Abstract
The influences of concentration of metal chelation solution, pH values, the concentration of O2 supplied by some thermal power plants in Wuxi, and the concentration of SO32- on the adsorption performance were studied. The results indicated that the removal ratio improved with the increase of bulk concentration. However, when the concentration exceeded 15mmol/L, the increase rate reduced. It was found that the chelation ability enhanced with the increase of pH values as well as the decrease of oxygen concentration in the flue gas. The SO32- in the solution was beneficial to improve and extend the adsorption capacity of Fe (II) EDTA. According to the FI-IR, the carboxyl in Na2EDTA coordinated with Fe(II). XPS showed that Fe2+ was the main valence of Fe in Fe(II)EDTA. Through the calculation of fold peak area, the content of Fe2+ was 72.17%. And the existence of Fe2+ in the Fe(II)EDTA was pivotal for the complexation.
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