Is the computed speciation of copper in a wide range of Chinese soils reliable?
文献类型: 外文期刊
第一作者: Li, Bo
作者: Li, Bo;Ma, Yibing;Yang, Junxing
作者机构:
关键词: Copper activity;soil pore water;distribution;model prediction
期刊名称:CHEMICAL SPECIATION AND BIOAVAILABILITY ( 影响因子:2.077; 五年影响因子:2.413 )
ISSN: 0954-2299
年卷期: 2017 年 29 卷 1 期
页码:
收录情况: SCI
摘要: Free Cu species in soils is a key issue to its bioavailability. However, predictive models for Cu speciation across a wide range of soils were still unavailable. In this study, Cu speciation in 34 contaminated soil samples were investigated via analytical technique and predictive models. The results showed that most of free Cu2+ was underestimated when using default log K-CuFA and 65% active fulvic acid as inputs in models of WHAM VI and NICA-Donnan. The best prediction was found when using either adjusted active fulvic acid from 10% to 125% for WHAM VI or from 15% to 65% for NICA-Donnan model with the RMSE < 0.32 and r(2) > 0.96. In contrast, NICA-Donnan demonstrated a slightly stronger binding for Cu than WHAM VI due to extra 26% of samples was underestimated. This work presents a comprehensive database of Cu speciation and an effective attempt of free Cu2+ prediction in a wide range of Chinese soils.
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