Immobilization of lead in contaminated firing range soil using biochar

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• 作者：Deok Hyun Moon (1)
  Jae-Woo Park (2)
  Yoon-Young Chang (3)
  Yong Sik Ok (4)
  Sang Soo Lee (4)
  Mahtab Ahmad (4)
  Agamemnon Koutsospyros (5)
  Jeong-Hun Park (6)
  Kitae Baek (7)
  
• 关键词：Pb ; Immobilization ; Biochar ; Soybean ; Firing range soil
• 刊名：Environmental Science and Pollution Research
• 出版年：2013
• 出版时间：December 2013
• 年：2013
• 卷：20
• 期：12
• 页码：8464-8471
• 全文大小：
• 作者单位：Deok Hyun Moon (1)
  Jae-Woo Park (2)
  Yoon-Young Chang (3)
  Yong Sik Ok (4)
  Sang Soo Lee (4)
  Mahtab Ahmad (4)
  Agamemnon Koutsospyros (5)
  Jeong-Hun Park (6)
  Kitae Baek (7)
  
  1. Department of Environmental Engineering, Chosun University, Gwangju, 501-759, Republic of Korea
  2. Department of Civil and Environmental Engineering, Hanyang University, Seoul, 133-791, Republic of Korea
  3. Department of Environmental Engineering, Kwangwoon University, Seoul, 139-701, Republic of Korea
  4. Department of Biological Environment, Kangwon National University, Chuncheon, 200-701, Republic of Korea
  5. Mechanical, Civil and Environmental Engineering, University of New Haven, West Haven, CT, 06516, USA
  6. Department of Environmental Engineering, Chonnam National University, Gwangju, 500-757, Republic of Korea
  7. Department of Environmental Engineering, Chonbuk National University, Jeonju, 570-752, Republic of Korea
  
• ISSN：1614-7499

文摘

Soybean stover-derived biochar was used to immobilize lead (Pb) in military firing range soil at a mass application rate of 0 to 20?wt.% and a curing period of 7?days. The toxicity characteristic leaching procedure (TCLP) was performed to evaluate the effectiveness of the treatment. The mechanism responsible for Pb immobilization in military firing range soil was evaluated by scanning electron microscopy-energy dispersive x-ray spectroscopy (SEM-EDX) and x-ray absorption fine structure (XAFS) spectroscopy analyses. The treatment results showed that TCLP Pb leachability decreased with increasing biochar content. A reduction of over 90?% in Pb leachability was achieved upon treatment with 20?wt.% soybean stover-derived biochar. SEM-EDX, elemental dot mapping and XAFS results in conjunction with TCLP leachability revealed that effective Pb immobilization was probably associated with the pozzolanic reaction products, chloropyromorphite and Pb-phosphate. The results of this study demonstrated that soybean stover-derived biochar was effective in immobilizing Pb in contaminated firing range soil.