Journal of Ecology and Rural Environment ›› 2018, Vol. 34 ›› Issue (9): 850-856.doi: 10.11934/j.issn.1673-4831.2018.09.011

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Characteristics of Vertical Distribution of Organic Phosphorus by 31P-NMR Technical From Different Sources of Core Sediments in Gehu Lake

CHEN Jing1,2, ZHANG Yi-min2, YANG Fei2, KONG Ming2, ZHANG Zhi-wei1,2, BA Cui-cui1,2, YIN Jie1,2   

  1. 1. School of Environmental and Safety Engineering, Changzhou University, Changzhou 213164, China;
    2. Nanjing Institute of Environmental Sciences, Ministry of Environmental Protection, Nanjing 210042, China
  • Received:2017-09-15 Online:2018-09-25 Published:2018-10-25

Abstract:

Three typical core sediments located in different ecological sites were selected to study the content and vertical distribution characteristics of organic matters and organic phosphorus in Gehu Lake, characterizing the bioavailability of different organic phosphorus species of these sediments by chemical sequential fractionation and 31P-NMR technical. The results suggest that the content of organic matters decreased in vertical direction, and represented a distinct tendency in different ecological sites meanwhile:fishery farming area > estuary area > float grass area. The organic phosphorus species followed the order of Res-P > HCl-Po > NaOH-Po > NaHCO3-Po, and most of potential biological phosphorus NaHCO3-Po and NaOH-Po appeared in upper sediments. With the results of 31P-NMR, orthophosphate was dominant in biological phosphorus, P-monoester occupied a large proportion of organic phosphorus components, P-diester varied greatly by different ecological lake areas.

Key words: Gehu Lake, core sediment, organic phosphorus, 31P-NMR

CLC Number: