生物利用度
环境化学
环境科学
重金属
土壤水分
土工试验
化学
土壤科学
生物
生物信息学
作者
Jiawen Zhang,Xiaonan Wang,Jihong Li,Jingjing Luo,Xusheng Wang,Shunhao Ai,Hongguang Cheng,Zhengtao Liu
标识
DOI:10.1016/j.jhazmat.2023.133327
摘要
The real biological effect is not generated by the total content of heavy metals (HMs), but rather by bioavailable content. A new bioavailability-based ecological risk assessment (BA-based ERA) framework was developed for deriving bioavailability-based soil quality criteria (BA-based SQC) and accurately assessing the ecological risk of soil HMs at a multi-regional scale in this study. Through the random forest (RF) models and BA-based ERA framework, the 217 BA-based SQC for HMs in 31 Chinese provinces were derived and the BA-based ERA was comprehensively assessed. This study found that bioavailable HMs extraction methods (BHEMs) and total HMs content play the predominant role in affecting HMs (As, Cd, Cr, Cu, Ni, Pb, and Zn) bioavailability by explaining 27.55-56.11% and 9.20-62.09% of the variation, respectively. The RF model had accurate and stable prediction ability for the bioavailability of soil HMs with the mean R
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