DSpace Repository :: Browsing by Author "Sophia, Halida"

Browsing by Author "Sophia, Halida"

Now showing 1 - 17 of 17

ANALISIS XRD DARI ZSM-5 SEBAGAI HASIL SINTESIS DARI LEMPUNG ALAM MAREDAN
(2020-12) Sumiati, Sumiati; Sophia, Halida; Muhdarina, Muhdarina
Maredan clay contains SiO2 87.58% and Al2O3 11.226% which can be used in zeolite synthesis. ZSM-5 is porous material which is widely used in industrial scale as a catalyst and adsorbent. Synthesis of ZSM-5 was carried out using the hydrothermal method of dealuminated HCl 8 N metakaolin. Metakaolin was obtained by calcined Maredan clay for 6 h at a temperature of 700oC. Synthesis of ZSM-5 was carried out at a molar composition of 1.0 SiO2: 0.0067 Al2O3: 0.174 NaOH: 8 H2O: 0.07 PEG with variations in hydrothermal time of 12 and 24 h at a hydrothermal temperature of 140oC. The synthesis zeolite was characterized using XRD. The results of the analysis on the synthesis of ZSM-5 using HCl 8 N dealuminated metakaolin were similar to standard ZSM-5 peaks with a crystallinity of 5.54% formed at 24 h hydrotermal time.
APLIKASI FOTOKATALIS MnO/KARBON AKTIF DAN MnO/BENTONIT UNTUK DEGRADASI BIRU METILEN
(Elfitra, 2023-07) Syafitri, Ardhea; Awaluddin, Amir; Sophia, Halida
Photocatalysis is one of the alternative methods for treatment of textile waste. One of the synthetic dyes that is often used in the textile industry is methylene blue dye. The coloring process in textiles uses synthetic dyes in large enough quantities and is very stable so that it is difficult to degrade naturally. It is necessary to study the degradation process with effective and efficient methods in degrading methylene blue. The purpose of this investigation is to study the degradation methylene blue using MnO/Activated Carbon and MnO/Bentonite by photocatalyst method. The photocatalytic activity of MnO/Activated Carbon and MnO/Bentonite composites has advantages in the methylene blue degradation process both in acidic, neutral and alkaline pH conditions. Based on the results, it can be concluded that the optimum condition of the MnO/activated carbon composite for methylene blue degradation is at a catalyst mass of 35 mg, solution conditions at pH 9 and a methylene blue concentration of 50 ppm, the maximum degradation of methylene blue is 97.04%. The optimum condition of the MnO/Bentonite composite for methylene blue degradation is at a catalyst mass of 25 mg, solution conditions at pH 9 and a methylene blue concentration of 12.5 ppm, the maximum degradation of methylene blue is 83.69%.
DAYA ADSORPSI BIRNESSITE SINTESIS TERHADAP LARUTAN ION LOGAM Cd2+
(2013-03-07) Rofina, Ega; Awaluddin, Amir; Sophia, Halida
Birnessite can be used as an adsorbent of heavy metals found on the aquatic environment and solid waste. This could occur because birnessite is a porous material with a large surface area and are able to exchange cations from the solution. This research focuses on the removal of Cd ion from synthetic solution using the batch method. The removal Cd ions have been studed intensively for decade due to the toxic effect on environment and living organisms. To date, a number of methods have been developed to minimize the concentration of Cd ions in the environment, one of which is through adsorption method. The experimental results indicated that the synthetic birnessite has high affinity toward Cd2+ ion solution. To optimize the adsorption capacity of the birnessite, a wide range of experimental procedures are studied such as the differences of contact time, concentration, adsorbent weight, temperature, and pH. The uptakes of the ions by the adsorbent were monitored using atomic absorption spectroscopy (AAS) and were modelled using two types of isotherm adsorption. The thermodynamic parameters were calculated using the equation found in literature. The results showed that the optimum conditions for birnessite adsorption for Cd2+ ions are as follows: contact time of 5 minutes, pH of 6, optimum concentration of 8.4675 mg/L, temperature of 600C, adsorbent weigh of 0,5 gram with adsorption capacity of 95,63%. The adsorption Cd ions onto birnessite follows the Freundlich isotherm models. The adsorption is physical adsorption (physichsorps) with the value of ΔH and ΔS of 8,7713 kJ / mol and 1,9621 J / mol K, respectively. The positive value of ΔH indicates that the reaction is endothermic whereas positive ΔG (0,282 kJ / mol), shows the reaction is not spontaneous
KINERJA KATALIS MANGAN OKSIDA CRYPTOMELANE UNTUK DEGRADASI METILEN BIRU
(2016-10-19) Mulyati, Rike; Awaluddin, Amir; Sophia, Halida
Methylene blue (MB) is a useful dye, which is commonly used in texstil, paint and biology. Methylene blue is toxic to living organism because methylene blue in environment is difficult to degradation and requires a long time. Methods Advanced Oxidation Processes (AOP) has been applied succesfully to remove methylene blue. This research focuses on the use of manganese oxide cryptomelane structure to the degradation methylene blue using AOP tecnique. Manganese oxide was synthesized by sol-gel method using KMnO4 and citric acid. The characterization results X-ray diffraction (XRD) indicated manganese oxide obtained was cryptomelane. Scanning emission misroscopy (SEM) result sample has diameter of 2-10 μm and shape cotton. The best performance cryptomelane catalyst for degradation MB was using cryptomelane catalyst 100 mg, with the percent degradation methylene blue was 79.23% at 120 minutes.
