Effects of pretreatment on the sequential phosphorus fractionation of anaerobic sediment

https://doi.org/10.4081/jlimnol.2014.871

Authors

  • Lei Zhang | leizhang@niglas.ac.cn Chinese Academy of Sciences, China.
  • Qianjiahua Liao Department of Environmental Science, China Pharmaceutical University, China.
  • Chao Zeng Department of Environmental Science, China Pharmaceutical University, China.
  • Qiongli Mo Department of Environmental Science, China Pharmaceutical University, China.
  • Chengxin Fan

Abstract

Phosphorus (P) fractionation is critical to understand P cycling in sediment and across the sediment–water interface. To examine the effect of pretreatment on the P fractionation of anaerobic sediment, anaerobic sediment samples were treated by oven-drying, air-drying, and freeze-drying, and a fresh sediment sample was used as a control treatment. A five-step sequential extraction procedure was applied, and six P fractions were examined. The results indicated that PNaCl (P extracted by NaCl), PBD (P extracted by Na2S2O4 and NaHCO3), PNaOH (P extracted by NaOH), and organic P were significantly influenced by pretreatment, whereas PHCl (P extracted by HCl) and residual P were not significantly affected by pretreatment. Compared to fresh sediment, drying treatments decreased PNaCl, PNaOH, and organic P but increased PBD. Among the three drying methods, oven-drying resulted in the greatest change in P fractionation; the effects of air-drying and freeze-drying were similar to each other. The total extracted P were similar among the four pretreatment methods. For the measurement of accurate P fractions, fresh sediment is the best option.

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Published
2014-03-03
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Original Articles
Supporting Agencies
Nat. Natural Science Foundation of China (41103033), Fundamental Research Funds Central Universities (JKQ2011030), Basic research program of Jiangsu Province (BK2011879), State Major Project of Water Pollution Control and Management (2012ZX07103-005).
Keywords:
pretreatment, phosphorus fractionation, sequential extraction, sediment.
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How to Cite
1.
Zhang L, Liao Q, Zeng C, Mo Q, Fan C. Effects of pretreatment on the sequential phosphorus fractionation of anaerobic sediment. J Limnol [Internet]. 2014 Mar. 3 [cited 2021 Sep. 17];73(2). Available from: https://www.jlimnol.it/index.php/jlimnol/article/view/jlimnol.2014.871

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