THE SYNTHESIS OF POLYVINYLIDENE FLUORIDE (PVDF) MEMBRANE DISPERSED BY MOLECULARLY IMPRINTED POLYMERS (MIPs) FOR THE REMOVAL OF 2,4-DINITROPHENOL (2,4-DNP) FROM AQUEOUS SOLUTION
2,4-Dinitrophenol has been used in many applications such as dyes, wood <br /> <br /> preservatives, and pesticides, but is toxic and non-biodegradable. 2.4-dinitrophenol <br /> <br /> waste can be dissolved and accumulated in water. When it is in high concentrations <br /...
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| Format: | Theses |
| Language: | Indonesia |
| Online Access: | https://digilib.itb.ac.id/gdl/view/31784 |
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| Institution: | Institut Teknologi Bandung |
| Language: | Indonesia |
| Summary: | 2,4-Dinitrophenol has been used in many applications such as dyes, wood <br />
<br />
preservatives, and pesticides, but is toxic and non-biodegradable. 2.4-dinitrophenol <br />
<br />
waste can be dissolved and accumulated in water. When it is in high concentrations <br />
<br />
it will be harmful to human health and the environment. Therefore, proper handling <br />
<br />
of 2,4-dinitrophenol wastes is required. In this research, Molecularly Imprinted <br />
<br />
Polymers (MIPs) was dispersed by polyvinylidene fluoride (PVDF) membrane for <br />
<br />
the absorption of 2,4-dinitrophenol. MIPs was synthesized using a bulk <br />
<br />
polymerization technique involving 2,4-dinitrophenol as a template, acrylamide as <br />
<br />
functional monomer, ethylene glycol dimethacrylate (EGDMA) as crosslinker and <br />
<br />
benzoyl peroxide (BPO) as an initiator in the mol ratio of 1: 5: 15: 1.6 dissolved in <br />
<br />
30 mL acetonitrile. The 2,4-Dinitrophenol bound to the synthesis of MIPs was <br />
<br />
subsequently released by the soxhletation method using a 75% methanol as solvent <br />
<br />
in glacial acetic acid. Furthermore, MIPs performance compared with Non <br />
<br />
Imprinted Polymers (NIP) and characterized using Scanning Electron Microscopy <br />
<br />
(SEM) and Fourier Transform Infra Red (FTIR) spectroscopy. The MIPs dispersed <br />
<br />
into the PVDF membrane by a phase inversion method prepared by adding 50 mg <br />
<br />
of MIPs powder to 20% PVDF (w/v) solution in N,N-dimethylformamide (DMF) <br />
<br />
as the solvent and distilled water as non-solvent. The obtained membranes were <br />
<br />
characterized by FTIR spectroscopy, and the permeability values were determined. <br />
<br />
The results showed that the value of adsorption capacity (qe) and the average <br />
<br />
absorption percentage of MIPs is greater than NIP. In MIPs obtained qe and percent <br />
<br />
absorption of 9.32 mg/g and 56.75% while NIP have qe and absorption percentage <br />
<br />
equal to 4.22 mg/g and 25.74%. Based on the FTIR spectrum analysis, the presence <br />
<br />
of a sharp peak at the wave number 1570-1500 cm-1 corresponding to -NO2 group <br />
<br />
in the 2,4-dinitrophenol bound to the MIPs template did not appear on the NIP <br />
<br />
spectrum. Based on the SEM image, the MIPs dispersed PVDF membrane has a <br />
<br />
thickness that is thinner than the PVDF membrane so that the separation process on <br />
<br />
the dispersed membrane occured more rapidly. The membrane separation process <br />
<br />
of the 2,4-dinitrophenol sample was tested based on the determination of the <br />
<br />
rejection coefficient at pH 3, 4, 5 and 6. The results showed that both membranes <br />
<br />
had an optimum rejection percentage value at pH 5 of 81.85% with a permeability <br />
<br />
value of 9.14454 Lm-2h-1bar-1 on the MIPs dispersed membrane and 76.98% with a <br />
<br />
permeability value of 3.93208 Lm-2h-1bar-1 on original PVDF membrane. <br />
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