ADSORPSI SENYAWA PARAQUAT DIKLORIDA PADA PESTISIDA DENGAN SILIKA GEL DARI LIMBAH AMPAS TEBU (Saccharum officinarum)

DARYONO, NIM. 06630013 (2012) ADSORPSI SENYAWA PARAQUAT DIKLORIDA PADA PESTISIDA DENGAN SILIKA GEL DARI LIMBAH AMPAS TEBU (Saccharum officinarum). Skripsi thesis, UIN SUNAN KALIJAGA.

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Abstract

A study on paraquat dichloride ion adsorption using silica gel adsorbent synthesized from bagasse ash by sol-gel method. The purpose of this research is studying the synthesis, characterization of silica gel and silica gel adsorption capacity for paraquat dichloride. Synthesis is done by incineration bagasse at temperatures of 700 °C for 4 hours. Bagasse ash was dissolved with sodium hydroxide at 100 °C for 30 minutes to produce sodium silicate. Gel formation through the addition of hydrochloric acid with a concentration of 6 M. Gel formed is washed with distilled water until a neutral filtrate from washing and dried at 50 oC for 18 hours. Characterization of silica gel made by Fourier trasform infra red (FT-IR) and gas sorption analyzer (GSA). The adsorption capacity of the adsorbent studied through interaction with paraquat dichloride. Silica gel is synthesized has the following characteristics: The FT-IR results showed that the silica gel has silanol groups and siloxane. The surface area, pore volume and pore diameter of silica gel synthesized row is 43,442 m2/g, 0,151 cc/g and 15,233 Å. Silica gel produced has the micropore pore size distribution, mesoporous, and macropore with the dominant faction in the mesoporous region. Based on linear regression coefficient (R2) of silica gel adsorption of paraquat by following the two-quasi-order model with a value of R2 = 0,970 and the adsorption isotherm follows Freundlich models with a value of R2 = 0,935. The results showed that the silica gel was able to adsorb paraquat ion adsorption energy (_E ads) = 901,568 kJ/mol. Keywords: Silica gel, paraquat dichloride, adsorption kinetics, equilibrium adsorption

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