【作者】 俞花美；

【导师】 黄占斌；

【作者基本信息】 中国矿业大学（北京） ， 环境工程， 2014， 博士

【摘要】 论文以甘蔗渣和木薯渣为前驱物在不同温度下制备生物质炭，对其进行性质表征，研究了其对典型农业土壤中阿特拉津吸附性能及影响因素，探讨了生物质炭的结构特征与吸附机理间的定量关系。结果表明：随着裂解温度的升高，甘蔗渣和木薯渣的裂解程度增加，生物质炭C/H比逐渐增大，芳香性程度逐渐增加，生物质炭的阳离子交换量不断升高。生物质炭不仅可提高3种供试土壤对阿特拉津的吸附能力，而且还可以改变土壤对阿特拉津的吸附等温线非线性程度，具有明显的解吸迟滞效应。阿特拉津在生物质炭土壤中的吸附过程是自发进行，且表现为吸热反应。升高温度可促进吸附反应过程的进行，吸附作用力主要有氢键、离子和配位基交换、偶极间力和化学键。更多还原

【Abstract】 In this study, the preparation and property characterization of biochars under different tempertures(350℃-750℃) with bagasse and manioc waste (bagasse marked by GZ350-GZ750; cassava wastemarked by MS350-MS750) as precursors was demonstrated. The thesis also studied its adsorptionproperties and influencing factors in soils and discussed the quantitative relationship between thestructure characteristics of biochars and the adsorption mechanism. The result shows that:(1) Withpyrolysis temperature going up, pyrolysis extent of bagasse and manioc waste is enhancing, the C/Hof biochars is increasing gradually and the aromaticity is also enhancing. Additionally, cationexchange capacity (CEC) of biochars is going up constantly.(2) Biochars amendment not onlyenhances the sorption affinity for atrazine in soils but also changes the adsorption isothermnonlinearity. And negative hysteresis effects are also observed during desorption process.(3)Atrazine’s adsorption in all soil with biochars is a spontaneous and endothermic reaction, and thehigher temperature is favor of adsorption reaction. Adsorption forces includes hydrogen bonding, theexchange between ionic and ligand, the dipole force and chemical bond.更多还原