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洱海表层沉积物吸附磷特征

何宗健 刘文斌 王圣瑞 焦立新 赵海超

何宗健, 刘文斌, 王圣瑞, 焦立新, 赵海超. 洱海表层沉积物吸附磷特征[J]. 环境科学研究, 2011, 24(11): 1242-1248.
引用本文: 何宗健, 刘文斌, 王圣瑞, 焦立新, 赵海超. 洱海表层沉积物吸附磷特征[J]. 环境科学研究, 2011, 24(11): 1242-1248.
HE Zong-jian, LIU Wen-bin, WANG Sheng-rui, JIAO Li-xin, ZHAO Hai-chao. Phosphate Adsorption Characteristics on the Surface Sediments of Erhai Lake[J]. Research of Environmental Sciences, 2011, 24(11): 1242-1248.
Citation: HE Zong-jian, LIU Wen-bin, WANG Sheng-rui, JIAO Li-xin, ZHAO Hai-chao. Phosphate Adsorption Characteristics on the Surface Sediments of Erhai Lake[J]. Research of Environmental Sciences, 2011, 24(11): 1242-1248.

洱海表层沉积物吸附磷特征

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

Phosphate Adsorption Characteristics on the Surface Sediments of Erhai Lake

  • 摘要: 试验研究了洱海表层沉积物吸附磷动力学与等温吸附过程,探讨了总有机质与总钙对沉积物吸附磷参数的影响. 结果表明:①洱海表层沉积物对磷的吸附动力学过程均可分为2个阶段,即快速吸附阶段和慢速吸附阶段. 快速吸附阶段主要发生在0~0.5 h内,而慢速吸附阶段主要发生在0.5~5 h,所有沉积物均在5 h内基本达到吸附平衡. ②不同采样点沉积物对磷的Qmax(最大吸附容量,为904.60~1 420.34 mg/kg)及MBC(最大缓冲容量,为477.33~2 300.95 L/kg)均以西岸沉积物明显高于东岸,但其EPC0(吸附-解吸平衡浓度,为0.015~0.068 mg/L)则相反. ③沉积物总有机质和总钙含量与其Qmax和Vmax(最大吸附速率)呈显著正相关,但与EPC0呈显著负相关. ④洱海表层沉积物吸附磷参数Vmax和Qmax明显高于长江中下游浅水湖泊沉积物,而参数EPC0较低. 因此,洱海沉积物释放风险较大但现今释放量较小,与洱海沉积物总有机质和总钙含量较高有关.

     

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出版历程
  • 收稿日期:  2011-03-11
  • 修回日期:  2011-05-27
  • 刊出日期:  2011-11-25

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