Article Per Year (5 Year)
p-Index From 2021 - 2026
0.659
P-Index
This Author published in this journals
All Journal Journal of Applied Chemical Science Chemistry Indonesian Journal of Chemical Research Chemical Engineering Journal Storage (CEJS) Chemistry Notes
Bibiana D. Tawa
Department of Chemistry Faculty of Science and Engineering, Nusa Cendana University
Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Energy Engineering Environmental Science

Published : 9 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 9 Documents
Search

 1 
The Moringa Seed (Moringa oleifera, L.) Extracts Potentially Reduce the Effects of Clothes Washing Wastewater on Growth of Green Beans (Vigna radiata) Merymistika Y. Afred; Bibiana D. Tawa; Pius D. Ola
Journal of Applied Chemical Science Volume 1, No. 2 , 2012
Publisher : Journal of Applied Chemical Science

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

A study concerning the use of Moringa seed (Moringa oleifera, L.) extracts to reduce the influence of clothes washing wastewater on growth of green bean (Vigna Radiata) has been conducted. The study aimed to determine the effective dose of coagulants prepared from moringa seed extracts (400, 600, 800, 1000, and 2000 mg/L) on germination of green beans in wastewater. The results showed that the optimum dose of coagulant was 2000 mg/L. The treatments with various doses of coagulants indicated significantly different except for the dose of 1000 mg/L and 2000 mg/L (P < 0.05). The stem height and leaf watering with coagulant water were 25.9 cm and 14.1 cm2, respectively, while by the tap water were 24.3 cm and 10.99 cm2, respectively. Those results conclusively indicated that the water coagulant prepared from moringa seed extracts promotes growth of the vigna radiata.
The Amelioration of BOD and COD Levels in Tofu Industry Liquid Waste by the Extracts of Moringa Seeds (moringa oleifera L.) and Activated Carbon of the Corn Cob (Zea mays L.) Nurhadyati; Bibiana D. Tawa; Febri O. Nitbani
Journal of Applied Chemical Science Volume 2, No. 1 , 2013
Publisher : Journal of Applied Chemical Science

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

There has been conducted a research to measure effectiveness of moringa seeds (moringa oleifera L) extract as biokoagulan and the activated carbon of corn cob (Zea mays, L) as adsorbent to ameliorate the chemical oxygen demand (COD) and biochemical oxygen demand (BOD) contents in tofu industry liquid waste. The used metods were, first method, the coagulation-floculation using moringa seed extract in various concentrations of 5000, 5200, and 5400 ppm, and the activated carbon of corn cob at concentration of 26.67 ppm and the second, the combination of coagulation/floculation with adsorption method. The results showed that the initial values of the COD and BOD of the tofu liquid waste were 1048.8 mg/L and dan 201.78 mg/L, respectively. The separated koagulation-floculation process provided maximum concentration of moringa seed extract was 5200 ppm and able to reduce COD and BOD levels respectively up to 555.07 and 161,68mg/L, while using 26.67 ppm of corn cob activated carbon could reduce the COD and BOD levels respectively up to512.13 and 115.42 mg/L; whereas the combination of coagulation/floculation-adsorption method utilizing 5200 ppm of biocoagulan and 26.67 ppm of the activated carbon yielded those COD and BOD levels respectively up to 272.93 and 73.07 mg/L. Referring to the SNI standard, these COD and BOD values meet the demand quality standard required. Both moringa seed extract and the corn cob activated carbon are prospective material to maintain COD and BOD levels of water flowing from the tofu industry.
Pemodelan Regresi Berganda Pada Pemanfaatan Tanah Liat Dan Batu Karang Sebagai Adsorben Dalam Pengolahan Greywater Dho Tawa, Bibiana; Kale, Alfius R.; Hadijah Salim, Siti; E. Selan, Odi Th.
Indonesian Journal of Chemical Research Vol 5 No 2 (2018): Edisi Bulan Januri (Edition For January)
Publisher : Jurusan Kimia, Fakultas Sains dan Teknologi, Universitas Pattimura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30598/ijcr.2018.5-bib

