湖北农业科学 ›› 2018, Vol. 57 ›› Issue (20): 35-39.doi: 10.14088/j.cnki.issn0439-8114.2018.20.009

• 资源·环境 • 上一篇    下一篇

生物炭吸附填埋场温室气体试验

江超1,2, 赵仲辉1,2, 刘秉岳3   

  1. 1.河海大学岩土工程及堤坝工程教育部重点实验室,南京 210098;
    2.江苏省岩土工程技术工程研究中心,南京 210098;
    3.九江职业技术学院,江西 九江 332007
  • 收稿日期:2018-07-16 发布日期:2018-10-25
  • 作者简介:江 超(1992-),男,安徽池州人,硕士,主要从事环境岩土相关研究,(电话)13655196074(电子信箱)13655196074@163.com。
  • 基金资助:
    中央高校基本科研业务费项目(2017B00914)

Laboratory Study on Adsorption Capacity of Greenhouse Gas in Biochar Cover

JIANG Chao1,2, ZHAO Zhong-hui1,2, LIU Bing-yue3   

  1. 1.Key Laboratory of Ministry of Education for Geotechnical Engineering and Dam Engineering,Hohai University,Nanjing 210098,China;
    2.Jiangsu Research Center for Geotechnical Engineering Technology,Nanjing 210098,China;
    3.Jiujiang Vocational and Technical College,Jiujiang 332007,Jiangxi,China
  • Received:2018-07-16 Published:2018-10-25

摘要: 为了解决老旧填埋场中填埋气无组织释放带来的环境问题,提出的以生物炭为介质的生物覆盖层,除了能提高CH4氧化能力之外,还可以吸附土壤中以CH4和CO2为主的温室气体。通过批量吸附试验发现,添加生物炭能提高土壤CH4和CO2吸附能力,对比原土生物炭掺量为20%的改性土其最大气体吸附量更是提高了一个量级;生物炭改性土的CH4和CO2气体吸附均符合准二级吸附动力学模型,说明这一吸附过程是由表面吸附和颗粒内扩散联合控制;通过Langmuir等温吸附模型对CH4和CO2在改性土中吸附平衡数据非线性拟合,结果理想,1 kg 20%炭改性土最大能吸附0.012 mol CH4和0.043 mol CO2

关键词: 粉土, 生物炭, 甲烷, 二氧化碳, 批量试验, 动力学

Abstract: To solve the environmental problems caused by the unorganized release of landfill gas from old landfills,a biological blanket using biochar as a medium was proposed. In addition to be able to improve the oxidation capacity of CH4,it could also absorb greenhouse gas which were dominated by CH4 and CO2. By conducting a batch of adsorption experiments,it was found that the biochar could increase the adsorption capacity of soil CH4 and CO2,and the maximal value of gas adsorption of the modified soil with 20% biological carbon was increased by one order of magnitude; The adsorptions of CH4 and CO2 in the biochar modified soil were conformed to the pseudo-second-order equation,indicating that the adsorption process applied union control through surface adsorption and intra-particle diffusion. The equilibrium adsorption data of CH4 and CO2 in the modified soil was analyzed with the Langmuir isothermal adsorption model. The result of nonlinear fitting was ideal. The 1 kg modified soil with 20% biological carbon could adsorb 0.012 mol CH4 and 0.043 mol CO2 at maximum.

Key words: silt, biochar, methane, carbon dioxide, batch test, kinetics

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