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Adsorpsi Karbon Aktif dari Sabut Kelapa (Cocos Nucifera) Terhadap Penurunan Fenol Astriah Abdullah; Asri Saleh; Iin Novianty
Al-Kimia Vol 1 No 2 (2013): December
Publisher : Study Program of Chemistry - Alauddin State Islamic University of Makassar

Coconut coir can be used as an activated carbon for phenol removal, because of carbon element which is containing in Coconut coir make it to own a potency as an activated carbon. Research on activated carbon adsorption of phenol to the decline of coconut coir (Cocos nucivera) has been performed. This study begins with the dehydration and carbonization stage. Coconut coir activated carbon with 3 activator namely sulfuric acid (H2SO4), sodium hydroxide (NaOH) and zinc chloride (ZnCl2). Coconut coir activated carbon in this study using a variable dose of 500 mg carbon, 1000 mg and 1500 mg. This study aimed to determine the characteristics of the water content, the adsorption capacity of phenol on activated carbon from coconut husk carbon activation results and determine the maximum adsorption capacity of activated carbon from coconut husk carbon in the adsorption of phenol. Activators most good at absorbing phenol is sodium hydroxide (NaOH) with the absorption efficiency of 93.01% at a mass of 1.5 g.

Identifikasi dan Karakterisasi Senyawa Bioaktif Antikanker dari Ekstrak Etanol Kulit Batang Kayu Bitti (Vitex cofassus) Nuraini Nuraini; Asriani Ilyas; Iin Novianty
Al-Kimia Vol 3 No 2 (2015): December
Publisher : Study Program of Chemistry - Alauddin State Islamic University of Makassar

Bitti wood (Vitex cofassus) is one of the plants in Verbenaceae family and known by the people of South Sulawesi as the building material. The aims of this research is to identify and characterize the anticancer bioactive compound in ethanol extract of vortex Bitti wood (Vitex cofassus) and to determine the bioactivity value. This research uses extraction and fraction method, identification uses thin layer chromatography (TLC) and phytochemical test to know metabolism secunder and characterization with FTIR. The result from isolation shows that the amorf shape with 18 mg has white and yellow colour. The purification is conduted by using spectroscopy test FTIR. The result shows that the crystal has flavonoids compound which is solid with phytochemical test like positive product by using FeCl3 5%, NaOH 10% and H2SO4 P. Thick extract, fraction combination and amorf continued with toxicity test with the animal test Artemia salina Leach it uses Brine Shrimp Lethality test (BST) method. LC50 value which is gotten the three samples is thick extract 29,51 ppm, combination fraction 169,82 ppm and amorf 562,34 ppm.

Kinetika Biodegradasi Limbah Minyak Bumi Menggunakan Biokompos Wa Nirmala Wa Nirmala; Asri Saleh; Iin Novianty
Al-Kimia Vol 3 No 2 (2015): December
Publisher : Study Program of Chemistry - Alauddin State Islamic University of Makassar

Kinetic study of the biodegradation petroleum waste by using biocompost was conducted to determine the concentrations of Total Petroleum Hydrocarbons (TPH) decline. It can be seen from the reaction kinetics of biodegradability by calculating the rate constant and reaction order of biodegradation of the petroleum waste. Otherwise it can be seen also from the activity of enzymes involved in the biodegradation namely enzymatic kinetics by measuring the value of Km and Vmax. Research methods are mixing biocompost and petroleum waste, measurement of pH, water content and determining the concentration of TPH at day 0, 7, 14, 21, 28 and 35. The concentrations of TPH before and after biodegradation are 11.23% and 0.54%. The results show biodegradation by using biocompost can decrease the Total Petroleum Hydrocarbons up to 95.19% within 35 days. The degradation rate is 0.502% per day while the rate constant is 0.0847 which relevant to the first-order reaction rate. The reaction kinetics of biodegradation by oxygenase enzyme show Vmax and Km value as 0.0834 and -0.9920, respectively.

