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ADSORPTION CHARACTERISTIC OF IRON ONTO POLY[EUGENOL-CO-(DIVINYL BENZENE)] FROM AQUEOUS SOLUTION Silvianti, Fitrilia; Siswanta, Dwi; Aprilita, Nurul Hidayat; Kiswandono, Agung Abadi
Jurnal Natural Volume 17, Number 2, September 2017
Publisher : Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (561.316 KB) | DOI: 10.24815/jn.v17i2.8076

Abstract

A study on the adsorption characteristic of Iron onto Poly[eugenol-co-(divinyl benzene)] (EDVB) from aqueous solution has been conducted. EDVB was produced and characterized by using FTIR spectroscopy. The adsorption was studied by a batch method by considering the factors affecting the adsorption such as initial metal ion concentration, adsorption selectivity, and mechanism of adsorption using a sequential desorption method. The adsorption of Iron onto EDVB followed a pseudo-2 order kinetics model with the rate constant of 0,144 L2 mmol-1 min-1. The adsorption isotherm was studied with Tempkin, Langmuir and Freundlich models. The adsorption capacity (Qmax) obtained by Langmuir isotherms was 250mg.L-1 while the equilibrium value was 0.8 Lmg-1. A competitive adsorption study showed that EDVB is adsorbed selectively towards Iron rather than Chromium, Coppers and Cadmium ions. The interaction type of Iron onto EDVB was determined by a sequential desorption.Keywords: Polyeugenol; divinyl benzene (DVB); adsorption; Iron; FeReferencesAbasi, C. Y.; Abia, A.A.; Igwe, J.C. Adsorption of Iron (III), Lead (II) and Cadmium (II) Ions by Unmodified Raphia Palm (Raphia hookeri) Fruit Endocarp. Environ. Res. 2011, 5 (3), 104-113, ISSN: 1994-5396, Medwell Journals. DOI: 10.3923/erj.2011.104.113Baes, F. C.; Mesmer, R. E. The Hydrolisis of Cations; John Wiley: New York, 1976Bakatula, E.N.; Cukrowska, E.M.; Weiersbye, L.; Mihali-Cozmuta, L.;Tutu, H. Removal of toxic elements from aqueous solution using bentonite modified with L-histidine. Water Sci. Technol.2014, 70 (12),2022-2030, DOI: 10.2166/wst.2014.450Bhattacharyya, K.G.; Gupta, S.S. Adsorption of Fe(III) from Water by Natural and Acid Activated Clays: Studies on equilibrium isotherm, kinetics and thermodynamics of interactions. Adsorption. 2006, 12 (3), 185-204,DOI : 10.1007/s10450-006-0145-0Carmona, M..; Lucas, A.D.; Valverde, J.L.; Velasco, B.; Rodriguez, J.F. Combined adsorption and ion exchange equilibrium of phenol on Amberlite IRA-420.Chem. Eng. J.2006, 117, 155-160, Doi : 10.1016/j.cej.2005.12.013Debnath, S.; Ghosh, U.C. Kinetics, isotherm and thermodynamics for Cr(III) and Cr(VI) adsorption from aqueous solutions by crystalline hydrous titanium oxide. J. Chem. Thermodin. 2008, 40: 67-77, DOI: 10.1016/j.jct.2007.05.014Djunaidi, M.C.; Jumina; Siswanta, D.; Ulbricht, M. Selective Transport of Fe(III) Using Polyeugenol as Functional Polymer with Ionic Imprinted Polymer Membrane Method. Asian J. Chem. 2015, 27 (12): 4553-4562, DOI : 10.14233/ajchem.2015.19228Febriasari, A.; Siswanta, D.; Kiswandono, A.A.; Aprilita, N.H. Evaluation of Phenol Transport Using Polymer Inclusion Membrane (PIM) with Polyeugenol as a Carrier. Jurnal Rekayasa Kimia dan Lingkungan. 2016, Vol. 11, No. 2, 99-106, DOI: 10.23955/rkl.v11i2.5112Foldesova, M.; Dillinger, P.; Luckac, P. Sorption and Desorption of Fe(III) on Natural and chemically modified zeolite. J. Radioanal. Nucl. Chem. 1999, Vol. 242, No. 1 (1999), 227-230, DOI: 10.1007/BF02345926Gupta, V.K.;Sharma, S. Removal of cadmium and zinc from aqueous solutions using mud.Environ. Sci. Technol. 2002, 36: 3612-3617, DOI: 10.1021/es020010vHandayani, D.S. Sintesis kopoli(eugenol-DVB) sulfonat dari Eugenol Komponen Utama Minyak Cengkeh Szygium aromaticum (Synthesis of copoly(eugenol-DVB) sulfonic from main components of eugenol clove oil Szygium aromaticum). Biopharmacy Journal of Pharmacological and Biological Sciences. 