Authors: LeXian Xia Zhen Shen Tomas Vargas WenJuan Sun RenMan Ruan ZhenDa Xie GuanZhou Qiu
Publish Date: 2013/08/24
Volume: 35, Issue: 12, Pages: 2129-2136
Abstract
Attachments of Acidithiobacillus ferrooxidans ATCC 23270 onto elemental sulfur quartz and complex chalcopyrite were investigated by analysis of its extracellular polymeric substances as well as applying Langmuir and Freundlich equations The two equations fitted the adsorption equilibrium data with significant correlation coefficient over 09 This indicated that bacterial attachment is complicated and involves Langmuir and Freundlich characterizations Sulfurgrown cells showed the highest affinity for the three solid substrates The investigated complex chalcopyrite possessed a higher maximum adsorption capacity for A ferrooxidans than elemental sulfur or quartz The Freundlich fitting parameters suggested that quartz had a weaker adsorption capacity and smaller adsorption areas than elemental sulfur or the complex chalcopyrite It is not the content of total carbohydrates or proteins in EPS but their ratios that determine the affinity differences between cells and substratesThis work was supported by the National Science Foundation of China 20803094 the Postdoctoral Foundation of China 2012T50710 the Science and Technology Program of Hunan Province 2011RS4068 We would like to thank Dr Paulina Uribe for her revision for this paper
Keywords: