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• W2349820232 abstract "通过现场调查和室内模拟实验,对滇池35个上覆水-沉积物磷的分布特征以及沉积物中磷释放动力学特征进行研究,结果表明:滇池表层沉积物中不同形态磷含量表现为:有机磷(OP)(1482.49±1156.82 mg/kg) > 钙结合态磷(Ca-P)(865.54±558.40 mg/kg) > 金属氧化物结合态磷(Al-P)(463.77±662.18 mg/kg) > 残渣态磷(Res-P)(218.52±83.11 mg/kg)>可还原态磷(Fe-P)(128.13±101.56 mg/kg)>弱吸附态磷(NH₄Cl-P)(2.26±3.05 mg/kg);滇池上覆水草海总磷浓度处于劣Ⅳ类水平,外海不同湖区总磷浓度介于Ⅳ~Ⅴ类之间;滇池水体中的磷以颗粒态磷含量最高;滇池表层沉积物中磷的释放是由快反应和慢反应两部分组成.释放过程主要发生在前8h内;不同区域沉积物磷的最大释放速率、最大释放量、磷的释放潜力平均值均表现为:草海 > 外海北部 > 外海南部 > 湖心区;滇池表层沉积物中磷的释放主要由NH₄Cl-P、Fe-P、Al-P和OP进行,其中,NH₄Cl-P和Fe-P所占比重较大;磷的释放与上覆水中溶解性总磷、溶解态无机磷和溶解态有机磷呈显著正相关,预示着上覆水中磷的迁移转化更多地受到水-沉积物界面浓度梯度的控制,进一步说明不能以总磷含量来评价湖泊磷素释放的状况,需与磷形态及分布特征相结合进行分析.;The distribution status and release characteristics of phosphorus were investigated by studying the lease kinetics characteristics and phosphorus forms from thirty-five sediment samples collected in Lake Dianchi. Results indicated that: The rank order of phosphorus contents in the surface sediment of Lake Dianchi was organic P(OP)(1482.49±1156.82 mg/kg) > calcium-bound P(Ca-P)(865.54±558.40 mg/kg) > metal oxide-bound P(Al-P)(463.77±662.18 mg/kg) > residual P(Res-P)(218.52±83.11 mg/kg) > Fe-bound P(Fe-P)(128.13±101.56 mg/kg) > weakly absorded P(NH₄Cl-P) (2.26±3.05 mg/kg); The amount of total phosphorus in overlying water exceed V class in Caohai and between Class Ⅳ and Class Ⅴ in other sections. The amount of particulate P(PP) is the highest among total phosphorus(TP); The process of phosphate release from the surface sediment to the water in Lake Dianchi mainly occurred in the first 8 h and the kinetics were divided into the rapid-stage and the slow-stage. The rank order of mean values of maximal phosphorus adsorption rate(V_max), maximal phosphours adsorption capacities(Q_max), the release potential of sedimentary phosphorus(IDE-P) were Caohai>northern coast > southern coast > lake center; From the correlation parameters, phosphorus release can be inferred to obtain the contribution degree of different forms of phosphorus on release potential of phosphorus in the sediments of Lake Dianchi. Therefore, the evaluation of sediment phosphorus release risk should not be only limited to the analyse of the basic physical and chemical properties. Great attention should be paid to the contents of different forms of phosphorus content and their proportions of total phosphorus." @default.
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• W2349820232 date "2015-01-01" @default.
• W2349820232 modified "2023-10-14" @default.
• W2349820232 title "Distribution and release characteristics of phosphorus in water-sediment interface of Lake Dianchi" @default.
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• W2349820232 doi "https://doi.org/10.18307/2015.0506" @default.
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