[Preliminary assessment of the potential of biochar technology in mitigating the greenhouse effect in China].
The production of biochar by pyrolysis and its application to soil can sequester the CO2 which was absorbed by plants from atmosphere into soil, in addition it can also bring multiple benefits for agriculture production. On the basis of the available potential survey of the biomass residues from agriculture and forestry section, life cycle assessment was employed to quantify the potential of biochar technology in mitigation of greenhouse gases in our country. The results showed: In China, the amount of available biomass resource was 6.04 x 10(8) t every year and its net greenhouse effect potential was 5.32 x 10(8) t CO(2e) (CO(2e): CO2 equivalent), which was equivalent to 0.88 t CO(2e) for every ton biomass. The greatest of contributor to the total potential was plant carbon sequestration in soil as the form of biochar which accounts for 73.94%, followed by production of renewable energy and its percentage was 23.85%. In summary, production of biochar from agriculture and forestry biomass residues had a significant potential for our country to struggle with the pressure of greenhouse gas emission.
College of Environmental Science and Engineering, Ocean University of China, Qingdao 266100, China. yifeng501@sina.com
Zhi-Xiang
ZX
Jiang
Hao
H
Zheng
Feng-Min
FM
Li
Zhen-Yu
ZY
Wang
D000327:Adsorption; D000393:Air Pollutants / Q000032:analysis / Q000302:isolation & purification*; D000397:Air Pollution / Q000517:prevention & control*; D002245:Carbon Dioxide / Q000032:analysis / Q000302:isolation & purification*; D002606:Charcoal / Q000138:chemical synthesis / Q000737:chemistry*; D002681:China; D018556:Crops, Agricultural / Q000737:chemistry; D017752:Greenhouse Effect; D018547:Plant Stems / Q000737:chemistry; D012037:Refuse Disposal
D000393:Air Pollutants; C540010:biochar; D002245:Carbon Dioxide; D002606:Charcoal