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The potential of Manihot esculenta Crantz (cassava) to phytoextract Hg and Au from Hg- and Au-containing biosolids and mine tailings was successfully demonstrated for the first time. Removal of Hg by a hyperaccumulating plant species offers new options to clean up Hg-contaminated sites and at the same time harvest trace amounts of Au. Pre-rooted cassava cuttings with 5–7 nodes were grown in different...
Biosolids stockpiles from sewage treatment plants are a valuable source of organic matter which could be utilized to improve the nutritional status and physical properties of Au mine tailings and support the growth of vegetation planted in the tailings. However, biosolids often contain elevated concentrations of heavy metals including Hg while Au mine tailings would usually contain residual Au. Therefore,...
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