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Ola, Pius D.
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USE OF SEQUENT ADSORPTION WITH ACTIVATED NATURAL ZEOLITE AND ACTIVATED CHARCOAL AS ADSORBENT TO IMPROVE THE QUALITY OF WASTE COOKING OIL Ola, Pius D.; Taus, Elisabeth
Chemistry Notes Vol 5 No 1 (2023): Chem Notes 2023, 5(1)
Publisher : Universitas Nusa Cendana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35508/cn.v2i2.3268

Abstract

Cooking oil which is exposed to high temperatures of up to 200 °C during the cooking process, leads to the formation of hazardous substances that are potentially dangerous to human health. However, people sometimes use the same cooking oil repeatedly without considering the negative effects that it causes. In this work, we investigated the use of two different types of adsorbent namely activated charcoal and activated zeolite sequentially to improve the quality of waste cooking oil (WCO) using the adsorption method. It was found that for 30 mL of WCO, the optimum dose of adsorbent was 7.5 g and the optimum contact time was 20 minutes. When these two types of adsorbent were applied sequentially for the purification of WCO at the optimum conditions, the result obtained indicated the lower value of the acid number, peroxide number, viscosity, and water content, compared to the WCO that treated only with a single type of adsorbent.
DETERMINATION OF TOTAL TANIN CONTENTS OF Terminalia Catappa, L. LEAF EXTRACT AND TEST OF ITS ABILITY AS A COMPLEXION AGENT OF Fe (III) Ola, Pius D.; Sandri, Mariana I.; Ola, Antonius R. B.; Kadang, Luther
Chemistry Notes Vol 2 No 2 (2020): Chem. Notes 2020, 2(2)
Publisher : Universitas Nusa Cendana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35508/cn.v2i2.3361

Abstract

A study of the essential oil content in basil (Ocimum sanctum) and red lemongrass (Cymbopogon nardus L. Rendle) originally grown in Flores island has been conducted. The purpose of this study was to identify the chemotype of the essential oils obtained over stahl distillation using GC-MS. The Ocimum mainly consisted of 55% eugenol following by minor trans-alfa-bergometena, patchulana, and linalool. Meanwhile, the chemotype of the red lemongrass (Cymbopogon nardus L. rendle) were citronellol (22%), citronella, cyclohexamethanol, and viridiflorol.
Spectrophotometrically Determination of Fe(III) in Manganese Processing Waste Water with Ethanol Extract of Terminalia catappa L. Leaves as a Complexing Agent Ola, Pius D.; Beti, Milce Y.; Wogo, Hermania Em; Darmakusuma, Dodi
Chemistry Notes Vol 3 No (1) (2021): Chem. Notes 2021, 3(1)
Publisher : Universitas Nusa Cendana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35508/cn.v3i(1).4711

Abstract

Chemical analysis, including metal ions determination using the spectrophotometry method, involves using a complexing agent, mostly produced by chemical industries, reacting with the analyte to form a colored compound. The very high cost and the environmentally unfriendly are the main disadvantages of that complexing agent. The use of a complexing agent categorized as a “green” chemical is critical to overcoming those shortcomings. In this work, extract ethanol of Terminalia catappa L. leaves was employed as a complexing agent in the determination of Fe(III) from aqueous media using the spectrophotometry method. The value of correlation coefficient (r) 0.993, obtained from the calibration curve, indicated that ethanol extract of Terminalia catappa L. leaves could be applied as a complexing agent for determining Fe(III) from aqueous media using the spectrophotometry method. By comparing this complexing agent with the commonly used complexing agent of Fe(III) viz KSCN, it was found that these two complexing agents did not differ significantly in the term of precision. Unlike precision, the accuracy obtained from these two complexing agents still differs significantly. When both complexing agents were applied in the determination of Fe(III) in manganese processing waste water, we found the concentration of Fe(III) was 0.009 ppm (ethanol extract as complexing agent) and 0.0076 ppm (KSCN as complexing agent). It is recommended to purify the extract before using it as a complexing agent for Fe(III) determination.
EKSTRAK AIR BIJI PINANG (Areca Catechu L.) SEBAGAI PENGOMPLEKS UNTUK ANALISIS Fe (III) MENGGUNAKAN METODE PENCITRAAN DIGITAL Ola, Pius D.; baun, Duwita N.; Lapailaka, Titus
Chemistry Notes Vol 6 No 2 (2024): Chem. Notes, 6(2), 2024
Publisher : Universitas Nusa Cendana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35508/cn.v4i2.9409

