Maleic Acid Separation from Aqueous Solutions Utilizing Amberlite LA-2
Keywords:Keywords: Maleic acid, Amberlite LA-2, distribution coefficients (KD), loading coefficients (Z), extraction efficiency (%E)
This study investigates the potential uses of Amberlite LA-2 for the recovery of maleic acid from an aqueous solution. The effects of the initial concentration of maleic acid and Amberlite LA-2, pH, contact time, and temperature were determined and evaluated. The experimental results of extraction were used to calculate the distribution coefficient (KD), and extraction efficiency (E%). The results show that the extraction efficiency increased with the increase in the initial concentration of maleic acid, where the percentage increased from 92.65% to 99.01% when the concentration of acid was increased from 0.01 to 0.075 N. The percentage of maleic acid extraction was also increased from 85.3 to 98% with the increase in the concentration of Amberlite LA-2 from 0.044 to 0.22 M. The acid extracted from the aqueous phase to the organic phase increases with time, and the quantitative transfer of maleic acid occurred after 60 minutes. At a concentration of 0.05 M, the percentage of extracted acid was observed to increase from 98.8% to 99.95% when temperature was increased from 25 to 40 oC. The highest percentage of acid extraction was recorded at pH=3, which is (90.3%). The maximum loading modulus reached a value of 1.6877 at a concentration of 0.044 M of the secondary amine.
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