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All Journal Jurnal Ilmu Tanah dan Lingkungan (Journal of Soil Science and Environment) Bumi Lestari Biologi Edukasi : Jurnal Ilmiah Pendidikan Biologi Journal of Applied Chemical Science SC (Savana Cendana) : Jurnal Pertanian Konservasi Lahan Kering Chemistry Indonesian Journal of Chemical Research JURNAL VOKASI ILMU-ILMU PERIKANAN (JVIP) Jurnal Manusia dan Lingkungan
Suwari
Fakultas Sain Dan Teknik Universitas Nusa Cendana, Jl. Adisucipto Penfui Kupang
Agriculture, Biological Sciences & Forestry Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Earth & Planetary Sciences Education Energy Engineering Environmental Science Social Sciences

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The Sulphur Dioxide (SO2) Gas and the Total Suspended Particulate Contents of the Ambient Air of Kupang City: Case Report Welem A. Faot; Suwari; Sherlly Ledoh
Journal of Applied Chemical Science Volume 1, No. 1 , 2012
Publisher : Journal of Applied Chemical Science

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Abstract

A research has been done to find out the concentration of sulfur dioxide gas (SO2) and the total suspended particulate (TSP), as well as correlation between the amount of vehicle and the concentration of SO2 and TSP ambient air in subdistrict Oebobo of Kupang City. The measuring of SO2 using pararosaniline method, while the TSP was measured by using digital particle concentration meter. The results showed that the highest concentration of SO2 was found on Nangka Street (in the afternoon) that was 148.05 μg/Nm3 and the lowest was on Palapa Street (in the afternoon) that was 106.55 μg/Nm3. The highest concentration of TSP was recorded from the Amabi Street (in the morning) which was 49.50 μg/Nm3 and the lowest concentration was recorded from the Palapa Street (in the afternoon) was 17.95 μg/Nm3. There is a correlation between the amount of vehicle and concentration of SO2, and correlation between the amount of vehicle and concentration of TSP.
Determination of Lead by the Electrothermal Atomic Absorption Spectrometry in a Candidate Reference Material of Fish Meal Using Chemical Modifiers Suwari; H. R. Hadiman; Tahid
Journal of Applied Chemical Science Volume 1, No. 2 , 2012
Publisher : Journal of Applied Chemical Science

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Abstract

Different chemical modifiers for the determination of lead by the electrothermal atomic absorption spectrometry (ETAAS) in a candidate reference material of fish meal matrix were studied. The optimal pyrolysis and atomizing temperatures (TP and TA) of lead obtained by adding modifiers, lanthanum nitrate, magnesium nitrate, and ammonium dihydrogen phosphate ,were (750 and 2300 oC), (600 and 2000 oC) and (650 and 2200 oC), respectively, whereas the TP and TA of the lead without modifier were 450 and 2000 oC, respectively. Performance test of the chemical modifiers are based on dynamic range, characteristic mass, limit of detection, precision, accuracy, sample recovery, and repeatability. The experiment without modifier was carried out as control of the performance. The performance of analytical procedures by adding ammonium dihydrogen phosphate modifier were found that 0.2 - 2.0 ng of the dynamic range, 19 pg of characteristic mass, 16 pg of limit of detection, 3.45 % of precision, 98 ± 3% of sample recovery, and 0.04 ± 0.01 μg/g of repeatability . The application result of the method for the determination of fish meal matrix 0.87 ± 0.03 μg/g of lead. The accuracy of the proposed method was verified by analyzing the certified reference material, cod muscle, BCR CRM 422 and the result was 0.092±0.008 which is almost similar with its certified value, 0.085±0.015. These results indicated that ammonium dihydrogen phosphate is the best choice modifier compared to the other in all aspects cited above.
The Characteristics of Synthetic Chitosan Prepared from Snail Shells of Achatina Fulica Jacob A. Frans; Suwari; Luther Kadang
Journal of Applied Chemical Science Volume 2, No. 1 , 2013
Publisher : Journal of Applied Chemical Science

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Abstract

A synthetic chitosan prepared from snail shells of achatina fulica has been done. The chitosan was yielded by the isolation stages that involved deproteinization, demineralization, and deacetylation that was by NaOH 3.5%, HCl 1 M, and 50% NaOH, respectively, and followed by determination of moisture content, ash content, viscosity, degree of deacetylation and functional groups. The moisture and ash contents were determined by a gravimetric method, the viscosity was by Ostwald instrument, while the degree of deacetylation and the functional groups were by FT-IR. The results showed that using those protocols provided 23.20% of chitosan content from the original snail shell material. The chitosan yielded had (in %) moisture and ash contents, viscosity, and degree of deacetylation were 0.24, 20.0, 198.3, and 68.5%, respectively. The functional group detected that involved –OH group was appeared at 3433.06 cm-1, while the -CH2- asymmetry and -CH2- symmetry were appeared at 2923.88 cm-1 and 2875.67 cm-1, respectively. The functional groups of -CH3-, C=O amide, and C-N aliphatic amines were appeared at 2979 cm-1, 1789.82 cm-1, and 1494.73 cm-1, respectively. The twin band of -NH2 was not found because of overlapping occurred between the -OH and-NH amine groups.
The Acid-Activated Sand Potentially Ameliorates Water Calcium Content Hermania Em Wogo; Yoseph J. Hema; Suwari
Journal of Applied Chemical Science Volume 2, No. 1 , 2013
Publisher : Journal of Applied Chemical Science

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Abstract

The sand activation using three types of acids namely HNO3 0.1 M, H2SO4 1 M, and H3PO4 14 M have been done. The acid-activated sand was used as adsorbent of calcium ions (Ca2+) contained in hard water. The study was firstly determined the chemical contents of the sand using Energy Dispersive Xray Fluorescence instrument and followed by determination of the sand surface area using methylene blue and it’s surface acidity by titration. The experiment conducted with absence of the acid was carried out as an control. The results showed that the sand contained 47.95 % of SiO2 and 18.79% of Fe2O3. The highest surface area was found at the sample activated by H3PO4 14 M (27.73 m2/g). The surface area activated by H2SO4 1 M and HNO3 0.1 M were 26.56 and 25.59 m2/g, respectively. Highest surface acidity was found at the sample activated by H3PO4 14 M (299.60 µmol/gram), while those treated with H2SO4 1 M and HNO3 0.1M were 277.70 and 204.80 µmol/gram, respectively. That was, however, the sample without acid activation had surface acidity of 113.60 µmol/gram. Furthermore, the sand activated by H3PO4 14 M maximally absorbed 892.86 μmol Ca/g sand and those activated by H2SO4 1 M and HNO3 0.1M maximally absorbed 847.46 and 684.93 μmol Ca/g sand, respectively; whereas the sand without activation maximally absorbed 510.20 μmol Ca/g sand. Those results indicate that higher surface area higher surface acidity and higher capability of the calcium ion absorptions. Therefore, the acids-activated sand potentially reduces calcium ions content of hard water.
The Water Quality Status of Kupang Tilong Dam Reported by the Pollution Index Parameters Nurlailah D. Kartika; Suwari; Luther Kadang
Journal of Applied Chemical Science Volume 2, No. 1 , 2013
Publisher : Journal of Applied Chemical Science

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Abstract

There has been reported the water quality status of Kupang Tilong Dam using pollution index parameters. The water samples were taken from five stations and determined using purposive sampling method. The pollution index parameters analyzed were temperature, pH, dissolved oxygen (DO), biochemical oxygen demand (BOD), chemical oxygen demand (COD), total solid suspended (TSS), N-nitrate, P-phospate, and water discharge. The results showed that temperature and pH were 25-28.5ºC and 7.54-7.61 pH units, respectively, while the DO, BOD, COD, TSS, N-nitrate, and P-phosphate values (in mg/L) were 8.26-12.5, 1.63-3.04, 11.26-47.37, 4.73-6.28, 0.019-0.043, and 0.01-0.16 mg/L, respectively. The pollution loads detected on station I within water discharges of 250 m3/s could receive the BOD, COD and TSS loads by 236.67, 3681.16, and 488.52 tons/year, respectively. While the station II within water discharges of 0.15 m3/s could receive 126783.01, 2210094.72, and 290587.56 tons/year, respectively. Those results indicated that the water quality status of Kupang Tilong Dam is in a state between a good quality up to a slight polluted that was 0.80 to 3.18 of pollution index value.
Utilization of Java Acid Seed (Tamarindus indica) Extract as a Coagulant in Tofu Waste Treatment Process: Short Communication Meri Letik; Luther Kadang; Suwari
Journal of Applied Chemical Science Volume 2, No. 1 , 2013
Publisher : Journal of Applied Chemical Science