OPTIMASI MASSA KOMPOSIT HIDROKSIAPATIT-KITOSAN TERHADAP ADSORPSI ZAT WARNA METHYLENE BLUE
(perpustakaan UR, 2021-08) Sawitri, Ariani; Sophia, Halida
Composites are two or more materials that macroscopically become a useful material. The purpose of this study was to synthesize hydroxyapatite-chitosan (HAp-C) composite using microwave irradiation heating method with NaH2PO4 precursor and adsorption test on methylene blue. The results of the analysis of the hydroxyapatite mineral phase showed the highest peak at 2ϴ= 33.989°, the functional group analysis showed the hydroxyapatite absorption band in the presence of OH-, PO4 3- and CO3 2- groups. Based on the results of adsorption of Methylene blue using a hydroxyapatitechitosan composite, the optimum conditions for the mass variation of 10% K-HAp-C adsorbent were 50 minutes, 30 ppm, and 5 grams with % Methylene blue adsorbed at 48.32%.
PENENTUAN KEMATANGAN MINYAK BUMI (CEUDE OIL) SUMUR MINYAK PETAPAHAN-KAMPAR, RIAU DENGAN MENGGUNAKAN PARAMETER ISOPRENOID
(2016-05-02) Fazlin; Tamboesai, Emrizal M; Sophia, Halida
In this study, crude oil samples from Petapahan were tested and characterized with isoprenoid parameters. Determination of thermal maturity level aims to determine the feasibility of petroleum wells to be exploited because there are many new wells of petroleum unexploited in the Riau area. Determination of maturity crude oil performed by analysis saturated fractions. Saturated fraction of the wells petapahan used to determine the maturity of crude oil based on parameters isoprenoid, n-alkane and carbon preference index were analyzed using gas chromatography-flame ionize detector (GC-FID). Based on the value Pr / Ph, Pr / n-C17, Ph / n-C18 and its CPI, the maturity level of petroleum from oil wells Petapahan, Langgak and Pendalian ripe with order levels of maturity and quality of the oil is oil Petapahan> Langgak> Pendalian as indicated by the value of Pr / Ph (2.29; 2.27; 2.29), the value of Pr / n-C17 (0.44; 0.57; 0.44), the value of Ph / n-C18 (0 , 20; 0.22; 0.25) and the CPI (1.095; 1.087; 1.069) respectively.
