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    IDENTIFIKASI PENGARUH APLIKASI SUPERNATAN BEBAS SEL Lactococcus lactis ATCC 11454 TERHADAP PERUBAHAN NILAI pH FILLET AYAM BROILER
    (Elfitra, 2023-12) Khoirunisa, Eliza; Haryani, Yuli
    Broiler chicken is a commonly consumed food item in daily life, but it has a short shelf life due to the presence of highly nutritious components that facilitate bacterial growth. Lactococcus lactis ATCC11454 is a specific strain of lactic acid bacteria (BAL) frequently utilized in the food industry for its efficient production of nisin, a peptide known for its biopreservative properties in food products. The objective of this research is to evaluate the application of Cell-Free Supernatant (CFS) from Lactococcus lactis ATCC11454 on broiler chicken fillets concerning changes in pH values. Chicken fillets were coated with and without CFS from L. lactis ATCC11454, and then stored at two different temperatures. The percentage increase in pH values of fillets without CFS coating was higher compared to fillets with CFS coating.
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    SINTESIS PIRAZOLIN 5- (2-BROMOFENIL)-3-(1- HIDROKSINAFTALEN-2-IL)-1- FENIL-4,5-DIHIDRO-1H-PIRAZOL
    (Elfitra, 2023-12) Syafitri, Bella; Jasril
    Pyrazoline is five ring heterocyclic compounds with two adjacent nitrogen atoms which is known to have diverse biological activities such as antioxidant, antitumor and anticancer agent. The synthesis of pyrazoline (5-(2- bromophenyl)-3-(1- hydroxynaphthalene-2-yl)-1-phenyl-4,5-dihydro-1H-pyrazole begins with the formation of chalcone by reacting 1-hydroxy-2-acetyl naphthalene with 2-bromobenzaldehide using microwave irradiation method. The next step was reacted chalcone with phenyl hydrazine to produce target compound used sodium hydroxide catalyst with a monowave for 3 hours at a temperature of 80℃ and the resulting yield was 72%. The purity of the target compound was determined using TLC, melting point and HPLC. Analysis and confirming structure based on spectroscopic data of UV and FTIR.
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    STUDI ANTAGONISTIK Trichoderma asperellum LBKURCC1 DAN Penicillium sp. LBKURCC34
    (Elfitra, 2023-12) Nasution, Ariq Fadhil Shidiqi; Nurulita, Yuana; Rafi, Mohamad
    Trichoderma asperellum LBKURCC1 and Penicillium sp. LBKURCC34 are a fungi isolated from plantation soil and peat soil in Riau Province. This study aims to examine the antagonistic activity between local isolates of Riau fungi; LBKURCC1 and LBKURCC34. The aim of the antagonistic test is to measure and determine the ability of antagonistic fungi to suppress the growth and development of pathogenic fungi or fungi tested in close proximity to the laboratory scale co-culture method. Antagonistic tests can be carried out in vitro using the dual culture method. Antagonistic tests are carried out for 14 days and observations are made in control and test petris. In the antagonistic test, the LBKURCC1 fungus showed stronger antagonistic inhibition than the LBKURCC34 fungus.
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    PENGARUH PERLAKUAN AGING PADA PREPARASI ZEOLIT BERBAHAN DASAR LEMPUNG MAREDAN TERAKTIVASI ALKALI
    (Elfitra, 2023-12) Khasanah, Arbiyanti; Sophia, Halida; Sholeha, Novia Amalia
    Maredan clay is a natural material that has potential as a base material for zeolite synthesis. The purpose of this study was to determine the character of zeolite as a result of synthesis with aging treatment by using variations in hydrothermal time. This synthesis of zeolite uses the alkaline hydrothermal fusion method with variations hydrothermal times of 12, 18, 20, 24, 36 and 48 hours at a temperature of 100°C. XRD analysis showed of zeolite that there was dominant highest peak, namely zeolite sodalite and the presence of a peak Y. Crystallinity and sodalite crytal size was 20.17; 19.24; 23.45; 19.18; 25.04; 14.83% and 97.30; 69.68; 97.30; 69.68; 53.95; 69.68 nm. The crystallinity and crystal size of zeolite Y was 4.72; 4.39; 4.01; 3.51; 3.02; 2.64 % and 49.72; 71.17; 62.21; 71.17; 41.49; 41.48 nm. Based on these results, it can be concluded that Maredan clay has potential to be used as based material for zeolite.
