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Impact of Suspended Inorganic Particles on Phosphorus Cycling in the Yellow River (China)

机译：悬浮的无机颗粒对黄河中磷循环的影响（中国）

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摘要

Phosphorus (P) in water and sediment in the Yellow River was measured for 21 stations from the source to the Bohai Sea in 2006-2007. The average total particulate matter (TPM) increased from 40 mg/L (upper reaches) to 520 mg/L (middle reaches) and 950 mg/L in the lower reaches of the river. The average dissolved PO_4 concentration (0.43 μmol/L) was significantly higher than that in 1980's but lower than the world average level despite high nutrient input to the system. Much of the P input was removed by adsorption, which was due to the high TPM rather than the surface activity of the particles since they had low labile Fe and low affinity for P. The sediment was a sink for P in the middle to lower reaches but not in the upper to middle reaches. TPM has been reduced by more than an order of magnitude due to artificial dams operating over recent decades. Modeling revealed that TPM of 0.2-1 g/L was a critical threshold for the Yellow River, below which most of the phosphate input cannot be removed by the particles and may cause eutrophication. These findings are important for river management and land-ocean modeling of global biogeochemical P cycling.
机译：2006-2007年，从源头到渤海共测量了21个站的黄河水和沉积物中的磷（P）。河流下游的平均总颗粒物（TPM）从40 mg / L（上游）增加到520 mg / L（中游）和950 mg / L。尽管向系统中输入了大量养分，但平均溶解PO_4浓度（0.43μmol/ L）明显高于1980年代，但低于世界平均水平。大部分P输入通过吸附去除，这是由于TPM高而不是颗粒的表面活性所致，因为它们的Fe不稳定且对P的亲和力低。沉积物是中下游的P汇。但不在上游到中游。由于近几十年来的人工水坝运行，TPM已减少了一个数量级以上。模型显示，TPM为0.2-1 g / L是黄河的临界阈值，低于该阈值，大部分磷酸盐输入无法被颗粒物去除，并可能引起富营养化。这些发现对于全球生物地球化学磷循环的河流管理和陆地海洋建模非常重要。

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  • 来源
    《Environmental Science & Technology》 |2013年第17期|9685-9692|共8页
  • 作者

    Gang Pan; Michael D. Krom; Meiyi Zhang; Xianwei Zhang; Lijing Wang; Lichun Dai; Yanqing Sheng; Robert J. G. Mortimer;

  • 作者单位

    Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China;

    Earth and Biosphere Institute, School of Earth and Environment, University of Leeds, Leeds LS2 9JT, U.K.,Charney School of Marine Sciences, University of Haifa, Mount Carmel, Haifa 31905, Israel;

    Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China;

    Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China;

    Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China;

    Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China;

    Key Laboratory of Coastal Zone Environmental Processes, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai 264003, China;

    Earth and Biosphere Institute, School of Earth and Environment, University of Leeds, Leeds LS2 9JT, U.K.;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
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