Application of diffusive gradients in thin films to determine rare earth elements in surface sediments of Daya Bay, China: Occurrence, distribution and ecotoxicological risks
文献类型： 外文期刊
作者： Gu, Yang-Guang 1 ; Huang, Hong-Hui 1 ; Gong, Xiu-Yu 1 ; Liao, Xiu-Li 1 ; Dai, Ming 1 ; Yang, Yu-Feng 2 ;
作者机构： 1.Chinese Acad Fishery Sci, South China Sea Fisheries Res Inst, Guangzhou 510300, Peoples R China
2.Jinan Univ, Coll Life Sci & Technol, Key Lab Philosophy Social Sci Guangdong Prov, Southern Marine Sci & Engn Guangdong Lab Zhuhai, Guangzhou 510632, Peoples R China
3.Key Lab Fishery Ecol & Environm, Guangzhou 510300, Guangdong, Peoples R China
4.Minist Agr & Rural Affairs, Key Lab Open Sea Fishery Dev, Guangzhou 510300, Peoples R China
5.Chinese Acad Fishery Sci, Key Lab Big Data South, China Sea Fishery Resources & Environm, Guangzhou, Peoples R China
关键词： Rare earth elements; Ecotoxicological risks; Combined toxicity; Sediments; Bioavailability
期刊名称：MARINE POLLUTION BULLETIN （ 影响因子：7.001； 五年影响因子：7.301 ）
ISSN： 0025-326X
年卷期： 2022 年 181 卷
页码：
收录情况： SCI
摘要： Known as burgeoning contaminants, the bioavailability of rare earth elements (REEs) can be determined using diffusive gradients in thin films (DGT). As Daya Bay (South China) has been under serious anthropogenic influences, the present study examined the distribution of REEs in surface sediments and their possible ecological risks in the bay. The range of DGT-labile concentrations of REEs ( n-ary sumation REEs) was from 5.67 mu g/L to 8.41 mu g/L, with an average of 7.34 mu g/L. Results of assessment of single REE toxicity revealed that the risk quotient (RQ) values of Y, Ce and Yb were >1, indicating that their potential negative impacts on the nearby environment. However, analysis of the integral toxicity of REE mixtures through assessment of probabilistic ecotoxicological risks showed that there was a negligibly low probability of toxicity of PRE surface sediments to aquatic organisms in the study area.
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