PENGARUH ION LOGAM TEMBAGA (Cu+2) TERHADAP DAYA ADSORPSI BIRNESSITE SINTESIS
(2013-03-07) Irmawati; Awaluddin, Amir; Sophia, Halida
Heavy metals can cause serious environmental problem such as the detereatom of water quality and natural resources, therefore there should be a way to reduce them. The effect of heavy metals on environment requires immedate solution, thus minimizing the adverse effect that may arise. The adsorption method in this study, the synthetic birnessites have been applied to reduce the Cu2+ ion concentration from the synthetic solution. To optimize the adsorption, processes of several parameter adsorptions, such contact time, concentration of solution have been investigated using batch method. The concentration of Cu2+ ions adsorped in the birnessite was monitored by atomic adsorption spectroscopy (AAS). The result showed that the optimum conditions for birnessite adsorption for Cu2+ ions are 10 minute for contact time, concentration 8,0913 mg/L with adsorption percentages 98%, at 600C and pH 6. The process of adsorption Cu2+ ions on birnessite follows the Freundlich isotherm types. The adsorption is physical adsorption (physichsorps) characterized with the value of ΔH positive that is 18,053 kJ/mol and ∆S of 74,2606 J/molK. The ΔH positive value indicated that the reaction is endothermic with ΔG negative (-4,448 kJ/mol), so if can be concluded the reaction is spontaneous
PENGARUH PENAMBAHAN DIOKTIL FTALAT SEBAGAI ZAT PEMLASTIS TERHADAP KARAKTERISASI MEMBRAN POLISULFON
(2014-05-21) Sophia, Halida; Radiman, Cynthia L
Polysulfone is one of the polymers frequently used in membrane preparation. Plysulfone membranes prepared by phase method shows a low mechanical strength when used in high pressure or self-supporting membranes. In order to improve the mechanical strength of membranes, dioctyl phthalate (DOP) was used as plasticizer. In his research, the membrane composition used were 18 % polysulfone (PSf),64 % dimetylacetamide and varied concentration of polyethyleneglycol (PEG) and dioctyl phthalate. The characterization included mechanical properties, hidrofility and morphology membranes. The showed that the presence of DOP in the membrane affected the membrane mechanical properties ; the optimum strength was 6.16 GPa Hidrofility Polysulfone membranes decrease. The morphology analysis by Scanning Electron Microscopy (SEM) showed the typical asymmetric structure where membranes skins had tiny pores and macro void structure in sub layer membrane
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.
PENGARUH WAKTU HIDROTERMAL PADA SINTESIS ZSM-5 (ZEOLITE SECONY MOBILE-5) DARI KAOLIN : MENGGUNAKAN TEMPLAT PEG (POLYETHYLEN GLYCOL)
(2020-10) Elverda, Yuniatha; Sophia, Halida
Kaolin as natural minerals contains silica and alumina therefore it is potential as basic material for synthesizing process of ZSM-5. This study aimed to carry out synthesizing zeolite from kaolin with addition PEG template by setting hydrothermal times from 24, 48 and 72 hours at a hydrothermal temperature of 140 °C. ZSM-5 synthesis was carried out at various ratio of SiO2/Al2O3 molar composition 150. Synthesis products were analized by XRD. The results showed that at hydrothermal times 24 hours and 48 hours were not produced ZSM-5, while at hydrothermal times 72 hours was obtained ZSM-5 with quartz impurities.
Peningkatkan Kualitas Minyak Goreng Curah Menggunakan Adsorben Lempung Desa Gema Teraktivasi H2SO4
(2016-04-22) Sophia, Halida; Mukhtar, Akmal
Telah dilakukan penelitian tentang peningkatan mutu minyak goreng curah menggunakan adsorben lempung asal Desa Gema, Kabupaten Kampar, Provinsi Riau. Penelitian ini meliputi: (1) Pembuatan adsorben dengan aktivasi menggunakan H2SO4 0,5 M, selama 3 jam dengan kecepatan pengadukan 500 rpm (2) Pemurnian minyak goreng secara adsorbsi dan mengetahui mutu minyak curah setelah adsorbsi berupa bilangan peroksida, bilangan asam, kandungan air, warna. Proses adsorpsi diamati dengan variasi massa (1, 3, 5, dan 7 gram) dengan waktu kontak 30 menit. Semua nilai yang diperoleh dibandingkan dengan SNI 3741:2013. Hasil yang didapat menunjukkan lempung teraktivasi H2SO4 mampu menurunkan bilangan peroksida, bilangan asam, dan kandungan air secara maksimal masing-masing sebesar 31,02%, 36,36%, dan 38,89% dengan 7 gram lempung teraktivasi.
PENURUNAN KADAR COD LIMBAH CAIR PABRIK KELAPA SAWIT MELALUI DEGRADASI OLEH KOMPOSIT α-MnO2/BENTONIT
(perpustakaan UR, 2021-09) Sukma, Ratih Mutiara; Awaluddin, Amir; Sophia, Halida
The high level of organic contaminants in Palm Oil Mill Effluent (POME) was reflected in its higher values of Chemical Oxygen Demand (COD), thus requiring a proper treatment before they could be released into an environment. The Fenton-based Advanced Oxidation Process (AOP) is considered to be the most effective and environmentally friendly method available and could be applied to overcome this issue. The method is based on the production of •OH via activation of H2O2 by a catalyst. The radical degrades most organic contaminants into CO2 and H2O if complete oxidation occurs. In this study, the cryptomelane-type manganese oxide was first synthesized via sol-gel method and was dipersed at different concentrations (5%, 10% and 15% by mass) on a commercial bentonite clay to generate α-MnO2/bentonite composite. The XRD results confirmed the presence of cryptomelane phase in the composite. The catalytic studies indicated that under optimum condition, 42,33% COD removal was achieved using 15% α-MnO2/bentonite after 60 minutes of degradation time.