2004, 2 (2): 53-57 ISSN: 1693-2242. url : https://eprints.uns.ac.id/id/eprint/856Harimu, L.; Matsjeh, S.; Siswanta, D.; Santosa, S.J. Synthesis of Polyeugenyl Oxyacetic Acid as Carrier to Separate Heavy Metal Ion Fe(III), Cr(III), Cu(II), Ni(II), Co(II), and Pb(II) that Using Solvent Extraction Mehod. Indo. J. Chem. 2009, 9 (2): 261-266.Ho, Y.S.; McKay, G. Pseudo-second Order Model for Sorption Processes. Process. Biochem. 1999, 34, 451-465, DOI: 10.1016/S0032-9592(98)00112-5Ho, Y.S.; McKay, G.; Wase, D.A.J.;Forster, C.F. Study of Sorption Divalent Metal Ions on to Peat. Adsorpt. Sci. Technol. 2000, 18: 639-650. DOI : 10.1260/0263617001493693Indah, S.; Helard, D.;Sasmita, A. Utilization of maize husk (Zea mays L.) as low-cost adsorbent in removal of iron from aqueous solution. Water Sci. Technol. 2016, 73 (12), 2929-2935, DOI: 10.2166/wst.2016.154Kiswandono, A.A.; Siswanta, D.; Aprilita, N.H.; Santosa, S.J. Transport of Phenol through inclusion polymer membrane (PIM) using copoly(Eugenol-DVB) as membrane carries. Indo .J. Chem. 2012, 12 (2): 105-112. Doi : 10.22146/ijc.667Kousalya, N.; Gandhi, M.R.; Sundaram, C.S.; Meenakshi, S. Synthesis of nano-hydroxyapatite chitin/chitosan hybrid bio-composites for the removal of Fe(III).Carbohyd. Polym. 2010, 82: 594-599, DOI:10.1016/j.carbpol.2010.05.013Kumar, K.V.; Porkodi, K.;Rocha, F. Langmuir-Hinshelwood kinetics ? A theoretical study, Catalysis Communications. 2008, 9: 82-84, DOI:10.1016/j.catcom.2007.05.019Masel, R.I. Principles Adsorption and Reaction on Solid Surface; John Wiley Sons: Canada, 1996Moore, J. W.; Pearson, R.G. Kinetics and Mechanism Third Edition; John Wiley Sons: Canada, 1981.Ngah, W.S.W.; Ghani, S.A.; Kamari, A. Adsorption Behaviour of Fe(II) and Fe(III) Ions in Aqueous Solution on Chitosan and Cross-linked Chitosan Beads. Bioresource. Technol. 2005, 96: 443-450. DOI:10.1016/j.biortech.2004.05.022Rahim, E.A.; Sanda, F.; Masuda, T. Synthesis and Properties of Novel Eugenol-Based Polymers. Polymer Bulletin. 2004, Vol. 5, 93-100, DOI: 10.1007/s00289-004-0272-2Samarghandi, M.R.; Hadi. M.; Moayedi, M.; Askari, F.B. 2009. Two Parameter Isotherms of Methyl Orange Sorption by Pinecone Derived Activated Carbon. Iran. J. Environ. Health Sci. Eng., 6 (4): 285-294.Setyowati, L. 1998. Pengaruh Penambahan Divinil Benzena (DVB) pada Kopolimerisasi Kationik Poli[eugenol-co-(divinil benzena)] dan Sifat Pertukaran Kation Kopoligaramnya (The Effect of divinylbenzene (DVB) Addition to Eugenol-DVB Cationic Copolymerization and Its Use As Cation-Exchanger), Thesis, Faculty of Mathematics and Natural Sciences, Universitas Gadjah Mada, Yogyakarta, Indonesia.Shi, T.; Jia, S.; Chen, Y.; Wen, Y.; Du, C.; Guo, H.; Wang, Z. Adsorption of Pb(II), Cr(III), Cu(II), Cd(II) and Ni(II) onto a vanadium mine tailing from aqueous solution. J. Hazard. Mater. 2009, 169: 838-846, DOI: 10.1016/j.jhazmat.2009.04.020Sun, S.;Wang, A. Adsorption Kinetics of Cu(II) Ions Using N,O-Carboxymethyl-Chitosan. J. Hazard. Mater. 2006, B131: 103-111, DOI: 10.1016/j.jhazmat.2005.09.012Sun, S.; Wang, L.;Wang, A. Adsorption Properties of Crosslinked Carboxymethyl-chitosan Resin With Pb(II) as Template Ions. J. Hazard. Mater. 2006, B136: 930-937, DOI: 10.1016/j.jhazmat.2006.01.033Uzun, I.; Guzel, F. Adsorption of Some Heavy Metal Ions from Aqueous Solution by Activated Carbon and Comparison of Percent Adsorption Result of Activated Carbon with those of Some Other Adsorbents. Turk. J. Chem. 2000, 24: 291-297.Zou, X.; Pan, J.; Ou, H.; Wang, X.;Guan, W.; Li, C.; Yan, Y.; Duan, Y. Adsorptive removal of Cr(III) and Fe(III) from aqueous solution by chitosan/attapulgite composites: Equilibrium, thermodynamics and kinetics. Chem. Eng. J. 2011, 167: 112-121, DOI: 10.1016/j.cej.2010.12.009 
SYNTHESIS AND PERFORMANCE TEST OF CO-EEGDMA AS A CARRIER IN PHENOL TRANSPORT USING POLYMER INCLUSION MEMBRANE Kiswandono, Agung Abadi
Jurnal Penelitian Saintek Vol 22, No 2: Oktober 2017
Publisher : Institute of Research and Community Services, Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (291.291 KB) | DOI: 10.21831/jps.v22i2.16857

