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SINTESIS BIODISEL MENGGUNAKAN KATALIS CaO CANGKANG KERANG DARAH: OPTIMALISASI TEMPERATUR REAKSI DAN KALSINASI KATALIS Zaidi Asyadiqi; Nurhayati '; Muhdarina '
Jurnal Online Mahasiswa (JOM) Bidang Matematika dan Ilmu Pengetahuan Alam Vol 1, No 2 (2014): Wisuda Oktober 2014
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Matematika dan Ilmu Pengetahuan Alam

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Blood cockle shells (Anadara granosa) can be used as heterogeneous catalysts for biodiesel production because it contains CaCO 3 that can be decomposed into CaO. In this study, blood cockle shells was calcined at temperatures of 800, 900 and 1000 oC for 10 hours. The synthesis of biodiesel was done by transesterification process of cooking oil and methanol. The condition variables for biodiesel synthesis studied were reaction temperatures (55, 60, 65 and 70 °C) and catalyst calcination temperatures (800, 900 and 1000 °C). The optimum of biodiesel results was 71.58 % with catalyst weight conditions of 4 % (w/w), the mole ratio of oil- methanol 1: 6, reaction temperature at 60±2 oC for 3 hours using catalyst calcination at 900 o C for 10 hours. Biodiesel obtained has a water content of 0.031 %, density of 870 kg/m 3 , viscosity of 3.63 mm 2 /s, flash point of 150 oC, carbon residue of 0.029 %, acid number of 0.23 mg KOH/g, iodine number of 50.26 g-I 2 /100 g and cetane number of 67.9. All of the characteristics of biodiesel correspond to the SNI for biodiesel (SNI 04-7182-2006).

LEMPUNG CENGAR TERAKTIVASI ASAM SULFAT SEBAGAI HASIL SAMPING PRODUKSI KOAGULAN: KARAKTERISASI Fiola Reviola; Muhdarina '; Nurhayati '
Jurnal Online Mahasiswa (JOM) Bidang Matematika dan Ilmu Pengetahuan Alam Vol 2, No 1 (2015): Wisuda Februari 2015
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Matematika dan Ilmu Pengetahuan Alam

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Cengar Natural clay was calcined at 700°C for 3 hours and the clay was extracted usingsulfuric acid with various of concentration (0.2, 0.4 and 0.6 moles) at 30 o C for 1 hour for liquid coagulant synthesis. The by product of liquid coagulant production was the sulfuric acid activated Cengar clay which have been used in this study. The sulfuric acid activated Cengar clay solids was heated at 230°C for 5 hours. The activated Cengar clay were characterized to determine the mineral types and ratio Si/Al. Characterization by X-ray diffraction (XRD) has shown a mineral of bassanite in clay at every moles of sulfuric acid, where as the types of clay mineral that only calcined at 700oC for 3 hours (LC700) were kaolinite, muscovite, monmorilonite, calcite and quartz. Ratio Si/Al in each of the sulfuric acid activated clays LC700-0,2, LC700-0,4 and LC700-0,6 were 7,76, 10,75 and 23,76, while non activated clay LC700 was 6,08. It is concluded that the activated clay was potential to be used as an adsorbent.

APLIKASI KOAGULAN CAIR HASIL EKSTRAKSI 0,4 MOL H2SO 4 UNTUK PENGOLAHAN AIR GAMBUT Catrain Susanty; Muhdarina '; Akmal Mukhtar
Jurnal Online Mahasiswa (JOM) Bidang Matematika dan Ilmu Pengetahuan Alam Vol 1, No 2 (2014): Wisuda Oktober 2014
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Matematika dan Ilmu Pengetahuan Alam