Abstract

The aims of this research are to determine the adsorbent properties, the effect of flow rate and ratio of adsorbent in lowering COD, turbidity, pH levels, and to determine the effect of flow rate interaction and adsorbent ratio in decreasing COD, turbidity and pH levels. This research was conducted with Completed Random Design (CRD) 23 consisting of 2 independent variables namely flow rate (0.2; 0.5; and 0,7 mL/s) and ratio of adsorbent (w/w) of clay : coral (1:1; 1:2; and 2:1) with 3 times replications. The result of the test of the adsorbent properties showed that the clay has hihger acidity and surface area then coral reef, and the coral content of coral reefs is 38.65 %. The flow rate and the ratio of adsorbent based on results of the study also reinforced by the ANOVA test give effect on the levels of COD and turbidity while the interaction of this two variables have an effect on the COD content. The best treatment based on Duncan Multiple Range Test (DMRT) was at 0.7 mL/s flow rate with a 1:1 adsorbent ratio. The multiple regression model for this study is Y =160.3 – 171.17X1 -188.83X2 + 31.67X1X2 + 146.67X12 + 66.67X22.
Pemisahan Surfaktan Anionik dari Air Limbah Deterjen Menggunakan Biokogulan Biji Kelor ( Moringa Oliefera L.) Afred, Merymistika Yufrani Afred; Bibiana Dho Tawa; Pius Dore Ola
Chemical Engineering Journal Storage (CEJS) Vol. 5 No. 4 (2025): Chemical Engineering Journal Storage (CEJS)-Agustus 2025
Publisher : LPPM Universitas Malikussaleh

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29103/cejs.v5i04.22824

Abstract

Air limbah deterjen umumnya mengandung senyawa aktif surfaktan anionik. Pembuangan limbah ini langsung ke lingkungan dapat mengganggu biota perairan dan menurunan kualitas tanah serta memiliki efek karsinogenik jika manusia terpapar dalam jangka waktu yang lama. Tujuan penelitian ini untuk menentukan dosis biokoagulan Moringa Oliefera L. (MO) yang efektif untuk menurunkan kadar surfaktan (LAS) pada air limbah deterjen dan mengetahui pengaruh jenis air (air koagulasi, air limbah deterjen dan air keran) terhadap perkecambahan Vigna Radiata.  Hasil analisis diperoleh dosis optimum dengan penambahan biokoagulan biji kelor 2000 mg/L dengan persentase penyisihan LAS sebesar 96%. Selain itu, uji pengaruh jenis air terhadap perkecambahan  kacang hijau diperoleh tinggi batang dan luas daun yang disiram air hasil koagulasi (25,9 cm  dan 14,1 cm2) lebih baik dibandingkan dengan air keran (24,3 cm dan 10,99 cm2) dan air deterjen (24,6 cm dan 9,6 cm2).  Namun  hasil uji Anova menunjukkan dampak konsentrasi LAS pada air tidak ada perbedaan nyata. Kata Kunci: koagulan, biji kelor, air limbah deterjen, LAS   ABSTRACT Removal of Surfactant Anionik From Detergent Wastewater By Biocoagulant Moringa Oleifera Seeds Detergent wastewater commonly have surfaktan anionic as active agent. Disposal of this wastewater directly into the environment can disrupt aquatic biota and reduce soil quality as well as have carcinogenic effects if humans are exposed to it for a long period of time. The aim of this research is determined optimum dosages Moringa oleifera L. (MO) as biocoagulant to remove LAS from laundry wastewater and evaluate the effect of coagulation water, detergent wastewater and tap water to Vigna radiata germination. The result show that optimum dosages of Moringa oleifera L. is 2000 mg/L which could remove 96% of LAS in sample. Moreover, the study of the influence water to Vigna radiata germination show the lenght of steam and leaf by coagulation water ((25,9 cm and 14,1 cm2) better than coagulation water (24,3 cm and 10,99 cm2) and tap water (24,6 cm and 9,6 cm2). However, the result anova test show that the effect of LAS concentration in water is not significant.   Keyword: coagulant, Moringa oleifera, detergent wastewater, LAS    
PEMANFAATAN BATU KARANG-PASIR DALAM PROSES PENGOLAHAN GREYWATER Weking, Maria Y. T.; Tawa, Bibiana D.; Ledoh, Sherlly M. F.; Gauru, Imanuel
Chemistry Notes Vol 1 No 1 (2018): Chem. Notes 2018, 1(1)
Publisher : Universitas Nusa Cendana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35508/cn.v1i1.1573

