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All Journal IJFAC (Indonesian Journal of Fundamental and Applied Chemistry) JPSriwijaya Jurnal Penelitian Sains Molekul: Jurnal Ilmiah Kimia ASEAN Journal of Chemical Engineering Makara Journal of Science
Widia Purwaningrum
Department Of Chemistry, Faculty Of Mathematics And Natural Sciences, Sriwijaya University, Indralaya, Sumatra Selatan, 30662, Indonesia Research Centre Of Advanced Material And Nanocomposite, Sriwijaya University, Indralaya, Sumatra Selatan, 30662,
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Economics, Econometrics & Finance Education Energy Engineering Environmental Science Law, Crime, Criminology & Criminal Justice Mathematics Neuroscience Physics Public Health

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Studi Interferensi Besi dan Krom terhadap Analisis Nikel secara Spektrofotometer Atom dan Aplikasinya pada Limbah Elektroplating Seng Nova Yuliasari; Widia Purwaningrum; Frisca Yanti Sialagan
Jurnal Penelitian Sains Vol 16, No 1 (2013)
Publisher : Faculty of Mathtmatics and Natural Sciences

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (156.176 KB) | DOI: 10.56064/jps.v16i1.81

Abstract

Penelitian studi pengaruh gangguan besi (Fe) dan krom (Cr) dalam analisis nikel (Ni) secara spek-trofotometer serapan atom dan aplikasinya pada limbah elektroplating seng telah dilakukan. Pengolahan data dilakukan secara statistik analisis variansi menggunakan rancangan faktorial dengan taraf kepercayaan 95 %. Variasi konsentrasi masing-masing Fe dan Cr adalah 0 ppm; 50 ppm; 500 ppm; 1.000 ppm dan 5.000 ppm da-lam larutan Ni 3,0 ppm. Gangguan spektral cenderung terjadi pada konsentrasi Fe 5.000 ppm terhadap pem-bacaan konsentrasi Ni. Konsentrasi Fe dibawah 5.000 ppm tidak terbukti berbeda nyata memberikan penga-ruh terhadap pembacaan konsentrasi Ni, sedangkan Cr terbukti memberikan pengaruh yang berbeda nyata terhadap pembacaan konsentrasi Ni. Interaksi variasi konsentrasi Fe dan Cr terbukti memberikan pengaruh yang berbeda nyata terhadap pembacaan konsentrasi Ni. Uji BNT menunjukkan perbedaan pembacaan kon-sentrasi Ni sebesar 0,296 ppm akan memberikan hasil yang berbeda nyata. Penurunan pembacaan konsentrasi Ni pada larutan yang mengandung Fe dan Cr disebabkan oleh gangguan kimiawi. Larutan elektroplating seng mengandung Ni 0,251 ppm, Fe 39,370 ppm dan Cr 5.370 ppm. Larutan simulasi studi gangguan yang men-gandung Fe 50 ppm dan Cr 5.000 ppm dimana variasi konsentrasi tersebut mendekati konsentrasi Fe dan Cr di limbah menunjukkan penurunan pembacaan konsentrasi Ni sebesar 32,19 %.
Studi Interkalasi Lempung Bentonit Dengan Garam Amonium Kuaterner dan Pemanfaatannya Sebagai Pengikat Ion Pb2+ Widia Purwaningrum; I.A. Gede Widihati; Ni Wayan Sekarini
Jurnal Penelitian Sains Vol 10, No 3 (2007)
Publisher : Faculty of Mathtmatics and Natural Sciences

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (6425.229 KB) | DOI: 10.56064/jps.v10i3.460

