CAJ | 학술논문

通过室内实验并应用现有的计算软件,反算出在文中所述的试验条件下,两种重金属离子(Cd2+, Pb2+)在有明粘土中的有效扩散系数和分配系数.在此基础之上,对假定的垃圾填埋场于其下卧含水层的水质影响进行了计算分析和评估.
통과실내실험병응용현유적계산연건,반산출재문중소술적시험조건하,량충중금속리자(Cd2+, Pb2+)재유명점토중적유효확산계수화분배계수.재차기출지상,대가정적랄급전매장우기하와함수층적수질영향진행료계산분석화평고.
An assessment of the potential use of a typical Japanese marine clay, Ariake clay, as a soil barrier material in landfills was presented. Two types of heavy metals, Cd2+ and Pb2+, were selected as key contaminants for laboratory diffusion test. Using commercially available contaminant transport software, the effective diffusion coefficients and partition coefficients of both Cd2+ and Pb2+ were back-calculated from the results of the diffusion test. The effective diffusion coefficients were found to be consistent with previously published values, indicating that the presented testing method was acceptable. The high retained percentage of Cd2+ and Pb2+ in the Ariake clay specimen indicated that the Ariake clay might be used as a good barrier material in landfills. With the derived effective diffusion coefficients and partition coefficients, the influences of Cd2+ and Pb2+ on the underlying aquifer in an assumed landfill were numerically assessed using the 1D diffusion transport theory.