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• W3125177669 abstract "A Prosopis juliflora-seed-modified Amberlite IRA-400 Cl- ion-exchange resin (hereafter denoted as SMA resin) is used for the removal of Pb2+ from wastewater. SEM, EDX, FT-IR, BET, XRD, and XPS analyses were used to characterize the SMA resin. Parameters such as Pb2+ concentration, pH, temperature, and time are optimized. The obtained results show that the SMA resin has high efficiency for the removal of Pb2+ (73.45%) at a concentration of 100 mg L-1 and a dosage of 0.01 g at pH 6. Thermodynamic studies indicate that the adsorption was spontaneous with negative ΔH° and ΔS° values at all temperatures; pseudo-second-order kinetics and the Langmuir adsorption isotherm provided the best fit (qmax = 106 mg g-1 and R2 = 0.99) from 298 to 338 K. In addition, a diffusion-controlled mechanism at 298 K was observed from intra-particle studies. A desorption and recovery process has been applied successfully to the SMA adsorbent. The obtained results showed desorption of 90.7% at pH 2.5 with 86.3% recovery over six cycles. Furthermore, the DFT results suggest that all the functional groups of the SMA resin possibly bind with Pb2+ and, of these, the -C[double bond, length as m-dash]O group shows the highest binding energy towards Pb2+. Moreover, the high-efficiency removal of Pb2+ from synthetic wastewater using the proposed SMA resin was demonstrated to show the real-life application potential." @default.
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• W3125177669 date "2021-01-01" @default.
• W3125177669 modified "2023-09-27" @default.
• W3125177669 title "An Amberlite IRA-400 Cl⁻ ion-exchange resin modified with <i>Prosopis juliflora</i> seeds as an efficient Pb²⁺ adsorbent: adsorption, kinetics, thermodynamics, and computational modeling studies by density functional theory" @default.
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• W3125177669 doi "https://doi.org/10.1039/d0ra10128a" @default.
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