Browsing by Author "Farma, Rakhmawati"
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Item Binderless Composite Electrode Monolith from Carbon Nanotube and Biomass Carbon Activated by H2SO4 and CO2 Gas for Supercapacitor(2015-09-07) Deraman, Mohamad; Ishak; Farma, Rakhmawati; Awitdrus; Taer, Erman; Talib; Omar, RamliBinderless composite electrodes in the monolithic form prepared from carbon nanotubes (CNTs) and self‐adhesive carbon grains (SACG) from fibers of oil palm empty fruit bunch were studied as an electrode in a supercapacitor. The green monoliths (GMs) were prepared from three different types of precursors, SACG, SACG treated with 0.4 Molar H2SO4 and mixture of SACG and 5% CNTs (by weight) treated with 0.4 Molar H2SO4, respectively. These GMs were carbonized at 600 °C in N2 gas environment and activated by CO2 gas at 800 °C for 1 hour to produce activated carbon monoliths (ACMs). The properties of the ACMs (density, porosity, microstructure, structure and electrical conductivity) were found affected by CNTs addition and acid treatment. The acid treatment did not improve the electrochemical behavior of the ACMs used as electrodes (specific capacitance, specific energy and specific power of the supercapacitor) in the supercapacitor cells but CNTs addition improves the equivalent series resistance of the cell.Item Binderless Composite Electrode Monolith from Carbon Nanotube and Biomass Carbon Activated by KOH and CO2 Gas for Supercapacitor(2015-09-07) Farma, Rakhmawati; Deraman, Mohamad; Omar, Ramli; Awitdrus; Ishak; Taer, Erman; TalibThis paper presents a method to improve the performance of supercapacitors fabricated using binderless composite electrode monolith (BCMs) from self‐adhesive carbon grains (SACG) of fibers from oil palm empty fruit bunches. The BCMs were prepared from green monoliths (GMs) contain SACG, SACG treated with KOH (5 % by weight) and SACG mixed with carbon nanotubes (CNTs) (5% by weight) and KOH (5 % by weight), respectively. These GMs were carbonized at 800 °C under N2 environment and activated by CO2 gas at 800 °C for 1 hour. It was found that addition of KOH and CNTs produced BCMs with higher specific capacitance and smaller internal resistance, respectively. It was also found that supercapacitor cells using these BCMs as electrodes exhibited a better specific energy and specific power. The physical properties of BCMs (density, electrical conductivity, porosity, interlayer spacing, crystallite dimension and microstructure) were affected by the addition of KOH and CNTs.Item EFEK VARIASI KALIUM HIDROKSIDA PADA PENGAKTIFAN ARANG TEMPURUNG KELAPA TERHADAP KELEMBABAN(2016-01-30) Oktaviani, Tutik; Taer, Erman; Farma, RakhmawatiThe Carbon active made from piece coconut shell has been identified by using the chemical activation. This study aims to determine the value of the concentration of Potassium Hydroxide 1M, 2M, and 3M by activating coconut shell charcoal powder as humidity control. The Coconut shell Carbon is from the area Payakumbuh (Sumatera Barat) obtained from the local markets. Potassium Hydroxide (KOH) concentration used was 1, 2 and 3 M as chemical activation solution to activate the Carbon functional groups. The methods are Scanning Electron Microscope, Dispersive X-ray and X-ray Diffraction to investigate the morphology of the structure, content and degree of crystalline elements. For 2 hours, is found that the value of humidity is 84%, 81%, and 84%, in the range of 0-60 minutes, concentration 1 M, 2 M, and 3 M KOH respectively. It showed that there is feedback interaction with humidity value of 85%, 84% and 83%.Item Effect of carbonization temperature on the physical and electrochemical properties of supercapacitor electrode from fibers of oil palm empty fruit bunches(2015-09-07) Ishak; Deraman, Mohamad; Talib; Basri, Nur Hamizah; Awitdrus; Farma, Rakhmawati; Taer, Erman; Omar, Ramli; Dollah, Besek Nurdiana MohdSelf-adhesive carbon grains (SACG) was prepared from fibers of oil palm empty fruit bunches. The SACG green monoliths were carbonized in N2 environment at 400, 500, 600 and 700°C to produce carbon monoliths labeled as CM1, CM2, CM3 and CM4 respectively. The CMs