Abstract

This study was aimed to synthesize the polymer as a carrier, i.e. copolymer (Eugenol-ethylene glycol dimethacrylate, EGDMA) or co-EEGDMA. The synthesis involving eugenol and EGDMA as a crosslinking agent was performed by polymerization using a boron trifl uoro diethyl ether catalyst. The synthesized polymer was then characterized using FTIR, SEM and H-NMR. Co-EEGDMA and two other compounds, namely polyvinyl chloride (PVC) and dibenzyl ether (DBE) as the components in the membrane making process were tested to be used for phenol transport. The components then were tested using Polymer Inclusion Membrane (PIM) method. The characterization results of co-EEGDMA show that eugenol polymerization using EGDMA crosslinking agent has been successfully synthesized. The results also show that the membrane containing the new compounds can be used for phenol transport in multiple times.
KAJIAN SPEKTRA FTIR PADA MEMBRAN KOPOLI (EUGENOL-DIVINILBENZENA), CO-EDVB SEBAGAI SENYAWA PEMBAWA UNTUK TRANSPOR FENOL Kiswandono, Agung Abadi; Girsang, Ermi; Pulungan, Ahmad Nasir; Sihombing, Juniva Laila; Siswanta, Dwi; Aprilita, Nurul Hidayat; Santosa, Sri Juari; Hayashita, Takashi
Prosiding SNPS (Seminar Nasional Pendidikan Sains) 2015: Prosiding SNPS (Seminar Nasional Pendidikan Sains)
Publisher : Universitas Sebelas Maret Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (33.496 KB)

