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首页> 外文期刊>Environmental Science & Technology >Organic Phosphorus Sequestration in Subtropical Treatment Wetlands
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Organic Phosphorus Sequestration in Subtropical Treatment Wetlands

机译：亚热带处理湿地中的有机磷固存

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Diffuse phosphorus pollution is commonly remediated by diverting runoff through treatment wetlands to sequester phosphorus into soil layers.Much of the sequestered phosphorus occurs in organic forms,yet our understanding of its chemical nature is limited.We used NaOH-EDTA extraction and solution ~(31)P NMR spectroscopy to speciate organic phosphorus sequestered in a large treatment wetland (STA-1W) in Florida,USA.The wetland was constructed on previously farmed peat and was designed to remove phosphorus from agricultural runoff prior to discharge into the Everglades.Unconsolidated benthic floc that had accumulated during the 9-year operation of the wetland was sampled along transects through two connected cells dominated by cattail (Typha dominigensis Pers.) and an additional cell colonized by submerged aquatic vegetation,including southern water nymph (Najas guadalupensis(Spreng.) Magnus) and coontail(Ceratophyllum demersum L).Organic phosphorus was a greater proportion of the sequestered phosphorus in the cattail marsh compared to the submerged aquatic vegetation wetland,but occurred almost exclusively as phosphate diesters and their alkaline hydrolysis products.It was therefore markedly different from the organic phosphorus in mineral soils,which is dominated typically by inositol phosphates.Phosphate diesters are readily degradable in most soils,raising concern about the long-term fate of organic phosphorus in treatment wetlands.Further studies are now necessary to assess the stability of the sequestered organic phosphorus in response to biogeochemical and hydrological perturbation.
机译：弥漫性磷污染通常是通过将径流经处理湿地转移以将磷螯合到土壤层中来补救的。许多螯合的磷以有机形式存在，但我们对其化学性质的了解仍然有限。我们使用了NaOH-EDTA萃取和溶液处理〜（31 ）P NMR光谱法用于鉴定在美国佛罗里达的一个大型处理湿地（STA-1W）中隔离的有机磷，该湿地是在以前养殖的泥炭上建造的，旨在将其从农业径流中除去，然后排放到大沼泽地中。在湿地运行9年期间积累的絮凝物，通过样带通过两个连接的，由香蒲（Typha dominigensis Pers。）占主导地位的细胞和一个被淹没的水生植物定殖的额外细胞采样，包括南方水仙女（Najas guadalupensis（Spreng。 ）（Magnus）和coontail（Ceratophyllum demersum L）。与淹没的水生植物湿地相比，香蒲沼泽中的磷含量较高，但几乎仅以磷酸二酯及其碱性水解产物形式存在，因此与矿质土壤中的有机磷明显不同，后者通常以肌醇磷酸盐为主。在大多数土壤中都易于降解，引起人们对处理后湿地中有机磷的长期命运的关注。现在有必要进行进一步的研究，以评估螯合有机磷对生物地球化学和水文扰动的稳定性。

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  • 来源
    《Environmental Science & Technology》 |2006年第3期|p.727-733|共7页
  • 作者

    BENJAMIN L. TURNER; SUSAN NEWMAN; JANA M. NEWMAN;

  • 作者单位

    Smithsonian Tropical Research Institute,Apartado 0843-03092,Balboa,Ancon,Republic of Panama,and Everglades Division,South Florida Water Management District,3301 Gun Club Road,West Palm Beach,Florida 33406,USA;

    Smithsonian Tropical Research Institute,Apartado 0843-03092,Balboa,Ancon,Republic of Panama,and Everglades Division,South Florida Water Management District,3301 Gun Club Road,West Palm Beach,Florida 33406,USA;

    Smithsonian Tropical Research Institute,Apartado 0843-03092,Balboa,Ancon,Republic of Panama,and Everglades Division,South Florida Water Management District,3301 Gun Club Road,West Palm Beach,Florida 33406,USA;

  • 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);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 环境化学;
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