Abstract

A Research has been carried out on the utilization of areca seed aqueous extract as a complex for the analysis of iron(III) in aqueous media using digital imaging methods. In this study, the content of secondary metabolites in aqueous extract of areca nut was first determined, then an evaluation of performance parameters was carried out by analyzing iron(III) with aqueous extract of areca nut as the complexing agent, which was preceded by determining some of the optimum conditions for the formation of a complex between aqueous extract of areca nut–Fe (III). Areca seed water extract was then determined as an alternative reagent to determine the concentration of Fe(III) in real water samples using digital imaging by comparing this reagent with the standard KSCN reagent as the complexing agent. The results obtained showed that the correlation coefficient of areca seed water extract as complexing was 0.9741, which means that this method or reagent can be used as complexing agent for Fe(III) analysis in water. By comparing the extract and KSCN as a complex, it was found that the precision and accuracy of the two reagents were not significantly different in terms of precision but significantly different in terms of accuracy. When the areca seed water extract was applied to analyze Fe(III) in PDAM water and well water, % recovery was is still low and does not meet the % recovery requirements. This low recovery result indicates the amount of interfering substances in the water sample.
Penurunan Kadar Kekeruhan, BOD, dan COD Pada Limbah Laundry Menggunakan Biosorben Arang Eceng Gondok (Eichhornia crassipes) Ngana, Mersi N.; Suwari, Suwari; Ola, Pius D.
Chemistry Notes Vol 4 No 2 (2022): Chem. Notes 2022, 4 (2)
Publisher : Universitas Nusa Cendana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35508/cn.v4i2.9532

Abstract

Abstract Research has been carried out with the title of reducing turbidity, BOD, and COD levels in laundry waste using water hyacinth charcoal biosorbent which aims to determine the surface area of water hyacinth charcoal biosorbent on reducing turbidity, BOD, and COD in laundry waste using water hyacinth charcoal biosorbent, knowing the effect of water hyacinth charcoal biosorbent contact time on decreasing turbidity, BOD, and COD in laundry waste, and knowing the effect of water hyacinth charcoal biosorbent on decreasing turbidity, BOD, and COD in laundry waste. The adsorbent used was water hyacinth (Eichhornia crassipes). Water hyacinth adsorbents is a plant used as a cleaning agent in waters polluted by heavy metals, reducing the movement of organic waste so asto to facilitate sedimention. The water hyacinth charcoal adsorbent functions as an adsorbent, where the adsorbents functions to control wastewater pollution. The adsorption used was water hyacinth (Eichhornia crassipes). Water hyacinth adsorbents in reducing turbidity, BOD, and COD are surface area, time variation and adsorbents mass. Final results the highest level of water hyacinth adsorbent surface area of 44.0754 m2 /g occurred at a contact time of 60 minutes. The final results of water hyacinth adsorbent contact time between laundry waste, the hihghest decrease in turbidity level of 47.52 % occurred in 30 minutes, the highest decrease in BOD contect of 80.04 % occurred in contact time of 60 minutes, and the highest decrease in COD was 38.70 % occurred at a contact time of 120 minutes. The final results of the water hyacinth adsorbent mass between laundry wastes, the highest decrease in turbidity content of 47.27 % occurred in 3 gram mass, the highest decrease in BOD contect was 80.04 % occurred in 6 gram mass, and the highest decrease in COD content was 37.02 % occurs at a mass of 12 gram.
Ekstraksi Gliserin Dari Biodiesel Menggunakan Deep Eutectic Solvent Berbasis Asam Tanat-Cholin Chloride Sebagai Ekstraktan Ola, Pius D.; Kusuma, Albert W.; Nitbani, Febri O.; Ola, Antonius R. B.
Chemistry Notes Vol 4 No 2 (2022): Chem. Notes 2022, 4 (2)
Publisher : Universitas Nusa Cendana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35508/cn.v4i2.9650