Abstract

Telah dilakukan kajian transpor fenol melalui membran berbasis senyawa divinil benzena (DVB)tertaut silang dengan metode PIM.Kajian transpor fenol ini menggunakan chamber sebagai alat transpor yang memisahkan fasa sumber dan fasa penerima. Beberapa evaluasi yang mempengaruhi transpor menggunakan membran PIMtelah dilakukan diantaranya adalah uji stabilitas membran, umur membrandan pemakaian berulang kemudian membran PIM sebelum dan setelah transpor dikarakterisasi menggunakan FTIR. Hasil penelitian menunjukkan bahwa membran PIM yang mengandung senyawa tertaut silang co-EDVB ini, kecepatan pengadukan, jenis agen tertaut silang, konsentrasi plasticizer dan garam NaNO3 berpengaruh terhadap hilangnya komponen penyusun membran (ML loss). Berdasarkan hasil FT-IR, didapatkan bahwa membran yang mengandung senyawa pembawa dienaini, komponen penyusun membran yang hilang didominasi oleh senyawa pembawanya sedangkan indikasi hilangnya komponen penyusun membran dapat terlihat pada hasil FT-IR setelah digunakan untuk transpor, yakni hilangnya puncak ‒OH pada spektra FT-IR.
SERBUK BIJI SALAK (Salacca zalacca ) SEBAGAI BIOSORBEN DALAM MEMPERBAIKI KUALITAS MINYAK GORENG BEKAS Girsang, Ermi; Kiswandono, Agung Abadi; Aziz, Hermansyah; Chaidir, Zulkarnain; Zein, Rahmiana
Prosiding SNPS (Seminar Nasional Pendidikan Sains) 2015: Prosiding SNPS (Seminar Nasional Pendidikan Sains)
Publisher : Universitas Sebelas Maret Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (33.496 KB)

Abstract

Pemurnian minyak goreng bekas penggorengan ayam dan lele telah dilakukan dengan memanfaatkan biosorben serbuk biji salak (Salacca zalacca). Penelitian ini dilakukan dengan cara memasukkan serbuk salak ke dalam  minyak goreng bekas dengan beberapa variasi. Setelah itu serbuk biji salak sebelum dan sesudah perendaman dikarakterisasi menggunakan spektroskopi inframerah. Hasil penelitian menunjukkan bahwa dengan waktu perendaman selama dua minggu total kolesterol, trigliserida, MDA (Malondialdehydes), dan LDL (Low Density Lipoprotein)terendah terdapat pada berat biosorben serbuk biji salak 20 g yakni berturut-turut 109,88 mg/dL, 261,06 mg/dL, 7,91 nmol/mL, dan 17,1 mg/dL. Rendahnya nilai tersebut disebabkan karena sisi aktif pada biosorben berfungsi secara efektif dalam mengikat gugus fungsi yang terdapat pada minyak jelantah, hal ini juga diperkuat dengan spektra infrared. Gugus  hidroksil dan metil pada biosorben diduga berperan penting dalam pengikatan gugus-gugus fungsi pada minyak jelantah.
EVALUATION OF PHENOL TRANSPORT USING POLYMER INCLUSION MEMBRANE (PIM) WITH POLYEUGENOL AS A CARRIER Febriasari, Arifina; Siswanta, Dwi; Kiswandono, Agung Abadi; Aprilita, Nurul Hidayat
Jurnal Rekayasa Kimia & Lingkungan Vol 11, No 2 (2016): Jurnal Rekayasa Kimia & Lingkungan
Publisher : Chemical Engineering Department, Syiah Kuala University, Banda Aceh, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23955/rkl.v11i2.5112

