摘要
不同试验结果表明,泥煤具有一定缓冲性,其以两种方式吸附镍:pH>4时,以离子交换吸附为主;pH<4时,可能以物理吸附为主.溶液化学计算表明,虽然泥煤界面区域镍离子的溶度积小于它在溶液中溶度积,但是由于泥煤界面区域镍离子浓度小于界面pH值所对应的形成沉淀的最小浓度,镍离子在泥煤表面不能以沉淀形式被“吸附”,而是继续以离子交换方式被泥煤吸附.
The experiments show that there are two adsorption mechanisms for nickel onto buffering peat. The ionexchange dominates the adsorption of nickel onto peat when pH 〉 4, however physical-adsorption does below when pH 〈 4 possibly. Although solubility product of nickel ion in peat interface zone is smaller than solubility product in solution, due to concentration of nickel ion in peat interface zone which is smaller than the settling density formed by pH of interface, nickel ion on peat would not be existed on a surface settling means instead of ion-exchange.
出处
《煤炭学报》
EI
CAS
CSCD
北大核心
2006年第3期369-372,共4页
Journal of China Coal Society
基金
国家留学基金管理委员会资助项目(22307S05)
东华理工学院博士基金资助项目(DHB0504)
核资源与环境教育部重点实验室开放基金资助项目(051104)
关键词
镍
泥煤
吸附
PH
溶液化学
nickel
peat
adsorption
pH
solution chemistry
