Journal
SCIENCE OF THE TOTAL ENVIRONMENT
Volume 562, Issue -, Pages 732-739Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.scitotenv.2016.04.079
Keywords
Mycoextraction; Immobilization; Biochar; Activated carbon; Heavy metals
Categories
Funding
- Science and Technology Program for Public Wellbeing of Chengdu [s-HM01-00163-SF]
- Science and Technology Innovation Seedling Project of Sichuan Province [2015RZ0019]
- Science and Technology Support Program of Sichuan Province [2016NZ0050]
- National Science and Technology Supporting Program [2015BAD05B01-5]
- NSFC [J1103518]
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To develop an eco-friendly and efficient route to remediate soil highly polluted with heavy metals, the idea of mycoextraction combined with metal immobilization by carbonaceous sorbents (biochar and activated carbon) was investigated in this study. Results showed that the application of carbonaceous amendments decreased acid soluble Cd and Cu by 5.13-14.06% and 26.86-49.58%, respectively, whereas the reducible and oxidizable fractions increased significantly as the amount of carbonaceous amendments added increased. The biological activities (microbial biomass, soil enzyme activities) for treatments with carbonaceous sorbents were higher than those of samples without carbonaceous amendments. Clitocybemaxima (C. maxima) simultaneously increased soil enzyme activities and the total number of microbes. Biochar and activated carbon both showed a positive effect on C. maxima growth and metal accumulation. The mycoextraction efficiency of Cd and Cu in treatments with carbonaceous amendments enhanced by 25.64-153.85% and 15.18-107.22%, respectively, in response to that in non-treated soil, which showed positive correlation to the augment of biochar and activated carbon in soil. Therefore, this work suggested the effectiveness of mycoextraction by C. maxima combined the application of biochar and activated carbon in immobilising heavy metal in contaminated soil. (C) 2016 Published by Elsevier B. V.
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