Isotherm and kinetic of adsorptive Purolite S108 mixed matrix membrane for boron adsorption
Excess boron in the water may cause adverse effects on humans, animals, and plants. An adsorptive mixed matrix membrane (MMM) containing Purolite S108 resin as an active filler was developed in the current study to remove boron from water. A flat sheet membrane was fabricated from a dope solution of...
| Main Authors: | , , |
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| Format: | Conference or Workshop Item |
| Language: | English English |
| Published: |
Elsevier Ltd
2023
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| Subjects: | |
| Online Access: | http://umpir.ump.edu.my/id/eprint/41807/1/Isotherm%20and%20kinetic%20of%20adsorptive%20Purolite%20S108_ABST.pdf http://umpir.ump.edu.my/id/eprint/41807/2/Isotherm%20and%20kinetic%20of%20adsorptive%20Purolite%20S108.pdf |
| Summary: | Excess boron in the water may cause adverse effects on humans, animals, and plants. An adsorptive mixed matrix membrane (MMM) containing Purolite S108 resin as an active filler was developed in the current study to remove boron from water. A flat sheet membrane was fabricated from a dope solution of 20 wt% polyethersulfone (PES), 5% polyvinylpyrrolidone, 1% Purolite S108 and 74% n-methyl-2-pyrrolidone using a phase inversion process. The membrane was characterized by Field Emission Scanning Electron Microscope (FESEM) and porosity. Both the pristine PES and Purolite S108 MMM membranes displayed an asymmetric structure with different macrovoid patterns at the bottom. The larger macrovoid at the bottom of the pristine PES membrane suggested a faster demixing rate during the membrane phase inversion process. In contrast, the Purolite S108 MMM showed a teardrop macrovoid that formed due to changes in the membrane material's surface energy or chemical composition. These changes created areas where the membrane was less wettable, causing water droplets to form instead of spreading out. Furthermore, the Purolite S108 MMM membrane exhibited slightly higher porosity than the pristine PES membrane, with porosity values of 43.27% and 38.05%, respectively.The adsorption isotherm and kinetic of the Purolite S108 MMM were evaluated using an aqueous boron solution. Three two-parameters adsorption isotherms were tested: Langmuir, Freundlich and Temkin. Purolite S108 MMM is best fitted to the Langmuir adsorption isotherm with the maximum binding capacity of 1.4349 mg B/g membrane. Pseudo-first order (PFO) and pseudo-second-order (PSO) models were tested in the kinetic experiment. The boron uptake by the Purolite S108 MMM followed a PFO kinetic model. The adsorption isotherm and kinetic data of the Purolite S108 MMM are essential for further optimizing the adsorptive membrane operation for boron removal. |
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