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EFEKTIVITAS WASTE TEA LEAVES (CAMELLIA SINENSIS) SEBAGAI BIO ADSORBEN PENYERAP LOGAM FE DAN PB DI SUNGAI MUSI PALEMBANG
Ayu, Selia Putri;
Taufik, Muhammad
KINETIKA Vol. 12 No. 1 (2021): KINETIKA 01032021
Publisher : Politeknik Negeri Sriwijaya
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The Musi River is the main water source for the people of Palembang City which is utilized in various sectors such as fisheries, industry, transportation, and housing. These activities resulted in a decrease in the physical and chemical quality of the Musi River water which was marked by an increase in the concentration of heavy metals in it. Some of the polluting metals found in the water content of the Musi River are Fe and Pb. To reduce the levels of Fe and Pb, efforts are needed to bind them so that they are not mixed with river water. The purpose of this study was to determine the effectiveness of the use of tea waste as a bio adsorbent and to determine the level of metal reduction. The method used in this research is adsorption which is considered as a simple, effective, and can use adsorbents from unused materials. The adsorbent used was tea dregs waste with variations in the mass differences of the adsorbent of 0.25 grams, 0.50 grams and 0.75 grams and the contact time was 5 minutes, 10 minutes and 15 minutes. The research began with reducing the size of the tea dregs to 80 mesh, then chemical activation with 0.1 N HCl solution for ± 24 hours. Furthermore, the adsorption process was carried out by contacting the adsorbent with the Musi River water sample based on the difference in time and adsorbent mass. The concentration of the adsorption solution was then analyzed using AAS. Based on the test results, the highest absorption of Fe that can be produced from tea dregs adsorbent is 80.78% in the adsorbent mass of 0.75 grams with a contact time of 15 minutes, while the highest absorption of Pb that can be produced from tea waste adsorbent is 93.75% in mass. adsorbent 0.75 grams with a turning time of 15 minutes.
PERBANDINGAN EFISIENSI DYE SENSITISIZED SOLAR CELL (DSSC) DARI EKSTRAK DAUN PACAR AIR, EKSTRAK BUNGA PACAR AIR MERAH DAN UNGU (IMPATIENS BALSAMINA LINN) SEBAGAI DYE SENSITIZER
Alimuddin, Arni;
Iswadi, Iswadi;
Sahara, Sahara
JFT : Jurnal Fisika dan Terapannya Vol 3 (2016): Desember
Publisher : Universitas Islam Negeri Alauddin Makassar
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DOI: 10.24252/jft.v3i0.16829
Research on Comparison Of Efficiency Dye Sensitized Solar Cell (Dssc) Of Henna Leaf Extract Water, Water Henna Flower Red And Purple (Impatiens Balsamina Linn) as a Dye Sensitizer in order to determine how much comparative efficiency of dye sensitisized solar cell (DSSC ) of water henna leaf extract, flower extract water henna red and purple as a dye sensitizer. The method used in this research is the method of Doctor Blade. Based on the results of measurements of I-V by using a source of light, the efficiency gained from henna leaf extract 0.008473333% water by absorption spectrum wavelengths are in the range of 245- 660.50 nm and an absorbance of 0.036. For efficient water henna red flowers of 0.007466667% of this extract is the wavelength range of 242.50 - 312 500 nm and absorbance of 4573, while for the water purple flowers girlfriend 0.004833333% efficiency results obtained in the wavelength range 238.50 - 350.50 nm and absorbance 4,617 , Henna leaf extract water as a dye sensitizer on sensitisized dye solar cell (DSSC) have the highest efficiency.
