Kajian Senyawa Bioaktif Dari Tumbuhan Obat Tradisional Kulit Akar Tumpunik (Artocarpus rigida BI)

This study aims to isolate and identify bioactive compounds contained in the root of tumpunik (Artocarpus rigida BI). The root was firstly extracted using ethanol and then continued with fractionation process using a solvent combination of hexane, chloroform, ethyl acetate, and methanol. The obtained fractionate then was tested its toxicity towards shrimp A Salina larvae. The results show that soxhletation with methanol solvent could produce 36.5 grams of concentrated extract (7.30% of sample weight). Meanwhile, soxhletation using hexane fractionates, chloroform, ethyl acetate, and methanol produces 3.4 grams, 6.9 grams, 9.3 grams, and 16 grams of concentrated extract respectively. The LC50 (ppm) after three-hour toxicity test are 780, 367, 136, and 845 respectively

Adsorpsi Batubara terhadap Ion Timbal

Tujuan penelitian ini adalah untuk mempelajari kondisi optimum penyerapan arang aktif batubara yang terlebih dahulu diaktivasi dengan KOH dan asam fosfat dalam menyerap ion timbal. Kondisi itu meliputi ratio batubara dengan aktivator, pH, dan berat arang aktif. Kondisi optimum yang didapatkan selanjutnya digunakan untuk mengukur service volume dan breakthrough. Pengamatan dengan SEM X-ray Mapping dilakukan terhadap karakter batubara awal dan arang batubara yang telah diaktivasi. Hasil penelitian menunjukkan, bahwa Aktivasi dengan menggunakan H3PO4 menghasil arang aktif rata-rata 35%, dan ini hasil lebih banyak dibandingkan aktivasi pakai KOH, yaitu rata-rata 30% berat kering awal. Sementara itu, dengan menggunakan ion Pb sebagai larutan model, ternyata penyerapan aktivator H3PO4 lebih baik, yaitu 99,43% dibandingkan dengan KOH yang hanya 89,21%

Kajian Senyawa Bioaktif Dari Tumbuhan Obat Tradisional Kulit Akar Tumpunik (Artocarpus rigida BI)

This study aims to isolate and identify bioactive compounds contained in the root of tumpunik (Artocarpus rigida BI). The root was firstly extracted using ethanol and then continued with fractionation process using a solvent combination of hexane, chloroform, ethyl acetate, and methanol. The obtained fractionate then was tested its toxicity towards shrimp A Salina larvae. The results show that soxhletation with methanol solvent could produce 36.5 grams of concentrated extract (7.30% of sample weight). Meanwhile, soxhletation using hexane fractionates, chloroform, ethyl acetate, and methanol produces 3.4 grams, 6.9 grams, 9.3 grams, and 16 grams of concentrated extract respectively. The LC50 (ppm) after three-hour toxicity test are 780, 367, 136, and 845 respectively

ADSORPTION OF REMAZOL BRILLIANT BLUE DYE USING PALM OIL SHELL FLY ASH HCl ACTIVATED

Remazol Brilliant blue is an azo dye that is widely used in textile dyeing. The most appropriate handling method to be used in overcoming problems caused by textile dye waste is adsorption. Fly ash is an adsorbent that can be used to overcome this problem. Chemical activation was carried out using 1 M HCl solution. Besides that, physical activation was also carried out at 500°C for 1 hour. Research is needed to determine the optimum conditions for fly ash in dye adsorption to produce high adsorption efficiency. XRF characterization showed that palm shell fly ash was dominated by CaO of 71.064% and SiO2 of 15.734%. Characterization using FTIR shows the presence of Si-O groups in Fly ash. To analyze the surface morphology of the fly ash adsorbent, an SEM test was carried out and it was known that the surface morphology of the fly ash adsorbent after chemical and physical activation showed pore formation. Characterization using Surface Area Analyzer showed a surface area of 13.6153 m2/g. optimum absorption conditions at pH 6 with an adsorption capacity of 15.84 mg/g. optimum contact time of 60 minutes with an adsorption capacity of 15.54 mg/g. The optimum adsorbent mass is 0.5 g with an adsorption capacity of 9.54 mg/g and the optimum adsorbent concentration is at 200 ppm with an adsorption capacity of 69.08 mg/g. In this study the adsorption model used is the Freundlich isotherm. Based on the research result, it is known that fly ash is a suitable adsorbent for dye adsorption which is characterized by high color removal efficiency. Further characterization regarding the initial conditions of fly ash is needed as a comparison for fly ash after activatio