Abstract

Biodiesel is a concern for many parties because it is environmentally friendly, non-toxic, and renewable. One of the problems faced in the use of biodiesel as an alternative energy is the process of purification from impurities and by-products such as glycerin which is complicated and expensive. Glycerin can cause saponification, increase ignition delay, incomplete combustion, blockage and increase engine maintenance costs. In this study, deep eutectic solvents (DES) synthesized from choline chloride (ChCl) salts and tannic acid were used as extractants for the extraction of glycerin from biodiesel synthesized through palm oil transesterification with methanol as a trans substituent and KOH as a catalyst. The effect of the composition of the constituent moles of DES and the ratio of biodiesel-DES mass to glycerin content of biodiesel has been studied. The results showed that the higher the content of ChCl salt in DES and the greater the ratio of biodiesel-DES, the lower the glycerin content in biodiesel, with the highest decrease of 65.7693% (glycerin content after extraction of 2.0193%) obtained from the composition of the mole DES 1:47 (Tannic acid:ChCl) and the mass ratio of biodiesel-DES 1:3. The biodiesel produced has not met SNI 1782, which is 0.02%.
Penurunan Kadar TSS Dan COD Limbah Cair Rumah Pemotongan Hewan Menggunakan Elektrolisis Ledoh, Sherlly M. F.; Dasul, Aprilia R. T.; Ola, Pius D.; Ola, Antonius R. B.
Chemistry Notes Vol 4 No 2 (2022): Chem. Notes 2022, 4 (2)
Publisher : Universitas Nusa Cendana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35508/cn.v4i2.9652

Abstract

Research has been carried out on Reducing COD and TSS Levels of Slaughterhouse Liquid Waste Using the Electrolysis Method. This study aims to analyze the effect of electrolysis time and voltage (voltage) on the reduction of COD and TSS levels of RPH waste water using the electrolysis method. Electrolysis is the decomposition of electrolytes by direct electric current using two kinds of electrodes as conductors of electric current. The results showed that the longer the electrolysis time and the greater the voltage, the percentage of reduction in COD and TSS levels increased. The percentage reduction obtained was 31.43% COD and 95% TSS at 120 minutes of electrolysis time and 12 volts of voltage.
PREPARATION OF ACTIVATED CHARCOAL FROM Terminalia catappa L. SEED SHELL AS AN ADSORBENT OF LIQUID WASTE OF TOFU INDUSTRY Ola, Pius D.; Bria, Apriance M.; Gauru, Imanuel; Rozari, Philiphi De
Chemistry Notes Vol 5 No 1 (2023): Chem Notes 2023, 5(1)
Publisher : Universitas Nusa Cendana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35508/cn.v5i1.11851

Abstract

A research on preparing activated charcoal from Terminalia catappa L. seed shell has been done. This study aimed to determine the characteristics of activated charcoal from Terminalia catappa L.seed shells and test its ability to reduce COD and TSS from a liquid waste of the tofu industry. The parameters studied in characterizing activated charcoal included moisture content, ash content, absorption of I2 and surface area using methylene blue. Analysis of the COD parameter used the redox titration method, while the TSS parameter used the gravimetric method. he optimum time for applying activated charcoal to liquid tofu waste was by measuring COD and TSS levels after interaction with activated charcoal. Results of activated charcoal characterization showed a moisture content of 5%, ash content of 2.10%, an absorption capacity of I2 761.4 mg/g and a surface area of ​​26.74 m²/g. The highest decrease in COD levels occurred at 90 minutes of contact time from initial levels of 2,976 mg/L to 2,304 mg/L, with a reduction efficiency of 22.6%, and the highest decrease in TSS levels occurred at 90 minutes of contact time from initial levels of 1,440 mg/L to 334 mg/L, with a reduction efficiency of 76.8%. Generally, activated charcoal from Terminalia catappa L. seed shells showed an ability to reduce the COD and TSS from the liquid waste of the tofu industry.
EKSPLORASI PEWARNA ALAMI DARI KULIT BUAH NAGA (Hylocereus Polyrhizus) DENGAN BESI(III) SEBAGAI MORDANTING Lakabela, Merliana; Ola, Pius D.; Nitti, Fidelis
Chemistry Notes Vol 6 No 2 (2024): Chem. Notes, 6(2), 2024
Publisher : Universitas Nusa Cendana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35508/cn.v6i2.21356