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Abstract

A study concerning the utilization of java acid seed (tamarindus indica) extract as a coagulant to be developed further for tofu wastewater treatment has been conducted. This study aimed to determine the optimum concentration of tamarind seed coagulant and to know the ability of the coagulant to reduce the concentration of total solid suspended (TSS), biochemical oxygen demand (BOD), chemical oxygen demand (COD) and amonia at optimum pH and temperature. In this study, jar-test method was used to confirm the effective dose of tamarind seed extract in reducing turbidity of the water samples analyzed. The applied concentrations of the seed extracts were 2000, 4000 and 6000 ppm. The results showed that the optimum dosage to reduce TSS, BOD and ammonia was 2000 mg/L and the COD was 4000 mg/L . At the optimum concentrations, the coagulant ameliorated up to 92.92% of BOD, 91.30% of COD, 83.34% of TSS, and 97.46% of ammonia levels and the water treated was found visually clear. Those results conclusively indicates that the coagulant made from the tamarind seed ameliorates effectively the BOD, COD, TSS, and ammonia contents as well as the turbidity levels of the water samples flowing from the tofu industry.
Analisis Risiko Kesehatan Lingkungan Akibat Paparan Nitrit dan Kadmium dari Air Sumur di Kelurahan Tarus: Environmental Health Risk Analysis Due to Exposure Nitrit and Cadmium from Well Water on Tarus Village Charly Mutiara; Wilhelmus I. I. Mella; Suwari
Jurnal Ilmu Tanah dan Lingkungan Vol 22 No 2 (2020): Jurnal Ilmu Tanah dan Lingkungan
Publisher : Departemen Ilmu Tanah dan Sumberdaya Lahan, Fakultas Pertanian, IPB University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29244/jitl.22.2.40-45

Abstract

Air sumur di Kelurahan Tarus diduga telah terkontaminasi nitrit dan kadmium yang berasal dari pemakaian secara berlebihan pupuk SP-36 dan Urea. Oleh karena itu, penelitian ini telah dilaksanakan untuk membandingkan konsentrasi kontaminan nitrit dan kadmium dalam air sumur di daerah persawahan dan pemukiman dengan ambang baku mutu air baku air minum dan memprediksi besarnya risiko dari kontaminan terhadap kesehatan manusia. Penelitian deskriptif eksperimental ini menggunakan maing-masing 10 sampel air sumur dari daerah persawahan dan pemukiman. Kadar nitrit dan kadmium dianalisis dengan metode spektrofotometri dan spektrofotometri serapan atom. Baku mutu air minum dan air baku air minum berdasarkan PP 82 tahun 2001 dan PerMenKes 492 tahun 2010. Prediksi risiko terhadap kesehatan manusia dilakukan berdasarkan metode analisis risiko Public Health Assessment. Hasil penelitian menunjukkan bahwa di daerah persawahan dan permukiman berturut-turut terdapat tiga dan lima sumur yang mengandung nitrit namun kandungan tersebut masih berada di bawah nilai baku mutu air baku air minum. Sedangkan untuk kadmium, terdapat berturut-turut delapan dan tujuh sumur di daerah persawahan dan permukiman kandungannya berada di atas nilai baku mutu air baku air minum. Analisis risiko menunjukkan bahwa nitrit di persawahan dan pemukiman tidak berisiko terhadap kesehatan, sedangkan kadmium persawahan dan pemukiman yang berisiko sebanyak 14 sampel untuk durasi waktu 30 tahun, 12 sampel untuk 20 tahun, 10 sampel untuk 10 tahun dan tiga sampel untuk lima tahun. Karena itu diharapkan adanya pengurangan volume konsumsi air sumur yang berisiko, dan penanganan air tanah yang tercemar serta pengurangan pemakaian pupuk anorganik.
Effectiveness of Liquid Waste Treatment of RSUD Kefamenanu Through Filtration Process Yanti Benyamin; Suwari Suwari; Dodi Darmakusuma
Biologi Edukasi: Jurnal Ilmiah Pendidikan Biologi Vol 12, No 2 (2020): Biologi Edukasi: Jurnal Ilmiah Pendidikan Biologi
Publisher : Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24815/jbe.v12i2.19339

Abstract

Hospital liquid waste has the potential to pollute the environment and harm health if not processed properly because it contains high enough organic and inorganic compounds, pathogenic microorganisms, toxic chemicals and radioactive substances. Rumah Sakit Umum Daerah (RSUD) Kefamenanu is the only hospital owned by the Government of Kabupaten Timor Tengah Utara and located in the middle of community settlements and uses wastewater treatment plants (IPAL) in the treatment of hospital liquid waste since 2016. The results of liquid waste quality examination showed that there are several parameters that have increased after processing through IPAL so that researchers use filtration method in processing liquid waste of RSUD Kefamenanu. This study aims to find out the effectiveness of liquid waste treatment of RSUD Kefamenanu through filtration process using filter media in the form of coconut coir, sand, palm oil, activated charcoal and zeolite. This research is a pseudo experiment, namely to find out the percentage of decreased levels of liquid waste parameters through the filtration process. The results showed that the levels after processing had an average value of BOD 3.86 mg/L, TSS 14 mg/L and ammonia of 0.10 mg/L. The filtration process was able to lower BOD levels by 63.62%, TSS by 93.24% and ammonia by 86.57%. Based on these results, it can be concluded that the filtration process is able to lower levels of BOD, TSS and ammonia in liquid waste of RSUD Kefamenanu.
MODEL DINAMIK PENGENDALIAN PENCEMARAN AIR KALI SURABAYA Suwari Suwari; Etty Riani; Bambang Pramudya; Ita Djuwita
Bumi Lestari Journal of Environment Vol 11 No 2 (2011)
Publisher : Environmental Research Center (PPLH) of Udayana University