Analisis Antioksidan Ekstrak Etil Asetat Kulit Buah Manggis (Garcinia mangostana L.) Dengan Metode Dpph (1,1difenil-2-pikrilhidrazil) Dewi Sartika; St Chadijah; Iin Novianty
Al-Kimia Vol 3 No 2 (2015): December
Publisher : Study Program of Chemistry - Alauddin State Islamic University of Makassar

Mangosteen fruit (Garcinia mangostana L.) is a potential source of natural antioxidant. This research can be seen through comparison of the effect of the solvent ethyl acetate for extract mangosteen rind (garcinia mangostana L.) the optimal antioxidant substances for withdrawal. Method used is maceration extraction using methanol and liquid phase using three variable 1:3, 1:4 and 1:5. The test Includes a qualitative and quantitative test of antioxidant. The results of the qualitative test show the presence of antioxidant in the yellow extract of mangosteen rind which turn purple discoloration on color test and the emergence of patches of yellow with purple backgroud on TLC when sprayed solution of DPPH 40 ppm. Then quatitativ test retrieved % high curbs in comparison 1:3.

Analisis Kualitas Briket Serbuk Gergaji Kayu Dengan Penambahan Tempurung Kelapa Sebagai Bahan Bakar Alternatif Asri Saleh; Iin Novianty; Suci Murni; Andi Nurrahma
Al-Kimia Vol 5 No 1 (2017): June
Publisher : Study Program of Chemistry - Alauddin State Islamic University of Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24252/al-kimia.v5i1.2845

Increasing fuel and liquid gas prices make this energy source is no longer cheap. Therefore, it is necessary to create an alternative energy resource that can be used to replace the role of fuel and gas. Waste sawdust and coconut shell has a huge potential that can be used as raw material charcoal briquettes. The purpose of this research is to improve the quality of sawdust briquettes with the addition of coconut shell charcoal. To improve the quality of charcoal briquettes, the addition of coconut shell charcoal with a variation of 20%, 30%, 40%, 50% and 60% of the weight of sawdust briquette charcoal. Authoring process is done by burning coconut shells directly and roasting methods to sawdust. Adhesives are used as much as 50%. The calorific value generated in sawdust briquettes with materials: coconut shell at a concentration of 100% is 5622.7769 cal/gram, a concentration of 80: 20% is 6504.67785 cal/gram, the concentration of 70: 30% is 6624.09305 cal/gram, the concentration of 60: 40% is 7017.5178 cal/gram, a concentration of 50: 50% is 7288.7523 cal/gram and 40: 60% is 7386.4805 cal/gram. Overall, the quality of sawdust briquettes with palm shell charcoal is quite good, so it can be used as an alternative fuel

Produksi Etil Ester Dari Minyak Dedak Padi (Oryza Sativa) Menggunakan Reaktor Ultrasonik Aisyah Aisyah; Riskayanti Riskayanti; Iin Novianty; Asriyani Ilyas; Sjamsiah Sjamsiah; Sitti Chadijah
Al-Kimia Vol 6 No 1 (2018): JUNE
Publisher : Study Program of Chemistry - Alauddin State Islamic University of Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24252/al-kimia.v6i1.3036

Indonesia as the third largest grain producer in the world produces large amounts of bran. High contain Free Fatty Acid (FFA) in rice bran oil causes it can be converted into the fatty acid ethyl esters (biodiesel) by esterification and transesterification methods. The rice bran oil was obtained by rice bran extraction using n-hexane. The esterification process was catalyzed by HCl. In this study, the transesterification process to convert triglycerides into ethyl esters (biodiesel) was conducted by the addition of KOH as a neutralizer and a catalyst Oil and ethanol by ratio 1:6 using 0,5% KOH as catalysator were reacted by utilizing 47 kHz ultrasonic wave for 45, 60 and 75 minutes. Biodiesel conversion value obtained were 49,23%; 70,55% and 52,04% respectively. Biodiesel product spectrum was analyzed using FTIR and GCMS instrument. The density, viscosity and flash point is also measured. FTIR analysis on all variations give similar data spectrum, where the ethyl ester products are characterized by typical bands at specific frequencies such as -C=O; -C-C; -C-H (sp3) and = C-H (sp2) stretch. Based on the data from GCMS spectrum, the product components are ethyl palmitate, ethyl linoleate, ethyl stearate and ethyl oleate.

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