摘要
试验了活性炭对无机汞和苯基汞的吸附和解吸行为。结果表明,在活性炭用量为0.2g,φ=0.5%的王水介质中搅拌1.5h,无机汞和苯基汞的吸附率均达96%以上,无机汞和苯基汞的吸附容量分别为82.5μg/g和66.0μg/g。吸附后的无机汞和苯基汞分别用含有60mgEDTA的2.8mol/LHNO3溶液和5.6mol/LHNO3-1.0mol/LH2SO4溶液定量洗脱,用冷原子吸收光谱法测定,实现了无机汞和苯基汞的定量分离。对2μg/L的无机汞和苯基汞进行测定,相对标准偏差(n=11)分别为5.4%和6.2%。在实际水样中加标回收和测定,无机汞和苯基汞的回收率分别为97.8%～108%、94.0%～106%。
The adsorption and desorption behaviors of inorganic mercury and phenyl mercury by activated carbon has been studied. Experiments showed that inorganic mercury and phenyl mercury could be adsorbed by activated carbon in 0.5% aqua regia with adsorption time of 1.5 hours. The adsorption percentage was 97% for inorganic mercury and 96.5% for phenyl mercury. When 60 mg EDTA-2.8 mol/L HNO_(3) solution and 5.6 mol/L HNO_(3 )-1.0 mol/L H_(2)SO_(4) solution were used as eluent, inorganic mercury and phenyl mercury on activated carbon could be quantitatively eluted respectively. The adsorption mechanism is discussed. Combined with atomic adsorption spectrometry mercury in environmental water samples was determined. The recoveries were 97.8%～108% with precision of 5.4% RSD(n=11) for inorganic mercury and 94.0%～106% with precision of 6.2% RSD(n=11) for phenyl mercury.
出处
《岩矿测试》
CAS
CSCD
北大核心
2004年第4期263-267,共5页
Rock and Mineral Analysis
基金
广西自然科学基金资助项目(桂科自0135045)
