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首页> 外文期刊>Journal of Environmental Science and Health. A, Toxic/Hazardous Substances & Environmental Engineering >Origins and Mobility of Phosphorus Forms in the Sediments of Lakes Taihu and Chaohu, China
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Origins and Mobility of Phosphorus Forms in the Sediments of Lakes Taihu and Chaohu, China

机译：太湖和巢湖沉积物中磷形态的起源和迁移

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摘要

Phosphorus release from the sediment is generally an important factor for lake eutroph-ication. We have investigated phosphorus forms in surface sediments from Lake Taihu and Lake Chaohu by a chemical extraction method. The results showed that the concentrations of Fe/Al-bound phosphorus (Fe/Al-P) and organic phosphorus (Org-P) had significant correlations with those of amorphous Fe/Al oxides and organic matter in the sediments. Furthermore, Ca-bound phosphorus (Ca-P) concentrations were well related to total organic carbon (TOG) concentrations. The results also indicated that higher pH weakened the association of phosphates with the Fe/Al hydroxides and then resulted in Fe/Al-P release. The increase of pH was companied with autogenetic progresses of calcium carbonate and then elevated Ca-P concentrations in the sediments. In conclusion, external P loadings determine spatial distribution of P fractions, especially Fe/Al-P and Org-P, and partially contribute to additional Ca-P fractions in these highly human-disturbed lakes. The pH-induced phosphorus mobility in the sediments is very important for these lakes.
机译：沉积物中的磷释放通常是湖泊富营养化的重要因素。我们已经通过化学提取方法研究了太湖和巢湖表面沉积物中的磷形态。结果表明，沉积物中Fe / Al结合的磷（Fe / Al-P）和有机磷（Org-P）的浓度与非晶态的Fe / Al氧化物和有机质具有显着的相关性。此外，钙结合磷（Ca-P）的浓度与总有机碳（TOG）的浓度密切相关。结果还表明，较高的pH会削弱磷酸盐与Fe / Al氢氧化物的缔合，然后导致Fe / Al-P释放。 pH的升高伴随着碳酸钙的自生过程，然后沉积物中Ca-P浓度升高。总而言之，外部P负荷决定了P部分（尤其是Fe / Al-P和Org-P）的空间分布，并在这些高度人为干扰的湖泊中部分贡献了额外的Ca-P部分。 pH诱导沉积物中磷的迁移率对于这些湖泊非常重要。

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