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All Journal Jurnal Natur Indonesia Jurnal Online Mahasiswa (JOM) Bidang Matematika dan Ilmu Pengetahuan Alam Indonesian Journal of Chemistry Akta Kimia Indonesia JURNAL PHOTON EcoNews
Amilia Linggawati
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Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Environmental Science Mathematics Nursing Physics

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Journal : Jurnal Online Mahasiswa (JOM) Bidang Matematika dan Ilmu Pengetahuan Alam

 1 
SINTESIS DAN KARAKTERISASI MEMBRAN BIONANOKOMPOSIT SELULOSA BAKTERI-Ag SEBAGAI MEMBRAN ANTIBAKTERI Dwi Cahyaningsih; Andi Dahliaty; 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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Abstract

Bacterial cellulose is a potential biopolymer that can be used in the medical field as an antibacterial membrane. Antibacterial membrane was synthesized from bacterial cellulose that was composited with silver nanoparticle that has antibacterial activity. Silver nanoparticles were impregnated into bacterial cellulose membrane to produce bacterial cellulose-Ag bionanocomposite membrane. Synthesis of silver nanoparticles was performed using reduction method with various concentrations of AgNO3 as precursor (0.5 mM, 1 mM, 1.5 mM) and sodium citrate as reducing and stabilizing agent. Bacterial cellulose-Ag bionanocomposite membrane was characterized by Scanning Electron Microscopy-Energy Dispersive X-Ray Spectroscopy (SEM-EDX). The results of SEM-EDX characterization showed that bacterial cellulose-Ag bionanocomposite membrane with AgNO3 0.5 mM has smallest size of silver nanoparticles (30-60 nm) and distributed homogeneously in the bacterial cellulose membrane. Antibacterial test against Staphylococcus aureus and Escherichia coli was carried out by the agar diffusion and turbidimetry method. Bacterial cellulose-Ag bionanocomposite membrane did not show antibacterial activity in the agar diffusion method. In turbidimetry method, bacterial cellulose-Ag bionanocomposite membrane with AgNO3 0.5 mM showed antibacterial activity against Staphylococcus aureus and Escherichia coli. It was able to decrease Optical Density of Staphylococcus aureus (26,69%) and Escherichia coli (22,91%) compared to controls.
PRODUKSI BIODIESEL DARI CPO DENGAN PROSES ESTERIFIKASI DENGAN KATALIS H2SO4 DAN TRANSESTERIFIKASI DENGAN KATALIS CaO DARI CANGKANG KERANG DARAH Tengku Ryhaan Permata Sari Devi; Nurhayati '; 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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Abstract

Biodiesel is one of alternative fuel to replace diesel that was derived from petroleum. The objective of this research is to optimize biodiesel production from CPO raw material through esterification reaction catalyzed with H2SO4 and transesterification catalyzed with CaO originally from blood cockle. The esterification reaction was carried out with the weight variation of the catalyst and mol ratio of oil to methanol. Before performing biodiesel synthesis the water content and free fatty acid (FFA) were determined. Water content obtained was 0,4% and FFA was 5,0187%. The maximum biodiesel produced was 77,93% that was obtained from reaction by 2%wt H2SO4 catalyst with mol ratio of oil to methanol 1:24.
PENGGUNAAN KOMPOSIT KARET ALAM-ARANG AKTIF-PASIR COR UNTUK MENGURANGI KANDUNGAN NITRAT DALAM LARUTANNYA Dyah Ayu Anggraini; Tengku Ariful Amri; 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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Composite is a material made up of two parts, binder (matrix) and filler. This material is widely used in human activities  as water purification media. Composite materials  that used in this study consist of natural rubber as a matrix with filled activated charcoal and sand cast. The composition of the composite is 0% sand  : 100% charcoal (KA), 50% sand : 50% charcoal (KAP), 100% sand : 0%  charcoal (KP). These composites are used to reduce the nitrate content in the nitrate solution  which  have  initial concentration of 5 and 10 ppm. Nitrate contents  before and after passing the composite were analyzed using Brusin sulfate  method. The results showed that the composite rail is more effective at reducing nitrate solution which has initial concentration of 10 ppm at 30o C. In these conditions the composite KA can  reduce the high nitrate content  to 73.38%, while the KAP and KP  can  only reduce nitrate  content  of 69.75% and 53.88% respectively.
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).
PRODUKSI BIODISEL DARI MINYAK GORENG BEKAS MENGGUNAKAN KATALIS CaO CANGKANG KERANG DARAH KALSINASI 900 °C Rini Setiowati; Nurhayati '; 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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Biodiesel is one of the most potential alternative energy for diesel machine since it isrenewable and environmental friendly. Biodiesel can be produced by transesterificationreaction of vegetable oil or animal fat with alcohol and catalyst addition. In this study,biodiesel was produced by transesterification reaction of waste cooking oil andmethanol using a CaO catalyst of blood cockle shells (Anadara granosa). Blood cockleshells (Anadara granosa) can be used as heterogeneous catalysts for biodieselproduction because it contains CaCO 3 that can be decomposed into CaO.Decomposition of the blood cockle shells as heterogeneous catalyst for biodieselproduction was carried out at 900 oC for 5 hours. The yield of biodiesel optimum was81.67% with 3% weight of catalyst, 1:15 of oil and methanol mole ratio, 3 hours ofreaction time and 60±2 oC of reaction temperature.
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.
Co-Authors -, Zaiyar Alhusnalia Ramadhani Amir Awaliddin Amir Awaluddin Andi Dahliaty Anita, Sofia Awaliddin, Amir Dwi Cahyaningsih DYAH AYU ANGGRAINI Elvi Syahrina Mirna Ilza Muhdarina ' Muhdarina - Muhdarina Muhdarina NURHAYATI ' Nurhayati Nurhayati Nurhayati Nurhayati Nurhayati Nurhayati Pepi Helza Yanti Reza Syahroni Rini Setiowati Rosa Murwindra, Rosa Saryono Saryono Sikumbang Saryono, M.Or. S.Pd. Jas. Siregar, Siti Saidah Syahrina, Elvi SYAIFUL BAHRI T. Ariful Amri Tengku Ariful Amri Tengku Ariful Amri Tengku Ryhaan Permata Sari Devi Yulianti Yulianti Zaiyar -