Environmental concern on biochar: capture, then what?

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• 作者：Chunjiang An ; Gordon Huang
• 关键词：Biochar ; Soil ; Pollutants ; Climate change ; Risk ; Adaptation
• 刊名：Environmental Earth Sciences
• 出版年：2015
• 出版时间：December 2015
• 年：2015
• 卷：74
• 期：12
• 页码：7861-7863
• 全文大小：159 KB
• 参考文献：Almaroai Y, Usman AA, Ahmad M, Moon D, Cho JS, Joo Y, Jeon C, Lee S, Ok Y (2014) Effects of biochar, cow bone, and eggshell on Pb availability to maize in contaminated soil irrigated with saline water. Environ Earth Sci 71:1289鈥?296CrossRef
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  Kwon S, Pignatello JJ (2005) Effect of natural organic substances on the surface and adsorptive properties of environmental black carbon (char): pseudo pore blockage by model lipid components and its implications for N2-probed surface properties of natural sorbents. Environ Sci Technol 39:7932鈥?939CrossRef
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  Melillo JM, Steudler PA, Aber JD, Newkirk K, Lux H, Bowles FP, Catricala C, Magill A, Ahrens T, Morrisseau S (2002) Soil warming and carbon-cycle feedbacks to the climate system. Science 298:2173鈥?176CrossRef
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  Zimmerman AR, Gao B, Ahn MY (2011) Positive and negative carbon mineralization priming effects among a variety of biochar-amended soils. Soil Biol Biochem 43:1169鈥?179CrossRef
  
• 作者单位：Chunjiang An (1)
  Gordon Huang (1)
  
  1. Institute for Energy, Environment and Sustainable Communities, University of Regina, Regina, SK, S4S 0A2, Canada
  
• 刊物类别：Earth and Environmental Science
• 刊物主题：None Assigned
• 出版者：Springer Berlin Heidelberg
• ISSN：1866-6299

文摘

Biochar is receiving increasing attention as soil amendment. A booming expansion is expected to sharply increase the amount of biochar usage around the world. When we are on the way to change the environment by adding biochar into soil, it is worthwhile to evaluate comprehensively environmental considerations before making excessive use of it in soil. Biochar in soil can effectively retain a wide range of toxic substances through sorption and other physicochemical reactions. Nevertheless, this process usually includes decreased mobility rather than significant chemical reduction of target compounds. Biochar tends to become the sink of soil pollutants. The changing soil environment can result in the release of toxic compounds from biochar in the long term. Biochar can be deactivated by clogged pores or decreasing sorption capacity. Once biochar is mixed with soils, it is difficult to separate them again. It is important to make a deliberate decision before action. Keywords Biochar Soil Pollutants Climate change Risk Adaptation