First evaluation of iron and manganese concentrations in coastal aquaculture water in Giao Thuy district, Nam Dinh province

Authors

  • Le Nhu Da Institute of Natural Products Chemistry, VAST, Vietnam; Graduate University of Science and Technology, VAST, Vietnam
  • Hoang Thi Thu Ha Institute of Natural Products Chemistry, VAST, Vietnam
  • Pham Thi Mai Huong Hanoi University of Industry, Hanoi, Vietnam
  • Duong Thi Thuy Institute of Environmental Technology, VAST, Vietnam
  • Nguyen Truong Dong Institute of Natural Products Chemistry, VAST, Vietnam; VNU University of Science, Hanoi, Vietnam
  • Nguyen Thi Anh Huong VNU University of Science, Hanoi, Vietnam
  • Phung Thi Xuan Binh Electric Power University, Hanoi, Vietnam
  • Nguyen Van Phuong Institutes of Science and Technology, Hanoi, Vietnam
  • Le Thi Phuong Quynh Institute of Natural Products Chemistry, VAST, Vietnam; Graduate University of Science and Technology, VAST, Vietnam

DOI:

https://doi.org/10.15625/1859-3097/16655

Keywords:

Iron concentration, manganese concentration, coastal zone, aquaculture, Giao Thuy district.

Abstract

Aquaculture in the coastal zone has contributed significantly to economic development in Giao Thuy district, Nam Dinh province. Therefore, water quality for aquaculture plays a vital role in sustainable aquaculture production. In this paper, iron (Fe) and manganese (Mn) concentrations in aquaculture coastal water of Giao Thuy district were analyzed during the rainy season (September 2017, August 2018) and dry season at low tide. The results showed that Fe concentration varied from 0.09 mg/L (at VT5) to 2.42 mg/L (at VT4), averaging 1.12 ± 0.71 mg/L, which exceeded the critical value of the national technical regulation on marine water quality in Vietnam for coastal aquaculture water (QCVN 10:2015/BTNMT) from 1.5 times (at VT4) to 3.0 times (at VT1). Mn concentrations ranged from 0.02 mg/L (at VT9) to 0.10 mg/L (at VT1), averaging 0.05 ± 0.02 mg/L, which was lower than the critical value in the QCVN 10:2015/BTNMT. The results showed that no apparent seasonal variation was observed for both Fe and Mn concentrations. In the dry season, the Fe and Mn concentrations averaged 1.10 mg/L and 0.05mg/L respectively, whereas they were 1.15 mg/L and 0.05 mg/L in the rainy season. The monitoring results showed that Fe was polluted in the study area and may affect aquaculture productivity. Therefore, helpful measures should be taken to minimize Fe pollution to protect water quality and develop sustainable aquaculture in Giao Thuy district, Nam Dinh province.

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Published

2021-09-30

How to Cite

Le, N. D., Hoang , T. T. H., Pham, T. M. H., Duong, T. T., Nguyen, T. D., Nguyen, T. A. H., Phung, T. X. B., Nguyen, V. P., & Le, T. P. Q. (2021). First evaluation of iron and manganese concentrations in coastal aquaculture water in Giao Thuy district, Nam Dinh province. Vietnam Journal of Marine Science and Technology, 21(3). https://doi.org/10.15625/1859-3097/16655

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Section

Articles