Abstract

A recovery study of phenol with Polymer Inclusion Membranes (PIMs) needs to be evaluated to determine values of transport kinetic parameter, level of stability, and selectivity of the membrane. This paper describes results of the evaluation of phenol transport using PIMs with polyeugenol as a carrier. PIMs were made by mixing polyeugenol, dibenzylether, and polyvinylchloride in a solvent (tetrahydrofuran) then printed in a container with diameter 4.5 cm and allowed to vaporize for 72 hours. Further evaluation studies are conducted at pH 4.5 with various parameters, among of them are various times that were taken to identify parameters of the transport kinetics of phenol, membrane stability, characterization, and testing of membrane selectivity by comparing transport of phenol with another compound, in this study chromium is used. This study results in calculation of values of transport kinetics of membrane permeability obtained at 8.8 x 10-5 m/s, flux value of 9.512 x 10-4 g/m2s, and diffusion coefficient of 3.826 x 10-11 m2/s. Repeating use over three times, 48 hours, indicates reduction in power of phenol transport by 70.81%. While selectivity test indicates that membrane is used more selectively against phenol than chromium metal. Based on study results, phenol transport effectiveness using PIM with polyeugenol as carrier is 91.4% in optimum condition.
EXTENDING THE LIFE TIME OF POLYMER INCLUSION MEMBRANE CONTAINING COPOLY(EUGENOL-DVB) AS CARRIER FOR PHENOL TRANSPORT Kiswandono, Agung Abadi; Siswanta, Dwi; Aprilita, Nurul Hidayat; Santosa, Sri Juari; Hayashita, Takashi
Indonesian Journal of Chemistry Vol 13, No 3 (2013)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (844.034 KB) | DOI: 10.22146/ijc.21285

Abstract

A study of phenol transport was conducted in correlation to the evaluation of copoly(eugenol-divinylbenzene, DVB) as carrier using polymer inclusion membrane (PIM) method. The performance of copoly(eugenol-DVB) was observed based on the parameters of Membrane Liquid (ML) loss. Some variations, including the effect of plasticizer concentration, stirring speed, and measurement of lifetime of the membrane, were studied. Related to the lifetime, the effect of the concentration of NaNO3 salt was also studied. The tensile strength of membrane before and after the transport was measured and their morphology was characterized using SEM (Scanning Electron Microscope). Results of the study indicate that the value of the tensile strength of the membrane after the transport was lower than that before the transport. The lifetime of the membrane was not only depending on the capacity of the membrane in restraining ML loss, but also on the concentration of salt that was added to the solution of source phase. In addition, the lifetime of the membrane had correlation to the number of ML loss, i.e. the addition of salt lead to lower amount of ML loss and gave longer lifetime. With the addition of 0.1 M NaNO3, the lifetime of the membrane extended to 62 days, which is longer than the lifetime without the addition of NaO3 which was only 7 days.
TRANSPORT OF PHENOL THROUGH INCLUSION POLYMER MEMBRANE (PIM) USING COPOLY(EUGENOL-DVB) AS MEMBRANE CARRIERS Kiswandono, Agung Abadi; Siswanta, Dwi; Aprilita, Nurul Hidayat; Santosa, Sri Juari
Indonesian Journal of Chemistry Vol 12, No 2 (2012)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (704.82 KB) | DOI: 10.22146/ijc.21348

Abstract

Copoly(eugenol-DVB) with DVB composition of 2%, 6% and 12% had been prepared and characterized by FTIR spectroscopy. The copolymers were used as membrane carriers for the transport of phenol using the polymer inclusion membranes (PIM) based on polyvinylchloride (PVC) as membrane support. The experimental conditions for investigation of the transport of phenol through the membranes were pH of the source phase, NaOH concentration in the stripping phase, membrane thickness, phenol concentration and transport time. The results showed that the optimum condition for phenol transport was achieved on the membrane based on copoly(eugenol-DVB) 12% with the transport efficiency of 75.6% at pH of the source phase of 4.5, NaOH concentration of 0.25 M and transport time of 48 h. The reaction follows first order kinetics with mass transfer coefficient (k) of 1.02×10-5 m/s and permeability (Ps) of 8.5×10-6 m/s.
PERBANDINGAN DUA EKSTRAKSI YANG BERBEDA PADA DAUN KELOR (Moringa oleifera, lamk) TERHADAP RENDEMEN EKSTRAK DAN SENYAWA BIOAKTIF YANG DIHASILKAN Kiswandono, Agung Abadi
Jurnal Sains Natural Vol 1, No 1 (2011): Sains Natural
Publisher : Universitas Nusa Bangsa

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (187.701 KB) | DOI: 10.31938/jsn.v1i1.13

