摘要
从分析降解试验结果出发,利用示踪动力学原理和隔室模型,导出了确定土壤烃类结合态数量x_(2(t))的数学式,x_(2(t))=(k_2x_1(0))/(α-β)(e^(-βi)-e^(-αi).烷烃、芳烃和BaP结合态的最大值分别为182ppm,7.8ppm和1.5ppb.烷烃结合态达最大值时所需时间是20d,芳烃和Bap均为30d,其降解速率(d^(-1))分别为0.01913、0.01516和0.004575.烷烃结合态占其总残留量的10 ％,芳烃和Bap则占各自残留量的5％.常规法计算的残留率比示踪动力学法偏低5—10％.
The tracer technique and compartmental model were applied to study the relationship between extractable and unextractable fractions of petroleum residuals in soil. The unextractable fraction could be calculated using following equation:
The maximum concentrations of the unextractable fractions of alkane, aromatic hydrocarbon and BaP were found to be 182ppm(10% of the total), 7.8ppm(5 % of the total) and 1.5ppb (5 % of the total), and the maximum were reached in 20, 30 and 30 days respectively. The degradation rate constants of the three chemicals were 0.01913, 0.01516 and 0.004575 (day-1), respectively.
出处
《环境科学学报》
CAS
CSSCI
CSCD
北大核心
1990年第3期263-271,共9页
Acta Scientiae Circumstantiae
