Sorption Behaviors Of Cobalt, Nickel And Vanadium Ions In A Petrochemical Sewage Of Xinjiang

The sample of this research got from the desert soil in Wujiaqu Sinkiang is the unpollutedsoil around the sewage library of a petroleum plant. The ionic strength, the initial concentration,the ambient temperature, the PH value of the sample solution, and the adsorption time aredetermined by means of the static batch method to investigate their effects on the adsorption ofthe earth for a single metal, like cobalt, nickel and vanadium, and the bi-metal competedcompositions of cobalt and nickel.4kinetics and thermodynamics simulations of the adsorptionare used for the data linear fitting. Data analysis is characterized by SPSS, a mathematicalstatistics software. One-Way ANOVA and Stepwise multiple linear regression method areutilized to analyse remarkable extents of the single factor on the earth adsorption capacity forheavy metal ions and present equations of linear regression according to the contributions ofthese5factors.（1）The adsorption of the soil for single element Co, Ni: the soil adsorption capacities forsingle element are increasing with the increase of the soil PH value till the value is4while theadsorption capacities keep stable, respectively; Raising the ion concentration, the adsorptioncapacities for both Co and Ni tend to decline sharply then placidly. In addition, highertemperatures promote the adsorption capacities. The adsorption capacities increase with the timeand then keep stable. The time for Co and Ni to reach stable point are3h and9h,respectively.With the raise of the initial concentration, the adsorption capacities show anincreasing trend.（2）The adsorption for the single element V: the adsorption behavior to the single elementV is different from other elements. Raising the PH value, the earth adsorbs the single element Vwithout any obvious rule. The adsorption capacity of the soil to V ions can reach an adsorptionequilibrium in a short time about1h. While increasing the concentration of the ion intensity, onthe contrary, the adsorption capacity increases and when the intensity up to0.6mol/L thecapacity meets a slight decline. The ambient temperature gets higher along with the decrease ofthe adsorption capacity. （3）Concrete analysis of soil adsorption for complex metal cobalt or nickel are as follows:its absorptive capacity increases when pH value goes up while its absorptive capacity is tendingtowards stability as the pH value rises continuously above4; the increasing ionic strength leadsto a decline of that absorptive capacity; with the extension of adsorption time, the absorptivecapacity increase and achieve stability finally; the absorptive capacity increases as thetemperature or initial concentration of solution raises. Compared with the adsorption of the soilfor pure metal cobalt or nickel under the same conditions, the adsorption for complex metalcobalt falls off obviously while the adsorption for complex metal nickel shows little change.（4）Due to the diversity in appropriate adsorption models of thermodynamics anddynamics based on fitting of different metal ions in soil, the crucial element of influence that thesoil has on heavy metal ions studied by SPSS differs.