Abstract

A study of Greywater treatment has been conducted. By utilising vast local coral reefs and sand as filter media, we aimed to treat synthetic waste water in term of reducing its pH, temperature, COD, phosphates and turbidity parameter. The sample was passed gravitationally through 3 variation of filtering agent composition i.e. 1:1, 2:1 and 1:2 of coral reefs to sand ratio respectively in 2 flow rates: 0,4 and 0,8 mL/s. The collected up flow effluent was then analysed. Data resulted were then tested with ANOVA statistical test. The result showed that the mass ratio of the media and the flow rate influenced parameters. The best treatment was obtained at the 1:1 mass ratio in 0,4 mL/s flow rate. The effluent fulfilled the Indonesian water standard quality according to PP No 82 tahun 2001 and PERMENKES No 416/MENKES/PER/1990.
PEMANFAATAN ABU LAYANG (FLY ASH) SEBAGAI ADSORBEN PADA MINYAK JELANTAH Wogo, Hermania Em; Bokay, Ernawati A.; Tawa, Bibiana D.; Ledoh, Sherlly M. F.
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.v2i2.3279

Abstract

A research on the conducted on the use of fly ash as an adsorbent in used cooking oil. This research was conducted with the aim to know the characteristics of fly ash without activation and activation with 6M HCl and to improve the quality of used cooking oil from adsorbent processing based on the Indonesian national standard (SNI). This research was conducted in several stages, namely surface acidity with the titration method, determination of surface area with the blue methylene method, determination of functional groups by FTIR analysis and oil quality based on parameters of acid number, peroxide number and smoke point. The results showed that the acidity of the surface of the fly ash was activated and without activation of 4 and 3.6 m2 / g respectively. surface area of ​​fly ash without activation 17,480 m2/g at contact time 80 and activated fly ash 18,471 m2/g at contact time 70. FTIR spectra of fly ash without activation 795,38 and 779.95 cm-1 and activated 795.38 and 778,02 cm-1 which is a symmetrical stretching adsorption band of symmetric ≡Si-O (≡Si-O-Si≡). Fly ash used for refining used cooking oil (2,468 mg KOH / g) is able to reduce the acid number 0.361 mg KOH / g in activated fly ash and 0.561 mg KOH / g for fly ash without activation, the peroxide number for activated fly ash decreased by 72.34% compared to fly ash without activation 69.14%, oil smoke point purification results from activated fly ash 203ºC and without activation 210ºC which is close to the new oil smoke point value of 200ºC. When compared with SNI, the values ​​of acid numbers, peroxide numbers and smoke points meet the standard.
PENGARUH KOMPOSISI BIOAKTIVATOR KOTORAN SAPI DAN DAUN GAMAL (GLIRICIDIA SEPIUM) DENGAN NUTRISI UBI JALAR TERHADAP KUALITAS KOMPOS Tawa, Bibiana D.; Tnunay, Yarni R.; Suwari, Suwari; Nitbani, Febri O.
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.v2i2.3362

