滴定微量量热法研究HPMBP从硝酸介质中萃取铅的热力学性质

Study of extraction of Pb(Ⅱ) with HPMBP in nitric acid using titrameter microcalorimetric method

用滴定微量量热法研究了HMPBP从硝酸介质中对Pb(Ⅱ)的萃取过程,测得了萃取体系在不同温度的热功率-时间曲线,确定了萃取过程的热效应,按照化学热力学平衡原理,利用反应热和萃取平衡常数,计算了不同温度下的热力学函数(ΔrGmθ、ΔrHmθ、ΔrSθm).

The extraction of Pb （Ⅱ ） with HMPBP was studied by using a Perfusion /titration microcalorimetric Method, The power - time curve was determined and the reaction heat at different temperatures was established. The extraction equilibrium constants （Kθ） and the thermodynamic functions （△rGmθ、△rSmθ ） at different temperatures were calculated using the reaction heat and extraction equilibrium constants.