Notice of RetractionStudy on Scale Inhibition Performance by Calcined Hydrotalcite

Notice of Retraction

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Mg₃Al Layered Double Hydroxides (Mg₃Al-LDH) and calcined Mg₃Al layered double hydroxides (Mg₃Al-CLDH) are prepared. According to the gas field in northern Shaanxi water quality analysis results, this kind of wastewater is simulated in the laboratory, this paper studies on removal rate of easily scaling carbonate anion by Mg₃Al-CLDH. For carbonate anion solution with concentration of 100 mg/L, the removal rate of carbonate anion could be over 59% by addition of 1.0g/L Mg₃Al-CLDH after 4h reaction at 20°C, and pH=10~12, but the removal rate of 100 mg/L carbonate anion by Mg₃Al-CLDH after four times recycling may still be 57.79%, so the removal rate may reach up to 90% after multiple times recycling use of Mg₃Al-CLDH. Mg₃Al-CLDH has the characteristics of eco-friendliness, reusability, low cost and so on, so calcined hydrotalcite is an ideal material that is used in wastewater scale inhibition in the oil and gas fields.