The multicomponents of the produced water often results in the formation of the solid solution, such as BaxSr1-xSO4. The suspended solids collected from industry often show the presence of Sr2+ in the BaSO4 scale, indicating the formation of BaxSr1-xSO4 solid solution. Thus, it is important to study the solubility, kinetics and inhibition of the solid solution to have a better prediction of the sulfate scale deposition rate and amount. In this research, we will mainly focus on the effect of the incorporation of Sr2+ on the deposition rate of BaxSr1-xSO4 solid solution scale. The flow through system with two different reactors was used in the experiments. From the experimental results, we can find that the deposition rate of the BaxSr1-xSO4 solid solution decreased significantly with the increase of strontium concentration at a constant barium sulfate supersaturation. The deposition rate decreased up to six times when strontium concentration in aqueous phase increased from [Sr2+] = 0.5[Ba2+] to [Sr2+] = 8[Ba2+], all with SIBarite = 0.9. The decrease of the SI of the BaxSr1-xSO4 solid solution was found with the increase of Sr2+ in the aqueous phase. This might be the reason for the retardation of Sr2+ on BaxSr1-xSO4 deposition rate.

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