Abstract

Lempung Na-bentonit diinterkalasi dengan garam amonium kuaterner N Cetyl, N,N,N Trimetil Amonium Bromida yang sebanding dengan kapasitas tukar kationnya dengan perbandingan garam amonium kuaterner dan Na-bentonit 2,9155 g : 10,0 g. Kemudian lempung yang telah terinterkalasi ditambah asam palmitat 2,0480 g. Pada penelitian ini dilakukan karakterisasi terhadap lempung Na-bentonit tanpa terinterkalasi (LTT) dan lempung Na-bentonit yang telah terinterkalasi garam amonium kuaterner dan asam palmitat (LT). Karakterisasi tersebut meliputi penentuan perubahan struktur menggunakan metode difraksi sinar-X (XRD) dan spektroskopi inframerah (FTIR), penentuan waktu setimbang adsorpsi terhadap ion Pb2+, penentuan isoterm adsorpsi terhadap ion Pb2+, dan penentuan kapasitas adsorpsi terhadap ion Pb2+ menggunakan spektrometer serapan atom (ASS). Hasil penelitian menunjukkan terjadi peningkatan jarak dasar (basal spacing) d001 sebesar 5,12981 A° pada lempung terinterkalasi garam amonium kuaterner dan asam palmitat (LT) dibandingkan lempung yang tidak terinterkalasi (LTT). Kapasitas adsorpsi lempung tanpa terinterkalasi (LTT) terhadap ion Pb2+ sebesar 1,9565 mg/g sedangkan kapasitas adsorpsi adsorsi lempung terinterkalasi (LT) terhadap ion Pb2+ sebesar 4,0263 mg/g.   
Fixed-Bed Column for the Removal of Cd(II) from Aqueous by Hydroxyapatite from Red Snapper (Lutjanus campechanus) Fish Bone Widia Purwaningrum; Fahma Riyanti; Muhammad Said; Poedji Loekitowati Hariani; Aria Septi Handayani
IJFAC (Indonesian Journal of Fundamental and Applied Chemistry) Vol 6, No 2 (2021): June 2021
Publisher : IJFAC (Indonesian Journal of Fundamental and Applied Chemistry)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24845/ijfac.v6.i2.46

Abstract

The Synthesis of hydroxyapatite from Red Snapper (Lutjanus campechanus) fish bone carried out. Hydroxyapatite is utilized for Cd(II) sorption from solution using a fixed-bed column. Hydroxyapatite was characterized using X-ray Diffraction, Fourier Transform Infra-Red, Scanning Electron Microscope-Electron Dispersive, and Thermogravimetric. In fixed-bed column, the influence of bed height (5, 10, 15 cm) and flow rate (6, 8 and 10 mL/min) were studied. The highest adsorption capacity is obtained at a bed height of 15 cm, and a flow rate of 6 mL/min with adsorption capacity is 47.027 mg/g. The predicted by Bed Depth Service Time (BDST) model obtained that value of R2 in the range 0.9964-0.9997. The adsorption capacity per unit volume ( is in the range 141.12-222.89 mg/L while  is in the range 0.0136-0.022 L/mg h. This indicates that BDST can be used to explain the performance of Cd(II) sorption onto hydroxyapatite by fix-bed column.
PENINGKATAN KESEHATAN MASYARAKAT MELALUI PENANAMAN TANAMAN BUAH SIRSAK SEBAGAI TANAMAN OBAT KELUARGA (TOGA) DAN PEMBUATAN RAMUAN OBAT DARI TANAMAN BUAH SIRSAK UNTUK MENGOBATI BERAGAM PENYAKIT Widia Purwaningrum
Jurnal Pengabdian Sriwijaya Vol 6, No 2 (2018)
Publisher : Lembaga Pengabdian pada Masyarakat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37061/jps.v6i2.6057

Abstract

Kegiatan pengabdian kepada masyarakat Dana DIPA UNSRI dengan model kegiatan pemberdayaan dan metode pembinaan sikap/kesadaran dengan judul ”PENINGKATAN KESEHATAN MASYARAKAT MELALUI PENANAMAN TANAMAN BUAH SIRSAK SEBAGAI TANAMAN OBAT KELUARGA (TOGA) DAN PEMBUATAN RAMUAN OBAT DARITANAMAN BUAH SIRSAK UNTUK MENGOBATI BERAGAM PENYAKIT” telah dilaksanakan. Tim pelaksana terdiri dari 2 orang dosen dan dibantu 2 orang mahasiswa dan 2 orang alumni sebagai pembantu pelaksana. Kegiatan ini diikuti oleh 20 orang ibu rumah tangga RT 10 Kelurahan Indralaya Mulya Ogan Ilir sebagai khalayak sasaran. Output Kegiatan ini adalah 20 pot tanaman obat keluarga (TOGA) di halaman rumah dan resep ramuan obat untuk penyakit kanker, asam urat, kolesterol, ambeien, infeksi kandung kemih, infeksi saluran kemih dan sakit pinggang.Di masa sekarang, kehidupan masyarakat semakin berat, semuanya dituntut serba cepat dan instan. Tuntutan hidup semakin tinggi, sedangkan penghasilan tak sesuai. Dengan pola hidup yang tidak sehat dan beban pikiran yang berat, akan memicu timbulnya berbagai macam penyakit. Dengan penghasilan yang pas-pasan, akan mempersulit masyarakat untuk leluasa berobat, dimana kita ketahui sekarang ini biaya pengobatan kesehatan tidaklah murah. Oleh karena itu, masyarakat perlu diberikan pengetahuan dan ketrampilan dalam pemanfaatan halaman rumah dengan penanaman tanaman obat keluarga (TOGA), dalam hal ini adalah tanaman buah Sirsak.Tanaman buah sirsak dapat tumbuh baik ditanam di tanah maupun di dalam pot besar, sehingga masyarakat yang tak memiliki pekaranganpun masih dapat menanam tanaman buah sirsak di halaman rumahnya. Tanaman buah sirsak (Annona muricata L.) merupakan tanaman yang selain buahnya yang dapat dimakan, telah diteliti orang bahwa setiap bagian tanaman buah sirsak (daun, kulit kayu, bunga dan biji) sangat berkhasiat untuk menyembuhkan berbagai macam penyakit. Berdasarkan riset terhadap kandungan fitokimia sirsak, tanaman ini mempunyai khasiat untuk pengobatan beragam penyakit. Hal ini dikarenakan tanaman sirsak bersifat sebagai antibakteri, antivirus, antikanker, antitumor, antiparasit, antimalaria, hipotensif (zat yang bersifat menurunkan tekanan darah), insektisida, vasodilator (zat yang bersifat melebarkan pembuluh darah), diuretik, pestisida dsb
The Synthesis of MnFe2O4-Activated Carbon Composite for Removal of Methyl Red From Aqueous Solution Fahma Riyanti; Poedji Loekitowati Hariani; Widia Purwaningrum; Elfita Elfita; Shella Santika Damarril; Iqlima Amelia
Molekul Vol 13, No 2 (2018)
Publisher : Universitas Jenderal Soedirman

