Interfacial interaction of bio-leaching of pyrite mineral

来源期刊：中南大学学报(英文版)2008年第1期

论文作者：顾帼华 王晖 锁军 邱冠周 郝野

文章页码：49 - 49

Key words：extended DLVO theory; surface energy; thiobacillus ferrooxidans; pyrite; contact angle

Abstract: Electrokinetic and contact angle measurements were used to discuss the interfacial interaction on bio-leaching of pyrite mineral. Surface energy parameters of pyrite mineral and thiobacillus ferrooxidans were obtained by calculating according to formula of Young’s equation and contact angle measurements. The results show that surface energy of thiobacillus ferrooxidans is much higher than that of pyrite mineral, and the reaction of pyrite mineral with thiobacillus ferrooxidans causes the reduction of the pyrite surface energy. The interfacial interaction energies between pyrite mineral and thiobacillus ferrooxidans were also obtained based on polar interfacial interaction theory and electrokinetic and contact angle measurements. The thermodynamics approach only considering Lifshitz-van der Waals and Lewis acid-base interaction fails to explain the adhesion behavior of the bacteria, but the extended Derjaguin-Landan-Verwey-Overbeek theory concerning Lifshitz-van der Waals and Lewis acid-base and the electrostatic can exactly predict interfacial interaction.

基金信息：the Teaching and Research Award Program for Outstanding Young Teachers in Higher Education Institutions, China