Socías-Viciana M M, Fernández-Pérez M, Villafranca-Sánchez M, González-Pradas E, Flores-Céspedes F
Departamento de Química Inorgánica, Universidad de Almería, Almería 04120, Spain.
J Agric Food Chem. 1999 Mar;47(3):1236-41. doi: 10.1021/jf980799m.
The sorption and leaching of atrazine and MCPA (0.02 M CaCl(2) aqueous solution at 25 degrees C) by a calcareous soil from Southeastern Spain, after organic carbon (OC) amendment with a commercial peat (from 0.18% to 4.61% OC), were studied in batch and soil column experiments. Adsorption capacity (K(f)) values, obtained by fitting the experimental data to the Freundlich equation, ranged from 0.24 mg kg(-)(1) for MCPA sorption on the original soil to 5.47 mg kg(-)(1) for atrazine sorption on the peat-amended soil containing 4.61% OC. The breakthrough curves obtained from the step-function soil column experiments indicated that the amount of herbicide adsorbed ranged from 17.5 mg kg(-)(1) for MCPA in the original soil to 331 mg kg(-)(1) for atrazine in the peat-amended soil containing 1.67% OC. The results obtained from the pulse experiments indicate that the mobility of MCPA is much greater than that corresponding to atrazine.
在批量实验和土柱实验中，研究了西班牙东南部的一种石灰性土壤对阿特拉津和灭草灵（25℃下0.02M氯化钙水溶液）的吸附及淋溶情况，该土壤用一种商业泥炭进行了有机碳（OC）改良（有机碳含量从0.18%提高到4.61%）。通过将实验数据拟合到弗伦德利希方程得到的吸附容量（K(f)）值，对于灭草灵在原始土壤上的吸附，范围是0.24mg kg⁻¹，对于阿特拉津在有机碳含量为4.61%的泥炭改良土壤上的吸附，范围是5.47mg kg⁻¹。从阶跃函数土柱实验得到的穿透曲线表明，吸附的除草剂量，对于原始土壤中的灭草灵是17.5mg kg⁻¹，对于有机碳含量为1.67%的泥炭改良土壤中的阿特拉津是331mg kg⁻¹。脉冲实验结果表明，灭草灵的迁移性远大于阿特拉津。
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