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Abram, Paulus Hengky
Universitas Tadulako

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Pembuatan Etanol dari Buah Salak (Salacca zalacca) Melalui Proses Fermentasi Wartini, Ni Ketut; Abram, Paulus Hengky; Rahman, Nurdin
Jurnal Akademika Kimia Vol 6, No 4 (2017)
Publisher : Universitas Tadulako

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (819.479 KB) | DOI: 10.22487/j24775185.2017.v6.i4.9455

Abstract

The study aimed to determine the level of ethanol that produced by the flesh of salak fruits with the fermentation process. The method used was an experimental method. The technical is fermentation, with tape yeast starter, determination of ethanol and purification. Ethanol level in the flesh of fresh fruits without handling was 11.3%, the highest levels of ethanol in the fruit flesh of 4 days after the plucking was 7.6%, and the fruit flesh of 7 days after the plucking was 3.4%. 
Ekstraksi Ion Merkuri MenggunakanTeknik Emulsi Membran Cair dengan Variasi Konsentrasi Benzoil Aseton dalam Fasa Membran dan Variasi pH Fasa Eksternal Sulniawati, Sulniawati; Hamzah, Baharuddin; Abram, Paulus Hengky
Jurnal Akademika Kimia Vol 6, No 4 (2017)
Publisher : Universitas Tadulako

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (713.546 KB) | DOI: 10.22487/j24775185.2017.v6.i4.9454

Abstract

Mercury ion extraction using the liquid membrane emulsion technique with the variation of benzoil aseton concentration in membrane phase and variation of pH of external phase has been done. The sample containing Hg2+ ions with a concentration of 20 mg/L. Variation of benzoil aseton were concentration of 0.01 M, 0.015 M, 0.02 M and 0.025 M, whereas variation of external phase pH used were 1,5; 2; 2,5; 3 and 3,5. The measurement of extraction was conducted by using UV-Vis spectrophotometer. The results showed that the largest percent extraction on the extraction of mercury ions in solution by using liquid membrane emulsion was at a concentration of benzoil aseton 0.02 M with the percentage of extraction 79.33% and the pH external phase 2 with the percentage of extraction 85.30%.
Penentuan Waktu Optimum Dalam Pembuatan Bioetanol Dari Bonggol Pisang Tanduk(Musa paradisiaca formatypisa) Melalui Fermentasi Setiawati, Eka Lilis; Gonggo, Siang Tandi; Abram, Paulus Hengky
Jurnal Akademika Kimia Vol 5, No 3 (2016)
Publisher : Universitas Tadulako

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (412.853 KB) | DOI: 10.22487/j24775185.2016.v5.i3.8044

Abstract

Banana tuber contains 76% starch as a source of organic material that can be changed to bioethanol which is an alternative of fuel oil. This study aimed to determine the optimum time of fermentation in the process of producing bioethanol from banana (musa paradisiaca formatypisa) tuber. In this study the fermentation of banana tuber is determined using saccharomyces cereviseae with the variation time of 3, 4, 5, 6, 7, 8 and 10 days. The stages carried out in this study were preliminary or sample preparation, delignification, hydrolysis, fermentation and separation. Bioethanol from the fermented ricestraw was analyzed using alcoholmeter. The content of bioethanol product increased on days 3 to 7 and reach the optimum on the day 7 which was 8.90%, where on the day 8 and 10 decreased the ethanol content.
Uji Efektivitas Ekstrak Daun Sambiloto (A. Paniculata [burm.F] ness) Sebagai Bahan Pengawet Alami Tomat Dan Cabai Merah Pusung, Widya Astuti; Abram, Paulus Hengky; Gonggo, Siang Tandi
Jurnal Akademika Kimia Vol 5, No 3 (2016)
Publisher : Universitas Tadulako

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (537.531 KB) | DOI: 10.22487/j24775185.2016.v5.i3.8049

Abstract

Preservation synthetically or naturally is intended to extend the storability of tomato and red chili. Sambiloto (A. paniculata [Burm.f] Nees) is containing saponins that has anti-bacterial properties, therefore can be used as a preservative. The aim of this study was to investigate whether the extract of sambiloto leaf can be used as a natural preservative for tomato and red chili, and to determine the concentration of extract of sambiloto leaf which was effectively used as the preservative. The method used in this study was maceration to produce extract and iodometric titration to determine the levels of vitamin C before and after preservation. The results showed that the pickling tomatoes and red chili using extract of sambiloto leaf with a concentration of 6% sustained tomates up to 9 days and red chilies up to 11 days. Level of vitamin C contained in tomato was decreasing from 39.9 mg/100g to 37.54 mg/100g of material while red chilli is decreasing from 79.78 mg/100g to 72.74 mg/100g of material.
Bioetanol dari Limbah Kulit Singkong (Manihot Esculenta Crantz) Melalui Proses Fermentasi Erna, Erna; Said, Irwan; Abram, Paulus Hengky
Jurnal Akademika Kimia Vol 5, No 3 (2016)
Publisher : Universitas Tadulako

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (458.663 KB) | DOI: 10.22487/j24775185.2016.v5.i3.8045