were activated in CO2 surrounding at 800°C for 1 hour to produce activated carbon monolith electrodes (ACM1, ACM2, ACM3 and ACM4). The physical properties of the CMs and ACMs were investigated using X-ray diffraction, field emission scanning electron microscopy (FESEM) and N2 adsorption-desorption isotherm techniques. ACMs were used as electrode to fabricate symmetry supercapacitor cells and the cells’ performances were investigated using electrochemical impedance spectroscopy (EIS), cyclic voltammetry (CV) and galvanostatic charge-discharge (GCD) standard techniques. In this paper we report the physical and electrochemical properties of the ACM electrodes by analyzing the influence of the carbonization temperature on these propertiesItem Effect of Compression Pressure on the Physical and Electrochemical Properties of Activated Carbon Monoliths Electrodes for Supercapacitor Application(2015-08-18) Awitdrus; Deraman; Talib; Farma, Rakhmawati; Omar; Ishak; Basri; DolahGreen Monoliths (GMs) of self-adhesive carbon grain from fibers of oil palm empty fruit bunches were prepared by compression pressure at 1.43 × 107, 1.91 × 107 and 2.39 × 107 kg/m2, respectively. Activated carbon monoliths ACM-A, ACM-B and ACM-C prepared by CO2 activation from these GMs, respectively, were used as electrodes in supercapacitor cells which employed stainless steel 316L current collector and H2SO4 electrolyte. Evaluation of the electrochemical properties showed that ACM-A, ACM-B and ACM-C cells had specific capacitance of 30, 9 and 5 F/g, total ESR of 3.21, 4.95 and 7.33 Ω, specific power (maximum) of 173.41, 107.58 and 33.82 W/kg, and specific energy (maximum) of 0.67, 0.15 and 0.09 Wh/kg. These properties are directly associated with the surface area of the ACMs, i.e. 419, 336 and 302 m2/g for the ACM-A, ACM-B and ACM-C, respectively, indicating a direct effect of compression pressure on the physical and electrochemical properties of ACMs electrodes.Item Effect of electrolyte concentration on performance of supercapacitor carbon electrode from fibers of oil palm empty fruit bunches(2015-09-07) Farma, Rakhmawati; Deraman, Mohamad; Talib; Awitdrus; Omar, Ramli; Ishak; Taer, Erman; Basri, Nur Hamizah; Dollah, Besek Nurdiana MohdFibers of oil palm empty fruit bunches were used to produce self-adhesive carbon grains (SACG). The SACG green monoliths were carbonized in N2 environment at 800°C to produce carbon monoliths (CM) and the CM was CO2 activated at 800°C for 4 hour to produce activated carbon monolith electrodes (ACM). The physical properties of the CMs and ACMs were investigated using X-ray diffraction, field emission scanning electron microscopy and nitrogen adsorption-desorption. ACMs were used as electrode to fabricate symmetry supercapacitor cells and the cells which used H2SO4 electrolyte at 0.5, 1.0 and 1.5 M were investigated using electrochemical impedance spectroscopy, cyclic voltammetry and galvanostatic charge-discharge standard techniques. In this paper we report the physical properties of the ACM electrodes and the effect of electrolyte concentration on the electrochemical properties the ACM electrodesItem Effects of Activation Time on the Performance of Supercapacitor Binderless Activated Carbon Electrodes Derived from Fibers of Oil Palm Empty Fruit Bunches(2015-09-07) Ishak; Deraman, Mohamad; Dollah, Besek Nurdiana Mohd; Othman; Omar, Ramli; Basri, Nur Hamizah; Nor, Najah Syahirah Mohd; Taer, Erman; Awitdrus; Farma, Rakhmawati; AzizGreen monoliths (GMs) with different composition, labelled as GM1, GM2 and GM3, were prepared from self-adhesive carbon grains (SACG) produced from fibers of oil palm empty fruit bunches, SACG treated with 0.4 M H2SO4 and mixtures of SACG and carbon nanotubes (5 wt.