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (459.07 KB) | DOI: 10.20884/1.jm.2018.13.2.435

Abstract

In this study, MnFe2O4-activated carbon composite was synthesized by co-precipitation method and applied to adsorb methyl red dye. MnFe2O4-activated carbon composite was made with the mass ratio of activated carbon and MnFe2O4 of 1:2. The composite characterization by using X-Ray Diffraction, Fourier Transform Infrared Spectroscopy, Scanning Electron Micrograph, and Energy-Dispersive X-Ray Spectroscopy, the surface area using the Brunauer, Emmett and Teller and magnetic properties by using Vibrating Sample Magnetometer. The adsorption parameters include contact time, and adsorbent weight. The spectra of FTIR MnFe2O4-activated carbon composite analysis show the presence of Fe-O and Mn-O which is not present in the spectra of activated carbon. SEM analysis shows that the composite has pores and MnFe2O4 oxides are spread on its surface. The composition of the composite consists of C, O, Fe, and Mn. The composite has a surface area of 143.992 smaller than that of the activated carbon of 217.697 m2/g. However, the composite has magnetic properties with the saturatization magnetization of 17.91 emu/g. The optimum condition of the composite for adsorption of methyl red was obtained at a weight of 0.15 g, and contact time of 100 minutes. The adsorption of the composite was in accordance by pseudo-second-order kinetic and Langmuir isotherms with adsorption capacity of 81.97 mg/g.
Secondary Metabolite from Endophytic Fungi Aspergillus Sp. The Leave Of Kunyit Putih (Curcuma zedoaria (Berg) Roscoe) Muharni Muharni; Fitrya Fitrya; Widia Purwaningrum; Ahmad Yogi Nugraha
Molekul Vol 11, No 1 (2016)
Publisher : Universitas Jenderal Soedirman

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (752.312 KB) | DOI: 10.20884/1.jm.2016.11.1.201

Abstract

The compound from endophytic fungi of Aspergillus sp. from leaves of kunyit putih (Curcuma zedoaria (Berg.) Roscoe) has been isolated. Isolation begins with cultivation ofAspergillus sp. in 18 L PDB’s media (Potato Dextrose Broth) for 28 days. The liquid cultivation medium was extracted by partitioning method using ethylacetate and then evaporated. The extract was separated and purified by chromatography techniques. Elucidation stucture of the isolated compound was analysis by spectroscopic method NMR 1D and 2D. Antibacterial activity of isolated compound was tested using the disc diffusion method at concentrations 2500, 1000, 500, and 125 ppm. The isolated compounds obtained in the form of a yellow oil (24.30 mg). The 13C NMR spectrum indicated 24 signals of carbon and base on analysis spectrum DEPT 135 showed 5 signal methynes carbon, 1 signals methylene, 9 signals of methyl and 9 signals quarternary carbon. These signals from 1H and 13C-NMR suggested that this compound contained aromatic group and four carbonyl. The isolated compound show antibacterial activity at concentration 2500 ppm which inhibition zone for E. coli, S. dysenteriae, S. aureus, B. subtilis were 10.3 ; 8.3; 8.4; and 7.8 mm, respectively. Based on the analysis result of NMR 1D and 2D, the compound was methyl 6-(5'-(2"-acetoxy-2”-methylpropanoyl)-3"- methyl-2'-(3"'-methylbutanoyl)phenyl)-3-methylbutanoate and has weak antibacterial activity.
Cr (III)-Doped Bentonite: Synthesis, Characterization and Application for Phenol Removal Purwaningrum, Widia; Vilantina, Vilantina; Rizki, Widya Twiny; Desnelli, Desnelli; Hariani, Poedji Loekitowati; Said, Muhammad
Makara Journal of Science Vol. 25, No. 2
Publisher : UI Scholars Hub

