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

In this study, Langmuir, Frendlich and Henry models were used to study theadsorption thermodynamics process of Sr, V and Ni ions in the uncontaminated soilthat collected from the surrounding of petrochemical wastewater reservoir in Xinjiang.The adsorption properties of single element and competitive were compared, and therelationships of the temperature, solution ionic strength, pH value, initialconcentration of metal ions with the adsorption of soil capacity were alsoconsidered.The results were as follows:(1) The characterization of single adsorption of the tested soils to Sr, V and Niions. The results showed that under the same initial concentrations, the adsorptioncapacity of Ni ion was highest in the soil, followed by V ion and the lowest was Sr ion.Within the range of the experimental concentrations, the adsorption capacities soil toSr, V and Ni ions were increased with the increased of metal ions concentrations. Theresults of investigated the influence of environmental factors on the soil adsorptioncapacities of metal ions show that, the adsorption of soil on Ni and V ions wereincreased with the environmental temperature rising (40℃>25℃>15℃). However,when it comes to Sr ion, the adsorption capacity was strongest at40℃and followedby that of at15℃and the weakest value was at25℃. The sorption capacities of soilon V, Ni ions were increased with the increases of the solution ionic strength, but forSr ion, the sorption capacities firstly increased and then decreased. When it comes topH, the adsorption capacity of soil on metal ions were to rise to reach equilibriumstate with the increase of pH value. The adsorption equilibrium time of soil on Sr, Vand Ni ions were in3h,1h and9h respectively. The single ion equilibrium data werefitted to Langmuir, Freundlich and Temkin models.(2) The study of double component competitive adsorption of Ni ion between Srand V ions. The results shows that the adsorption of soil to these three metal ions have certain selectivity. When Sr ion and Ni ioncoexistent, the adsorption amount of soil onNi ion is larger than that of Sr ion. When V and Ni ions coexistent, the adsorptioncapacity of soil on V ion was smaller than that of Ni ion. And with the increase ofinitial concentrations, the adsorption amount of Ni ion was increased. In theNon-Isosteric adsorption state, the effect of V ion to Ni ion is much bigger than theeffect of Ni ion to V ion while Ni ion to Sr ion bigger than Sr ion to Ni ion. the effectof environmental factors on the soil adsorption of metal ions were also investigated inthis study.(3) the competitive sorption of Sr, V and Ni ions was also considered in thispaper. The results shows that, under the the same initial ions concentrations, thesorption capacity of Ni ion was highest and the secondary was V ion, the lowest wasSr ion. There was no significant effect on the sorption of Ni ion when pH valuechanged. Under the acidity and neutral environment, the sorption of V ion is greaterthan that of Sr ion. In alkaline conditions, the sorption quantity of Sr ion is greaterthan V ion. In the end, we tentatively discusses the sorption properties of soil on Srion, V and Ni ions in the conditions of the existence of metal Ti ion.