微生物从煤中浸出锗的基础热力学  

Basic Thermodynamics on Germanium Recovery from Lignite by Microorganism

作　　者：朱云[1] 胡汉[1] 苏云生[1] 

机构地区：[1]昆明理工大学材料与冶金学院,云南昆明650093

出　　处：《云南冶金》2002年第3期106-108,113,共4页Yunnan Metallurgy

基　　金：云南省科学基金资助项目 ;项目编号 (1999E0 0 2 9M)

摘　　要：微生物浸出褐煤中锗包括两个步骤 :(1)用微生物分解褐煤中的腐植酸锗络合物 ;(2 )从褐煤上解吸锗。从反应热和吸附热、平衡吸附常数等方面研究了微生物浸出褐煤中锗的热力学基础。测定了腐植酸锗络合物的分解热为 32 8～ 76 1kJ/mol,吸附热力 2 4～ 5 3kJ/mol。测定了煤对锗的吸附平衡常数。用微生物直接浸出褐煤的锗回收率可达 85 % ,比其它方法的回收率 6 0Recovery of germanium from lignite by microorganisn is madl by of two stages:(1)breaking down the germanium humate complex in lignite into simple compounds with microorganism;(2)desorption of germanium compounds from lignite.The basic thermodynamics on microorganism leaching germanium from lignite were researched.The reaction heat,absorption heat and equilibrium constant were tested.According to experiment results,the reaction heat of germanium complex breaking-down is about 328～761 kJ/mole,and that of germanium adsorption and desorption in lignite is about 23～53 kJ/mole.The adsorption equilibrium constant of germanium in lignite was determined.The recovery rate of germanium from lignite in direct microorganism leaching is up to about 85%,Which is higher than the recovery(60%)reported by other similar researches.

关 键 词：微生物 锗 褐煤 热力学 

分 类 号：TN304.11[电子电信—物理电子学]