摘要
初步探索了稳定同位素比例技术对水蒸气活化法生产的椰壳、杏壳和煤质来源的活性炭种类进行鉴别,通过统计产品与服务解决方案(SPSS)软件统计分析了65个活性炭样品后发现:不同原料活性炭的碳同位素比值(δ^(13)_C)不同,煤质活性炭的δ^(13)_C在-24.3‰^-22.1‰;杏壳活性炭的δ^(13)_C在-25.9‰^-24.4‰;而椰壳活性炭的δ^(13)_C在-25.7‰^-24.6‰之间。分析3种活性炭的碳/氧、碳/氢同位素分布的散点图发现,以碳同位素值为纵坐标,不同种类的活性炭分散于上、中、下3个不同的区间,煤质活性炭位于Y=-24.325以上的区域,大部分杏壳活性炭分布在Y=-25.031^-24.325的区域,大部分的椰壳活性炭分布在Y=-25.031以下的区域,煤质活性炭与杏壳活性炭、椰壳活性炭具有非常明显的区别。虽然杏壳和椰壳活性炭的δ^(13)_C之间有差异,但二者仍有部分的重叠。利用这一结果对3种活性炭进行验证,结果表明对煤质活性炭的判别率为100%,对杏壳活性炭判别率为40%,对椰壳活性炭判别率为90.32%。
The study is about the identification of activated carbon, which was made by vapor activation, from coconut shell, almond shell and coal was preliminarily studied by stable isotope ratio technique. Statistical Package for the Social Sciences （SPSS） statistics of 65 kinds of activated carbon found that the 813c values of coal-based activated carbon, the almond shell activated carbon and the coconut shell activated carbon were -24.3 %o--22.1%v, -25.9%v--24.4%v and -25.7%v--24.6%~, respectively. Further studies analyse of the relationship between 813c and 818o ,813c and 82H, the t313c value asvertical axis showed that the gl3cvalues of different kinds of activated carbon were located in different interval. The 13c values of coal-based activated carbon were above Y=-24.325, which could distinguish clearly from almond shell and coconut shell activated carbon. Between Y=-25.031 and Y=-24.325. The most part of S13cvalues of the almond shell activated carbon were Y= -25.031 - -24.325 and those of the coconut shell activated carbon were below Y= -25.031. Although the interval of coconut shell and almond shell activated carbon were different, but part of those were overlap. According to this model, the correct classification of activated carbon from coal, almond shell and coconut shell were 100 %, 40 % and 90.32 %.
出处
《林产化学与工业》
EI
CAS
CSCD
北大核心
2018年第1期18-24,共7页
Chemistry and Industry of Forest Products
关键词
稳定同位素
活性炭
鉴别
stable isotope
activated carbon
identification