Abstract

Effect of Two Extract Methods on Content and Compound of Leaf of Kelor (Moringa oleifera, Lamk)            It had been studied to identify and compare bia active coumpound group and extract content that had been produced of kelor leaf (Moringa oleifera,Lamk) using maserasi extract method and reflux method with methanol and hexane solution respectively. The content produced by reflux with hexane solution was 11.406 % and with methanol was 12.806 %. The content produced by maseration with hexane was 9.976 % and with methanol was 11,863 %. Statistical analysis using T-Test resulted that reflux method and maseration method using hexane solution was significantly different in eror level 5 %, but by using methanol was not significanntly diferent in 5 % eror level. Phytochemistry test for leaf powder had bioactive compound of steroid,tanin, phenol hydroquinon and saponin. In methanol extract of reflux method had bioactive compound of alkaloid, phenolhydroquinon, flavonoid, steroid,triterpenoid, tanin,and saponin, while in maseration method was alcaloid, steroid,tanin,and saponin.Keywords : Moringa oleifera, reflux,maseration, bioactive, phytochemical ABSTRAK       Telah dilakukan penelitian dengan tujuan mengidentifikasi dan membandingkan golongan senyawa bioaktif dan rendemen ekstrak yang dihasilkan pada daun kelor (Moringa oleifera, Lamk) dengan metode ekstraksi maserasi dan refluks menggunakan pelarut heksana dan metanol 80%.  Rendemen yang dihasilkan dengan metode refluks menggunakan pelarut heksana adalah 11,406%  dan metode maserasi  9,976%, sedangkan dengan pelarut Metanol 80%, metode refluks 12,808% dan metode maserasi 11,863%.  Uji t antara metode refluks dan maserasi daun kelor menggunakan pelarut heksana berbeda nyata dan menggunakan pelarut metanol 80% tidak berbeda nyata pada taraf nyata 5%. Hasil uji fitokimia pada serbuk daun mengandung senyawa bioaktif steroid, tanin, fenol hidroquinon dan saponin. Pada ekstrak metanol 80%, metode refluks adalah golongan alkaloid, fenol hidrokuinon, flavonoid, steroid , triterpenoid, tanin, dan saponin sedangkan pada maserasi adalah golongan alkaloid, fenol hidrokuinon, flavonoid, steroid, tanin, dan saponin.Kata kunci : Moringa oleifera, refluks, maserasi, bioaktif, fitokimia.
STUDI TRANSPOR SENYAWA FENOL MENGGUNAKAN MEMBRAN CAIR POLIEUGENOL DENGAN PELARUT DIKLOROMETANA Maslahat, Mamay; Kiswandono, Agung Abadi
Jurnal Sains Natural Vol 1, No 2 (2011): Sains Natural
Publisher : Universitas Nusa Bangsa

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (377.836 KB) | DOI: 10.31938/jsn.v1i2.24