%) treated with 0.4 M H2SO4, respectively. Each GMs was carbonized and then activated with holding time of 1 h and 2 h, respectively, to produce their respective activated carbon monoliths (ACMs). These ACMs were used as electrodes to fabricate supercapacitor cells using H2SO4 electrolytes, Teflon separator and stainless steel 316L current collector. The porosity of the ACMs, examined by nitrogen adsorption-desorption isotherm method were found affected after prolonging the activation time. From the electrochemical characterization of the ACMs electrodes using galvanic charge-discharge methods, it was found that supercapacitor cells fabricated using the ACMs produced by longer activation time (2 h) showed better performance, which had higher specific capacitance (113 F/g), specific power (159 W/kg) and specific energy (3.35 W h/kg), compared to the cells using ACMs produced by shorter activation time (1 h).Item Electrical Conductivity Of Carbon Pellets Prepared From Mixtures Of Pyropolymers From Oil Palm Bunches and Petroleum Green Coke(2015-09-07) Deraman, Mohamad; Awitdrus; Talib; Omar, Ramli; Jumali; Ishak; Saad; Taer, Erman; Saman; Farma, Rakhmawati; Yunusreen pellets (GPs), prepared at different compression pressures (cs = 6, 7.5 and 12 metric tonne) from mixtures containing self‐adhesive carbon grains (sacg) from the oil palm empty fruit bunch (EFB) and different percentages (pr = 0 to 90%) of a non self‐adhesive powder of petroleum green coke (ppgc), were carbonized (800° C) and activated with CO2 to produce carbon pellets (CPs). The measured electrical conductivity (σ) of the CP for all cs showed a curve having a minimum value at pr around 50%, indicating that the conducting phase displays a nonlinear σ‐ pr relationship. A significant increase in the σ due to CO2 activation was observed. For a sufficienctly high cs, an existence of a pr range in which the σ varies linearly with the density was also observed. These results provide some new information for modifying the electrical conductivity of carbon derived from the sacg from EFB or other types of biomass.Item Impedance spectroscopic analysis of composite electrode from activated carbon/conductive materials/ruthenium oxide for supercapacitor applications(2015-09-07) Taer, Erman; Deraman, Mohamad; Talib; Awitdrus; Farma, Rakhmawati; Ishak; Omar, Ramli; Dollah, Besek Nurdiana Mohd; Basri, Nur Hamizah; Othman; KanwalActivated carbon powders (ACP) were produced from the KOH treated pre-carbonized rubber wood sawdust. Different conductive materials (graphite, carbon black and carbon nanotubes (CNTs)) were added with a binder (polivinylidene fluoride (PVDF)) into ACP to improve the supercapacitive performance of the activated carbon (AC) electrodes. Symmetric supercapacitor cells, fabricated using these AC electrodes and 1 molar H2SO4 electrolyte, were analyzed using a standard electrochemical impedance spectroscopy technique. The addition of graphite, carbon black and CNTs was found effective in reducing the cell resistance from 165 to 68, 23 and 49 Ohm respectively, and increasing the specific capacitance of the AC electrodes from 3 to 7, 17, 32 F g-1 respectively. Since the addition of CNTs can produce the highest specific capacitance, CNTs were chosen as a conductive material to produce AC composite electrodes that were added with 2.5 %, 5 % and 10 % (by weight) electro-active material namely ruthenium oxide; PVDF binder and CNTs contents were kept at 5 % by weight in each AC composite produced. The highest specific capacitance of the cells obtained in this study was 86 F g-1, i.e. for the cell with the resistance of 15 Ohm and composite electrode consists of 5 % ruthenium oxide.Item Influence of gamma irradiation exposure on the performance of supercapacitor electrodes made from oil palm empty fruit bunches(2015-08-18) Nor, Najah Syahirah Mohd; Deraman, Mohamad; Omar, Ramli; Awitdrus; Farma, Rakhmawati; Basri, Nur Hamizah; Dolah, Besek Nurdiana Mohd; Mamat, Nurul Fatin; Yatim, Baharudin; Daud, Mohd Norizam MdCarbon-monolith electrodes for supercapacitors were prepared from GMs (green monoliths) made from pre-carbonized fibers of oil palm EFB (empty fruit bunches) and GMs of pre-carbonized EFB fibers exposed to gamma radiation at 5 kGy, 15 kGy, and 20 kGy. GMs and irradiated GMs were carbonized and activated to prepare ACM (activated-carbon-monolith) electrodes. The gamma radiation affected the pore structure of the ACM electrodes and the electrochemical performance of the supercapacitors; irradiation doses of 0 kGy, 5 kGy, 15 kGy and 20 kGy produced specific capacitances of 121 F g 1, 