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    EFEK WAKTU IRRADIASI MICROWAVE PADA SINTESIS KARBON AKTIF PELEPAH KELAPA SAWIT
    (Elfitra, 2023-12) Aulia, Anggi Dyang; Muhdarina
    The oil palm fronds contribute the highest biomass compared to other parts of the oil palm. The biomass of oil palm fronds were transformed into activated carbon through a carbonization process (at a temperature of 600°C for 60 minutes), resulting as charcoal, namely APS. Subsequently, the APS was chemically activated with KOH (APS : KOH ratio of 1:1 [w/w]) and physically activated under microwave irradiation (at times of 1, 3, and 5 minutes) at a power of 300 W, yielding activated carbons denoted as A1D300, A3D300, and A5D300. The moisture and ash content, as well as the iodine adsorption capacity of both oil palm charcoal and activated carbon were determined in accordance with the Indonesian National Standard (SNI) No. 06-3730-1995. Similarly, their respective yields were also assessed. The research results were found that yields, moisture content, and iodine adsorption capacity decrease with increasing irradiation time, whereas ash content tends to increase. The yield for each activated carbon was significantly greater than that of APS charcoal. In contrast to APS charcoal, all activated carbons meet the moisture, ash, and iodine adsorption capacity standards specified in the referenced SNI. Among them, A1D300 stands out as the most effective activated carbon from oil palm fronds, exhibiting a yield of 85%, ash and moisture content of 0.9% and 7.6% respectively, and an iodine adsorption capacity of 809.2 mg g -1 .
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    KARAKTERISTIK BIOCHAR PELEPAH KELAPA SAWIT PRODUK PIROLISIS PADA SUHU BERVARIASI
    (Elfitra, 2023-12) Ulfa, Amelia; Muhdarina
    The potential utilization of oil palm fronds as a raw material for biochar production is attributed to their composition of hemicellulose, cellulose, and lignin. This research is investigated the impact of pyrolysis temperature on the characteristics of the resulting biochar, adhering to the Indonesian National Standard (SNI) 06-3730-1995, encompassing parameters such as moisture content, ash content, volatile matter, and fixed carbon. Oil palm fronds were subjected to pyrolysis at varying temperatures of 500°C, 600°C, and 700°C for 60 minutes in a nitrogen gas stream. The research results was demonstrated that the pyrolysis temperature of oil palm fronds significantly influences the characteristics of moisture content, ash content, volatile matter and fixed carbon. The values were obtained exhibit an increasing trend with the elevation of temperature. The most optimal biochar identified in this study is designated as BPS500, featuring a moisture content of 0.76%, ash content of 6.85%, volatile matter content of 9.66%, and fixed carbon content of 82.71%, respectively. All these values align with the specifications outlined in the Indonesian National Standard (SNI) 06-3730-1995.
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    OPTIMASI WAKTU KONTAK DAN KONSENTRASI ADSORBAT PADA PENJERAPAN TIMBAL(II) OLEH LEMPUNG ALAM MAREDAN
    (Elfitra, 2023-12) Nazila, Alma; Mukhlis
    The application of Maredan natural clay as an adsorbent has several advantages, such as lower cost, abundant availability and good adsorption efficiency. In this research, Maredan natural clay was used to adsorb lead in water. The purpose of this research was determine the optimum contact time and optimum concentration of adsorbate, the adsorption isotherm and adsorption kinetics model of the adsorbent in lead adsorption process using Maredan natural clay. The adsorption used batch method with contact time variations of 10, 20, 30, 40 and 50 minutes and variations in adsorbate concentration of 40, 60, 80 and 100 ppm. The concentration of adsorbate adsorbed was determined using AAS. Characterization of the adsorbent before and after adsorption process was carried out using a FTIR instrument to determine the bond vibrations and functional groups of Maredan natural clay. The optimum contact time and adsorbate concentration of this research was obtained at 20 minutes and adsorbate concentration of 40 ppm, with adsorption efficiency of 77,02%. The adsorption isotherm for lead adsorption using Maredan natural clay was found to follow the Langmuir isotherm with R2 coefficient of 0,9314. The kinetic model of this research followed a second pseudo order kinetic model with and R2 coefficient of 0,9992.
