Faculté des Sciences, Institut de Chimie Moléculaire de Reims (ICMR), UMR CNRS 7312, Université de Reims Champagne-Ardenne, B.P. 1039, 51687, Reims Cedex 2, France.
Environ Sci Pollut Res Int. 2014 Mar;21(6):4473-81. doi: 10.1007/s11356-013-2408-0. Epub 2013 Dec 12.
A soil column leaching study was conducted on an acidic soil in order to assess the impact of lime-stabilized biosolid on the mobility of metallic pollutants (Cu, Ni, Pb and Zn). Column leaching experiments were conducted by injecting successively CaCl2, oxalic acid and ethylenediaminetetraacetic acid (EDTA) solutions through soil and biosolid-amended soil columns. The comparison of leaching curves showed that the transport of metals is mainly related to the dissolved organic carbon, pH and the nature of extractants. Metal mobility in the soil and biosolid-amended soils is higher with EDTA than with CaCl2 and oxalic acid extractions, indicating that metals are strongly bound to solid-phase components. The single application of lime-stabilized biosolid at a rate ranging from 15 to 30 t/ha tends to decrease the mobility of metals, while repeated applications (2 × 15 t/ha) increase metal leaching from soil. This result highlights the importance of monitoring the movement and concentrations of metals, especially in acid and sandy soils with shallow and smaller water bodies.
进行了一项酸性土壤的柱状淋滤研究，以评估石灰稳定生物固体对金属污染物（Cu、Ni、Pb 和 Zn）迁移性的影响。通过向土壤和生物固体添加的土壤柱中连续注入氯化钙、草酸和乙二胺四乙酸（EDTA）溶液，进行了柱状淋滤实验。淋滤曲线的比较表明，金属的迁移主要与溶解有机碳、pH 值和提取剂的性质有关。与氯化钙和草酸提取相比，EDTA 对土壤和生物固体添加土壤中金属的迁移性更高，表明金属与固相成分强烈结合。石灰稳定生物固体的单次应用率在 15 至 30 吨/公顷范围内，往往会降低金属的迁移性，而重复应用（2×15 吨/公顷）会增加土壤中金属的浸出。这一结果强调了监测金属的迁移和浓度的重要性，特别是在酸性和沙质土壤中，这些土壤的水体较浅且较小。