Abstract

Carbohydrates can be obtained from tubers such as cassava. Cassava is a plant from family euphorbiaceae and typical tropical plants. Cassava peel is a major waste that contains carbohydrates. The peel of cassava can be used as an energy source, namely ethanol.The purpose of this study is to determine the contents of ethanol through the fermentation process of cassava peel where obtainable from Malino village, Batu Daka West, Tojo Una-Una. The parameters in this study was content of ethanol that was obtained by fermentation using saccaromyces cerevisiae yeast. The fermentation process was conducted by varying day of fermentation, 4, 6, 8, and 10 days. The results showed the fermentation of ethanol with time variation respectively is 4.50, 5.20, 6.00 and 4.00%. In conclusion, it can be said that the highest ethanol content is 6.00% with the fermentation time of 8 days.
Uji Efektivitas Ekstrak Tanaman Putri Malu (mimosa pudica linn) Sebagai Bahan Pengawet Alami Tomat Fadlian, Fadlian; Hamzah, Baharuddin; Abram, Paulus Hengky
Jurnal Akademika Kimia Vol 5, No 4 (2016)
Publisher : Universitas Tadulako

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (367.012 KB) | DOI: 10.22487/j24775185.2016.v5.i4.8063

Abstract

Putri malu plant (mimosa pudica Linn) is known to contain saponin which is antibacterial compounds that can be used as a preservative. This study aims to prove whether the putri malu extracts can be used as a natural preservative for tomato and to determine the concentration of putri malu extracts to preserve tomatoes. The extraction method used was maceration and iodimetric titration to determine the levels of vitamin C before and after preservation. The results showed that the putri malu extract can be used as a natural preservative for tomatoes and the most effective concetration in preserving tomatoes was of 6%, that was for 11 days. At this level of concentration vitamin C showed the smallest value among others concentration where it decreased from 36.373 mg/100 g into 34.613 mg/100 g of material.
Penggunaan Gel Lidah Buaya (Aloe vera) Sebagai Koagulan Alami Dalam Penjernihan Air Sumur Di Desa Sausu Tambu Kecamatan Sausu Mujariah, Mujariah; Abram, Paulus Hengky; Jura, Minarni Rama
Jurnal Akademika Kimia Vol 5, No 1 (2016)
Publisher : Universitas Tadulako

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (373.83 KB) | DOI: 10.22487/j24775185.2016.v5.i1.7995

Abstract

Research on the use of aloe vera gel (aloe vera) as a natural coagulant in water purification village wells Sausu Tambu has been done. This study aims to determine whether aloe vera gel can be used as a natural coagulant and determine the optimum ratio of aloe vera gel in water (V/V) which is used in the purification of water wells in the village Sausu Tambu. Research was conducted on the water sample preparation, natural production of aloe vera gel, water treatment and analysis of water quality parameters, namely turbidity, hardness, color, pH and temperature. The results showed that aloe vera gel can be used as a coagulant to purify the water with an optimum ratio of 0.3 mL aloe vera gel in 500 mL water sample. Aloe vera gel can reduce 72.22% of turbidity, 63.48% hardness, 68.62% color with a pH of 5.5 and a temperature of 30 oC. It can be concluded that the aloe vera gel has the ability as a coagulant to purify water.
Pemanfaatan Biomassa Serbuk Gergaji Sebagai Penyerap Logam Timbal Intan, Dey; Said, Irwan; Abram, Paulus Hengky
Jurnal Akademika Kimia Vol 5, No 4 (2016)
Publisher : Universitas Tadulako

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (423.315 KB) | DOI: 10.22487/j24775185.2016.v5.i4.8065

Abstract

Lead (Pb) is one kind of heavy metal that has high level of toxicity. One way to reduce the level of Pb is by adsorption using cellulose and lignin of sawdust. The aim of this study is to determine the optimum pH, the optimum weight and to determine the adsorption capacity of sawdust when it absorbs Pb in solution of Pb(NO3)2. The adsorption process is carried out by using the various pH of 3, 4, 5, 6, 7, and 8 with a weight of 100 mg, and then the various weight of 100, 200, 300, 400, and 500 mg with the pH optimum. The analysis of Pb content in the solution was conducted by Spectro-direct. The analysis result shows the determination of pH occured at pH 7, Pb absorbed is 14.89 mg/g, and the percentage of Pb absorbed was 96.97%. For the determination of 400 mg of the adsorbent weight of Pb absorbed was 3,83 mg/g, the adsorption percentage of Pb was 99.98%, and the optimum adsorption for optimum weight was 0.15 mg Pb/mg sawdust.
Analisis Kandungan Nitrogen (N) dan Posforus (P) pada Limbah Jeroan Ikan Mujair (Oreochromis mosambicus) Danau Lindu Hildawianti, Hildawianti; Tiwow, Vanny M. A.; Abram, Paulus Hengky
Jurnal Akademika Kimia Vol 6, No 3 (2017)
Publisher : Universitas Tadulako

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (147.989 KB) | DOI: 10.22487/j24775185.2017.v6.i3.9425

Abstract

An effort to minimize the environmental pollution is using that waste as a base material of organic fertilizer. This study was conducted to determine the levels of Nitrogen (N) and phosphorous (P) contained in the offal waste of mujair fish (Oreochromis mosambicus) from Lindu lake. Samples of mujair offal waste were taken from fish saler on the street Towua, Palu. Analysis of Nitrogen levels usedKjeldhal method which consists of three phases, namely destruction, distillation, and titration. On the other hand, for Phosphorus analysis was using wet digestion method, followed by absorbance measurements of samples with spectronic 20 at a wavelength of 720 nm. Based on the analysis, the average of nitrogen (N) levels in mujair offal waste was 2.78%, while the average of phosphorus (P) levels was 2.48%. From these results, it is known that mujair offal waste contains more nitrogen (N) compared to phosphorous (P). In addition, when compared to the quality standard liquid organic fertilizer N and P content in mujair offal almost meets the quality standard liquid fertilizer, where the minimum technical requirements of organic liquid fertilizer should contain a total N content of 3-6% and 3-6% P2O5.