Abstract

A research conducted about effect of bioaktivator of cow feces and gamal (gliricidiasepium) leaves with sweet potato nutrition toward the compost quality. This research hadpurpose to know the compost characteristics of cow`s dung composition and gamal. Thecharacteristic determined to 60% of cow`s dung and 40% gamal leaves used purple sweetpotatoes nutrition and water that made constant. The variation of cow`s dung and gamal leaveswas 90%: 10%, 50%: 50%, 30%: 70%. The research result show that in the 14th days therewere compost characteristics to produce compost based on SNI 19-7030-2004 andrequirements of the minister of agriculture number 70/Permentan/SR.140/10/2011. Thevariations of cow`s dung and gamal leaves did not effect towards C/N ratio compost.
Pengaruh Komposisi Daun Gamal (Gliricidia sepium Hbr.) dan Kotoran Sapi dengan Nutrisi Pisang terhadap Rasio C/N Kompos Sedo, Karolina M.; Tawa, Bibiana Dho; Lulan, Theodore Y. K.; Gauru, Imanuel; Cunha, Theodorus M. Da
Chemistry Notes Vol 3 No 2 (2021): Chem. Notes 2021, 3(2)
Publisher : Universitas Nusa Cendana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35508/cn.v3i2.6089

Abstract

It has been done a research on the effect of the composition of gliricidia sepium Hbr. And cow dung with banana nutrition on the composting process on the C/N ratio. This research was conducted with the aim of knowing the effect of the composition and the length of time required for fermentation. Composting was made with a variety of cow dung : gliricidia sepium Hbr. In a ratio of 1:9, 1:1, 3:2, 7:3, 9:1, and 2:3 in % by using 25% banana nutrition and 100% water from the total weight of the manure. On this research was found that the optimal time is on 14th day with characteristic of compost that was produced, equal with the the Indonesia National Standar (SNI Kompos 19-7030-2004). The conclusion is the compcsition of cow dung and Gliricidia sepium leaves did not significant affect to the C/N compost ratio.
Karakteristik Pelumas Bekas Hasil Adsorpsi Menggunakan Arang Batang Kesambi (Schleichera oleosa) dan Zeolit Alam Ende Teraktivasi H3PO4 Cunha, Theodorus M. Da; Fone, Maria Y.B.; Tawa, Bibiana Dho; Ola, Antonius R. B.
Chemistry Notes Vol 4 No (1) (2022): Chem. Notes 2022, 4 (1)
Publisher : Universitas Nusa Cendana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35508/cn.v4i(1).7734

Abstract

Used lubricants contain contaminants from oxidation and thermal degradation, resulting in a decrease in the quality and performance of the lubricant. Therefore, the adsorption process is carried out using kesambi stem charcoal and natural zeolite Ende activated H3PO4 to remove contaminants and improve the quality of used lubricants. Determination of the density and kinematic viscosity of used lubricants mass variations of 0.5, 0.66, 1 and 2 grams for each adsorbent. The results obtained show that the value of the used lubricant density from the adsorption results is relatively the same, namely 0.83 g/cm3, while the kinematic viscosity is different for each variation of the mass and type of adsorbent. Kesambi stem active charcoal has an optimum mass of 0.66 grams with a kinematic viscosity value of 128.84 cSt, active natural zeolite at a mass of 0.5 grams of 113.59 cSt and continued use of active natural zeolite-active natural charcoal, namely at a mass of 2 grams of 106, 38 cSt. These results indicate that the variation in the mass of the adsorbent has no effect on the change in density value but shows a significant change in the increase in the value of the kinematic viscosity of the used lubricant from the adsorption. The best percentage of kinematic viscosity increase efficiency is using activated charocoal, which is 71.83%.
Co-Authors Afred, Merymistika Yufrani Antonius R.B. Ola Bokay, Ernawati A. Cunha, Theodorus M. Da E. Selan, Odi Th. Fone, Maria Y.B. Gauru, Imanuel Hadijah Salim, Siti Hermania Em Wogo Kale, Alfius R. Ledoh, Sherlly M. F. Lulan, Theodore Y. K. Merymistika Y. Afred Nitbani, Febri O. Nurhadyati Pius Dore Ola Pius Dore Ola Sedo, Karolina M. Suwari Suwari Tnunay, Yarni R. Weking, Maria Y. T.