Sintesis Dan Analisis Sifat Permukaan (Birnesite) Dan Pemanfaatan Limbah Ampas Tebu Sebagai Adsorben Untuk Menurunka Kandungan Asam Humat Dan Ion Logam Fe (Iii) Pada Air Gambut
(2015-04-22) Yanti, Pepi Helza; Awaluddin, Amir; Mukhtar, Akmal; Sophia, Halida
Mangan oksida sangat menarik untuk diteliti karena memiliki aplikasi yang sangat beragam. Aplikasi mangan oksida sangat erat kaitannya dengan struktur yang dimiliki oleh mangan oksida tersebut. Mineral mangan oksida terdiri atas berbagai struktur yaitu struktur berongga seperti hollandite, todorokite, cryptomelane, pyrolusite dan coronadite;struktur berlapis seperti busserite, birnessite, chalcophanite ,dan lithiophorite; serta struktur amorphous. Mangan oksida dengan bentuk struktur berongga seperti cryptomelane (2x2) dapat dimanfaatkan sebagai katalis, penukar ion, dan adsorben[1]. Mangan oksida berongga lainnya, dengan bentuk struktur rongga yang lebih besar adalah todorrokite. Todorrokite dengan ukuran rongga (3x3) memiliki luas permukan yang relatif besar (hingga 250 m2/g) sangat potensial digunakan sebagai katalis dan odsorben[2]. Mangan oksida dengan rongga paling kecil (1x1) adalah pyrolusite yang banyak digunakan pada industri gelas dan baterai. Mangan oksida dengan bentuk setruktur berlapis seperti birnessite dapat digunakan sebagai material penukar ion, material katoda untuk baterai lithium dan adsorben [3]. Birnesite juga digunakan sebagai prekursor yang digunakan dalam sintesis todorokite [4]. Pemanfaatan birnessite ini sangat ditentukan oleh sifat-sifat permukaan khas yang dimilikinya, seperti luas permukaan, morfologi, dari material birnessite. Namun demikian, salah satu permasalahan yang timbul adalah birnessite sulit ditemui dalam keadaan murni di alam, sehingga perlu analisis sifat permukaan digunakan birnessite yang telah disintesis. Sintesis mangan oksida dapat dilakukan dengan berbagai metoda, pada penelitian sebelumnya dengan menggunakan KMnO4 dan MnSO4 telah disintesis mangan oksida Holondite menggunakan metode hidrotemal [5], dengan metode yang sama prekursor Na-birnesite dan MgCl telah dihasilkan todorike [6]. Birnesite juga telah berhasil disintess dengan menggunaan KOH untuk mempelajari morfologi oleh mangan oksida berlapis dari cotton menjadi had platelike ]7]. Berdasarkan latar belakang di atas maka pada penelitian ini akan dilakukan sintesis dan analisis sifat permukaan mangan oksida –berlapis- dengan mengggunakan prekursor maltosa sebagai reduktor. Analisis terhadap sifat birnessite diamati terhadap karakterisasi, XRD, FTIR, TGA-DTA dan AAS.
SINTESIS KOMPOSIT MnO-BENTONIT MENGGUNAKAN METODE SOL GEL SEBAGAI KATALIS UNTUK DEGRADASI BIRU METILEN
(Elfitra, 2023-07) Maulana, Eric; Awaluddin, Amir; Sophia, Halida
Manganese oxide is one of the metal oxides that has been used as a catalyst to degrade various organic wastes. Among manganese oxide catalysts, manganese oxide MnO (manganosite) has not been widely studied and synthesized. In this study using bentonite as a support which aims to increase the catalytic activity of the MnO composite. This study aims to synthesize MnO-bentonite composites with various compositions of 5% and 15% MnO directly and indirectly using the sol-gel method which were then characterized using XRD and BET instruments to determine the crystal size, surface area and pore size of the MnO composite. -bentonite. To see the catalytic activity of the MnO-bentonite composite, we will test and see the degradation efficiency of methylene blue using a UV-Vis spectrophotometer. The results obtained from this research are that the type of MnO-bentonite composite that has good degradation efficiency is the directly synthesized MnO-bentonite composite with a composition of 15% with a mass variation of the composite 0.05 g; methylene blue initial concentration of 50 ppm and 15 mL peroxide volume with a degradation efficiency of 92.92%.
