Nutrient distribution within and release from the contaminated sediment of Haihe River

Miny Wu, Suiliang Huang, Wei Wen, Xueming Sun, Xianqiang Tang, Miklas Scholz

Research output: Contribution to journalArticlepeer-review

42 Citations (Scopus)

Abstract

We assessed nutrient characteristics, distributions and fractions within the disturbed and undisturbed sediments at four sampling sites within the mainstream of Haihe River. The river sediments contained mostly sand (> 60%). The fraction of clay was < 3%. Total nitrogen (TN) and total phosphorus (TP) concentrations ranged from 729 to 1922 mg/kg and from 692 to 1388 mg/kg, respectively. Nutrient concentrations within the sediments usually decreased with increasing depth. The TN and TP concentrations within the fine sand were higher than for that within silt. Sediment phosphorus fractions were between 2.99% and 3.37% Ex-P (exchangeable phosphorus), 7.89% and 13.71% Fe/Al-P (Fe, Al oxides bound phosphorus), 61.32% and 70.14% Ca-P (calcium-bound phosphorus), and 17.03% and 22.04% Org-P (organic phosphorus). Nitrogen and phosphorus release from sediment could lead to the presence of 21.02 mg N/L and 3.10 mg P/L within the water column. A river restoration project should address the sediment nutrient stock.

Original languageEnglish
Pages (from-to)1086-1094
Number of pages9
JournalJournal of Environmental Sciences
Volume23
Issue number7
DOIs
Publication statusPublished - Jul 2011
Externally publishedYes

Keywords

  • Calcium-bound phosphorus
  • Disturbed aquatic sediment
  • Organic phosphorus
  • River restoration
  • Total nitrogen and phosphorus
  • Undisturbed aquatic sediment

ASJC Scopus subject areas

  • Environmental Engineering
  • Environmental Chemistry
  • General Environmental Science

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