UJI KUAT TEKAN DAN DAYA SERAP AIR PADA BATAKO DENGAN PENAMBAHAN LIMBAH TULANG IKAN
Sahara, Sahara
JFT : Jurnal Fisika dan Terapannya Vol 6 No 2 (2019): Desember
Publisher : Universitas Islam Negeri Alauddin Makassar
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DOI: 10.24252/jft.v6i2.11693
Batako adalah material penyusun dinding rumah yang biasa menjadi pengganti batu bata. Material penyusun batako adalah semen dan pasir. Dalam penelitian ini dibuat batako dengan penambahan serbuk tulang ikan dengan komposisi berbeda. Tujuan dari penelitian ini adalah untuk mengetahui bagaimana pengaruh penambahan serbuk tulang ikan terhadap kuat tekan dan daya serap air pada batako. Untuk mendapatkan hasil penelitian digunakan beberapa tahap metode penelitian antara lain: Pembuatan sampel uji batako, Pengujian kuat tekan dan daya serap air. Sampel uji terdiri dari 7 sampel dengan komposisi campuran B1 = 5% Tulang Ikan: 45 % Semen, B2 = 10 % Tulang Ikan : 40 % Semen, B3 = 15% Tulang Ikan : 35 % Semen, B4 = 20% Tulang Ikan : 30 % Semen, B5 = 25% Tulang Ikan : 25 % Semen, B6 = 30% Tulang Ikan: 20 % Semen, B7 = 35% Tulang Ikan : 15 % Semen. Komposisi air dan pasir dibuat konstan dengan campuran Pasir 40% : Air 10%. Kemudian dilanjutkan dengan pengujian kuat tekan dan daya serap air tiap sampel. Hasil penelitian menunjukkan bahwa penambahan 5% dan 10% tulang ikan ke dalam agregat campuran batako berpengaruh pada peningkatan nilai kuat tekan. Sebaliknya penambahan diatas 25 % mengakibatkan penurunan nilai kuat tekan batako. Jika dibandingkan dengan standar SNI, sampel B1, B2 dan B4 memenuhi standar Nasional Indonesia (SNI) beton kelas III dan IV. Untuk Daya Serap air pada semua sampel rata-rata 10% dan memenuhi standar Nasional (SNI) penyerapan air yang nilainya maksimal 25%.
PENGUKURAN DAN ANALISIS DOSIS PROTEKSI RADIASI SINAR-X DI UNIT RADIOLOGI RS. IBNU SINA YW-UMI
Rahmayani, Rai;
Sahara, Sahara;
Zelviani, Sri
JFT : Jurnal Fisika dan Terapannya Vol 7 No 1 (2020): Juni
Publisher : Universitas Islam Negeri Alauddin Makassar
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DOI: 10.24252/jft.v7i1.14118
This study aims to determine the dose of radiation in a large room with measurements from various directions, knowing the great wall by measuring the absorption of a scattering outdoors doses, and determine the radiation dose received by radiation workers in radiology installations. This study uses Surveymeter, the meter, the best ruler X-rays, and phantom. In measurements carried out three phases: the first measure exposure dose in a room with a distance of 1 m and 2 m with a voltage of 50 kV, 55 kV and 60 kV, the second stage taking the raw data of radiation received by workers of the head of the installation and the third stage knowing absorption wall by measuring the scattering dose outdoors. Based on the research that has been done, it can be concluded that the largest radiation dose is on the right side of the tube either with an object that is 33 µSv/h or without an object that is 33.6 µSv/h at a distance of 1 m and a voltage of 60 kV, but the value at both the other positions, namely the left and front side of the plane do not have such a large difference that it can be stated that the values obtained at the three positions are almost the same at the same voltage and distance, the largest dose received by operator IV is 0.215 mSv/h and the average dose the average received by workers is 0.2 mSv/h in accordance with Regulation of BAPETEN No.4 of 2013, and the ability of the walls to absorb outdoor radiation doses is very good as seen from the results of undetectable radiation measurements because all are absorbed by the wall. Â
PENGARUH KEHALUSAN SEMEN TERHADAP KUAT TEKAN MORTAR
Afni, Nur;
Sahara, Sahara;
Hernawati, Hernawati
JFT : Jurnal Fisika dan Terapannya Vol 2 (2015): Desember
Publisher : Universitas Islam Negeri Alauddin Makassar
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DOI: 10.24252/jft.v2i0.16894
This study aims to determine the effect of fineness to compressive strength of cement mortar. Mechanical parameters measured are fineness and compressive strength. From these test results, lead to the conclusion that the overall mechanical properties of the cement and mortar for all treatments meet the Indonesian National Standard (SNI) in 2004, the highest level of refinement that is 410.8 kg/m2, while the lowest is 387 kg/m2. For the compressive strength at age 3 days produces the highest value is 181 kg/m2, while the lowest is 143 kg/m2, at the age of 7 days resulted in the highest value is 242 kg/m2, while the lowest is 204 kg/m2, at the age of 28 days produces the highest value is 350 kg/m2, while the lowest is 265 kg/m2. Concluding that the more finely granular cement eat the higher the compress strength.
