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首页> 外文期刊>Marine Chemistry >Distribution, partitioning and mixing behavior of phosphorus species in the Jiulong River estuary
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Distribution, partitioning and mixing behavior of phosphorus species in the Jiulong River estuary

机译：九龙江口磷素的分布，分配和混合行为

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摘要

Surface and bottom water samples were collected along a salinity gradient from the Jiulong River estuary during May 2010 to examine the distribution and mixing behavior of dissolved and particulate phosphorus (P) species. Particulate P was further fractionated into five operationally defined phases through a sequential extraction method. In addition to field studies, laboratory experiments were carried out to examine key processes regulating the distribution and partitioning of P during estuarine mixing. Dissolved inorganic P (DIP) was the main species in the total dissolved P (TDP) pool, comprising up to 83 ± 3% at river end-member station and 32 ± 21% at coastal stations. While the concentration of dissolved organic P (DOP) changed little with salinity, DIP concentrations varied dramatically between stations, especially in the low-salinity (S ＜ 3) and high-salinity regions, indicating intensive removal/addition and transformation between P species in the water column. The predominance of DIP and low abundance of DOP reflected a profound influence of anthropogenic inputs from the Jiulong River. The total particulate P (TPP) contributed up to 70 ± 10% of the total phosphorus (TP = TDP + TPP) in the low-salinity area, showing a quasi-negative correlation with DIP during early estuarine mixing (S ＜ 3), but the TPP decreased sharply with salinity, comprising 39 ± 19% of the TP pool in middle and higher salinity regions. River inputs, biological production (mostly for biogenic apatite and organic P), and repartitioning of P between dissolved and particulate (labile P) phases were major factors responsible for the dynamic variations in P species in the estuary. Deviation in results of laboratory mixing experiments from those of the field investigation indicated that, in addition to physicochemical and biological processes, additional end-member waters and sediment resuspension also play a role in controlling the mixing behavior and biogeochemical cycling of P in the Jiulong River estuary. Values of the distribution coefficient of P (in terms of logK_d) were consistently high, but they were similar among stations with different salinities and had a poor correlation with suspended particulate matter concentration, likely due to the relatively long flushing time, elevated DIP, and lower colloidal effect in the Jiulong River estuary. Compared with results from early studies, elevated DIP from anthropogenic sources seemed to have altered the mixing behavior of P species in the estuarine environment.
机译：2010年5月，从九龙河口沿盐度梯度采集了地表水和底水样品，以检查溶解性和颗粒性磷（P）物种的分布和混合行为。通过顺序萃取方法将颗粒P进一步分为五个操作定义的相。除田间研究外，还进行了实验室实验，以检查在河口混合过程中调节P分布和分配的关键过程。溶解态无机磷（DIP）是总溶解态磷（TDP）库中的主要物种，在河流末段站占83±3％，在沿海站占32±21％。尽管溶解性有机磷（DOP）的浓度随盐度变化不大，但各站之间的DIP浓度变化很大，尤其是在低盐度（S ＜3）和高盐度地区，这表明该地区磷种之间的密集去除/添加和转化。水柱。 DIP的优势和DOP的低丰度反映了九龙江人为投入的深远影响。在低盐度地区，总磷P（TPP）贡献了总磷（TP = TDP + TPP）的70±10％，在河口早期混合过程中与DIP呈负相关（S ＜3），但是TPP随盐度而急剧下降，在中部和较高盐度地区占TP库的39±19％。河流输入，生物生产（主要用于生物磷灰石和有机磷）以及磷在溶解相和颗粒相（不稳定的P）之间的重新分配是造成河口P物种动态变化的主要因素。实验室混合实验结果与现场调查结果的差异表明，除了理化和生物过程外，更多的最终成员水和沉积物再悬浮在控制九龙江中磷的混合行为和生物地球化学循环方面也起着作用。河口。 P的分布系数值（以logK_d表示）一直很高，但在盐度不同的站点之间相似，并且与悬浮颗粒物浓度的相关性很差，这可能是由于冲洗时间相对较长，DIP升高和九龙河河口的胶体作用较低。与早期研究的结果相比，人为来源的DIP升高似乎改变了河口环境中P物种的混合行为。

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  • 来源
    《Marine Chemistry》 |2013年第20期|93-105|共13页
  • 作者

    Peng Lin; Laodong Guo; Min Chen; Yihua Cai;

  • 作者单位

    College of Ocean and Earth Sciences, State Key lab of Marine Environmental Science, Xiamen University, Xiamen 361005, China School of Freshwater Sciences, University of Wisconsin-Milwaukee, 600 East Greenfield Avenue, Milwaukee WI 53204, USA;

    School of Freshwater Sciences, University of Wisconsin-Milwaukee, 600 East Greenfield Avenue, Milwaukee WI 53204, USA;

    College of Ocean and Earth Sciences, State Key lab of Marine Environmental Science, Xiamen University, Xiamen 361005, China;

    College of Ocean and Earth Sciences, State Key lab of Marine Environmental Science, Xiamen University, Xiamen 361005, China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Phosphorus; Nutrients; Estuarine mixing; Chemical speciation; Jiulong River estuary;

    机译：磷;营养素;河口混合;化学形态九龙河口;

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