Spatial distribution of vanadium and microbial community responses in surface soil of Panzhihua mining and smelting area, China

Microbial Community Responses to Vanadium Distributions in Mining Geological Environments and Bioremediation Assessment

“…The vanadium content in surface soil samples from MP, CO, SM, and TR areas varied significantly (Figure a), 1.26, 1.59, 13.8, and 1.63 times that of the soil background value of vanadium in China (82 mg/kg, p < 0.05). The highest vanadium concentration was observed from SM‐SL0, confirming previous findings by Cao et al (). Other metals were also measured and higher contents of Zn and Cr were observed (Table S2 SI); all Zn results from the four sites were above the soil background value (74.2 mg/kg, p < 0.01) recommended for China (Li et al, ).…”

“…Zoogloea and Trichococcus are capable of reducing Cr (VI) to Cr (III) (Liu et al, ; Solisio et al, ). These members of the microbial community accumulated in our study and were also found in the vanadium‐contaminated environment (Cao et al, ). They potentially participate in V(V) reduction because vanadium is a redox‐sensitive metal similar to selenium and chromium (Jiang et al, ).…”

“…Although bioavailability of vanadium in solid matrices had been previously observed in Panzhihua (Cao et al, ), local mining activities have increased the bioavailability of vanadium compared to that of vanadium‐bearing titanomagnetite. Acid‐soluble fraction increased in all surface soil and in TR‐TL0; this fraction is the most active and readily dissolves during rain events (Jayawardana et al, ; Wang et al, ).…”

“…Genomic DNA from all field samples and incubated samples was extracted using the FastDNA SPIN Kit for Soil (Oiagen, CA, United States) according to manufacturer's instructions. The V4‐V5 hypervariable regions of total bacterial 16S rRNA genes were amplified from solid samples (Cao et al, ) and the V3‐V4 hypervariable regions of total bacterial 16S rRNA genes were amplified from aqueous samples (Liu et al, ). DNA sequencing was performed on the Illumina MiSeq platform by Shanghai Majorbio Technology (Shanghai, China).…”

“…Accumulated vanadium in such matrices can substantially alter microbial communities (Yang, Huang, et al, ). Decreased microbial richness and diversity in soil and reduced soil basal respiration have been found to correlate with vanadium pollution (Cao et al, ; Xiao et al, ). Nevertheless, characteristics of microbial communities with vanadium present in other environmental matrices, such as water and sediment, have rarely been investigated.…”