Microbial vanadium (V) reduction in groundwater with different soils from vanadium ore mining areas

• Published in: Chemosphere (Oxford) 2018-07, Vol.202, p.272-279
• Main Authors: Hao, Liting, Zhang, Baogang, Feng, Chuanping, Zhang, Zhenya, Lei, Zhongfang, Shimizu, Kazuya, Cao, Xuelong, Liu, Hui, Liu, Huipeng
• Format: Article
• Language: English
• Subjects: Bioremediation; Groundwater; Microbial community; Vanadium (V); Vanadium ore mining areas
• ISSN: 0045-6535; 1879-1298
• DOI: 10.1016/j.chemosphere.2018.03.075

This work investigated the potential of vanadium (V) (V(V)) bioreduction by using soils sampled from four main kinds of vanadium ore mining areas, i.e. vanadium titanomagnetite, stone coal, petroleum associated minerals and uvanite as inocula. During a typical operation cycle of 60 h, the soils from vanadium titanomagnetite area and petroleum associated minerals area exhibited higher V(V) removal efficiencies, about 92.0 ± 2.0% and 91.0 ± 1.9% in comparison to 87.1 ± 1.9% and 69.0 ± 1.1% for the soils from uvanite and stone coal areas, respectively. Results from high-throughput 16 S rRNA gene pyrosequencing analysis reflect the accumulation of Bryobacter and Acidobacteriaceae with capabilities of V(V) reduction, accompanied with other functional species. This study is helpful to search new functional species for V(V) reduction and to develop in situ bioremediations of V(V) polluted groundwater. [Display omitted] •High efficacy V(V) removal was realized using soils from mining areas as inocula.•91–92% of V(V) removal was achieved with V-1 and P-1 soils after 60 h operation.•Functional microbial species were analyzed and associated with V(V) bioreduction.