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Clay is an abundant natural product that has been used in various fields, one of them as a coagulant in water treatment. Cengar clay contains aluminium and iron that can be extracted to be liquid coagulant. The liquid coagulant was prepared through extraction of 500o C calcined Cengar clay by 0,4 mol of sulfuric acid at various temperatures (30,60, and 100o C) and extraction times (1, 2, and 3 hours). These coagulants were applied to coagulation process of peat water. Several parameters of peat water that were analyzed are turbidity, total dissolve solid (TDS), and total suspended solid (TSS). The turbidity result was compared to PERMENKES RI No. 416/MENKES/PER/IX/1990 “About Requirement and Water Quality Control”, whereas TDS and TSS were compared to Government Regulation No. 82 of 2001 “About Water Quality Treatment and Water Pollution Control” class I (raw drinking water). The result showed that liquid coagulants can fix all of peat water parameters that were analyzed. The optimum coagulant was K 60-3, made through extraction at 60o C for 3 hours, with removal percentage of turbidity was 82,69%; TSS 94,06%, and TDS 84,75%.

KAPASITAS ADSORPSI METILEN BIRU OLEH LEMPUNG CENGAR TERAKTIVASI ASAM SULFAT Alhusnalia Ramadhani; Muhdarina '; Amilia Linggawati
Jurnal Online Mahasiswa (JOM) Bidang Matematika dan Ilmu Pengetahuan Alam Vol 2, No 1 (2015): Wisuda Februari 2015
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Matematika dan Ilmu Pengetahuan Alam

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> Cengar clay activated sulfuric acid (LCA) was a residual solids synthesized liquid coagulant. LCA was obtained after calcination process at 700°C for 3 hours and activated with sulfuric acid 0.2; 0.4 and 0.6 mol. LCA has been used as an adsorbent for the adsorption of methylene blue dye aqueous solution. Methylene blue adsorption capacity was determined by the effect of stirring time and the concentration of the adsorbate. Through the Langmuir isotherm models it was obtained that the maximum adsorption capacity of methylene blue by LCA0,2; LCA0,4 and LCA0,6 was 2,0214 mg/g; 3,3955 mg/g and 3,8402 mg/g respectively with stirring time of 10 minutes and the optimum concentration 40 ppm. This LCA actually be able to remove methylene blue by 50.51% (LCA0,2); 53.53% (LCA0,4) and 77.74% (LCA0,6).

ADSORPSI KATION Pb (II) PADA LEMPUNG CENGAR TERAKTIVASI ASAM SULFAT : PENGARUH WAKTU KONTAK Rama Anggun Sari; Muhdarina '; Nurhayati '
Jurnal Online Mahasiswa (JOM) Bidang Matematika dan Ilmu Pengetahuan Alam Vol 1, No 2 (2014): Wisuda Oktober 2014
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Matematika dan Ilmu Pengetahuan Alam

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The adsorption ability of activated sulfuric acid Cengar clays (LC0.2, LC0.4 and LC0.6) has been studied using cation of Pb (II) in aqueous solution. The adsorption experiments were observed at each contact time i.e 5, 15, 30, 60, 70, 80, 90 and 120 minutes. All of the experiments were done at a temperature of 30°C and initial concentration of 20 ppm. The amount of Pb (II) adsorbed by the adsorbents was measured by Atomic Absorption Spectrophotometer (AAS). All data was then applied into kinetic models of the pseudofirst order, pseudo-second order and Elovich to determine the adsorption behavior. We found that 0.759, 0.799 and 0.827 mg g-1 Pb were adsorbed by LC0.2, LC0.4 and LC0.6 at 90 minutes contact time, respectively. All of the activated sulfuric acid Cengar clays which adsorbed Pb (II) cations according to pseudo second-order kinetics with k values (g mg -1 min -1 ) of each adsorbent were 0.156, 0.228 and 0.311, respectively. Fulfillment of the pseudo second-order models has indicated that the process occured was chemicaladsorption.

