数字农科院2.0

The Solid-Solution Distribution Of Copper A.dded To Soils: Influencing F actors And Models

文献类型： 外文期刊

作者： Zhang, XQ; Li, JM; Wei, DP; Li, B; Ma, YB

作者机构：

关键词： Copper; Prediction models; Risk assessment; Soil solution; Speciation

期刊名称： JOURNAL OF SOILS AND SEDIMENTS

ISSN： 1439-0108

年卷期： 2018 年 18 卷 9 期

页码：

收录情况： JCR（2021版）

摘要： A series of empirical and mechanistic geochemical models were developed to describe the solid-solution partitioning of copper (Cu) in typical fresh spiked Chinese soils. The influence of soil properties on Cu partitioning was assessed in a wide range of soils using multiple regression analysis. Geochemical models (WHAM VI and Visual MINTEQ) and simulation analyses in combination with experimental data (i.e., the bulk of soil properties and Cu contents) were performed in order to provide additional insight into the mechanisms controlling the Cu partitioning. Calculation of soluble Cu contents based on the two models was then simplified and optimized by adjusting input variables, and the calibrated outputs were used to produce reasonable predictions of soluble metal concentrations. The results of the multiple regression analyses presented in this paper show strong correlations between soluble Cu concentrations and soil Cu concentrations and properties, with adjusted coefficients of determination (R (adj) (2)) ranging between 0.84 and 0.91. Soil organic carbon (OC) content was an insignificant factor in most cases, but the active fraction of dissolved organic matter was important in improving model estimates. The best fit of root mean square error (RMSE) varied between 0.42 and 0.77 for the WHAM VI model and between 0.28 and 0.57 for the Visual MINTEQ model across all pH categories. The models presented in this paper are suitable for investigating and simulating Cu solid-solution partitioning in a wide range of Chinese soils.

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