Sintesis Silika Gel Yang Berisi Garam Ni Secara Sol Gel Dan Uji Higroskopisnya
(2016-04-23) Sophia, Halida; Amran, Ali
The synthesis of silica gel using tetraethoxysilane has been researched with reactions of hydrolysis and polycondensation. The amount of water used as reactant will determine the degree of hydrolysis and condensation. For it will influence the abilty of higroskopic of silica gel. Synthesis of silica gel was conducted by reaction of tetraethoxysilane, ethanol, and variation on water volume from the salt hydrate Ni(NO3). 6 H2O. After transparent solid gel was dried at 40 o C xerogel was obtained.. Analysis that conducted for silica gel consist of gelation time,% loss of weight and higroscopic test. The result shown gelation time for gel silica that have contains Ni salt less than silica gel with H2O, % loss of weight for silica gel with Ni salt less than silica gel that have contains H2O, and silica gel with Ni salt have more higroscopic than silica gel that consist of H2O
SINTESIS ZEOLIT A DARI ABU LAYANG CANGKANG KELAPA SAWIT DENGAN METODE ALKALI FUSI HIDROTERMAL DAN UJI ADSORPTIVITAS TERHADAP ION TIMBAL(II)
(Elfitra, 2023-01) Saputra, Elias; Tamboesai, Emrizal Mahidin; Sophia, Halida
The aim of this study was to determine the characteristics of the synthesized zeolite A with variations in hydrothermal time and to determine the ability of the synthesized zeolite A to adsorb lead(II) ions. The synthesis of zeolite A was carried out using the alkaline hydrothermal fusion method with a Si/Al ratio of 1.25 and a variation of the hydrothermal time used for 4; 6 and 8 hours. The synthesized zeolite A was applied to adsorb lead(II) ions with several variations of adsorbent doses. Zeolite characterization was carried out by FTIR analysis. FTIR analysis to determine the functional groups of zeolite. The concentration of lead(II) ions was analyzed with an AAS instrument. The results of the FTIR analysis showed that all the synthesized zeolite products had O-Si-O groups, T-O strain asymmetry and double rings. The AAS results obtained the optimum adsorbent dose of the synthesized zeolite used to adsorb lead(II) ions at a dose of 0.2 gram with an adsorption capacity and adsorption efficiency of 22.9025 mg/g and 96.38%, respectively. Based on these results, it was concluded that zeolite A synthesized from oil palm shell fly ash has the potential as an adsorbent in adsorbing lead(II) ions.
SINTESIS ZEOLIT A DARI ABU LAYANG CANGKANG KELAPA SAWIT MENGGUNAKAN METODE ALKALI FUSI HIDROTERMAL DAN UJI ADSORPTIVITAS ION TEMBAGA(II)
(Elfitra, 2023-01) Citra, Tika Eka; Tamboesai, Emrizal Mahidin; Sophia, Halida
Fly ash is one of the organic wastes that has the potential as a base material for zeolite synthesis. Utilization of palm ash as a basic material for making zeolite is very potential considering its availability is quite large and sustainable. The purpose of this study was to determine the character of zeolite A as a result of synthesis by using a variation of the Si/Al ratio and the adsorption test for copper(II) ions. The synthesis of this zeolite uses the alkaline hydrothermal fusion method, with variations in the Si/Al ratio of 1.25; 1,5 and 2. Zeolite A synthesized was applied as an adsorbent in adsorbing copper(II) metal ions. The synthesized zeolite was characterized using FTIR, which showed that the zeolite has the O-T-O functional group, double ring and T-O asymmetric strain. The synthesized zeolite was then tested for its adsorption on copper(II) metal ions with time variation and characterized using AAS. Adsorptivity results show that the efficiency increases with the length of contact time. The average adsorption efficiency obtained is 86.97%. Based on these results, it can be concluded that zeolite A synthesized from oil palm shell fly ash has the potential as an adsorbent in adsorbing copper (II) ions..

Browsing by Author "Sophia, Halida"

Results Per Page

Sort Options