A research has been done about study of preparation and characterization of Alkaline Fuel CelI (AFC) electrode resulted from electrodeposition of platinum (Pt) on backing layer carbon (C). The First step of this research was to make of backing layer that continued with analyzing of hydrophobicity and conductivity value. Electrodeposition was carried out on backing layer with variation of platin…
Synthesis of Bentonite-Polydopamine Composite with CuO Semiconductor as Catalytic Photodegradation of Methylene Blue Dye has been conducted. The resulting bentonite-polydopamine CuO composite, was characterized using XRD, SEM-EDX, and UV-Vis DRS. The methylene blue photodegradation was carried out at several variabels, including the initial of concentration, contact time, and photocatalyst weig…
Industri pembuatan tempe menghasilkan limbah cair yang jika langsung dibuang ke perairan dapat menurunkan daya dukung lingkungan. Suatu metode alternatif yang dapat digunakan untuk mengatasi permasalah limbah cair tempe ini adalah dengan menggunakan metode elektrokoagulasi. Penelitian ini dilakukan untuk menentukan pengaruh kuat arus dan waktu proses elektrokoagulasi terhadap kualitas limbah ca…
The aim of this research is to analyzes the effect of sulfuric acid concentration and the type of adhesive on the characteristics of coconut shell and fiber biobriquettes, by determining the quality parameters of biobriquettes in accordance with SNI 01-6235-2000. Coconut shells and husks are activated using sulfuric acid, with concentrations of 1, 1.5 and 2 N. The adhesives added is tapioca and…
Air sungai dapat mengandung berbagai logam berat salah satunya yaitu Cr. Penelitian ini bertujuan untuk menentukan distribusi serta kadar konsentrasi Cr dalam air sungai gasing menggunakan metode Spektofotometri Serapan Atom (SSA). Selain itu juga menentukan analisis lapangan pada beberapa parameter yaitu suhu, kecepatan arus, pH dan DO. Penelitian ini diawali dengan pengambilan sampel air pada…
Telah dilakukan pembuatan biobriket dari limbah kulit durian menggunakan perekat kulit pisang raja dan tapioka dengan variasi waktu dan temperatur karbonisasi yang bertujuan untuk menentukan pengaruh variasi waktu dan temperatur karbonisasi terhadap analisis proksimat biobriket dari limbah kulit durian yang dihasilkan. Kulit durian dikarbonisasi menggunakan furnace pada temperatur 400, 500, 600…
Ekstrak kasar enzim selulase diperoleh dari Enterobacter asburiae, bakteri selulotik yang banyak ditemukan pada pencernaan rayap lahan gambut. Enzim dimanfaatkan untuk menghidrolisis selulosa dari Tandan Kosong Kelapa Sawit (TKKS) menjadi glukosa. Penelitian ini bertujuan untuk mengetahui pengaruh waktu hidrolisis terhadap kadar glukosa serta pH dan jumlah substrat terhadap aktivitas enzim dala…
Porous silica is referred to as a chemically and thermally stable material with uniform pore size. Metal cerium from cerium sulfate metal salt is impregnated into silica, with the addition of sulfuric acid to increase its solubility. In this study, Ce(SO4)2-SiO2 with KHPhthalate template was used as a catalyst synthesized by calcination, impregnation and hydrothermal methods, and its applicatio…
Synthesis of chitosan-GO composites using the sol-gel method and its application to methylene blue adsorption has been carried out. This study aims to determine the ability of chitosan-GO composites to adsorb methylene blue. Chitosan-GO composites were made with mass ratios (1:1), (1:3) and (1:5) and characterized by XRD. Material with a ratio (1:1) was chosen to be characterized using BET, SEM…
Research on the synthesis of Fe3O4-PDA-TiO2 and its application in the photodegradation of methylene blue dye have been successfully carried out. The synthesized materials were characterized using XRD, UV-DRS, SEM-EDS and VSM. The results of the XRD characterization showed that the highest intensity value was located at 2θ with a value of 25.36º and a crystal size of 26.83 nm was obtained. Th…
