期刊
ENVIRONMENTAL GEOCHEMISTRY AND HEALTH
卷 37, 期 6, 页码 931-942出版社
SPRINGER
DOI: 10.1007/s10653-015-9694-z
关键词
Black carbon; Charcoal; Soil remediation; Nanoparticle; Slow pyrolysis; Synchrotron
类别
资金
- Basic Science Research Program, through the National Research Foundation of Korea (NRF) - Ministry of Education, Science and Technology [2012R1A1B3001409]
- Research Program for Agricultural Science and Technology Development, National Academy of Agricultural Science, RDA, Korea [PJ009219042014]
- National Research Foundation of Korea [2012R1A1B3001409] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
- Rural Development Administration (RDA), Republic of Korea [PJ009219042014] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
High concentration of toxic metals in military shooting range soils poses a significant environmental concern due to the potential release of metals, such as Pb, Cu, and Sb, and hence requires remediation. The current study examined the effectiveness of buffalo weed (Ambrosia trifida L.) biomass and its derived biochars at pyrolytic temperatures of 300 and 700 A degrees C, natural iron oxides (NRE), gibbsite, and silver nanoparticles on metal immobilization together with soil quality after 1-year soil incubation. Destructive (e.g., chemical extractions) and non-destructive (e.g., molecular spectroscopy) methods were used to investigate the immobilization efficacy of each amendment on Pb, Cu, and Sb, and to explore the possible immobilization mechanisms. The highest immobilization efficacy was observed with biochar produced at 300 A degrees C, showing the maximum decreases of bioavailability by 94 and 70 % for Pb and Cu, respectively, which were attributed to the abundance of functional groups in the biochar. Biochar significantly increased the soil pH, cation exchange capacity, and P contents. Indeed, the scanning electron microscopic elemental dot mapping and X-ray absorption fine structure spectroscopic (EXAFS) studies revealed associations of Pb with P (i.e., the formation of stable chloropyromorphite [Pb-5(PO4)(3)Cl]) in the biomass- or biochar-amended soils. However, no amendment was effective on Sb immobilization.
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