Influence of pyrolysis temperature on biochar stability and leaching properties of nutrients contained in biochar

LU Tao; YUAN Haoran; WANG Yazhuo; HUHETAOLI; CHEN Yong

doi:10.11949/j.issn.0438-1157.20150253

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Influence of pyrolysis temperature on biochar stability and leaching properties of nutrients contained in biochar

更新时间：2025-11-26

- Influence of pyrolysis temperature on biochar stability and leaching properties of nutrients contained in biochar
- CIESC Journal Vol. 66, Issue 7, Pages: 2664-2669(2015)
- 作者机构：
  
  1. 中国科学院广州能源研究所,广东,广州,510640
  2. 中国科学院可再生能源重点实验室,广东,广州,510640
  3. 中国科学院大学,北京,100049
- 作者简介：
- 基金信息：
- DOI：10.11949/j.issn.0438-1157.20150253
  CLC： 705
- Online First：05 July 2015，
  
  Published：05 July 2015
- 稿件说明：
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LU Tao, YUAN Haoran, WANG Yazhuo, et al. Influence of pyrolysis temperature on biochar stability and leaching properties of nutrients contained in biochar[J]. CIESC Journal, 2015, 66(7): 2664-2669.
DOI：

LU Tao, YUAN Haoran, WANG Yazhuo, et al. Influence of pyrolysis temperature on biochar stability and leaching properties of nutrients contained in biochar[J]. CIESC Journal, 2015, 66(7): 2664-2669. DOI： 10.11949/j.issn.0438-1157.20150253.

摘要

以市政污泥为原料

在300、500、700 ℃ 条件下热解制备得到污泥生物炭。采用碱液吸收法测定生物炭在培养环境下的CO2释放速率以表征其降解速率

并采用预测模型计算得到生物炭的半衰期。以去离子水为浸提剂考察了生物炭中可溶性养分含量及其淋溶特性。结果表明:在300~700℃范围内

较高温度下制备的生物炭降解缓慢

稳定性更强

可在自然环境中长期存在

具有更好的固碳效果;较低温度下制备的生物炭中水溶性氮、水溶性钾含量更高

但水溶性磷含量更低;生物炭中养分的淋溶效果与其可溶性养分含量一致

较低温度下制备的生物炭的淋溶液中水溶性氮、水溶性钾含量较高

水溶性磷含量较低。

Abstract

The biochar was produced from sewage sludge by pyrolysis at 300

500 and 700 ℃. In this study the biochar degradation rate represented by CO2 release rate through alkali absorption method in microbial incubation was investigated and the half-life using a recommended prediction method was predicted. In addition

deionized water was used to investigate the content and leaching properties of the water-soluble nutrients contained in biochar. During the temperature range of 300—700℃

the biochar produced at higher temperature was degraded slowly and had longer half-life

which may exist in soil for a longer time span and then perform a better effect on carbon sequestration than that produced at lower temperature. However

biochar produced at lower temperature contained more water-soluble N and K but less water-soluble P

which was agreed with the concentration of leaching nutrients. The leaching water of biochar produced at lower temperature also contained more much water-soluble N and K but less water-soluble P.

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