Nowadays, Hydrogen is the most promising candidate for clean and sustainable energy. The calorific value of its combustion reaches 286 kJ/mol, at the same weight, the energy of hydrogen is three times greater than that of other fuels. Innovation in the development of hydrogen energy continues until it can be applied to the general public. Research on hydrogen production by utilizing proton exch…
Vitex pinnata merupakan tumbuhan yang tersebar luas di daerah tropis yang berasal dari famili Lamiaceae. Bioaktivitas seperti antioksidan, antibakteri, dan antikanker yang berasal dari ekstrak maupun senyawa metabolitnya telah dilaporkan dari tumbuhan ini. Penelitian ini bertujuan untuk mengisolasi senyawa metabolit sekunder selain senyawa balanophonin yang dapat bersifat polar atau non polar d…
Salmon fish oil (SOF) is a type of functional food similar to probiotics. MIS contains fatty acids which have the ability to effect the growth of Bifidobacteria Longum.B Longum has good antibacterial properties so it is often us an good bioactivity. This research was conducted to determine the effect of MIS for growth of probotic and the effect of the combination of these two test sample so tha…
Tandan Kosong Kelapa Sawit (TKKS) merupakan sumber lignoselulosa yang terdiri dari 45-50% selulosa, 25-35% hemiselulosa, dan 10-15% lignin. Lignin dapat menghambat proses pencernaan di dalam rumen sehingga nutrisi rumen tidak terpenuhi. Pengurangan kandungan lignin dilakukan melalui proses fermentasi dengan menggunakan jamur P. chrysosporium untuk mendegradasi senyawa lignin pada TKKS. Kadar se…
ABSTRACT : Ether compounds such as diisopropyl ether can be used as fuel additives. Diisopropyl ether obtained through the dehydration process of isopropyl alcohol over metal impregnated catalyst. This study aims to synthesized silica Cerium (IV) Sulfate catalyst using Phthalate as template. The catalysts prepared by calcination temperature variations at 400oC, 500oC, 600oC, 700oC, and 800oC fo…
Limbah cair industri tahu dapat berpotensi mencemari lingkungan jika langsung dibuang ke lingkungan tanpa diolah terlebih dahulu. Limbah cair industri tahu dapat diolah menggunakan elektrokoagulasi dengan elektroda aluminium. Penelitian ini bertujuan untuk mengetahui pengaruh kuat arus dan waktu kontak bervariasi terhadap penurunan kadar Chemical Oxygen Demand (COD), Total Suspended Solid (TSS)…
Salah satu olahan buah kelapa yang sangat menjanjikan dan mempunyai peluang besar untuk dikembangkan adalah minyak kelapa murni atau Virgin Coconut Oi (VCO). Teknologi pembuatan VCO ada bermacam-macam, yaitu sentrifugasi, fermentasi, enzimatis dan pemompaan. Metode tersebut masih terdapat kelemahan yaitu rendemen yang dihasilkan masih rendah dan kualitas VCO kurang baik karena adanya kontaminan…
The electrochemical reduction process to produce methanol is carried out using Membrane Electrode Assembly (MEA) as the reaction center. The Cu2O-ZnO/C catalyst was used to make various electrodes with the addition of a process control agent (PCA). The characterization results using the Particle Size Analyzer (PSA) method found that the particle size of the catalyst using methanol PCA has a gre…
Kandungan fosfat di dalam air pada dasarnya tidak berbahaya apabila konsentrasinya tidak melebihi ambang batas. Namun, ion fosfat akan berbahaya dan dapat mencemari lingkungan perairan apabila konsentrasinya sudah melebihi nilai ambang batas. Salah satu metode untuk mengatasi permasalahan ini adalah dengan metode adsorpsi menggunakan biochar dari sekam padi yang dikompositkan dengan Fe3O4. Tuju…
There has been investigation on the adsorption of the methylene blue dye using Fe3O4/SDS composites and Fe3O4 compounds. The coprecipitation process was used to create the adsorbent material. XRD, BET, VSM, and FTIR are used to characterize materials. The diffraction peaks of Fe3O4/SDS 1:1 and 2:1 are similar to JCPDS 65 - 3107 from Fe3O4. Fe3O4/SDS 1:1 and Fe3O4/SDS 2:1 have surface areas of 1…