ANALISIS DOSIS PAPARAN RADIASI DI UNIT RADIOLOGI RS. BHAYANGKARA MAKASSAR
Hasmawati, Hasmawati;
Sahara, Sahara;
Hernawati, Hernawati
JFT : Jurnal Fisika dan Terapannya Vol 3 (2016): Desember
Publisher : Universitas Islam Negeri Alauddin Makassar
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DOI: 10.24252/jft.v3i1.15722
This study aims to measure the wall thickness of material radiation shield by using calipers, stage of measuring the radiation dose produced the best x-rays in different directions by using Surveymeter at the distance measuring point on the wall with a height of 10 cm, 1m, 2m, the third stage is measuring the radiation dose x-rays in the vertical and horizontal measurement with the object and without an object with a fixed voltage 75 Kv with distance measurements from a source to a device 1 meter and 2 meters in space and outside space. And the last stage takes raw radiation doses received by workers of the head of the installation space radiology Bhayangkara Makassar. Based on the research results in the first phase of the thick walls of the radiology that is 15 cm+2 mm (Pb) each side and wooden doors 5 cm+2 mm (Pb) and glass Pb 2 cm+2 mm (Pb), rate of radiation exposure resulting air x-ray in many directions obtained radiation is greatest there is in the direction of the left side air that is 3600 μSv/h, the dose rate on the measurement of vertical and horizontal with a specified distance of radiation of the total of the door operator vertical measurement that is equal to 3400 μSv/h, the dose received by the operator of the largest radiation received by the third receiver that is equal to 0.1599 μSv / h and the measurement results outside the room is 0.00 μSv / h was not detected while the radiation received by the receiver the first small at 0.1546 μSv/h and the mean dose average received by the operator of 0.1 μSv/h this is in accordance with the SNI allowed for workers is 50 mSv/ h in the first year. Keywords : radiation dose , radiation workers , radiation shield
PENGUJIAN PAPARAN RADIASI SINAR-X DI UNIT RADIOLOGI RSUD KOTA MAKASSAR
Yuliamdani, Riska;
Sahara, Sahara;
Fuadi, Nurul
JFT : Jurnal Fisika dan Terapannya Vol 7 No 1 (2020): Juni
Publisher : Universitas Islam Negeri Alauddin Makassar
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DOI: 10.24252/jft.v7i1.13867
The research has been conducted to determine the effect of exposure to a dose of radiation to the distance and time from the source of radiation and to determine how large exposure to radiation scattering which is received by a worker or operator in the space radiology Hospital Makassar. This research uses X-ray aircraft, Surveymeter, meter, and phantom. In measurements carried out two stages namely stage first measure exposure dose of radiation to the distance the results of the research that is done on testing the safety of exposure to radiation rays -X in units of radiology Hospital cities of Makassar, then obtained a conclusion as follows based on parameters of distance and time from the source of radiation effect large against  dose of radiation exposure. A more far distance from the source of radiation the dose that is received by increasingly smaller. While the influence of the amount of time of the exposure beam of radiation that is increasingly long time irradiation then getting big too doses of radiation are obtained. Value exposure to radiation scattering which is received by the worker radiation chamber radiology Hospital of Makassar is the dose of radiation that is received by workers with long time use of radiation were the biggest received by operators XIII which amounted to 0.1769 mSv/h, while the value of the dose which is the smallest  received by the operator XI of 0.0593 mSv/h and the average dose received by the operator is 0.1570mSv/h.
