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洱海表层沉积物有机磷形态分布特征及其影响因素

孙 静 王圣瑞 曾清如 焦立新 金相灿 杨苏文

孙 静, 王圣瑞, 曾清如, 焦立新, 金相灿, 杨苏文. 洱海表层沉积物有机磷形态分布特征及其影响因素[J]. 环境科学研究, 2011, 24(11): 1226-1232.
引用本文: 孙 静, 王圣瑞, 曾清如, 焦立新, 金相灿, 杨苏文. 洱海表层沉积物有机磷形态分布特征及其影响因素[J]. 环境科学研究, 2011, 24(11): 1226-1232.
SUN Jing, WANG Sheng-rui, ZENG Qing-ru, JIAO Li-xin, JIN Xiang-can, YANG Su-wen. Distribution Characteristics of Organic Phosphorus Fractions and Influencing Factors in Surface Sediments of Lake Erhai[J]. Research of Environmental Sciences, 2011, 24(11): 1226-1232.
Citation: SUN Jing, WANG Sheng-rui, ZENG Qing-ru, JIAO Li-xin, JIN Xiang-can, YANG Su-wen. Distribution Characteristics of Organic Phosphorus Fractions and Influencing Factors in Surface Sediments of Lake Erhai[J]. Research of Environmental Sciences, 2011, 24(11): 1226-1232.

洱海表层沉积物有机磷形态分布特征及其影响因素

基金项目: 国家水体污染控制与治理科技重大专项(2008ZX07105-005);国家自然科学基金项目(40873079)

Distribution Characteristics of Organic Phosphorus Fractions and Influencing Factors in Surface Sediments of Lake Erhai

  • 摘要: 利用IVANOFF法,研究了洱海表层沉积物有机磷形态及其空间分布特征,探讨了有机质对各形态有机磷含量分布的影响. 结果表明:洱海北部和南部的浅水湖区沉积物w(OM)较高(2.50%~11.72%),而中部的深水湖区沉积物w(TP)较高(710.29~1 961.22 mg/kg);沉积物w(OP)为212.71~526.23 mg/kg,与w(TP)分布趋势一致;沉积物不同形态有机磷的含量为Residual-Po(残渣态有机磷)> Fulvic-P(富里酸结合态有机磷)> HCl-Po(酸提取态有机磷)>NaHCO3-Po(活性有机磷)>Humic-P(腐殖酸结合态有机磷). 沉积物w(OM)与w(OP)/w(TP),w(Fulvic-P)和w(Humic-P)之间均呈显著正相关(P<0.01),与w(Residual-Po)呈显著负相关(P<0.01),与w(NaHCO3-Po)和w(HCl-Po)之间相关性不显著(P>0.05). 洱海沉积物有机磷主要以非活性有机磷(Residual-Po和Humic-P)为主(平均占58.74%),且w(Fulvic-P)占w(OP)的百分比均高于营养水平较高的湖泊,而w(HCl-Po)占w(OP)的百分比相对较低(除E7采样点外). 即洱海沉积物有机磷形态特征决定了其生物有效性较低. 沉积物有机磷赋存形态特征很可能是上覆水磷浓度相对较低的重要原因,而沉积物w(TOC)/w(OP)<200则意味着其有机磷的潜在释放风险较大.

     

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出版历程
  • 收稿日期:  2011-04-06
  • 修回日期:  2011-05-07
  • 刊出日期:  2011-11-25

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