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    KORELASI KEBASAAN PERMUKAAN DENGAN GUGUS FUNGSI ARANG AKTIF KULIT DURIAN
    (Elfitra, 2023-11) Seftiana, Zenifa; Muhdarina
    Durian skin waste (Durio zibethinus) which contains quite high levels of cellulose, lignin and carbon can be used as raw material for active carbon. In this research, the characteristics of active carbon synthesized from In this research, the characteristics of activated carbon synthesized from durian peel waste were studied using a furnace at a temperature of 700oC for 2 hours to obtain KADF and microwave at a power of 750 W for 75 seconds to obtain KADM. The characteristics of active carbon determined are basicity and surface functional groups. The results of the characterization show that the surface alkalinity of KADM activated carbon is higher than that of KADF. Likewise, the -O-H functional group in KADF is lost, while the other functional groups (C-H, C=C, C-O) show a lower percent transmittance compared to KADM activated carbon. These results show that physical activation using a microwave at 750 W for 75 seconds is better than using a furnace at 700 oC for 2 hours..
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    KORELASI KEBASAAN PERMUKAAN DENGAN GUGUS FUNGSI ARANG AKTIF KULIT DURIAN
    (Elfitra, 2023-11) Seftiana, Zenifa; Muhdarina
    Durian skin waste (Durio zibethinus) which contains quite high levels of cellulose, lignin and carbon can be used as raw material for active carbon. In this research, the characteristics of active carbon synthesized from In this research, the characteristics of activated carbon synthesized from durian peel waste were studied using a furnace at a temperature of 700oC for 2 hours to obtain KADF and microwave at a power of 750 W for 75 seconds to obtain KADM. The characteristics of active carbon determined are basicity and surface functional groups. The results of the characterization show that the surface alkalinity of KADM activated carbon is higher than that of KADF. Likewise, the -O-H functional group in KADF is lost, while the other functional groups (C-H, C=C, C-O) show a lower percent transmittance compared to KADM activated carbon. These results show that physical activation using a microwave at 750 W for 75 seconds is better than using a furnace at 700 oC for 2 hours.. Keywords: alkalinity, functional groups, carbon active
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    BIOSORBEN ARANG KULIT KAYU JABON PUTIH (Anthocephalus cadamba Miq.) UNTUK ADSORPSI ION LOGAM TIMBAL(II)
    (Elfitra, 2023-11) Sari, Yupita Yeni Puspita; Hanifah, T. Abu
    This research aims to determine the efficiency and adsorption capacity of adsorbents in adsorbing metal ions lead(II) at optimum pH optimization, optimum contact time, and concentration optimum adsorbate. White jabon bark in this study was converted into charcoal through a carbonization process with variations of temperature (400℃, 500℃, 600℃, 700℃, 800℃) and time variations of carbonization (30, 60, 90, 120 minute) for obtain the best condition of white Jabon bark charcoal which is used as lead(II) heavy metal adsorbent. Characterization of Jabon bark charcoal adsorbent white is carried out using an FTIR instrument, to analyze clusters functions that play a role in the adsorption process. Use of SEM-EDS for analyzing surface morphology and determining the elements contained therein white jabon bark powder and charcoal. The adsorbent characterization results show water content value 1.75%, ash content 13.72%, iodine adsorption capacity 519.12 mg/g and methylene blue adsorbed 64.7828 mg/g with a surface area of 240.1964 m2 /g. Adsorption The optimum occurs at a pH variation of 6, contact time of 40 minutes and initial concentration metals at 140 mgL-1 with adsorption efficiency of 99.89% respectively; 99.88%; 99.85%. FTIR results show that there is a CH bending functional group, C=C aromatic, C-N, C-H stretching aliphatic, C≡C, C=O carbonyl, and N-H groups. Results SEM-EDS shows the presence of the elements O, C, Ca, K, Mg and has a texture porous which is still covered with impurities because the activation process has not been carried out.
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    POTENSI BIOSORBEN KULIT SINGKONG (Manihot esculenta Crantz) TERAKTIVASI NaOH DALAM MENINGKATKAN pH DAN KUALITAS FISIK AIR GAMBUT
    (Elfitra, 2023-11) Patuanjaya, Yohansen; Anita, Sofia
    This research aims to analyze the effect of the cassava peel biosorbent powder activation process on the characteristics of the biosorbent powder, as well as determine the optimum contact time and optimum dose of biosorbent powder in increasing the pH and physical quality (color, odor, TSS and TDS) of peat water. The cassava peel biosorbent powder in this study was made through the process of drying the washed cassava peel, then grinding it to a size that passed at 100 mesh and was retained at 200 mesh. Biosorbent powder was activated using 0.4 N NaOH solution with a ratio of 1:10 (w/v). The functional groups of cassava peel biosorbent powder were analyzed using FTIR, while the surface morphology and elemental composition of cassava peel biosorbent powder were analyzed using SEM-EDS. Determination of the optimum contact time was carried out with variations in contact time of 30, 60 and 90 minutes. After obtaining the optimum contact time, then proceed with determining the optimum dose of biosorbent powder with a dose variation of 0.05; 0.10; and 0.15 g. Based on research, the optimum conditions for biosorbent powder after activation are a contact time of 60 minutes and a dose of 0.10 g of biosorbent powder. These optimum conditions have not been able to improve the color and odor of peat water, but have succeeded in improving pH, TSS and TDS when compared to Government Regulation No. 22 of 2021 concerning Implementation of Environmental Protection and Management.