196 F g 1, 11 F g 1, and 12 F g 1, respectively. The irradiation dose of 5 kGy appears to be optimum and produces a specific power and specific energy of 236 W kg 1 and 5.45 W h kg 1, respectively, representing 34% and 60% increases over ACM electrodes prepared from non-irradiated GMs.Item Karakterisasi Partikel Pra-Karbon Dari Bunga Rumput Gajah (Pennisetum Polystachyon) Dengan Campuran Surfaktan Anionik Sodium Dodesil Sulfat Sebagai Bahan Dasar Superkapasitor(2015-12-28) Taer, Erman; Halim; Farma, Rakhmawati; Taslim, RTelah dilakukan penelitian tentang pembuatan partikel pra-karbon (PPK) berukuran nano meter dari bunga Rumput gajah. Proses pembuatan PPK menggunakan kombinasi metode ballmilling dan penambahan surfaktan anionik sodium dodesil sulfat serta diikuti dengan aktivasi kimia menggunakan KOH. Proses pra-karbonisasi dilakukan pada suhu 280 oC dan kemudian dilanjutkan dengan proses penggilingan dan pengayakan untuk mendapatkan ukuran partikel kecil dari 38μm. Tahapan selanjutnya sampel dicampur dengan surfaktan untuk dua konsentrasi yaitu: 0.5 M dan 1.5 M. Tahapan akhir pembuatan PPK menggunakan proses ballmilling dengan waktu milling selama 80 jam dan ditutup dengan aktivasi kimia menggunakan aktivator KOH dengan konsentrasi 0,7 M. Pengujian scaning electron microscope menunjukkan PPK yang dihasilkan dalam ukuran 100 s/d 200 nm. Pengujian dengan energi dispersiv sinar-X menunjukkan kandungan karbon pada sampel sebanyak 52%. Hasil pengujian difraksi sinar-X mendapatkan bahwa adanya puncak karbon pada sudut 2θ, yaitu 26,269o dan 45,347o yang menggambarkan unsur karbon dengan orientasi kristal (002) dan (100).Item Karakterisasi Sifat Fisika Karbon Aktif Tempurung Kelapa Dengan Variasi Konsentrasi Aktivator Sebagai Kontrol Kelembaban(2015-12-28) Taer, Erman; Oktaviani; Taslim, R; Farma, RakhmawatiTelah berhasil dilakukan peninjauan pengaruh beda konsentrasi aktivator KOH pada arang tempurung kelapa sebagai kontrol kelembaban. Konsentrasi KOH pada proses aktivasi arang tempurung kelapa divariasikan sebanyak 1 M, 2 M, dan 3 M. Proses aktivasi dilakukan selama dua jam pada suhu kamar. Selajutnya karbon teraktif dicuci menggunakan air suling hingga pH air cucian menjadi netral dan kemudian diikuti dengan proses pengeringan selama 24 jam pada suhu 100˚C. Pengujian sifat fisika yang dilakukan adalah pengujian morfologi permukaan, kandungan unsur dan derajat kristaliniti masing-masing menggunakan alat Scanning Electron Microscope, Energi Dispersif Sinar-X dan Difraksi Sinar-X. Karbon aktif tempurung kelapa dijadikan bahan pelapis ruang uji. Pengujian nilai kelembaban ruang uji dilakukan dengan rentang waktu 15 menit selama 2 jam. Nilai kelembaban pada akhir waktu 2 jam pengujian untuk karbon dengan kosentrasi 1, 2 dan 3 M KOH adalah sebesar 89%, 88% dan 85% . Penelitian ini memperlihatkan beda konsentarsi pengaktifan KOH pada karbon tempurung kelapa berpengaruh pada kelembaban ruang uji.Item A method to produce binderless supercapacitor electrode monoliths from biomass carbon and carbon nanotubes(2015-08-18) Dolah; Deraman; Othman; Farma, Rakhmawati; AwitdrusBinderless supercapacitor electrode monoliths (BSEM), prepared via the carbonization and activation of green monoliths from (a) self-adhesive carbon grains (SACG) from oil palm empty fruit bunch fibers, (b) SACG mixed with KOH, and (c) mixtures of SACG, KOH, and varying percentages of carbon nanotubes (CNTs), were characterized and evaluated in symmetrical supercapacitor cells. The porosity and the structural and microstructural characteristics of the electrodes are influenced by KOH and CNTs. The electrodes containing CNTs have a relatively lower specific capacitance but exhibit lower equivalent series resistance values and hence can sustain or improve the specific power of the cells, suggesting the need to optimize the quantity of CNTs used to sustain higher specific capacitance above 100 F/g. This innovative process uses inexpensive SACG with relatively small quantities of CNTs and KOH with no binder, and it directly combines both chemical (KOH) and physical (CO2) activation during the production of BSEM.Item Nanoporous separators for supercapacitor using activated