Diisopropil eter (DIPE) adalah lternative aditif oksigenat yang dapat meningkatkan kualitas bensin, meminimalkan emisi gas CO dan hidrokarbon selama pembakaran. Penelitian ini bertujuan untuk mensintesis katalis silika zirkonium fosfat dengan template EDTA untuk aplikasi dehidrasi isopropil alkohol menjadi diisopropil eter. Hasil XRD menunjukan bahwa pada variasi katalis silika zirkonium fosfat…
Tempurung kelapa merupakan sisa biomassa yang terdiri dari lignin, selulosa dan hemiselulosa, memiliki potensi sebagai bahan baku dalam sintesis oksida grafena tersulfonasi (S-GO). S-GO disintesis menggunakan metode Hummer dengan asam sulfat sebagai agen sulfonasi. Hasil sintesis meliputi grafit, oksida grafena, dan oksida grafena yang telah tersulfonasi. Karakterisasi FTIR digunakan untuk meng…
Molase adalah substrat organik yang mengandung gula teridiri atas glukosa, sukrosa dan fruktosa dengan konsentrasi tinggi. Dengan demikian molase dapat difermentasi menghasilkan etanol oleh yeast Saccharomyces cerevisiae. Penggunaan yeast terimobilisasi dalam fermentasi dapat mempermudah proses pemisahan sel, penggunaan kembali sel, kepadatan sel yang lebih tinggi, aktivitas metabolisme yang le…
This research aims to produce a Bentonite-PDA-NiO composite which can be used as a photocatalyst to degrade Methylene Blue dye. The composite was made with a mass ratio of 1:1 and then characterized using XRD, SEM-EDX, and UV-Vis DRS. The photodegradation process of Methylene Blue was carried out by varying the initial dye concentration, time, and mass of the composite, as well as at certain pH…
Passiflora foetida is a vine plant belonging to Passiflora genus that reported to have biological activity as an antibacterial, anti-ulcer, antidiabetic, antioxidant and anti-inflammatory. Studies on steroid compounds and toxicity assays have never been reported from P. foetida stems. Therefore, this study was conducted to isolate steroid compounds from n-hexane fraction and toxicity assays fro…
Tithonia diversifolia is a plant from the Asteraceae family of the genus Tithonia, originating from North and Central America. T. diversifolia has been reported as a biofumigant, anti-TMV (Tobacco mosaic virus), insecticide, antidiabetic, and antioxidant both from extracts, fractions, and metabolites that were successfully isolated. The content of secondary metabolites from T. diversifolia leav…
The textile industry produces a lot of dye waste in liquid form. One of the pollutants in dye waste is rhodamine B, included in carcinogenic dyes and dangerous when exposed to living things. Method that can be used to overcome this problem is the adsorption method using activated carbon. Preparation of activated carbon from rubber fruit shells (Hevea brasiliensis) which was activated using H3PO…
The research on photodegradation of methylene blue dye using Bentonite-PDA-TiO2 has been done. Bentonite-PDA and TiO2 were synthesized with ratio comparison (1:1). The success of Bentonite-PDA-TiO2 synthesis were characterized using XRD, SEM-EDX, and UV-Vis DRS. The photodegradation proccess of methylene blue variables including the effect of concentration dye, contact time, and mass composite.…
The kipahit plant (Tithonia diversifolia) belongs to the Asteraceae family originating from South and North America which has bioactivity as anti-inflammatory, anti- fumigant, anti-viral, anti-diabetic and antibacterial. The antibacterial activity of extracts, fractions and isolated compounds against pathogenic bacteria that cause skin diseases such as Staphylococcus epidermidis and Streptococc…
Many palm oil processing factories will produce waste that has not been utilized optimally in the form of palm oil shells. Oil palm shell can be used as an adsorbent to overcome environmental problems. Lead metal is a type of metal that can pollute the environment, is toxic and includes the B3 heavy metal. Production of activated carbon from oil palm shells with variations in temperature and ty…