CAJ | 학술논문

为了探明细菌在黄铜矿表面的吸附机制,采取短期吸附的实验方法,研究吸附时间、矿浆浓度、细菌浓度、pH值和离子强度等因素对吸附行为的影响.结果表明,细菌吸附量随初始细菌浓度和矿浆浓度的增加而增大.Acidithiobacillus ferrooxidans在黄铜矿表面的最佳吸附pH范围为1-3.离子强度的增大会抑制细菌吸附,这一现象可以通过双电层理论得到很好的解释.细菌与黄铜矿的吸附行为受疏水性和静电作用力共同影响.
위료탐명세균재황동광표면적흡부궤제,채취단기흡부적실험방법,연구흡부시간、광장농도、세균농도、pH치화리자강도등인소대흡부행위적영향.결과표명,세균흡부량수초시세균농도화광장농도적증가이증대.Acidithiobacillus ferrooxidans재황동광표면적최가흡부pH범위위1-3.리자강도적증대회억제세균흡부,저일현상가이통과쌍전층이론득도흔호적해석.세균여황동광적흡부행위수소수성화정전작용력공동영향.
The influencing factors in adsorption such as adsorption time,pulp concentration,bacterial concentration,pH as well as ionic strength were investigated to explore the relationship among them and bacterial adsorption.The adsorption was a rapid process for bacterial adhesion to chalcopyrite.The extent of adsorption increased with increasing initial bacterial concentration and pulp concentration.The optimal pH for Acidithiobacillus ferrooxidans adsorption onto chalcopyrite surfaces was in the range of pH 1-3.The increase of ionic strength led to decrease in bacterial adsorption,which can be well explained by electric double layer theory.The adsorption behavior appeared to be controlled by both hydrophobic and electrostatic interactions at the interface of bacteria and mineral.