南京大学学报(自然科学版) ›› 2013, Vol. 49 ›› Issue (6): 710.
周跃飞,庆承松,汪国威,谢巧勤, 陈天虎**
Zhou Yue-Fei, Qing Cheng-Song, Wang Guo-Wei, Xie Qiao-Qin, Chen Tian-Hu
摘要: 研究了硫酸盐还原菌作用下磁性铁氧化物分解的过程及对体系磁性的影响. 实验主要考查了有/无菌及有菌+有/无硫酸盐条件下体系中物相组合、磁化率、形貌等随时间的变化. 结果表明, 研究使用的细菌具有以磁性铁氧化物为电子受体进行生长的能力; 无硫酸盐条件下, 细菌作用导致多孔磁性铁氧化物还原分解并产生超顺磁纳米微粒, 相应提高体系磁化率; 有硫酸盐条件下, SRB及代谢产物S2-还原分解磁性铁氧化物, 生成无定形铁硫化物附着于矿物表面, 体系磁化率降低. SRB—磁性铁氧化物交互作用过程中, 磁化率变化受硫酸盐、矿物种类和性质的共同制约.
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