Transformation mechanism of nutrient elements in the process of biochar preparation for returning biochar to soil

Shuangshuang Tian; Zhongxin Tan; Alfreda Kasiuliene.; Ping Ai

doi:10.1016/j.cjche.2016.09.009

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Transformation mechanism of nutrient elements in the process of biochar preparation for returning biochar to soil

Biotechnology and Bioengineering | Updated：2026-01-06

- Transformation mechanism of nutrient elements in the process of biochar preparation for returning biochar to soil
- Chinese Journal of Chemical Engineering Vol. 25, Issue 4, Pages: 477-486(2017)
- Affiliations：
  
  1. College of Resources and Environment, Huazhong Agricultural University,Wuhan,China,430070
  2. Waste Science and Technology, Department of Civil, Environmental and Natural Resources Engineering, Luleå University of Technology,- Luleå,SE,Sweden,97187
  3. College of Engineering, Huazhong Agricultural University,Wuhan,China,430070
- Author bio：
- Funds：
- DOI：10.1016/j.cjche.2016.09.009
  CLC：
- Published：2017
- Accepted：
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Shuangshuang Tian, Zhongxin Tan, Alfreda Kasiuliene., Ping Ai. Transformation mechanism of nutrient elements in the process of biochar preparation for returning biochar to soil[J]. , 2017, 25(4): 477-486.
DOI：

Shuangshuang Tian, Zhongxin Tan, Alfreda Kasiuliene., Ping Ai. Transformation mechanism of nutrient elements in the process of biochar preparation for returning biochar to soil[J]. , 2017, 25(4): 477-486. DOI： 10.1016/j.cjche.2016.09.009.

摘要

Abstract

Returning biochar to soil is a heavily researched topic because biochar functions well for soil improvement.There is a significant loss of nutrients

which occurs during biochar preparation before biochar is returned to soil

thereby seriously undermining biochar's efficacy.Therefore

the transformation mechanisms of biochar pH

mass

nutrients and metals during pyrolysis under different atmospheres and temperatures were studied such that the best method for biochar preparation could be developed.Several conclusions can be reached:(1) a CO

atmosphere is better than a N

atmosphere for biochar preparation

although preparation in a CO

atmosphere is not a common practice for biochar producers;(2)350℃ is the best temperature for biochar preparation because the amount of nutrient loss is notably low based on the premise of straw transferred into biochar;and (3) transforming mechanisms of pH

P and K are also involved in the biochar preparation process.

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