophosphonicdithiocarbamate) chelating fiber was impregnated with La(Ⅲ)ion by chelating process and maximum capacity of 126.5mg/g for La(Ⅲ)ion was obtained.The adsorptive properties of the fibrous sorbent for fluoride ion such as pH effect,dose effect,adsorption isotherm and kinetics were investigated.It was shown that the fibrous sorbent had higher adsorption capacity and good kinetic property for fluoride ion.The lower pH value was available for the sorption of fluoride ion.The adsorption of fluoride ion on the adsorbent exhibited langmuir adsorption behavior.
出处
《环境科学》
EI
CAS
CSCD
北大核心
2000年第4期34-37,共4页
Environmental Science
基金
国家自然科学基金!资助项目编号 :2 99770 2 7
关键词
负载镧纤维
吸附剂
氟离子
吸附特性
La(Ⅲ)loaded fibrous sorbent
preparation
fluoride ion
adsorption properties
