期刊
ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
卷 228, 期 -, 页码 -出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.ecoenv.2021.112999
关键词
Zn; Soil leaching; Dose-response; Toxicity threshold; Hormesis
资金
- National Key Research and Development Program of China [2020YFC1806300-04]
- National Natural Science Foundation of China [42177010]
This study determined the toxicity threshold of Zn in different soils through barley root elongation toxicity tests and found significant variations in toxicity thresholds among different soils. Leaching treatments reduced Zn toxicity in acidic soils. The results provide crucial reference values for Zn environmental criteria.
Currently, the scientific basis for establishing soil environmental criteria is lacking. In order to establish reasonable soil environmental criteria values suitable for soils with different properties, this study selected soils from 16 different sites to determine the toxicity threshold of Zn based on toxicity tests of barley root elongation. In addition, leaching treatments were set up in seven soils with different properties to eliminate the influence of the accompanying anions (Cl-) on the determination of the Zn toxicity threshold. The results indicated that the toxicity thresholds of different soils vary greatly. The EC10 and EC50 ranges of barley root elongation in 16 kinds of non-leached soils were 18.5 mg kg- 1 to 1618.7 mg kg- 1 and 277.9 mg kg- 1 to 3179.8 mg kg- 1, respectively. The hormesis effect appeared in the dose response of Zn, and relative barley root elongation reached more than 150%. Leaching significantly reduced the Zn toxicity in acidic soils. The variation ranges of the leaching factor (LF) in the seven soils were LF10 = 1.1-9.3, LF50 = 1.0-3.2. The LF prediction model indicated that pH explained 81.4% of the LF variation (p < 0.01). The soil pH, cation exchange capacity (CEC), and conductivity (EC) explained 97.8% of the EC50 variation in the leached soil (p < 0.01). The results provide reference values for Zn environmental criteria.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据