Abstract

Study on Phenol Compound Transport using Polieugenol Liquid Membrane with Dichloromrthane Solven         Phenol is a component in waste water that is very dangerous, because it is toxic, corosif on skins and carcinogenics. It can be separated by using liquid membranes. Membrane can be a very specific filter. Liquid membrans transport technique used three phase. The phase are donor phase that contain substance to be separated, membrane phase that contains ligan in the organic solvents,  and aceptore phase that contain base as release agent of ligans complex. Polyeugenol have a condition as a ligan that is capable as selective chelate agent for phenol coumpounds. In this research, polieugenol were used with dichloromethane solvents as a membrane for separating and transporting phenol separated, NaOH as release phase with variating pHs, concentrations of release phase, transport time and membrane concentrations. The result showed that liquid membrane of polieugenol in dichloromethane solvent can transport phenol at source phase pH 6.5, at optimum released concentration  was 0.75 M, optimum transport times was 72 hours, and optimum membran concentrations was 1,5×10-3 with % transport was 65.2%.Keywords : Liquid membrane, polyeugenol, dichlorometane, phenol ABSTRAK        Fenol merupakan salah satu komponen dalam air limbah yang sangat berbahaya, karena beracun dan bersifat korosif terhadap kulit serta  karsinogenik. Fenol dapat dipisahkan dengan menggunakan  membran cair. Membran dapat bertindak sebagai filter yang sangat spesifik. Teknik transpor membran cair melibatkan tiga fasa yaitu fasa donor,  mengandung bahan yang akan dipisahkan, fasa membran berisi ligan dalam pelarut organik dan fasa akseptor yang berisi basa sebagai agen pelepas  dari kompleks ligan.Polieugenol mempunyai syarat sebagai ligan sehingga mampu berfungsi sebagai agen pengkhelat yang selektif untuk senyawa fenol. Pada penelitian ini digunakan polieugenol dengan pelarut diklorometana sebagai membran  untuk pemisahan dan transpor senyawa fenol, dan  NaOH sebagai fasa pelucut dengan memvariasikan pH, konsentrasi fasa pelucut, waktu transpor dan konsentrasi membran. Hasil penelitian menunjukan bahwa  membran cair polieugenol dalam pelarut diklorometana dapat mentranspor fenol pada pH fasa sumber optimum 6,5, pada konsentrasi pelucut optimum 0,75 M, waktu transpor optimum 72 jam, dan pada konsentrasi membran optimum 1,5×10-3 dengan % transpor 65,2%.Kata kunci : membran cair, polieugenol, diklorometana, fenol
UJI ANTIOKSIDAN EKSTRAK HEKSANA, ETIL ASETAT, ETANOL, METANOL 80% DAN AIR DAUN KELOR (Moringa oleifera, Lamk) Kiswandono, Agung Abadi; Maslahat, Mamay
Jurnal Sains Natural Vol 1, No 1 (2011): Sains Natural
Publisher : Universitas Nusa Bangsa

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (142.124 KB) | DOI: 10.31938/jsn.v1i1.11

Abstract

Antioxidant Test of  Hexane, Etil Asetat, Ethanol, Methanol 80% and   Water Extract in Moringa oleifera           Antioxidant is a substance that can protect a materials from its destruction. Sources of antioxidant could be from plants. Alkaloid compounds in the Moringa oleifera leaves have  potential  antioxidant source. This research aimed  to examine antioxidant potential from Moringa oleifera leaves extract of hexane, ethyl acetate, methanol 80% and water .   The extraction methodes was meseration, and antioxidant test used the DPPH free radical scavenging effect. The  result showed that extract ethanol had the best potential antioxidant with the value of 118.19 µg/mL and R2 was 99.9%, from hexanes was 692.39 µg/mL (R2=99.9%), in ethyl acetate was 247.5 µg/mL (R2=99.9%), in methanol 80% was  121.79 µg/mL (R2= 0.998) and in water extract 189.21 µg/mL (R2=99.8%). Antioxidant standart as kuersetin that gave value of 15.84 µg/mL (R2 = 99.9%).Keywords : Bioactives compound, moringa oleifera,  antioxidant ABSTRAK          Antioksidan merupakan substansi yang dapat mencegah atau memperlambat kerusakan suatu zat. Sumber antioksidan dapat diperoleh dari suatu tumbuhan. Senyawa alkaloid yang terdapat pada daun kelor berpotensi sebagai sumber antioksidan. Penelitian ini  bertujuan menguji antioksidan ekstrak heksana, etil asetat, etanol, metanol 80% dan air pada daun kelor (Moringa oleifera, Lamk). Penelitian dilakukan dengan menggunakan metode maserasi dan uji antioksidan menggunakan metode ”DPPH free radical scavenging effect”. Hasil uji antioksidan terbaik terdapat pada ekstrak etanol, yaitu sebesar 118.19 µg/mL dengan harga R2 sebesar 99.9%, sedangkan pelarut yang lain, yaitu pelarut heksana sebesar 692.39 µg/mL (R2=99.9%), etil asetat 247.5 µg/mL (R2=99.9%), metanol 80% 121.79 µg/mL (R2= 0.998) dan air 189.21 µg/mL (R2=99.8%), sebagai pembanding antioksidan digunakan kuersetin, yaitu 15.84 µg/mL (R2= 99.9%).Kata kunci : Senyawa bioaktif, moringa oleifera,  antioksidan