摘要
研究了六钛酸钾对于Cr（Ⅲ）的吸附性能，提出了用六钛酸钾晶须作为富集剂，预富集、分离水中Cr（Ⅲ）的新方法。在pH值为6．0的条件下，吸附率可达到100％，吸附容量为12．3mg／g。以3mol／L的HNO3作为解脱剂，沸水浴加热40min，可将吸附在六钛酸钾上的Cr（Ⅲ）定量洗脱。火焰原子吸收光谱法（FAAS）的测定结果表明：Cr（Ⅲ）的浓度在0．20～4．0μg／mL范围内线性良好，检出限为3．5ng／mL，相对标准偏差为3．1％。在优化的试验条件下，实测了天然水中Cr（Ⅲ）的含量，加标回收率为94．0％-102．0％。
The adsorption behavior of potassium hexatitanate for Cr （Ⅲ） was studied, and a new method for pre-concentration and separation of Cr（Ⅲ） in water was put forward using its whisker as concentration agent. The adsorption rate is 100% , and the adsorption capacity is 12.3 mg/g at pH 6.0. Cr （Ⅲ） can be eluted from potassium hexatitanate whisker by elutriant （ HNO3 ） of 3 mol/L and heating in boiling water bath for 40 min. The determination results by flame atomic absorption spectrometry （FAAS） show that the linear range of Cr（Ⅲ） is 0. 20 to 4.0 μg/mL. The detection limit is 3.5 ng/mL, and the relative standard deviation （RSD） is 3.1%. Under the optimized test condition, the content of Cr（Ⅲ）in natural water is measured, and the recovery rate with standard addition is 94.0% to 102.0%.
出处
《中国给水排水》
CAS
CSCD
北大核心
2008年第22期75-77,81,共4页
China Water & Wastewater
基金
科技部创新基金(05C26213100474)
江苏省研究生培养创新工程(CX07B_176z)
