摘要
本文提出了以3.0 mol/L HNO3活化后的三钛酸钠晶须作为吸附剂,以火焰原子吸收光谱法为检测手段,详细探讨了三钛酸钠晶须对Pb（Ⅱ）的吸附和解脱行为。考察了影响其吸附和解脱的主要因素,研究了三钛酸钠晶须对其他常见离子的吸附情况及其对Pb（Ⅱ）的吸附等温线。结果表明：在pH 5.0时,0.20 g三钛酸钠晶须对Pb（Ⅱ）的吸附效果最好；10 mL 2.0 mol/L HCl作为解脱剂对Pb（Ⅱ）的解脱完全;静态饱和吸附容量可达36.08 mg/g；方法的检出限为0.016 mg/L。该吸附剂用于环境水样中痕量铅的测定,回收率为96.5%-98.0%。
By using sodium trititanate whisker activated previously with 3.0 mol/L of HNO3 as solid sorbent,flame atomic absorption spectrometry （FAAS） as testing method ,the adsorption and elution behavior of the sodium trititanate whisker to Pb（Ⅱ） has been discussed in detail. The main factors that would affect adsorption and elution , the adsorption condition of sodium trititanate whisker to other normal ions and its adsorption isotherm to Pb（Ⅱ） were investigated. The results indicated that Pb（Ⅱ）could be adsorped with 0.20 g of sodium trititanate whisker and eluted with 10 mL of 2.0 mol/L HCI satisfactorily. The greatest static adsorption capacity of sodium trititanate whisker for Pb（Ⅱ） is 36.08 mg/g,and the detection limit is 0.016 mg/L. The proposed sorbent has been applied to the determination of trace Pb（Ⅱ） in environmental water samples with the recovery of 96.5%-98.0%.
出处
《冶金分析》
EI
CAS
CSCD
北大核心
2008年第10期57-60,共4页
Metallurgical Analysis
基金
科技部基金资助项目(05C26213100474)
江苏大学高级人才基金(04JDG017)
关键词
三钛酸钠晶须
分离富集
火焰原子吸收光谱法
Pb(Ⅱ)
sodium trititanate whisker
separation and concentration
flame atomic absorption spec-trometry ~ lead
