Approximately 2 g of PEI was dissolved in 20 g of methanol for 30 minutes while stirring. Wet impregnation method was used to make the PEI-M MMT composite sorbents, which was adapted from the literature with slight changes. The M MMT was then added to the abovementioned methanol solution and stirred at room temperature for 3h. The slurry was then dried for 12h at 75 0 C in a vacuum oven. PEI-M MMT samples with various PEI loadings of 2,4,6,8,10, and 40 wt percent were prepared to optimize the PEI loading on the M MMT.