Bioleaching of trace elements and rare earth elements from coal fly ash
Stephen Park
Yanna Liang
摘要：Coal fly ash originated from coal combustion has high concentrations of metals.If suitable leaching techniques are identified,then coal fly ash could serve as a useful source of valuable minerals including rare earth elements (REEs).In this study,three microbial strains,Candida bombicola,Phanerochaete chrysosporium and Cryptococcus curvatus were tested on their performance of leaching trace elements and REEs from fly ash.Through comparing mineral loss and leaching efficiencies resulting from indirect leaching or use of the culture supernatant,C.bombicola was identified to be the best leading to the highest mineral loss and extracting efficiencies of trace elements and REEs among the three strains.The highest mineral loss observed from using the supernatant of this yeast strain was 59.7％.Among all trace elements,As and Mo had the highest leaching efficiency of 80.9％ and 79.5％,respectively.The same leaching test led to 67.7％ of Yb and 64.6％ of Er dissolved from the ash.This study,thus,demonstrated that bioleaching is feasible for leaching metals out of fly ash.The C.bombicola strain deserves further investigation due to its robust actions on metal leaching.
机标关键词：
资助基金：We gratefully acknowledge support from the Department of Energy of the United States under Award (No.DE-FE0024126)
论文发表日期：2019-01-01
在线出版日期：2025-08-15（本平台首次上网日期，不代表文献的发表时间）
页数：10( 74-83 )
英文信息