Plant Biology and Soil Science Department, University of Vigo, Ourense Campus, 32004 Ourense, Spain.
Environ Pollut. 2010 Dec;158(12):3634-41. doi: 10.1016/j.envpol.2010.08.005. Epub 2010 Sep 15.
The main purpose of this work was to identify the role of soil humic acids (HAs) in controlling the behavior of Cu(II) in vineyard soils by exploring the relationship between the chemical and binding properties of HA fractions and those of soil as a whole. The study was conducted on soils with a sandy loam texture, pH 4.3-5.0, a carbon content of 12.4-41.0gkg(-1) and Cu concentrations from 11 to 666mgkg(-1). The metal complexing capacity of HA extracts obtained from the soils ranged from 0.69 to 1.02molkg(-1), and the stability constants for the metal ion-HA complexes formed, logK, from 5.07 to 5.36. Organic matter-quality related characteristics had little influence on Cu adsorption in acid soils, especially if compared with pH, the degree of Cu saturation and the amount of soil organic matter.
这项工作的主要目的是通过研究 HA 各组分的化学性质和结合特性与土壤整体之间的关系，来确定土壤腐殖酸（HA）在控制葡萄园土壤中 Cu(II)行为方面的作用。该研究在质地为砂壤土、pH 值为 4.3-5.0、碳含量为 12.4-41.0gkg(-1)且 Cu 浓度为 11-666mgkg(-1)的土壤上进行。从土壤中提取的 HA 提取物的金属络合能力为 0.69-1.02molkg(-1)，形成的金属离子-HA 配合物的稳定常数 logK 为 5.07-5.36。与 pH 值、Cu 饱和度和土壤有机质含量相比，与有机质质量相关的特性对酸性土壤中 Cu 的吸附影响甚微。
