数字农科院2.0

Evaluation Of The Environment Risk, Fractions And Mobilization Of Nickel (Ni) In Sediments Of The Jialing River By Sediment Quality Guidelines, Sequential Extraction And Chelex-Agi Gel Dgt Probe

文献类型： 外文期刊

作者： Zhang, T; Li, LJ; Xu, F; Chen, XY; Du, L; Wang, XJ; Li, YX

作者机构：

关键词： Jialing River; Ni; Sqgs; Bcr; Dgt

期刊名称： APPLIED GEOCHEMISTRY

ISSN： 0883-2927

年卷期： 2020 年 118 卷

页码：

收录情况： JCR（2021版） ; EI（2021版）

摘要： The Jialing River is one of the largest tributaries of the Yangtze River and has the largest drainage area. Nickel (Ni) is a one of the most serious heavy metal contaminants in the downstream section of the Jialing River as a result of the prosperity of nearby chemical, electronic and mining industries. In the present work, sediment quality guidelines (SQGs), a Community Bureau of Reference (BCR) sequential extraction and the diffusive gradients in thin films (DGT) technique were applied to evaluate the environment risk, fractions and remobili- zation of Ni in the downstream Jialing River. The results indicated that the average total concentration of Ni (54.7 mg kg(-1) ) at all sites was higher than the background values of soil in China and Sichuan (26.9 and 35.8 mg kg(-1) , respectively). Environment risk assessment with four types of SQG values found that at three sites, the Ni concentration was over two high guideline values (probable effect concentration, PEC; effect range median, ERM), indicating that Ni may frequently pose a threat to the local aquatic ecosystem. The DGT results showed that C DGT -Ni had an inverse variation trend with C DGT -Fe and presented a significant increasing trend at the bottom of the DGT probes. Flux results revealed that sediments at S1, S2 and S3 were the source for Ni release across the sediment -water interface (SWI), and only S4 was a sink for Ni. Two further studies found that C DGT - Ni presented a significant negative correlation with C DGT -Fe. In addition, the "hotspot" of C DGT -Ni at the bottom correlated well with the ?dark area ? of C DGT -S. These results indicated that Fe and S were factors that mitigated the release of Ni in the sediments.

分类号：

  • 相关文献

[1]Assessing The Remobilization And Fraction Of Cadmium And Lead In Sediment Of The Jialing River By Sequential Extraction And Diffusive Gradients In Films (Dgt) Technique. Zhang, T, Li, LJ, Xu, F, Chen, XY, Du, L, Wang, XJ, Li, YX. 2020

[2]The Effect Of The Ferrihydrite D.issolution/Transformation Process On Mobility O f Arsenic In Soils: Investigated By Coupling A Two-Step Sequential Extraction With The Diffusive Gradient In The Thin Films (Dgt). Zhang, T, Zeng, XB, Zhang, H, Lin, QM, Su, SM, Wang, YA, Bai, LY, Wu, CX. 2019

[3]Nonpoint Source Pollution (NPSP) Induces Structural and Functional Variation in the Fungal Community of Sediments in the Jialing River, China. Xu, Fei,Zhu, Lanping,Wang, Jiaying,Xue, Yuqin,Liu, Kunhe,Zhang, Fubin,Zhang, Tuo. 2022

[4]Does sand mining affect the remobilization of copper and zinc in sediments? — A case study of the Jialing River (China). Fei Xu,Yuting Jia,Yu Wang,Fubin Zhang,Lijuan Li,Yunxiang Li,Liping Ren,Dan Wang,Tuo Zhang. 2021

[5]Assessing the environmental risk and mobility of cobalt in sediment near nonferrous metal mines with risk assessment indexes and the diffusive gradients in thin films (DGT) technique. Fei Xu,Yu Wang,Xinyi Chen,Luyu Liang,Yi Zhang,Fubin Zhang,Tuo Zhang. 2022

作者其他论文 更多>>