Assessment of phosphorus release from alluvial sediments using single extraction: a case study in Can Gio, Southern Vietnam

Authors

  • Thi Thu Dung Tran* Faculty of Environment, University of Science, Vietnam National University, Ho Chi Minh city
  • Thanh Thoang Ngo Faculty of Environment, University of Science, Vietnam National University, Ho Chi Minh city
  • Ngoc Tuyen Nguyen Faculty of Environment, University of Science, Vietnam National University, Ho Chi Minh city
  • Bich Chau Tran Faculty of Environment, University of Science, Vietnam National University, Ho Chi Minh city
  • Minh Hoang Truong Faculty of Geology, University of Science, Vietnam National University, Ho Chi Minh city

Abstract

Sediment-water interaction is a complicated process; hence, it is essential to know the potential mobility of an element from sediment to the aquatic environment. In this study, the potential mobility of phosphorus (P) in sediment from Can Gio was investigated. Three single extractions were applied including a mild salt (NH4Cl), an acid (HCl), and a base (NaOH) each representing different environmental factors during sediment resuspension. Other geochemical parameters were also determined. The total amount of P in the sediments varied from 320.41 mg/kg to 668.22 mg/kg in five sampling sites. The general range of potential mobility of P decreased as follows: P-mild (3.70- 13.13 mg/kg) < P-base (36.80-78.53 mg/kg) < P-acid (133.85-380.57 mg/kg). Although P-acid was not easily released to the environment, its relatively high concentration can affect the aquatic environment when the environment becomes acidic.

Keywords:

phosphorus release, sediment, sediment resuspension, single extraction

DOI:

https://doi.org/10.31276/VJSTE.62(4).60-64

Classification number

5.1

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Published

2020-12-15

Received 7 August 2020; accepted 30 October 2020

How to Cite

Thi Thu Dung Tran, Thanh Thoang Ngo, Ngoc Tuyen Nguyen, Bich Chau Tran, & Minh Hoang Truong. (2020). Assessment of phosphorus release from alluvial sediments using single extraction: a case study in Can Gio, Southern Vietnam. Vietnam Journal of Science, Technology and Engineering, 62(4), 60-64. https://doi.org/10.31276/VJSTE.62(4).60-64

Issue

Section

Environmental Sciences