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    PENGARUH BERAT KATALIS, WAKTU DAN SUHU REAKSI PADA PRODUKSI BIODIESEL MENGGUNAKAN KATALIS HETEROGEN CaO-SiO2 3% DARI LIMBAH CANGKANG KERANG DARAH DAN SABUT KELAPA
    (Elfitra, 2023-11) Risma, Yesika Ayu; Nurhayati, Nurhayati
    This research aims to synthesize biodiesel using a CaO catalyst from blood cockle shells impregnated with SiO2 from coconut fiber at a concentration of 3% w/w. The resulting catalyst was characterized using the Brunauer Emmett Teller (BET) method showing that the surface area of the 3% CaO-SiO2 catalyst had a higher area compared to CaO without modification. Scanning electron microscopy-energy dispersive x-ray spectroscopy (SEMEDX) had a rough surface morphology. and agglomerate and the main elemental composition of the 3% CaO-SiO2 catalyst is Ca, Si and O, and the basicity test of the 3% CaO-SiO2 catalyst has lower basicity compared to CaO. Biodiesel production is carried out by varying catalyst weight, temperature and reaction time with optimization using the Response Surace Methodology (RSM) design. Characterization of biodiesel produced from a 3% CaO-SiO2 catalyst has water content, specific gravity, viscosity and carbon residue which generally meets the quality requirements of SNI 7182-2015, except for the acid number.
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    SERBUK KULIT KAYU JABON PUTIH (Anthocephalus cadamba Miq.) BERLAPIS ASAM HUMAT DARI AIR GAMBUT UNTUK ADSORPSI ION LOGAM TIMBAL(II)
    (Elfitra, 2023-11) Windari, Sri Artika; Hanifah, T. Abu
    This research aims to determine the efficiency and optimum adsorption capacity for variations in pH, contact time, and adsorbate concentration of white jabon bark powder in the adsorption of lead (II) ions. White jabon bark powder was activated using NaOH in a ratio of 1:0, 1:1, 1:2, 1:3, 1:4, and 1:5 (w/w), which was characterized using iodine adsorption capacity and methylene blue adsorption capacity. The powder that is activated with the optimum NaOH ratio is then coated with humic acid from peat water. White jabon bark powder was optimized for pH parameters, contact time, and adsorbate concentration. The results of the characterization of determining the optimum NaOH ratio in this study showed that the iodine adsorption capacity in the ratio 1:3 (w/w) was 294.8037 mg/g and the methylene blue adsorption capacity was 21.3484 mg/g with a surface area of 79.1540 m2/g. The adsorption results obtained showed that the optimum conditions for Jabon bark powder were a pH variation of 4, a contact time of 30 minutes, and an adsorbate concentration of 140 mg/L with a biosorption efficiency of 99.47% and a biosorption capacity of 6.6043 mg/g. Based on the FTIR results, there are C-H, C-O, C-N, C=C aromatic, C-H stretching, and O-H functional groups. SEM-EDS results showed that jabon bark powder contained the elements C, O, Ca, K, Mg, Na, and Cl, and there were many impurities covering the pores of the powder. The powder surface looks cleaner and more open after activation.
