模拟酸雨条件下垃圾填埋的重金属地球化学迁移模型——以徐州为例  

Geochemical Migration Model of Heavy Metals in the Bioreator Landfill Site under Simulated Acid Rain Condition

作　　者：刘会虎[1] 桑树勋[1] 曹丽文[1] 周效志[1] 

机构地区：[1]中国矿业大学资源与地球科学学院,徐州221008

出　　处：《地球与环境》2009年第2期118-125,共8页Earth and Environment

基　　金：国家自然科学基金项目(40372069);教育部新世纪人才支持计划项项目(NCET-05-0479);江苏省高校中青年学术带头人基金项目国家科技支撑计划项目(2006BAC09B04);国家自然科学基金项目(40773072)

摘　　要：为研究酸雨沉降条件下垃圾中重金属迁移过程,以重金属浓度变化为基础,建立了生物反应器填埋场重金属浸出和淋出的地球化学迁移过程模型和地球化学迁移的数学预测模型。研究表明,重金属的浸出顺序为As、Ni、Cr、Co、Cd、Mn、Cu、Zn、Sn、Hg、Pb、Fe,淋出顺序为Mn、Co、Ni、Cr、Cu、Cd、As、Fe、Zn、Hg、Pb、Sn;对生活垃圾重金属浸出所建立的数学模型大多为指数函数、幂函数、二次函数,对模拟酸雨条件下的生物反应器填埋场重金属的淋出建立的数学模型大多为二次函数、幂函数,数学模型的相关系数在0.9以上,模型拟合效果较为理想;通过引进重金属元素释放系数建立了生物反应器填埋场重金属淋出累积总量的模型,修正后的模型的计算结果和实测值的误差在千分之一以内,可用于预测填埋场内重金属溶出总量。The geochemical migration model and mathematical model of heavy metals lixiviated and leached from the bioreactor landfill site were established to study the migration process of heavy metals in the bioreactor landfill site under simulated acid condition. The results showed that the lixiviating order of heavy metals is As, Ni, Cr, Co, Cd, Mn, Cu, Zn, Sn, Hg, Pb, Fe, the leaching order of heavy metals is Mn, Co, Ni, Cr, Cu, Cd, As, Fe, Zn, Hg, Pb, and Sn. The mathematical models of heavy metal lixiviating established involve mainly exponential function, power function, quadratic function, the mathematical models of heavy metal leaching established involve mainly quadratic function and power function, and the correlative coefficients of the mathematical models are above 0.9, which shows a comparatively ideal fitting effect. The cumulative total amount models of heavy metal leaching in the bioreactor landfill site were established by introducing the release coefficient of heavy metals. The error rate of model modified is within millesimal when it is used for calculation after modification, the model modified can be used to predict the total amount of heavy metal leaching in the bioreaetor landfill site.

关 键 词：生物反应器填埋场 重金属地球化学迁移 过程模型 数学模型 

分 类 号：P595[天文地球—地球化学] X705[天文地球—地质学]