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Coupling biological assays with diffusive gradients in thin-films technique to study the biological responses of Eisenia fetida to cadmium in soil

文献类型： 外文期刊

作者： Gu, Xueyuan 1 ; Liu, Zhimin 1 ; Wang, Xiaorong 1 ; Luo, Jun 1 ; Zhang, Hao 3 ; Davison, William 3 ; Ma, Lena Q. 1 ; Xue, 1 ;

作者机构： 1.Nanjing Univ, Sch Environm, State Key Lab Pollut Control & Resource Reuse, Nanjing 210023, Jiangsu, Peoples R China

2.Shanghai Acad Agr Sci, Inst Agrifood Stand & Testing Technol, Shanghai 201403, Peoples R China

3.Univ Lancaster, Lancaster Environm Ctr, Lancaster LA1 4YQ, England

4.Univ Florida, Soil & Water Sci Dept, Gainesville, FL 32611 USA

5.Changzhou Environm Monitor

关键词： Cd;Bioavailability;Diffusive gradients in thin-films;Eisenia fetida;Biological response

期刊名称：JOURNAL OF HAZARDOUS MATERIALS （ 影响因子：10.588； 五年影响因子：10.129 ）

ISSN： 0304-3894

年卷期： 2017 年 339 卷

页码：

收录情况： SCI

摘要： This work sets out to investigate biological responses of Eisenia fetida to Cd, based on the bioavailable rather than total concentration of Cd, in soils. E. fetida was cultured for 14d in three selected Chinese soils amended with 0.1-40 mg kg(-1) Cd. Potentially bioavailable concentrations of Cd were measured in soil solution, in extractions using CaCl2 and HAc solutions, and using the technique of diffusive gradients in thin-films (DGT). Antioxidant system responses in E. fetida to Cd were measured as biological endpoints. Biological responses were more highly correlated with Cd concentrations evaluated using bioavailable methods than with total concentrations. Cd concentration measured using DGT and CaCl2 extraction provided the narrowest ranges of lowest observed effect concentration (LOEC) values based on biological responses, indicating the potential use of these measurements in management of soil quality and setting soil remediation standards. The LOEC values obtained from 15 field soils contaminated by Cd were similar to those from the three Cd-amended soils and suggested that DGT in particular can be a good tool to predict stress responses of E. fetida to Cd in soils. The study shows the potential of combining biological response and DGT measurements in risk assessment. (C) 2017 Elsevier B.V. All rights reserved.

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