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    BIOSORBEN ARANG AKTIF KULIT KAYU JABON PUTIH (Anthocephalus cadamba Miq.) UNTUK PENJERAPAN ION LOGAM TIMBAL(II)
    (Elfitra, 2023-11) Salma, Sherly Febrisa; Hanifah, T. Abu
    White jabon bark (Anthocephalus cadamba Miq.) has a high chemical content of cellulose and lignin so it has the potential to be used as an adsorbent to adsorb lead(II) metal ions. This research aims to determine the efficiency and adsorption capacity of white Jabon bark activated charcoal in adsorbing lead(II) metal ions, determine the kinetic model and adsorption isotherm. White jabon bark charcoal is made using a carbonization process at a temperature of 800℃ for 90 minutes and activated with a NaOH solution with varying ratios of charcoal and activator 1:1 ;1:2 ;1:3; 1:4 and 1:5 (w/ b). Characterization of activated charcoal refers to SNI 06-3730-1995. The functional groups of activated charcoal were analyzed using FTIR, the morphology of activated charcoal and the elemental composition of activated charcoal were analyzed using SEM-EDS. The concentration of lead(II) metal ions was analyzed using AAS. The charcoal yield obtained was 15.7247%. The results of the activated charcoal characterization showed that the water content was 1.23%, the ash content was 4.29%, the iodine adsorption capacity was 647,5453 mg/g and the methylene blue adsorption capacity was 24.3776 mg/g with a surface area of 90.3853 m2g. FTIR results show that the functional groups of white jabon bark activated charcoal are aromatic C=C, C=C stretching, C-H stretching aliphatic, C≡C, N-H and O-Pb. The best adsorption conditions were obtained at pH 6, contact time 40 minutes and adsorbate concentration 140 mg/L with an efficiency of 99.872% and an adsorption capacity of 6.623 mg/g. Based on the SEM-EDS test results, it is known that activated charcoal contains the elements C, O, Ca and P.
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    SINTESIS BIODIESEL DARI CRUDE PALM OIL (CPO) MENGGUNAKAN KATALIS MODIFIKASI CaO-SiO2 3% DARI CANGKANG KERANG DARAH DAN SABUT KELAPA DENGAN VARIASI BERAT KATALIS, KECEPATAN PENGADUKAN DAN RASIO MOL MINYAK : METANOL
    (Elfitra, 2023-11) Anggraini, Rika Yocherli; Nurhayati, Nurhayati
    CaO catalyst is a heterogeneous catalyst used in biodiesel synthesis. Modification of the CaO catalyst with porous materials such as silica (SiO2) was carried out to increase its catalytic activity. The aim of this research is to synthesize a CaO-SiO2 catalyst using the wet impregnation method with a weight of silica for CaO, namely 3% (w/w). The CaO-SiO2 catalyst was obtained from blood cockle shells and coconut fiber which were calcined at 700oC for 3 hours. The CaO catalyst before and after modification was characterized using X-Ray Fluorescence (XRF) to analyze chemical composition catalyst. The resulting catalyst was applied to the transesterification reaction for biodiesel production from Crude Palm Oil (CPO), which was optimized using Response Surface Methodology (RSM) with the independent variables catalyst weight, stirring speed and oil:methanol mole ratio. Based on the research results, the optimum biodiesel yield was obtained using a 3% CaO-SiO2 catalyst at reaction conditions of 60oC, reaction time of 90 minutes, catalyst weight of 3 g, stirring speed of 600 rpm, and oil:methanol mole ratio of 1:9 with a biodiesel yield of 94.39%.
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    APLIKASI SERBUK DAUN NANAS (Ananas comosus Morris) TERAKTIVASI NaOH SEBAGAI BIOSORBEN UNTUK MENINGKATKAN KUALITAS AIR GAMBUT
    (Elfitra, 2023-11) Natalia, Reanika Febe; Anita, Sofia
    This research aims to determine the characteristics of activated pineapple leaf powder and its ability to improve the physical quality of peat water which includes physical parameters such as color, odor, pH, TDS (Total Dissolved Solid) and TSS (Total Suspended Solid) values from peat water. Characterization of the active powder was carried out by testing the water content gravimetrically, testing the adsorption capacity of the active powder on methylene blue and testing the adsorption capacity of the active powder on iodine using the titration method. The results of the characterization of pineapple leaf powder after activation are that the water content is 0.53%, the adsorption capacity for iodine is 230.7869 mg/g and the adsorption capacity for methylene blue is 22.8138 mg/g. FTIR shows the results of hydroxyl O=H, C-H group which is from the cellulose structure, carbonyl C=O which indicates the presence of lignin, as well as the functional groups C=C and C-O on pineapple leaves powder. Based on the results of the SEM-EDS, it was found that the biosorbent pineapple leaves powder had the elements O, C, N, Si, Ca and had an uneven texture. The results obtained after adsorption process with pineapple leaves activated powder showed that pineapple leaf powder ware able to increase the pH in peat water, eliminate odors and reduce the TDS and TSS values in peat water, this is in accordance with Regulations Government of the Republic of Indonesia No. 22 of 2021.
