作者
Deng Liu, Hongmei Wang, Hailiang Dong, Xuan Qiu, Xiuzhu Dong, Charles A Cravotta III
发表日期
2011/9/8
期刊
Chemical Geology
卷号
288
期号
1-2
页码范围
53-60
出版商
Elsevier
简介
To investigate the interaction between methanogens and iron-containing minerals in anoxic environments, we conducted batch culture experiments with Methanosarcina barkeri in a phosphate-buffered basal medium (PBBM) to bioreduce structural Fe(III) in goethite with hydrogen as the sole substrate. Fe(II) and methane concentrations were monitored over the course of the bioreduction experiments with wet chemistry and gas chromatography, respectively. Subsequent mineralogical changes were characterized with X-ray diffraction (XRD) and scanning electron microscopy (SEM). In the presence of an electron shuttle anthraquinone-2,6-disulfonate (AQDS), 30% Fe(III) in goethite (weight basis) was reduced to Fe(II). In contrast, only 2% Fe(III) (weight basis) was bioreduced in the absence of AQDS. Most of the bioproduced Fe(II) was incorporated into secondary minerals including dufrénite and vivianite. Our data …
学术搜索中的文章
D Liu, H Wang, H Dong, X Qiu, X Dong, CA Cravotta III - Chemical Geology, 2011