SYNTHESIS AND CHARACTERIZATION OF POLY([(2-methacryloyloxy) ethyl]) TRIMETHYLAMONNIUM CHLORIDE) RESIN WITH REMOVAL PROPERTIES FOR VANADIUM(V) AND MOLYBDENUM(VI)

Abstract

It was successful synthesized the ion exchange resin poly([(2-methacryloyloxy) ethyl]) trimethylammonium chloride) PClMETA by radical polymerization to study the removal properties towards vanadium (V) and molybdenum (VI) and compared with the commercial resin AmberliteIRA-402 which contains the same functional group. The resin was characterized by FT-IR and SEM. Parameters including water adsorption capacity, effect of the pH, maximum retention capacity of the metal ions, elution, regeneration, adsorption time, and adsorption isotherms were studied. All the studies were carried out in Batch and Column equilibrium procedures. Thermodynamic parameters such as enthalpy, entropy, and free energy were calculated. The PClMETA resin showed higher capacity to remove V(V) and Mo(VI) from water solution than Amberlite IRA-402 commercial resin. The higher capacity displayed by PClMETA resin was attributed to the higher degree of swelling and different structure that Amberlite IRA-402 resin.

Reusable Functionalized Hydrogel Sorbents for Removing Long- and Short-Chain Perfluoroalkyl Acids (PFAAs) and GenX from Aqueous Solution

“…Similar FTIR spectra are observation for PFOS spent sorbent A (Figure c). In the Figure S2b, the shoulder peak at 1265 cm –1 could be assigned as ν s (CF 2 ) contributed from PFOS after capturing on sorbent A . Due to the poor sorption of PFBA and PFBS by sorbent A, the peak for carbonyl group is not clear and not distinguishable in the FTIR spectra 4d and 4e (Figure d,e).…”

“…In the Figure S2b, the shoulder peak at 1265 cm –1 could be assigned as ν s (CF 2 ) contributed from PFOS after capturing on sorbent A. 32 Due to the poor sorption of PFBA and PFBS by sorbent A, the peak for carbonyl group is not clear and not distinguishable in the FTIR spectra 4d and 4e (Figure 4d,e). However, additional peaks were deconvoluted in the range from 1300 to 1000 cm –1 shown in Figure S2c,d, Tables S5 and S6.…”

“…31 Moreover, the peaks shown in peak deconvolution, 1141 and 1485 cm −1 (Figure S2a), could be assigned as ν(C−N) and ν(−N + −(CH 3 ) 3 ), respectively. 27,32 The FTIR spectra of sorbent C, which is bifunctionalized, are shown in Figure 2d. The characterized peaks for C−F and C−N were recognized in the FTIR spectra, and the locations of these peaks were similar to those presence in the FTIR spectra of sorbent A and sorbent B.…”

Removal of Phthalic Acid and Isophthalic Acid From Aqueous Solution by Anion Exchange Resin

“…Changes in standard free energy (ΔG°), entropy (ΔS°) and enthalpy (ΔH°) were estimated by the following Eq. 11 -13 [23,24]. (11) ( 1 2 ) ( 1 3 )…”

Preparation of Anion-Exchange Cellulose for the Removal of Chromate

“…Changes in standard free energy ( G°), entropy ( S°) and enthalpy ( H°) were estimated by the following Eq. 6-8 [37,38] = RTln ……………… (6) ln = ……………………… 7°=°°……………………… 8In these equations, K c is the equilibrium constant and it was calculated by q e /C e , R -1 K -1 ), and T is the temperature (K). Parameters change in enthalpy ( H 0 ) and change in entropy ( S 0 ) are calculated from the slope and the intercept of the linear plot of ln K c vs. 1/T.…”