Study On The Characteristics Of Sediment Organic-mineral Complex Adsorption-desorption For Phosphorus In Yi Tong River

Based on Yi Tong river sediment as the research target, the centrifugal wet-screened aggregate law to extract different particle sizes of organic and inorganic compound, research of organic-inorganic compound sediment concentration of different time, by applying different solution, by applying different phosphorus pH value of phosphorus solution and in different temperature on phosphorus adsorption sorption-desorption condition, and the fixed ability of phosphorus, the research result indicates that:In dynamic adsorption process, the sediment particle size of the adsorption of organic-inorganic compound gradually increasing, and as time increases, adsorption leveled off; In 0～3h,10.02～16.29 mg/kg·h, is each period after several times to hundreds; Elovich equation is description of phosphorus fractionation organic and inorganic compound the optimal model adsorption. In the isothermal adsorption process, exert phosphorus solution concentration increases with each particle size, sediment organic and inorganic compound adsorption capacity increase gradually, stable; Langmuir equation can well describe sediment organic and inorganic compound of phosphorus adsorption properties.Under the condition in different pH value, the adsorption process of sediment particle size of the adsorption of organic-inorganic compound with pH value increases and increases; Under different temperature circumstance, with the rise of temperature, the sediment particle size of sediment organic and inorganic compound of adsorption equilibrium gradually increasing, gradually. And the conditions of the sediment particle size of organic-inorganic compound the adsorption quantity are 0.001～0.005mm>0.05-0.001mm>0.01-0.05mm>0.05-0.25mm, changchun city>Yi Tong county>Xinlicheng Reservoir downstream.Sediment organic and inorganic compound of phosphorus very similar, dynamic desorption increased over time, desorption gradually become stable ratio increases; In 0-3h,1.1133-4.73mg/kg·h, after all, is time-bound several times to hundreds of times;Elovich equations of the sediment organic and inorganic complex fitting better than double constant equation. By applying different concentrations of phosphorus solution with the increase of concentration desorption, desorption quantity also increases, be more stable.In different pH value condition, desorption with pH value increase volume increased, be more stable. At various temperatures, desorption with temperature and increasing amount. In all conditions, the diameter of the sediment organic and inorganic complex desorption are 0.001-0.005mm>0.05～0.001mm>0.01-0.05mm>0.05～0.25mm, changchun city>Yi Tong county>Xinlicheng Reservoir downstream.Over time and increase, sediment organic and inorganic compound phosphorus fixation, tends gradually increased temperature; At low concentration place larger, curve steep rise with concentration increases, curve leveled off. With the applied phosphate solution pH change, fixed amount of phosphorus also produces change, when pH3-5 increase, pH5-7 is reduced, pH7-11 increase. With the temperature, phosphorus fixation ratio increases. In all conditions, the diameter of the sediment organic and inorganic complex desorption are 0.001～0.005mm>0.05～0.001mm>0.01～0.05mm>0.05-0.25mm,changchun city>Yi Tong county>Xinlicheng Reservoir downstream.