SINTESIS GARAM M-POLISTIRIL SULFONAT (M=Na, Mg, Ca, Sr DAN Ba) SEBAGAI ADSORBEN KAROTENOIDA PADA MINYAK SAWIT MENTAH (CPO)
Abstract
Synthesis of salt adsorbent M-Polystyril Sulfonate (M-PSS) made from Na-PSS with chloride salts of magnesium, calcium, strontium and barium. Na-PSS was made by neutralizing the sulfonic acid polystyril (H-PSS) with NaOH. While the H-PSS is made of polystyrene sulfonation reaction with acetyl sulfate, with degrees sulfonasinya 9.1%. The experiment was conducted using laboratory scale and to know the result of ion exchange reaction at adsorbent was analyzed by AAS instrument (Atomic Adsorption Spectrophotometry) then characterized by FT-IR (Fourier Transformation Infrared), Melting Point (TL), BET (Brouner Emmet Teller) to see the pores, SEM (Scanning Electron Microscopy) and TEM (Transmission Electron Microscopy) whereas to know the amount of adsorbed carotenoids content was analyzed by UV-Visible spectrophotometry. Metal content in the M-PSS adsorbent, Na-PSS PSS, PSS-Mg, Ca-PSS, Sr-and Ba-PSS PSS, respectively; 775.42 ppm, 397.53 ppm, 661.16 ppm, 1252.4 ppm and 2013.5 ppm, which means there has been a change of Na metal with as much as 98.25% Mg, Ca: 98.07%, Sr: 84.84% and by as much as 87.21% Ba. FT-IR spectra of Na-PSS, PSS-Mg, Ca-PSS, Sr-and Ba-PSS PSS showed absorption bands of SO2-groups respectively: SO: 1189.1 cm-1, SO: 1168.0 cm-1, SO: 1170.0 cm-1, SO: 1178.1 cm-1, and SO: 1183.0 cm-1. TL of the five adsorbents M-PSS is > 350 ° C and the pores of the adsorbent M-PSS five small (somewhat closed pore) with a value of area = 0.01 m2 / g. The next M-PSS Adsorbent used to adsorb carotenoids of CPO carotenoids containing 479.7 ppm and in n-hexane desorpstion. The results showed that the five adsorbents can be used to adsorb carotenoids from palm oil. The five adsorbents showed that with the treatment of 0.75 gram of adsorbent, the concentration of 15 ml of CPO (Crude Palm Oil) solution in ethanol containing 1.44 mg of carotenoids gave the best result was PSS calcium adsorbent, carotenoid concentration of 496.63 ppm and percent recovery 65.28%.
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