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ITS » Paper and Presentation » Kimia
Posted by anisw@its.ac.id at 20/05/2016 11:14:29  •  709 Views


KETONE AND ACID BIOMARKERS OF MIOCENE COAL FROM PIT INUL SANGATTA EAST KALIMANTAN

BIOMARKA KETON DAN ASAM BATUBARA MIOSEN DARI PIT INUL SANGATTA KALIMANTAN TIMUR

Author :
KUSUMA, HENDRA SISWANTO ( 1410100043 )




ABSTRAK

Batubara dari Pit Inul Sangatta Kalimantan Timur terbentuk dari zaman Miosen termasuk dalam klasifikasi batubara muda. Karakter geokimia organik biomarka memberikan informasi kondisi batubara untuk pemanfaatan lebih lanjut. Batubara diekstraksi dengan pelarut diklorometanametanol 937. Ekstrak bitumen yang diperoleh difraksinasi dengan kromatografi kolom untuk mendapatkan fraksi netral dan asam. Fraksi netral difraksinasi kembali dengan kromatografi lapis tipis KLT untuk memperoleh senyawa keton. Komponen fraksi keton diidentifikasi sebagai n-nonadekan-2-on dan 15-sikloheksil-pentadeka-2-on yang diperkirakan hasil oksidasi dan siklisasi senyawa n-alkana oleh mikroba. Selain itu diidentifikasi juga keberadaan senyawa keton turunan amirin berupa olean-1318-en-3-on 945-amiron dan 946-amiron yang banyak ditemukan pada tumbuhan darat tingkat tinggi. Fraksi asam dianalisa dengan kromatografi gas-spektrometri massa KG-SM sebagai turunan metil ester. Biomarka asam diidentifikasi berupa karboksilat rantai panjang C18-C30 yang didominasi oleh rantai karbon beratom genap terhadap ganjil yang menggambarkan sumber bahan organik berasal dari tanaman tingkat tinggi. Diidentifikasi juga metil monoester bercabang dengan rantai karbon menengah C12-C18 dan asam aromatik menandakan adanya kontribusi dari bakteri. Asam 34-seco-friedelan-3-oat yang teridentifikasi pada sampel menunjukkan kondisi lingkungan pengendapan oksidatif. Batubara Miosen dari Pit Inul Sangatta Kalimantan Timur diperkirakan terbentuk dari tumbuhan darat dan keterlibatan bakteri selama proses diagenesis dengan kondisi lingkungan pengendapan cenderung bersifat oksidatif.


ABSTRACT

Lignite from Pit Inul Sangatta East Kalimantan was formed during Miocene. Organic geochemical character biomarker can give information about coal descriptions for further utilization. Coal was extracted with dichloromethane methanol 937 as a solvent. Bitumen extracts was fractionated by column chromatography to obtain neutral and acid fractions. Neutral fraction was further fractionated by thin layer chromatography TLC to obtain ketones. Components of the ketone fraction identified as n-nonadecan-2-one and 15-cyclohexyl-pentadeca-2-one expected from oxidation and cyclization of n-alkane by microbes. In addition olean-1318-en-3-one and fridelan-3-one are present that inform the coal derive from terrestrial higher plants in oxic condition. Acid fraction was analyzed by gas chromatography-mass spectrometry GC-MS as methyl ester derivatives. Acid biomarkers identified in the form of normal methyl ester and branched methyl ester. Normal methyl esters C16-C30 are dominated by even over odd carbon atom number that describes source of organic matters from higher plants. Methyl monoester with intermediate carbon chain C12-C18 and aromatic carboxylic indicates contribution of bacteria. The precence of metil 34-seco-fridelan-3-oic in studied sample shows the coal derive from terrestrial higher plants in oxidative depositional environment. Miocene coal from Pit Inul Sangatta East Kalimantan was derived from terrestrial higher plants and involvement of bacteria during diagenesis in oxidative depositional environment.



Keywordsbatubara Miosen; biomarka; fraksi asam; fraksi keton; kromatografi
 
Subject:  None
Contributor
  1. Prof. Dr. R.Y. Perry Burhan, M.Sc
  2. Dra. Yulfi Zetra, M.S
Date Create: 29/01/2015
Type: Text
Format: pdf
Language: Indonesian
Identifier: ITS-paper-14121160008976
Collection ID: 14121160008976
Call Number: RSKi 662.662 4 Kus b


Source
Paper and Presentations, Chemistry, RSKi 662.662 4 Kus b, 2015

Coverage
ITS Community

Rights
Copyright @2016 by ITS Library. This publication is protected by copyright and per obtained from the ITS Library prior to any prohibited reproduction, storage in a re transmission in any form or by any means, electronic, mechanical, photocopying, reco For information regarding permission(s), write to ITS Library




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  1.  ITS-paper-41580-1410100043-Paper.pdf - 542 KB
  2.  ITS-paper-41580-1410100043-Presentation.pdf - 1104 KB




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