Pollution and Potential Ecological Risk Assessment of Heavy Metals in Water Bodies in the Vicinity of Industrial Zones

Date Received: Jul 02, 2023

Date Accepted: Aug 28, 2024

Date Published: Sep 30, 2024

DOI: https://doi.org/10.31817/vjas.2024.7.3.05

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Issue: Vol. 7 No. 3 (2024): Vietnam Journal of Agricultural Sciences

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NATURAL RESOURCES AND ENVIRONMENT

How to Cite:

Tu, N., Huy, T., Ha, N., Hung, L., & Hang, H. (2024). Pollution and Potential Ecological Risk Assessment of Heavy Metals in Water Bodies in the Vicinity of Industrial Zones. Vietnam Journal of Agricultural Sciences, 7(3), 2228–2238. https://doi.org/10.31817/vjas.2024.7.3.05

Pollution and Potential Ecological Risk Assessment of Heavy Metals in Water Bodies in the Vicinity of Industrial Zones

Nguyen Ngoc Tu (*) 1, 2 , Trinh Quang Huy 1 , Nguyen Thi Thu Ha 1 , Le Tien Hung 1   , Ho Thi Thuy Hang 1

  • Corresponding author: nguyenngoctu@vnua.edu.vn
  • 1 Faculty of Natural Resources and Environment, Vietnam National University of Agriculture, Hanoi 12400, Vietnam
  • 2 Environmental Analysis Laboratory, Center of Research Excellence and Innovation, Vietnam National University of Agriculture, Hanoi 12400, Vietnam

    • Keywords

    Ecological risk assessment, heavy metal, accumulation, sediment, industrial wastewater

    Abstract


    This research was undertaken to determine the concentrations of heavy metal ions in the surface water and sediment in water bodies that receive wastewater from the Dinh Tram and Pho Noi A industrial zones. The pollution status of the heavy metal ions and their potential ecological risks were evaluated by using the potential ecological risk index (RI) and risk assessment code (RAC). The results showed that some metal ions, namely Fe3+, Ni2+, and Pb2+, exceeded the allowed standards of QCVN 08:2023/BTNMT. The sediments were polluted by Zn2+, As2+, Cr6+, and Fe3+ at concentrations 2.4, 3.7, 1.9, and 2.0 times higher, respectively, than the QCVN 43:2017/BTNMT. The potential ecological risk indices for the heavy metal ions were in order as: (As2+) = 7.94 > (Cd2+) = 3.68 > (Cr6+) = 3.39 > (Pb2+) = 2.73 > (Cu2+) = 2.74 > (Zn2+) = 2.4 (T6 channel) and (As2+) = 11.1 > (Cd2+) = 7.74 > (Cu2+) = 2.64 > (Cr6+) = 2.31 > (Pb2+) = 1.9 > (Zn2+) = 0.87 (Bun River). The risk assessment code (RAC) ranged from 0.17 to 39.42 (T6 channel) and from 0.03 to 38.96 (Bun River). The RAC-based risk assessment results showed that both the T6 channel and Bun River presented a medium risk for Cd2+, a low risk for Mn2+, Zn2+, Cu2+, and Ni2+, and no risk for the remaining metals, Cr6+, Pb2+, As2+, and Fe3+. These results were caused by the differences in environmental quality assessments between using separate parameters versus biological risk assessments.

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