carbon monolith electrode from oil palm empty fruit bunches(2015-09-06) Nor, Najah Syahirah Mohd; Deraman, Mohamad; Omar, Ramli; Taer, Erman; Awitdrus; Farma, Rakhmawati; Basri, Nur HamizahActivated porous carbon electrode prepared from fibres of oil palm empty fruit bunches was used for preparing the carbon based supercapacitor cells. The symmetrical supercapacitor cells were fabricated using carbon electrodes, stainless steel current collector, H2SO4 electrolyte, and three types of nanoporous separators. Cells A, B and C were fabricated using polypropylene, eggshell membrane, and filter paper, respectively. Electrochemical characterizations data from Electrochemical Impedance Spectroscopy, Cyclic Voltammetry, and Galvanic Charge Discharge techniques showed that specific capacitance, specific power and specific energy for cell A were 122 F g-1, 177 W kg-1, 3.42 Wh kg-1, cell B; 125 F g- 1, 179 W kg-1, and 3.64 Wh kg-1, and cell C; 180 F g-1, 178 W kg-1, 4.27 Wh kg-1. All the micrographs from Field Emission Scanning Electron Microscope showed that the different in nanoporous structure of the separators lead to a significant different in influencing the values of specific capacitance, power and energy of supercapacitors, which is associated with the mobility of ion into the pore network. These results indicated that the filter paper was superior than the eggshell membrane and polypropylene nanoporous separators. However, we found that in terms of acidic resistance, polypropylene was the best nanoporous separator for acidic medium.Item A New Empirical Equation for Estimating Specific Surface Area of Supercapacitor Carbon Electrode from X-ray Diffraction(2015-08-18) Deraman, Mohamad; Daik, Rusli; Soltaninejad, Sepideh; Nor, Najah Syahirah Mohd; Awitdrus; Farma, Rakhmawati; Mamat, Nurul Fatin; Basri, Nur Hamizah; Othman, Mohd Amir RadhiThe current trend of increasing research interest in supercapacitor is due to high demands for an energy storage device that can work in systems that require either low or high power-energy usage. In a supercapacitor using porous carbon electrodes, the energy storage mechanism involves the electrolyte ions in electrode pores and electronic charges in electrodes to form electric double layers at the electrode-electrolyte interface without undergoes any chemical reaction. The specific surface area of porous electrodes, which affect the performance of supercapacitor, have been widely investigated by many researchers using the nitrogen adsorption-desorption measurement. However, despite its simplicity, the X-ray diffraction method is rarely found being used to determine the specific surface area of porous electrodes. Therefore, in the present paper, we propose a new equation which expressed the specific surface area of electrodes as a function the electrode structural parameters obtained from the X-ray diffraction data, and duration of activation time employed during the electrode preparation. This equation is found to produce a satisfactory result and is expected to be beneficial for studying supercapacitor electrode materialsItem Pembangunan Superkapasitor Menggunakan Elektroda Karbon(2015-07-02) Taer, Erman; Awitdrus; Farma, Rakhmawati; Anita, SofiaSel Superkapasitor terdiri dari pengumpul arus {current collector), elektroda, pemisah (Separator) dan elektroiit. Elektroda karbon biasa diguneikan karena mempunyai sifat surface area yang tinggi, sifat listrik yang baik dan harga yang relatif murah. Sel superkapasitor mempunyai nilai kapasitan yang sangat tinggi bila dibandingkan dengan kapasitor konvensional. Elektroda karbon dapat dibuat dari bahan yang kaya akan lignoselulose. Serbuk gergaji kayu karet merupakan bahan pemula yang baik untuk sumber karbon. Serbuk pengergajian kayu karet akan mengalami proses pra-karbonisasi, pengilingan, pencetakan, karbonisasi, aktivasi, kemudian dilakukan penumbuhan nano partikel. Variasi tekanan, suhu karbonisasi dan aktivasi dilakukan untuk memporoleh optimasi sifat listrik yang baik (nilai tahanan yang rendah) untuk menjamin electrik series resistance (ESR) sel yang rendah dan sifat fisik yang sesuai (surface area) yang tinggi. Karakterisasi XRD, SEM