摘要
基于炭浆法吸金原理,通过实验计算得出煤质活性炭和木质活性炭的吸金容量,当CCl4吸附值>55%时,煤质活性炭的吸金容量超过了木质活性炭的吸金容量,特别是当CCl4吸附值为63%时,煤质活性炭的吸金容量达64 g/kg,说明煤质活性炭的吸金容量可以达到木质活性炭的吸金效果;通过低温氮物理吸附法(BET)、XRD、FT-IR以及SEM和TEM等表征手段分析和比较了煤质活性炭和木质活性炭的微观结构对其吸金性能的影响。结果表明不仅比表面积、孔容以及孔结构和石墨化程度是影响其吸金效果的重要参数,而且活性炭微孔表面性能也是关键参数。对于煤质吸金活性炭,微孔结构越发达,石墨化程度越低,则吸金容量越大;在发达的微孔结构中较多种类的含氧官能团有利于增加其吸金容量。这些结果为研发吸金效果更好的煤质活性炭及其制备工艺提供了一定的理论基础和技术指导。
Based on the carbon in pulp process（CIP）,the gold adsorption capability of coal activated carbon and wooden activated carbon were calculated.The results show that the gold adsorption capability of coal activated carbon was more than that of wooden activated carbon when the adsorption value of CCl4 was above 55 mg/g,especially when the adsorption value of CCl4 was around 63 mg/g,the gold adsorption capability of coal activated carbon reached up to 64 g/kg,indicating that the gold adsorption capability of coal activated carbon is the same as or better than that of wooden activated carbon.The effects of activated carbon（based coal and wood） on microstructure and gold adsorption capability were analyzed with BET,XRD,FT-IR,SEM and SEM.It is shown that the surface properties of activated carbon′s micropore was the major influence factor of gold adsorption performance,besides the texture charactersitcs including microporous surface areas,pore volume,and pore structure.For coal activated carbon,the gold adsorption capacity increased with the developed microporous structure and decreased with graphitization degree.Particularly,the remains of oxygen-containing functional groups in the micropore surface were in favor of increasing the gold adsorption capacity.It is very benefit for theoretical basis for the research and development of coal activated carbon with the excellent gold adsorption performance and the technological support for the relative application of coal activated carbon in the gold adsorption industry.
出处
《化学试剂》
CAS
CSCD
北大核心
2011年第3期245-249,285,共6页
Chemical Reagents
关键词
氰化炭浆法
吸金容量
活性炭
cyanide carbon-in-pulp process
the gold adsorbed capacity
activated carbon