Irritation Test and Effectiveness of Facial Humidity Skin from Peel Off Gel Mask Based of Date Palm Seeds Powder (Phoenix dactylifera)

Dry skin is the main problem of skin damage such as scaly, peeling, cracked and itchy skin, this is because the skin loses fluids due to weather changes and as we age we experience a decrease in the amount of oil and water on the skin. Facial skin care is done, one of which is by using a peel off gel mask of dates palm powder. The fat content is useful as a facial skin moisturizer. This study aims to determine the formula of the peel off gel mask which has determine its safety and effectiveness in moisturizing facial skin. The peel off gel mask was made into 3 formulas with the concentration of date palm seeds powder 1% (FI), 2% (FII) and 3% (FIII).  Procedures in this study include irritation test, hedonic test and facial skin moisture test using a skin analyzer compared before and after use. Peel off gel mask choco milk as a positive control. The results showed that FII ( 2%) corresponding the requirements of no irritation occurs compared to other formulas. Testing the effectiveness of facial skin moisture showed that FII (2%) was able to increase the water content after use and the water content was higher than the positive control. Results it can be concluded that the FII has safe for use and effective in moisturizing facial skin

Optimalisasi Produksi Alat Gali Muat Cat 330 GCOGC-318 dengan Metode Overall Equipment Effectiveness serta Analisis Six Big Losses pada Pengupasan Overburden PT. Caritas Energi Indonesia Kabupaten Sarolangun Provinsi Jambi

PT Caritas Energi Indonesia conducts mining using the open pit mining method. PT Caritas Energi Indonesia experienced problems with not achieving production targets. Based on the actual production of PT Caritas Energi Indonesia obtained on the CAT330 Excavator, the average productivity value in July 2021 is 64.745,73 BCM. As for the production of the calculation results of the overall equipment effectiveness value of the CAT330 Excavator in July 2021 with a cumulative percentage of 0.67%, this means that the effectiveness of the CAT330 Excavator in July 2021 is 67%. Then the production calculation based on the overall equipment effectiveness method is obtained with an average productivity in July 2021 for the CAT330 Excavator for 93,225.90 BCM. For the calculation of the analysis of the six big losses, the most dominant loss is reduced speed losses with a cumulative percentage of 98.5%. PT Caritas Energi Indonesia has a production plan target per month with a range of 100,000.00 BCM.So improvements or changes are needed with an increase in the cycletime plan but the use of tools based on the overall equipment effectiveness method is still with a cumulative percentage below the standard <85% with a cumulative percentage of results obtained after repairs of 70%. However, for the production achievement after repair of 104,195.52 BCM, it exceeds the production plan target of PT Caritas Energi Indonesia.Keywords:Production, Excavator CAT330GC-318,Losstime, Overall Equipment Effectiveness, Six Big Losses, Diagram Fishbone

Rancangan Dimensi Sump berdasarkan Pertambahan Debit Air yang masuk dalam 3 Bulan Kemajuan Tambang di PT. Khatulistiwa Makmur Persada, Kabupaten Bungo, Provinsi