dan BET dilakukan untuk mendukung sifat-sifat yang dikehendaki dapat diketahui. Hasil optimasi elektroda karbon akan digunakan untuk membangun sel supercapasitor dengan struktur Stainlesstel Current Colector/Elektroda karbon+Aguas Elektrolyte+Separator+Electroda karbon/ Stainlesstel Current Colector. Karakterisasi impedance dan Siklus Galvanic akan dilakukan sebagai investigasi nilai ESR dan prestasi cas dan discas sel.Item PEMBUATAN ELEKTRODA KARBON BERBASIS BIOMASSA AKAR ILALANG DENGAN PENGAKTIFAN KIMIA GANDA(Elfitra, 2023-04) Aflinaldi, M. Rizki; Farma, RakhmawatiZnO nanoparticles have been prepared through a biosynthetic method using microwave method with the addition of sulfur doping with percentage variations of 1 and 2%. Sulfur doping ZnO particles in the form of flakes from synthesis were characterized using UV-Vis spectroscopy and x-ray diffraction (XRD). The UV-Vis absorption spectrum shows absorption peaks in the UV region of 300-400 nm with bandgap energy ranging from 3.04-3.08 eV. XRD analysis exhibit the crystal size is in the range of 33 nm. The emerging plane peaks in the 30-80° angle range confirm wurtzite-shaped crystals with high purity of ZnO particles.Item PEMBUATAN ELEKTRODA KARBON SUPERKAPASITOR DARI BIOMASSA PELEPAH DAUN PINANG(Elfitra, 2022-07) Ananta, Anggoro; Farma, Rakhmawati; Taer, Erman; Rini, Ari SulistyoIn this study, supercapacitor electrodes were synthesized from areca leaf midrib biomass as a renewable carbon source. The process of making this supercapacitor cell electrode is through a pre-carbonization process, chemical activation, chemical carbonization in N2 gas and physical activation using CO2 gas. Analysis of the physical properties of the carbon electrodes showed that the sample had a density value of 0.637 g/cm3 or a percentage decrease of 36.55%. This study shows that betel leaf midrib biomass which has the potential to be used as carbon electrodes for supercapacitor cell applications.Item PENGARUH AKTIVATOR KIMIA TERHADAP KUALITAS KARBON AKTIF DARI KULIT SINGKONG SEBAGAI BAHAN PENYERAP LOGAM BERAT(2017-01-20) Situmorang, Tiur Malinda; Farma, RakhmawatiActivated carbon has successfully been made from cassava peel bunches prepared via pre-carbonisation process and microwave assisted KOH, NaOH and ZnCl2 activation. Irradiation was varied with the power of 540 Watt for 20 minutes. The physical properties of the activated carbon are characterized by analyzing it’s yield, absorption capacity. The yield of activated carbon to heavy metals, microstructure and surface morphology of activated carbon. activated carbon produced was 38%, 48,8% and 31,7% for each sample KAK, KAN and KAZ. Activated carbon absorption test against the best heavy metal showed that KAZ sample was the best with the percentage of heavy metal absorption of 95.46% Pb, 69,83% of Fe and 65,38% of Cu. The results of X-ray diffraction showed carbon active has a semi-crystalline structure with the presence of peaks sloping at an angle 2θ (002) and (100) of 21,501 o and 44,938 o. Characterization of surface morphology indicates that the sample KAZ generate more pores and regularity with the content of C atoms of 82,2%. The analysis showed that the quality of the samples KAZ activated carbon is better than KAK and KAN.Item PENGARUH KONSENTRASI AKTIVATOR ZnCl2 TERHADAP KUALITAS KARBON AKTIF DARI KULIT UBI KAYU UNTUK PENYERAPAN LOGAM BERAT(2017-01-20) Fitriyani, Ellis; Farma, RakhmawatiActivated carbon from cassava peel has been produced using chemical activation with Zinc Cloride (ZnCl2) as activator assisted by microwave irradiation with the output power 630 watt for 20 minutes. Concentration of ZnCl2 was varied 1M, 2M and 3M. The aim of this study to is determine the morphological characteristics, microstructure, contents of elements and the adsorption of activated carbon to the metal Fe, Pb and Cu. As whole, the result of calculating and analyzing the activated carbon showed that the activator consentration influenced the quality of activated carbon. aktivated carbon with concentration of ZnCl2 3M showed the best result with adsorption of activated carbon to Fe, Pb and Cu were 70,70%, 70,90% and 69,61% respectively.