Abstract

Telah dilakukan penelitian tentang pemanfaatan ekstrak etanol kulit buah naga (Hylocereus polyrhizus) sebagai pewarna kain katun dengan teknik pencelupan dengan besi(III) sebagai mordan. Proses mordanting dilakukan dengan tiga cara yaitu pre mordanting, mordan simultan dan post mordanting. Ketahanan warna diuji dengan mencuci dan menjemur kain yang telah diwarnai selama 5 jam (10.00-15.00 WITA). Pengaruh dari semua perlakuan tersebut diamati intensitas warna menggunakan metode pencitraan digital. Hasil penelitian menunjukkan bahwa teknik pre mordanting menghasilkan kain dengan intensitas warna paling tajam dan nilai intensitas warna paling rendah (108,3) yang berarti lebih banyak zat warna terikat pada kain. Uji ketahanan warna menunjukkan bahwa teknik post mordanting menghasilkan warna kain dengan daya tahan paling baik yang dibuktikan dengan nilai persen kelunturan paling rendah.
PERBANDINGAN METODE DESTRUKSI BASAH DAN KERING PADA PENENTUAN KADAR LOGAM Fe DALAM TEPUNG TERIGU SECARA SPEKTROFOTOMETRI SERAPAN ATOM Ola, Pius D.
Chemistry Notes Vol 7 No 1 (2025): Chem. Notes, 7(1), 2025
Publisher : Universitas Nusa Cendana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35508/cn.v7i1.22424

Abstract

Telah dilakukan penelitian tentang perbandingan perbandingan metode destruksi basah dankering pada penentuan kadar logam Fe dalam tepung terigu secara spektrofotometri serapanatom. Sampel yang digunakan dalam penelitian ini adalah tepung terigu merek gatot kaca,lencana merah dan kompas yang diberi kode 1, 2, dan 3. Hasil penelitian menunjukan reratakadar air untuk sampel 1, 2, dan 3 adalah 12,51%, 12,05%, dan 12,46%. Nilai rerata kadarabu adalah 0,5456 % , 0,5358% dan 0,5463%. Nilai rerata protein adalah 7,59%, 7,14% dan9,11%. Hasil uji anova pada tingkat kepercayaan 95% menunjukkan perbedaan yangsignifikan antara metode destruksi kering dan destruksi basah. Konsentrasi Fe pada ketigajenis sampel untuk metode destruksi kering secara berurut adalah 77,33 ppm; 71,40 ppm;78,15 ppm dan untuk metode destruksi basah yaitu 76,23 ppm; 70,75 ppm; 75,77 ppm. Padaanalisis konsentrasi Fe, metode destruksi kering lebih baik daripada metode destruksi basah,dimana nilai RSD yang diperoleh 0,2098% dan recovery 98,74% untuk metode destruksikering sedangkan metode destruksi basah RSD yang di peroleh 0,7335% dan recovery80,22%.
Co-Authors Antonius R.B. Ola baun, Duwita N. Beti, Milce Y. Bria, Apriance M. Dasul, Aprilia R. T. Dodi Darmakusuma, Dodi Fidelis Nitti Gauru, Imanuel Hermania Em Wogo Kadang, Luther Kusuma, Albert W. Lakabela, Merliana Lapailaka, Titus Ledoh, Sherlly M. F. Ngana, Mersi N. Nitbani, Febri O. Philiphi de Rozari Sandri, Mariana I. Suwari Suwari Taus, Elisabeth