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Abstract

The Surabaya River plays an important role as water supply of the Surabaya PDAM, irrigation, industry, transportation, and means of recreation. However, domestic, industrial, and agricultural waste that were discharged into the river stream polluted the Surabaya River and decreased the carrying capacity and assimilative capacity. Therefore, effort to monitor and control the Surabaya River water pollution need to be well organized and implemented. The aim of the research is to develop a model of water pollution control on Surabaya River region. The research was carried out based on field survey, in situ and laboratory sample examination, questionnaire, and expert judgment. Pollution control model developed in this study was built into three sub-models, namely: (1) ecology sub-model, (2) social sub-model, and (3) economy sub-model using powersim constructor 2.5 version. Pollution control scenarios were developed using prospective analysis. The results of water pollution parameters such as TSS, DO, BOD, COD, N-NO2, and the level of mercury (Hg) were higher than the allowable class 1 standard. The sources of Surabaya River pollution mainly are domestic and industrial waste with total load of BOD, COD, and TSS are 55.49, 132.58, and 210.13 ton/day, respectively. According to water quality status, the Surabaya River is categorized as heavy polluted and the loading pollution need to be decreased. By using prospective analysis, there were five important factors that affect the future of the Surabaya River water pollution control, i.e.: (1) population growth and community awareness, (2) community perception, (3) implementation of regulations, (4) commitment/local government support, and (5) system and institutional capacity. There are three development scenarios, that are pessimistic, moderate and optimistic. The moderate and optimistic scenario are the realistic scenarios that occur in the future for Surabaya River water pollution control in considering of ecology, social and economy aspects.
KONTRIBUSI LIMBAH DOMESTIK PENDUDUK DI SEKITAR SUNGAI BIKNOI TERHADAP KUALITAS AIR BENDUNGAN BIKNOI SEBAGAI SUMBER BAKUAIR MINUM SERTA UPAYA PENANGANANNYA Maya Roman; Fransiskus Kia Duan; Suwari Suwari
Bumi Lestari Journal of Environment Vol 16 No 2 (2016)
Publisher : Environmental Research Center (PPLH) of Udayana University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/blje.2016.v16.i02.p08

Abstract

Biknoi River is potential to be polluted by domestic cesspool because it crosses settlement area. It is important to be paid more attention because the water from Biknoi River is used as the basic source of Municipal Waterworks (PDAM) of Kupang town. The aims of the research are identifying the society along the riversides’ habitual in throwing out the domestic cesspool which potential to reduce the quality of the water in that river, evaluating the waters’ quality, knowing the contribution of the society’s domestic cesspool towards the water’s quality in Biknoi dam, knowing the level of water pollution by using Pollution Index method and knowing the effort for solving this problem.This research combined physical research and social research. Physical research was done by chemistry analysis for the sample of water, while the social research was done by having an interview which used questionnaire. The result of this research showed that there was a strong relationship between the society’s habitual with the reduce of the water’s quality of Biknoi River. The reduce of the water’s quality showed by the result of pollution enumeration index i.e. medium pollution category. The biggest pollution is COD i.e. 28.996 ton / month. The effort to solve this problem is by making the society to be aware, cesspool management, aware of rules, critical area rehabilitation, real action, controlling and layout.
Co-Authors Bambang Pramudya Charly Mutiara Dodi Darmakusuma Etty Riani Fransiskus Kia Duan H. R. Hadiman Hermania Em Wogo Inty Megarini Ita Djuwita Jacob A. Frans Jefry Presson Kothan, Domonika Pransa Luther Kadang Maya Roman Meri Letik Nurlailah D. Kartika Philipi de Rozari Pius Dore Ola Priyo Santoso Ricky Gimin Sherlly Ledoh Tahid Theofilus Nalle Welem A. Faot Wilhelmus I. I. Mella Yanti Benyamin Yohana Ivana Kedang Yoseph J. Hema