Adsorption Kinetics Study of Cr (III) Metals Using Activated Natural Zeolite

Several methods have been developed to reduce and minimize the presence of copper heavy metals that pollute waters, such as by adsorption method, is one of the natural zeolite material is widely used as an adsorbent. Natural zeolites have potential as adsorption heavy metals in waste water treatment due to adsorption capacity and high selectivity, long-lived, and the numbers are abundant in Indonesia. Research studies of metal adsorption kinetics of Cr (III) with activated natural zeolite aims to determine a suitable kinetic model for metal adsorption kinetics of Cr (III) with activated zeolite adsorption evaluate the metal Cr (III) and the effect of temperature on the adsorption rate constant. This study begins with the activation of natural zeolite in physics and chemistry and to be continued to Cr (III) metal adsorption by activated natural zeolite with a variety of contact time and temperature. Results spectrophotometer adsorption measured using atomic absorption (AAS). From the research that has been done shows that a suitable model for the kinetics of adsorption of metal Cr (III) with zeolite activated following the model of first order with a value of k= 0,011 min-1 for a temperature variation of 300C, 400C, 500C. From the results obtained conclude that the higher the temperature will be faster the rate of adsorption and the amount of activation energy values obtained in the amount of 296,73 J/mole, which means that the adsorption process takes place in physics

Penentuan Massa dan Waktu Kontak Optimum Adsorpsi Karbon Aktif dari Ampas Tebu sebagai Adsorben Logam Berat Pb

Bagasse is one of the agricultural or industrial waste that can pollute the environment. One effort to improve the economic value of the bagasse can be done with the process into activated carbon. This study aimed to examine the mass effect of activated carbone and the time contact of the bagasse activated carbon adsorption used for heavy metal Pb adsorbent, and to study the characteristics of the activated carbon produced, among others, ash content and moisture content. This research was conducted in three phases were the raw material preparation, the manufacture of activated carbon, and the adsorption of Pb in PbSO4 solution. Variations in the mass carbone used in this study were 1; 2; and 3 gram. As for the time variation adsorption used were 30; 60; 90; and 120 minutes. Percent adsorption is best obtained when the mass of activated carbone of 3 grams and the optimum time contact of 90 minutes is equal to 94,15 %

Pembuatan Karbon Aktif dari Kulit Durian sebagai Adsorbent Logam Fe

Durian peel is known as the waste that can pollute the environment. One effort to improve the economic value of the durian skin can be done with the process into activated carbon. This study aims to obtain optimum conditions for the use of activators of Kaliaum Hidroksida on the quality of activated carbon and activated carbon absorption of Fe metal. Activated carbon is made via two processes, namely the process of carbonization and activation at 320oC temperature with a solution of Kalium Hidroksida by varying the massa aktif carbon1, 1.5, 2, 2.5, dan 3 gr and adsorb time30, 60, 90, dan 120 menit. To determine the quality of activated carbon, activated carbon characteristics tested, such as moisture content, ash content, and the absorption of iodine. The results showed that the characteristics of activated charcoal SNI 06-3730-1995 meets the standards the water content of 14.12%, 5.46% ash content and absorption of I2 solution of 580.27 mg / g in adsorbing metals Fe. Application of Fe metal adsorption by activated carbon from durian skin with 3 grams of carbon mass variation and contact time of 90 minutes where the adsorption efficiency is 96.75%

Pengaruh Konsentrasi Tween 80 pada Sakarifikasi dan Fermentasi Serentak Pati Sorgum Menjadi Bioetanol

The growing energy needs of Fuel (BBM) in the world are experiencing the limitations of the natural resources of raw materials in the form of fossil fuels are declining. To meet the needs of fuel need to be developed for non-fossil fuels. One type of vegetable fuel (BBN) is bioetanol. Raw materials that are potentially as bioetanol one is sweet sorghum (Sorghum bicolor l. Moench). Starch sorghum can be converted into glucose and then by using the help of microorganisms are converted into bioetanol. The methods used in this research is the process of sakarifikasi and the fermentation is done simultaneously (SSF) in 2-Litre fermenters. Sampling is conducted during the process of hidrolisa by using StargenTM enzyme and fermentation at specific time intervals to analyze levels of ethanol and sugar levels. Test your sugar levels reduction done by the method of Nelson-Somogy, alcohol concentration testing using the tool alkoholmeter. The purpose of this study was to determine the influence of the concentrations of Tween 80 and the fermentation time against levels of ethanol produced. Starch fermentation process conditions of sorghum with the variation of the concentrations of Tween 80 (0.5%; 1%; 0.9%; 2% and 2.5%) at each sampling time (36; 24; 48; 60, 72 and 96 h). The fermentation process takes place in the anaerobic conditions of operation pH (4.5) speed of 200 rpm and pengadukkan at room temperature. The best fermented indicated on condition of addition of enzyme concentration of 2.5%, the fermentation time 72 hours with the resulting ethanol concentration of 8% (v/v)