PENGARUH TEMPERATUR TERHADAP NILAI KAPASITANSI ELEKTRODA SUPERKAPASITOR GRAPHENE BERBASIS BAMBU BETUNG (Dendrocalamus asper)
Amaliah, Fia;
Sahara, Sahara;
Fuadi, Nurul
JFT : Jurnal Fisika dan Terapannya Vol 5 No 2 (2018): Desember
Publisher : Universitas Islam Negeri Alauddin Makassar
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DOI: 10.24252/jft.v5i2.15645
This study aims to analyze the effect of temperature variations on the capacitance of graphene material supercapacitor electrodes from bamboo material Betung (Dendrocalamus asper). The results obtained are graphene reduction can be synthesized by the hummer method which is reduced using Zn and continued with a thermal process with different temperature variations. The data obtained shows that from the GO, rGO 80 ° C, and 200 ° C rGO samples the largest capacitance value is the 200 ° C rGO sample, which is 8.87 × 10-3 F / gram with d-spacing 3.821082 Å, while the capacitance value for GO and rGO 80 ° C samples respectively 2.23 × 10-5 F / gram with d-spacing 3.668773 Å and 1.67 × 10-4 F / gram with d-spacing 3.680739 Å. This happens because the thermal effect is given, the greater the temperature given, the more pores are formed and the surface area will also be larger which results in more ion absorption and electron transfer on the electrode surface. However, if the given temperature is too large then the pore structure will be damaged and produce a low surface area. All samples that have the largest capacitance at the smallest pay rate are 10 mV / s.
PERBANDINGAN EFISIENSI DYE SENSITISIZED SOLAR CELL (DSSC) DARI EKSTRAK DAUN PACAR AIR, EKSTRAK BUNGA PACAR AIR MERAH DAN UNGU (IMPATIENS BALSAMINA LINN) SEBAGAI DYE SENSITIZER
Alimuddin, Arni;
Iswadi, Iswadi;
Sahara, Sahara
JFT : Jurnal Fisika dan Terapannya Vol 4 No 1 (2017): Juni
Publisher : Universitas Islam Negeri Alauddin Makassar
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DOI: 10.24252/jft.v4i1.15687
Research on Comparison Of Efficiency Dye Sensitized Solar Cell (Dssc) Of Henna Leaf Extract Water, Water Henna Flower Red And Purple (Impatiens Balsamina Linn) as a Dye Sensitizerin order to determine how much comparative efficiency of dye sensitisized solar cell (DSSC) of water henna leaf extract, flower extract water henna red and purple as a dye sensitizer. The method used in this research is the method of Doctor Blade. Based on the results of measurements of I-V by using a source of light, the efficiency gained from henna leaf extract 0.008473333 % water by absorption spectrum wavelengths are in the range of 245- 660.50 nm and an absorbance of 0.036. For efficient water henna red flowers of 0.007466667 % of this extract is the wavelength range of 242.50 - 312 500 nm and absorbance of 4573, while for the water purple flowers girlfriend 0.004833333% efficiency results obtained in the wavelength range 238.50 - 350.50 nm and absorbance 4,617, Henna leaf extract water as a dye sensitizer on sensitisized dye solar cell (DSSC) have the highest efficiency.Keywords: absorbance, doctor blade, DSSC, efficiency, henna plant water.
ANALISIS WAKTU PENYINARAN PADA KALIBRASI DOSIMETER SAKU GAMMA (PEN DOSIMETER)
Herianti, Herianti;
Sahara, Sahara;
Hernawati, Hernawati
JFT : Jurnal Fisika dan Terapannya Vol 2 (2015): Desember
Publisher : Universitas Islam Negeri Alauddin Makassar
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DOI: 10.24252/jft.v2i0.16875
The Purpose of this research is to know the effects of time irradiation to dosage in calibration dosimeter pocket gamma (pen dosimeter). This research is also intended to know the effects of time irradiation in response dosimeter pocket gamma (pen dosimeter). Relations between time irradiation to dosage based on calculations time irradiation, irradiation in pen dosimeter to calculate dosage reading material. Result of contact time irradiation with the dose by more than dosage that used time irradiation needed more for a long time. Results obtained from the relationship time irradiation in response dosage is becoming more time irradiation then dosage that read in pen dosimeter result in more than. dosage 100 µSv, 500 µSv, 1000 µSv, 1500 µSv, 2000 µSv, 2500 µSv, 3000 µSv, 3500 µSv, 4000 µSv, and 4,500 µSv, factors calibration 0.91 . Calibration factor which is obtained from pen dosimeter that has been calibration claimed could be used and functioned as specifications based on standard calibration.