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Study of doping process of metal oxide Cr(III) onto bentonite for phenol removal has been done. The purpose of this study was to increase the capacity and effectiveness of bentonite adsorption.The doped bentonite was characterized using XRD, SEM-EDX and FT-IR spectrophotometer analysis. XRD characterization result showed an angle shift (2θ) characteristic at1.609°. The SEM-EDX characterization result showed that bentonite as control have a more gaps than Cr(III)-doped bentonite. Based on EDX result, the Al element decreased from 7.53% to 3.76%, Si from 19.84% to 10.23% and appeared Cr element 2.06%, The FT-IR characterization result showed no significant friction in the spectrum so it can be identified as physical adsorption. The adsorption of phenol was applied at pHpzc, which for bentonite as control was applied at pH 4 and Cr(III)- doped bentonite was applied at pH 8. The phenol adsorption rate fitted to pseudo-second-order and it was found that the equilibrium data was best followed by Freundlich isotherm model, the amount of adsorption rate constant (k) and adsorption capacity (Qe) was 0.0024 g.mg-1min-1 and 16.95 mg/g. The Enthalpy (ΔH) and entropy (ΔS) values decrease with increasing phenol concentration and the positive free energy value was indicated that the proccess was nonspontaneous because there has been an equilibrium state. Based on the adsorption result, it can be concluded that the doping method can produce better bentonite performance to adsorb phenol.
Effect of Al Concentration over ZnO-Al2O3 Physicochemical Characteristics and Removal of Remazol Red RB Widia Purwaningrum; Fingky Pristika Sari; Julinar Julinar; Adiq Ahmadi; Muhammad Said
ASEAN Journal of Chemical Engineering Vol 22, No 2 (2022)
Publisher : Department of Chemical Engineering, Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ajche.70084

Abstract

ZnO is one of the widely used semiconductors due to its high photocatalytic activity. The inactivity of ZnO in the visible range could be enhanced by combining the ZnO with Al. In this study, the photocatalytic activity of ZnO-Al2O3 on Remazol Red RB was investigated. The effect of the ratio mass of ZnO-Al2O3 (1:0.05, 1:0.07, and 1:0.10) was also evaluated. The photocatalyst would be characterized using XRD, SEM-EDX, and UV-Vis DRS. The characterization showed that photocatalysts were successfully synthesized. The XRD analysis showed that the optimum ratio mass of ZnO-Al2O3 was achieved by 1:0.05, with the smallest crystal size of 13.3 nm. The SEM analysis showed that the surface of ZnO-Al2O3 (1:0.05) was easily granulated with smaller particle sizes than ZnO, and the shape tends to clump with the composites. The EDX analysis of ZnO-Al2O3 confirmed the presence of Zn, O, and Al elements. The photodegradation study showed that the optimum conditions were obtained at a contact time of 180 minutes at pH 6 with 91.04% dye removal. In addition, the effect of the initial concentration of the dye was achieved at 50 ppm with a dye removal of 89.26%. The study showed that the ZnO-Al2O3 exhibited adequate removal of Remazol red RB.
Co-Authors Abd. Rasyid Syamsuri Adiq Ahmadi Ahmad Yogi Nugraha Aria Septi Handayani Desnelli Desnelli Elfita Elfita Fahma Riyanti Fingky Pristika Sari Fitrya Fitrya Frisca Yanti Sialagan I. A. Gede Widihati Iqlima Amelia Julinar Julinar Muhammad Said Muhammad Said MUHAMMAD SAID Ni Wayan Sekarini Nova Yuliasari Poedji Loekitowati Hariani Rizki, Widya Twiny Shella Santika Damarril Vilantina, Vilantina