Research Of Adsorption Effects And Mechanisms Of PAM On Soil Texture

In recent years, Pam improvement in soil on soil aggregate structure, soil erosion control, water saving irrigation, agricultural production and application of ecological environment protection and other fields great value. With the development of scientific research, its soil erosion control, water conservation ecological environment protection in areas such as irrigation, the value of improving significantly. Is now the research of application about Pam much focus on attention to macro-and surface-scale improve soil erosion and increase soil to water infiltration, and the storage capacity of, and the development of Pam and Adsorption Mechanism of soil particles. Pam in the Production Practice and Study on the adsorption process is the focus of the content of the soil particles, but Pam adsorption Effect of soil particles and a lot of factors, such as soil particles of different textures, Pam, soil of their own. In view of the above problems, this test is based on characteristics of different texture soils in Inner Mongolia Region (mainly composed of particle size of Soil Texture), on the basis of past experiments, select the sand, sand and silty clay loam soil of three mass. And based on sigmaplot12.0fitting analysis of the Adsorption Mechanism of Soil Texture on PAM, look for consistent with the theoretical model of isothermal adsorption in soil texture Pam, for the adsorption of Pam in different soil textures and reasonable utilization provided in the related fields.By exploring different soil textures, such as adsorption Thermodynamics of adsorption dynamics, scientific research methods determine the absorption of Pam in different soil textures to see Pam in soil adsorption and Adsorption Mechanism of initial.1.PAM in different soil textures, as the quality of liquid-solid, rise of the adsorption equilibrium, soil adsorption of random contact PAM increase the number of responses of, in adsorption capacity and these two elements is proportional in a certain range, to increase the absorption capacity fast, but when the soil adsorption capacity of adsorption equilibrium, soil adsorption capacity of PAM on stabilizing. Experiments that PAM in sand, sand and powdered clay loam soil in the best quality of liquid-solid than15:1,20:1and20:1, respectively, adsorption equilibrium time is8h,10h and12h, respecti-vely; when experimental ambient temperature of35℃, PAM in the sand, sand and powdered clay loam soil in the best liquid-solid than20:1,25:1and25:1, respectively, adsorption equilibrium time is10h,12h and12h respectively. 2.PAM in the sand, sand and powdered clay loam soil best liquid-solid quality release by adsorption equilibrium time of the saturated absorption capacity is1.400mg/g,5.181mg/g and6.833mg/g; experimental temperature of35degrees centigrade, PAM in the sand, sand and powdered clay loam soil best quality than the balance of liquid-solid saturated adsorption capacity of the time1.256mg/g,2.144mg/g and1.478mg/g respectively. That is, PAM at room temperature in the three different texture soils saturated adsorption capacity in the form of powdered clay loam> loamy sand> sand; experimental temperature of35degrees centigrade, PAM among the three different texture soils saturated adsorption capacity of showing relative to the saturated absorption capacity at normal temperatures significantly reduced.3. By adjusting the correlation coefficient comparison found that the Langmuir model for PAM adsorption equilibrium isotherm in three soil texture, Langmuir equation model of a more representative and effective, the adjusted correlation coefficient is more than0.91. Three Changes of relative absorption capacity of Soil Texture on the adsorption of Pam range between1.613and10.167. Therefore, using Langmuir equation model fitting Pam conduct an in-depth study on adsorption in soil.4. Adsorption kinetics of adsorption of dynamic model of double-chamber level performance in turning adsorption rate and slow absorption rate for the three types of soil texture effects of adsorption PAM. Adsorption reaction of the previous9hours, sand and powdered clay loam to sandy soil and soil adsorption of different concentrations of Pam main rate of adsorption effect of adsorption dynamics. Sand, sand and powdered clay loam soil adsorption reaction of the previous9hours, fast absorption rate of more than60per cent of the relative percentage of the total amount of adsorption in soil.7hours after the adsorption reaction, sand and powdered clay loam to sandy soil and soil adsorption of different concentrations of Pam for the slow rate of adsorption effect of adsorption dynamics. Sandy soil and sand and powdered clay loam soil within7hours after the adsorption reaction, slow absorption rate of soil between the relative percentage of the total amount of adsorption72-95. Analysis, on the adsorption rate and slow absorption rate in of three kinds of soil texture on adsorption of turning period of time as the main cause of adsorption dynamics of different respectively.5. The three types of soil textures as the adsorbent test Pam adsorption characteristics under different temperature conditions. Experimentally calculatedAH is negative, the description of the three types of soil texture on PAM adsorption reaction is an exothermic process, the consistent with the assumptions before; the three kinds of soil texture on PAM in the process of adsorption reaction, calculated△G is negative, the description of the three types of soil texture on PAM adsorption reaction is spontaneous and does not require enzymatic catalysis reaction; When the adsorption of elevated ambient temperature from298degrees Fahrenheit to308degrees Fahrenheit, absolute value less adsorption of gibbs free energy, hindering the three types of soil texture on adsorption reaction of PAM, three kinds of soil texture on PAM and desorption reaction, reducing the three types of soil texture on the adsorption of Pam’s relative absorption capacity. AS is negative, Describes three kinds of soil texture on the role of Pam response,25degrees centigrade temperature adsorption reaction, smaller absolute entropy of35degrees centigrade temperature adsorption and desorption reaction occurs. Study on the relationship between force and energy three types of soil texture on the adsorption of Pam forces are mainly chemical bonding force, and may at the same time there is a Van der Waals Force and Hydrogen bonding, dipole margin of force, and so on.