不同性质农田土壤中铜的可提取性与生物有效性及毒性
文献类型：期刊论文
| 作者 | 朱侠1,2; 李连祯1 ; 涂晨1; 骆永明2,3
|
| 刊名 | 土壤
 |
| 出版日期 | 2020 |
| 卷号 | 52期号:5页码:911-919 |
| ISSN号 | 0253-9829 |
| 关键词 | 土壤 铜 可提取性 生物有效性 生物毒性 阈值 |
| 其他题名 | Extractability, Bioavailability and Toxicity of Cu in Farmland Soils with Different Properties |
| 文献子类 | Article |
| 英文摘要 | The environmental quality standards based on total contents of heavy metals can't meet the requirements of current soil management, studies on risk assessment and toxicity threshold that considering the bioavailability of heavy metals have great significance for the revision of corresponding standards.In this study, three farmland soils with different properties, i.e, black soil, meadow cinnamon soil, unsubmerged paddy soil, were selected and biological toxicity tests were conducted by simulating Cu pollution, four chemical extractants with different extraction capacities, including HNO_3, EDTA-Na_2, NH_4OAc and CaCl_2, were used to extract bioavailable Cu, the relationship between Cu extractability, bioavailability and toxicity were analyzed, and the toxicity thresholds of Cu were deduced for lettuce and earthworm Eisenia foetida.The results showed that HNO_3(41.4%) and EDTA-Na_2(56.8%) had strong Cu extraction ability, but NH_4OAc(0.12%) and CaCl_2(8.70%) had weak ability.Cu extracted by CaCl_2 significantly correlated with Cu accumulated in lettuce, the toxic effect, and the acute mortality of earthworms, while Cu extracted by HNO_3 significantly correlated with the chronic toxicity and Cu accumulated in earthworms.Based on the effective concentration of different extractable Cu, the deduced EC20 for lettuce ranged from 90.5 mg/kg to 170 mg/kg based on HNO_3, 103 mg/kg to 195 mg/kg based on EDTA-Na_2, 3.97 mg/kg to 20.1 mg/kg based on NH_4OAc and 0.21 mg/kg to 8.68 mg/kg based on CaCl_2, while the deduced EC20 for earthworm Eisenia foetida ranged from 138 mg/kg to 193 mg/kg based on HNO_3, 108 mg/kg to 226 mg/kg based on EDTA-Na_2, 8.92 mg/kg to 11.6 mg/kg based on NH_4OAc and 0.36 mg/kg to 10.6 mg/kg based on CaCl_2.The deduced EC50 for lettuce ranged from 110 mg/kg to 188 mg/kg based on HNO_3, 119 mg/kg to 230 mg/kg based on EDTA-Na_2, 5.69 mg/kg to 32.2 mg/kg based on NH_4OAc and 0.26 mg/kg to 9.62 mg/kg based on CaCl_2, while the deduced EC50 for earthworm Eisenia foetida ranged from 183 mg/kg to 221 mg/kg based on HNO_3, 180 mg/kg to 331 mg/kg based on EDTA-Na_2, 13.1 mg/kg to 18.3 mg/kg based on NH_4OAc and 0.54 mg/kg to 13.2 mg/kg based on CaCl_2.The results have great significance for the selection and optimization of effective extraction methods of heavy metals in soils and the revision of environmental quality standards based on heavy metals bioavailability. |
| 语种 | 中文 |
| CSCD记录号 | CSCD:6850152 |
| 资助机构 | 国家重点研发计划项目 ; 中国科学院STS项目 |
| 源URL | [http://ir.yic.ac.cn/handle/133337/30319]  |
| 专题 | 烟台海岸带研究所_近岸生态与环境实验室 |
| 作者单位 | 1.中国科学院海岸带环境过程与生态修复重点实验室(烟台海岸带研究所),山东烟台264003; 2.中国科学院大学,北京100049; 3.中国科学院土壤环境与污染修复重点实验室(南京土壤研究所),南京210008 |
| 推荐引用方式 GB/T 7714 | 朱侠,李连祯,涂晨,等. 不同性质农田土壤中铜的可提取性与生物有效性及毒性[J]. 土壤,2020,52(5):911-919. |
| APA | 朱侠,李连祯,涂晨,&骆永明.(2020).不同性质农田土壤中铜的可提取性与生物有效性及毒性.土壤,52(5),911-919. |
| MLA | 朱侠,et al."不同性质农田土壤中铜的可提取性与生物有效性及毒性".土壤 52.5(2020):911-919. |
入库方式： OAI收割
来源：烟台海岸带研究所
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