BIOARANG LIMBAH DAUN KETAPANG (Terminalia catappa L.) SEBAGAI ADSORBEN ZAT WARNA METILEN BIRU DALAM LARUTAN BERAIR Asnifa Yully; Muhdarina '; Nurhayati '
Jurnal Online Mahasiswa (JOM) Bidang Matematika dan Ilmu Pengetahuan Alam Vol 2, No 1 (2015): Wisuda Februari 2015
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Matematika dan Ilmu Pengetahuan Alam

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Terminalia catappa leaves waste is a biomass waste that can be found around campus of Riau University. After carbonization at various time at temperature of 300 ˚C, biocharcoal of Terminalia catappa leaves waste was used for the adsorption of methylene blue from aqueous solution. Parameters of contact time and concentration of the adsorbate were varied in order to determine the adsorption capacity. Water and ash content of biocharcoal of Terminalia catappa leaves waste were also identified. The results showed that the adsorption methylene blue each of biocharcoal was 4,3478; 6,0024 and 5,1281 mg/g at the carbonization time 30, 60 and 120 minutes respectively, with the initial concentration of 40 ppm and the adsorption time is 15 minutes. Water content of biocharcoal of Terminalia catappa leaves with carbonization time of 30 minutes, 60 minutes and 120 minutes was 2,74%; 2,84% and 1 ,67% respectively, while the ash content was 14%; 13% and 15% respectively.

PENGOLAHAN AIR GAMBUT MENGGUNAKAN KOAGULAN CAIR DARI LEMPUNG ALAM CENGAR Reza Syahroni; Muhdarina '; Amilia Linggawati
Jurnal Online Mahasiswa (JOM) Bidang Matematika dan Ilmu Pengetahuan Alam Vol 1, No 2 (2014): Wisuda Oktober 2014
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Matematika dan Ilmu Pengetahuan Alam

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Cengar clay is used as feedstock for the production of liquid coagulant. Liquid coagulant is used for improve peat water quality. Liquid coagulant was obtained by calcining clay at temperature 700 °C for 3 hours and leaching with 0.2 mol H 2 SO 4 . Variation of leaching conditions were selected at temperatures 30, 60, and 100 °C at 1, 2, and 3 hours. Then, liquid coagulant was used in peat water treatment processes with some parameters such as odor, color, pH, turbidity, TSS (Total Suspended Solid), TDS (Total Dissolved Solid), and dissolved organic acids. The results of peat water parameters after treatment were compared to PP No.82 of 2001 on Water Quality and Water Pollution Control and PERMENKES 416/ Health Minister/PER/IV/1990 about Drinking Water Quality. The results showed that almost all of liquid coagulants were capable to reduce of odor, turbidity, and TDS in peat water. However, one liquid coagulant type of K 100-2 can reduce peat water quality to be odorless, pH of 8,05, turbidity of 4 NTU, TDS of 278 mg/L, and TSS of 7 mg/L.

ESTERIFIKASI MINYAK GORENG BEKAS DENGAN KATALIS H2SO4 DAN TRANSESTERIFIKASI DENGAN KATALIS CaO DARI CANGKANG KERANG DARAH: VARIASI KONDISI ESTERIFIKASI Apriani Sartika; Nurhayati '; Muhdarina '
Jurnal Online Mahasiswa (JOM) Bidang Matematika dan Ilmu Pengetahuan Alam Vol 2, No 1 (2015): Wisuda Februari 2015
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Matematika dan Ilmu Pengetahuan Alam

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Fuel that becomes important requirement of Indonesian is more dwindling and will run out within the next 12 years. Therefore, the development of alternative fuels that are environmentally friendly is needed. One example of an environmentally friendly alternative fuel is biodiesel. This study aimed to synthesize biodiesel from used cooking oil by esterification and transesterification step and determine the optimum conditions. The parameters varied are the reaction esterification which weight of H2SO4 catalyst and mole ratio of oil:methanol, while temperature and reaction time was remained variable. Transesterification reaction parameters was remained variable. The analysis showed that the conversion of biodiesel was 70,35% obtained by the optimum condition of esterification was weight of H2SO4 catalyst was 3%, the mole ratio of oil: methanol was1:18, temperature was 70oC, and reaction time was 3 hours. Based on this results, it can be concluded that the used cooking oil can be used as raw material for biodiesel synthesis.

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