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    PENGARUH DOSIS ADSORBEN TERHADAP PROSES ADSORPSI RHODAMINE B MENGGUNAKAN LEMPUNG MAREDAN
    (Elfitra, 2023-11) Riva, Putri Lala; Mukhlis, Mukhlis
    Clay is composed of alumina silicate minerals with a layered and porous crystal structure and can act as an adsorbent in adsorption processes. This research aims to determine the optimal adsorbent dosage (0.1; 0.3; 0.5; 0.7; 0.9 grams) in the adsorption process of Rhodamine B using natural Maredan clay. Characterization of Maredan clay was conducted before and after adsorption using Fourier Transform Infrared (FTIR) to identify the functional groups present in the adsorbent. The FTIR analysis of Maredan clay before and after adsorption revealed the presence of functional groups such as O-H stretching, Si-O, and Al-O-Si, with the addition of the C=C functional group after adsorption. The best condition was observed at an adsorbent dosage of 0.9 g, with an adsorption efficiency of 94.11% and an adsorption capacity of 2.6396 mg/g.
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    KINETIKA ADSORPSI ZAT WARNA METILEN BIRU PADA ARANG AKTIF KULIT DURIAN
    (Elfitra, 2023-11) Yulisa, Nadia; Muhdarina, Muhdarina
    Durian peel biomass has been widely studied as a source of activated charcoal because it contains cellulose. This study aims to determine the adsorption capacity and adsorption kinetics of durian peel activated charcoal adsorbent in adsorbing methylene blue. Durian peel charcoal was synthesized through a carbonization process with a kiln drum followed by physical activation using microwave with variations in irradiation time, namely 8 (A8KD), 10 (A10KD) and 12 (A12KD) minutes. The adsorbent with the highest adsorption capacity in adsorbing methylene blue was sample A8KD at 75 minutes contact time of 32.05 mg g-1. Based on the adsorption of methylene blue by durian peel activated charcoal, the suitable adsorption kinetics model based on the regression value (R2) close to 1 for all samples is pseudo second-order kinetics. The adsorption constant (k2) of methylene blue on activated charcoal A12KD is the fastest among other activated charcoal with k2: 0.0105 g mg-1 min-1 and R2: 0.951.
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    ARANG KULIT SINGKONG (Manihot esculenta Crantz) SEBAGAI ADSORBEN LOGAM TIMBAL(II)
    (Elfitra, 2023-11) Ginting, Nabilla Angeli Saputri; Anita, Sofia
    Cassava peel (Manihot esculenta Crantz.) has the potential to be used as an adsorbent in the form of carbon used in the adsorption process to remove lead (II) ions because of its cellulose content. This study aims to determine the ability of charcoal of cassava peel in absorbing lead (II) ions. charcoal of cassava peel made by carbonization at 300°C for 120 minutes. The result showed that the with the characterization result were 2.61% of water content, 9.13% of ash content, 428.6188 mg/g of iodine number, 20.4336 mg/g of methylene blue number. Charcoal of cassava peel applied to adsorb lead (II) ion with many variations of dose adsorbent and contact time. Charcoal from cassava peel before and after adsorption of lead (II) ion analyzed by Fourrrier Transform Infra-Red (FTIR) instrument. The concentration of lead (II) ion before and after adsorption analyzed by ICP-Optical Emission Spectrophotometer (ICP-OES) instrument. Based on this study, the optimum dose of charcoal of cassava peel used in absorbing lead (II) ions of 1.5 g with an adsorption efficiency of 97.87% and adsorption capacity of 49.9160 mg/g. The optimum contact time occured at 30 minutes with an adsorption efficiency of 97.13% and adsorption capacity of 49.9160 mg/g. It concluded that arang of cassava peel is potential as an adsorbent of lead (II) ions.
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    KARAKTER UMUM ARANG KULIT DURIAN YANG DISEDIAKAN SECARA KARBONISASI
    (Elfitra, 2023-11) Lestari, Mira; Muhdarina, Muhdarina
    The biomass of durian peel has been transformed into charcoal on a laboratory scale. This research aims to study the characteristics of charcoal obtained from the carbonization process inside a furnace at a temperature of 300ºC with durations of 30, 60, and 90 minutes, namely AKD 30, AKD 60, and AKD 90. The produced characteristics are characterized, including yield, moisture content, ash content, charcoal surface acidity, and methylene blue adsorption, respectively. Increased the carbonization time causes the water content and surface aciditiy to decrease, but the ash content increased, while the adsorbed methylene blue was quite variable. AKD 30 is better charcoal than the other two charcoals, although it is still below SNI standard 06-3730-1995.