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洱海沉积物有机质、铁、锰对磷的赋存特征和释放影响

张仕军 齐庆杰 王圣瑞 焦立新 金相灿 杨苏文 赵海超

张仕军, 齐庆杰, 王圣瑞, 焦立新, 金相灿, 杨苏文, 赵海超. 洱海沉积物有机质、铁、锰对磷的赋存特征和释放影响[J]. 环境科学研究, 2011, 24(4): 371-377.
引用本文: 张仕军, 齐庆杰, 王圣瑞, 焦立新, 金相灿, 杨苏文, 赵海超. 洱海沉积物有机质、铁、锰对磷的赋存特征和释放影响[J]. 环境科学研究, 2011, 24(4): 371-377.
ZHANG Shi-jun, QI Qing-jie, WANG Sheng-rui, JIAO Li-xin, JIN Xiang-can, YANG Su-wen, ZHAO Hai-chao. Effects of Organic Matter, Manganese and Iron on Phosphorus Fractions and Release in the Sediments of Erhai Lake[J]. Research of Environmental Sciences, 2011, 24(4): 371-377.
Citation: ZHANG Shi-jun, QI Qing-jie, WANG Sheng-rui, JIAO Li-xin, JIN Xiang-can, YANG Su-wen, ZHAO Hai-chao. Effects of Organic Matter, Manganese and Iron on Phosphorus Fractions and Release in the Sediments of Erhai Lake[J]. Research of Environmental Sciences, 2011, 24(4): 371-377.

洱海沉积物有机质、铁、锰对磷的赋存特征和释放影响

基金项目: 国家水体污染控制与治理科技重大专项(2008ZX07105-005)

Effects of Organic Matter, Manganese and Iron on Phosphorus Fractions and Release in the Sediments of Erhai Lake

  • 摘要: 利用SMT磷连续提取分级方法研究了洱海表层沉积物中磷的赋存特征,探讨有机质(OM),Fe和Mn对磷赋存形态及释放的影响,同时评估了洱海沉积物磷的释放风险. 结果表明:洱海表层沉积物w(TP)为710.3~1 961.2 mg/kg,其中w(Ca-P)最高(占36.9%~59.2%),w(OP)次之(占24.6%~36.9%),w(Fe/Al-P)最低(占9.8%~20.7%);w(OM)为25.0~119.6 mg/g,与w(TP)和w(Ca-P)呈显著负相关;w(总锰)为0.8~3.8 mg/g,w(总铁)为34.3~127.2 mg/g,均与w(TP)及其各形态磷含量呈显著正相关. 沉积物中w(Fe/Al-P)/w(Ca-P)比低于0.5,且w(总铁)/w(TP)远大于20,表明磷释放强度小,但w(TOC)/w(OP)<200,说明有机磷的潜在释放风险较大. w(TP)及其各形态磷含量均与无定形铁氧化物(Feo-Fep)含量呈显著正相关,而与结晶态铁氧化物(Fed-Feo)含量的相关性不显著,且全湖沉积物中的铁氧化物以Feo-Fep为主,表明洱海沉积物磷释放主要受Feo-Fep控制.

     

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出版历程
  • 收稿日期:  2010-10-11
  • 修回日期:  2010-11-16
  • 刊出日期:  2011-04-25

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