 In the mining industry, high rainfall can hamper mining operations and can reduce production targets that have been planned by the company. Moreover, if open pit mining runs during weather where the intensity of the rain is high, the water from runoff will inundate the ground floor of the pit in the basin area and has the potential to become one of the causes of muddy miningfronts which will certainly disrupt mining activities. Mine drainage conditions at PT. Khatulistiwa Makmur Persada, especially in pit 1, uses a mine drainage system with the Mine Dewatering method, namely by collecting water that has entered the mining site by making a sump at the mining site. Therefore we need an ideal and appropriate sump dimension design which will be used for the  next 3 months. The shape of the sump recommended by the researcher is a trapezoidal shape, because this shape is commonly used for sumps. Which for this trapezoidal shape has a cross-section of the base and a square-shaped surface with a larger surface areathan the base area and forms an angle of 45.Keywords :Mining, Sump, Water, Rai

Pengaruh Kemiringan Sluice Box terhadap Proses Pemisahan Pasir Besi Berdasarkan Perbedaan Specific Gravity pada Skala Laboratorium

Mineral processing aims to obtain a concentrate of certain mineral particles and to obtain a satisfactory quality of concentrate and purification of the metal. For mineral concentrations, particulate minerals must be free or containonly small amounts minerals. In theprocessing of minerals, there are severa lmethod sused, one of whichis the gravity method. One tool tha tapplies thegravity methodis a sluice box. Itis known that the slope of the sluice box can affect the valueof recovery (R) and concentration (K) produced. The research was conducted using quantitative research methodswhich were carried out with literature studies first and then data collection was carrie dout as proof of th ecorrelation between the slope angle factor to the amount of concentrate content and the recovery obtained in the iron sand concentration stage using a sluice box. This study focuses on the effect of tool slope in achievin g there sulting concentrate and calculates the feed content and concentrateweight, with some limitations, namely the minerals used are ironsand as the mineral concentration and silicas and as tailings with a mesh sizeof 80. The study was carried out without changing other parameters. Where using a constant water flowof 0.42 l/s, the riffle design is verticalangleand riffle with height 2 cm as much as 3 riffle sand without using a carpet. In thiscase, the change in slope indicates that the more inclined the condition of the toolis, the faster the speed of th ewater, causing more feed in it tobe pushed further. The impact is in the formof recovery value which decreases with increasing angleused. The gradeatthe 2˚ angle has the highest grade from the other angles used. This is because the grade acquisition is not only influenced by the slope factor but ther factors that determin e the results such as water discharge, water rate, riffle shape and others. Even though the slope is increased, the waterstill has difficulty passing through the riffle so that the turbulence that occurs is still less and causes the lighterminerals to be trapped at thebottomofthe riffle due tobeing squeezed by the heavier minerals. In addition, the greater the slope, the smallerthe recovery obtained because the speed of the flowing water is greater causing the material tobe pushed further and the more tilted the tool, th eless riffle capacity. Keyword: mineral separation, gravity method, sluice box, grade , recover

Kajian Teknis Geometri Peledakan untuk Mendapatkan Fragmentasi dan produksi yang Optimum di Lokasi Penambangan Batu Gamping Area 242,IUP 329 Bukit Tajarang,PT. Semen Padang.

In the mining process with hard rock, it is necessary to blast (blasting) which aims to scatter the rock, so that it can facilitate digging activities. The success of the explosion process can be seen in the rock fragmentation resulting from the explosion. The purpose of this research is to determine the actual blast geometry used in the field, to determine the size of the fragmentation and blast results based on the geometry used, to determine the effective explosion geometry so that the fragmentation and production results of the explosion carried out by PT Semen Padang meet the crusher. From the results of research and calculations in the field, it was found that PT Semen Padang used two types of blasting geometry, namely geometry with loads and spacing of 3 x 4 and 4 x 5 with an average hole depth of 10 m, stemming 4 m, and the length of the filling, namely 6 m. In geometry with loads and spacing of 3 x 4, the average result of F80 fragmentation on an 80 cm screen is 61.72 cm and with an average tonnage volume of rock uncovered 24,400 tons/day, while in the geometry of 4 x 5 the average yield is obtained. Fragmentation of F80 on a 80 cm screen is 89.5 cm and with an average tonnage volume of rock uncovered 28,210 tons/day. It is necessary to change the blasting geometry used in order to achieve 80 cm F80 fragmentation results and meet the required production of 30,000 tons/da