Heavy metal enrichment characteristics of soil in manganese mining wetland by Philonotis thwaitesi

Abstract

Abstract Open pile manganese ore generates heavy metal pollution, which affects the surrounding environment, and it is necessary to monitor and remediate heavy metals in the mine area. In this study, we investigated the correlation between the accumulation of heavy metals in Philonotis thwaitesii and the content of heavy metals in soil by investigating the characteristics of heavy metals in Philonotis thwaitesii, Spirogyraand soil in the wetland around the manganese mine area in Zhaiying Town, Songtao County, Guizhou Province，in order to provide a scientific basis for ecological restoration and soil heavy metal pollution management in manganese mine area. The main results are as follows: the soil in the study area is moderately polluted by heavy metals and above; the correlation between heavy metals in Philonotis thwaitesiiis significant and influenced by soil; compared with Spirogyra, Philonotis thwaitesii has a stronger ability to enrich heavy metals; it is advantageous for remediation of moist polluted environment. In conclusion, Philonotis thwaitesii has a certain degree of enrichment capacity for heavy metals, and can be used for the comprehensive treatment of heavy metal pollution in manganese mining sites, as well as the bioremediation of polluted areas associated with it. And the content of Mn in Philonotis thwaitesii is up to 11799mg/kg, whether it can be used as a manganese hyperaccumulator, further research is needed.