Pemurnian Bioetanol Hasil Fermentasi Nira Nipah Menggunakan Proses Destilasi-Adsorpsi Menggunakan Adsorben Silica Gel

The rapid rate of world population growth conduces demand and supply of fuel is not balance. So that, energy reserves has been depleted in large numbers. Especially fossil fuels which is a main energy. The government has compiled program and policy for development of bioethanol and biodiesel to resolve energy crisis in Indonesia which targeted in 2025 can be approximately 15-20% fuels need to fulfill transportation sector and the national industry. This research aims to produce bioethanol fuel grade-adsorption using distillation methods, determine the effect of the ratio of silica gel: bioethanol and height of the adsorbent in the column for producing bioethanol fuel grade. The raw material is bioethanol from nipa sap fermentation results with 13% ethanol content. Ethanol content obtained not too high previously, so that should be took a process that can be increase the purity of bioethanol with distillation process-adsorption. This research divided into two stages. First stage is nipa sap bioethanol distiled up to 96% concentration and second stage is distillation-adsorption using silica gel adsorbent. Independent variables on this research is ratio of silica gel : bioethanol and height of adsorbent in the adsorption column. The most influence process to review bioethanol purification is distillation-adsorption silica gel with ratio: ethanol 1:2 and a height of adsorbent in the column is 3.5 cm with purity of 99,6% and had been categorized fuel grade bioethanol

Kesetimbangan Adsorpsi Logam Fe (II) Menggunakan Karbon Aktif dari Ampas Tebu sebagai Adsorben

Bagasse is a by-product from pressing liquid sugar. One of the efforts to control the bagasse is processed into activated carbon. This study aims to activated carbon from bagasse, study the effect of Fe (II) concentration on activated carbon from bagasse and adsorption equilibrium model. Processing bagasse into actived carbon carbonization process is carriedout at a temperature of 320 °C for 2 (two) hours. After that activated with KOH ratio 3:1. 2 grams of activated carbon was added to the beaker containing the solution of Fe (II) atvarious concentration (20; 30; and 40 ppm), and the reaction temperature (40; 50; and 60 °C). The results showed that activated carbon adsorption for 20 ppm and 40 °C is 90,80%,followed equilibrium Freundlich and Langmuir isotherm models (with regretion 0,986 and0,985) and the heat of reaction of 2,24 kcal/mol°K

Pemurnian Bioetanol Hasil Fermentasi Nira Nipah Menggunakan Proses Destilasi-Adsorpsi pada Variasi Rasio Adsorben dengan Modifikasi

Bioethanol is used in the fuel mixture to the vehicle must be anhydrous so as not to cause corrosion in the engine, so that bioethanol should have a grade of 99% -100%. One of the main problems in the process of making bioetanol is the process of separation water with ethanol to get ethanol dry ( 99,95 % ). Purification of ethanol is usually done by distillation, but the distillation process has the disadvantage because of the azeotrope so hard to get dry ethanol. One method that is cheaper and easier is by distillation-adsorption using porous media. This study aims to obtain bioethanol from nypa using distillation purification process-adsorption using bentonite pellets, to obtain comparative data on the adsorption ability of bentonite pellets and data additions optimum starch and characterize the physical properties of bioethanol and qualitative test with GC. This research was conducted in several stages of the preparation of bioethanol, activation of bentonite, bioethanol purification by distillation-adsorption process, and product analysis. Variations of ratio adsorbent: bioethanol 1: 2, 1: 3, and 1: 4, and variations of the addition of starch varied namely 30, 35, 40 and 45% of the weight of bentonite, process temperature 78 °C, the activation of bentonite in physics. From the research results, obtained by the process of distillation-optimum adsorption with activated bentonite adsorbent physics with the addition of 35% starch with a ratio of 1: 2. Ethanol levels increased from 96% to 99.8% volume