Nurlisa Hidayati
Department of Chemistry, Faculty of Mathematics and Natural Sciences, Sriwijaya University, Kampus UNSRI Indralaya, Jl. Palembang Prabumulih Km 32 Ogan Ilir 30662, South Sumatera

Published : 17 Documents
Articles

Found 17 Documents
Search

SINTESIS DAN KARAKTERISASI SENYAWA OKSOTRINUKLIR [Ru2Co(O)(OOCCH3)6(C5H5N)3](ClO4) Lesbani, Aldes; Mohadi, Risfidian; Hidayati, Nurlisa
Journal of Chemistry Vol. 6, No. 2 Juli 2012
Publisher : Journal of Chemistry

Show Abstract | Original Source | Check in Google Scholar

Abstract

The oxotrinuclear compound [Ru2Co(O)(OOCCH3)6(C5H5N)3](ClO4) has been synthesized using RuCl3?nH2O at room temperature under oxygen atmospheric condition. The oxotrinuclear complex was characterized by FT-IR spectrophotometer and mass spectrometer with cold spray ionization (CSI) method. The FT-IR spectra of the resulted oxotrinuclear compound show has specific vibration at 692 cm-1. This absorption is related to M3O vibration (M= metal). CSI-mass spectra of the oxotrinuclear compound show that pyridine as ligand was fragmented in oxotrinuclear compound.
KAJIAN INTERAKSI ION Co2+ DENGANSELULOSA DARI SERBUK GERGAJIKAYU Mohadi, Risfidian; Hidayati, Nurlisa; Saputra, Adi; Lesbani, Aldes
CAKRA KIMIA (Indonesian E-Journal of Applied Chemistry) Volume 1, No. 2, 2013
Publisher : CAKRA KIMIA (Indonesian E-Journal of Applied Chemistry)

Show Abstract | Original Source | Check in Google Scholar

Abstract

Telah dilakukan pemisahan selulosa dari serbuk gergaji kayu dengan menggunakan metanol dan HCldengan konsentrasi1%, 3%, 7%, dan 11%(v/v) dalam waktu 3 jam. Selulosa hasil pemisahan dikarakterisasi dengan spektroskopi FT-IR untuk selanjutnya digunakan sebagai adsorben ion logam Co2+ dalam medium air. Proses adsorpsi dipelajari melalui berbagai waktu interaksi, variasi konsentrasi, dan desorpsi terpisah. Spektrum infra merah menunjukan bahwa selulosa hasil pemisahan dari serbuk gergaji kayu dengan konsentrasi asam 5% memiliki kemiripan dengan spektrum inframerah selulosa standar. Konstanta laju adsorpsi ion logam Co2+ pada selulosa hasil pemisahan sebesar2.10-4 denganenergy adsorpsi sebesar 31,54 kJ/molserta pada serbuk gergaji kayu sebesar 4.10-4 dengan energy adsorpsi31,00kJ/mol. Kapasitas adsorpsi ion logam Co2+pada selulosa hasil pemisahan sebesar 0,55 x10-4 mol/g dan 0,09 x10-4mol/g untuk serbuk gergaji kayu. Desorpsi terpisah ion logam Co2+ menggunakan H2O, Na-EDTA, Amonium asetat, dan HCl menunjukan interaksi yang kuat ion logam Co2+ pada selulosa dan serbuk kayu. Separation of cellulosefrom wood sawdust using methanol and hydrocloric acid in acid concentrations of 1%, 3%, 7%, dan 11%(v/v) for 3 hours has been carried out. The cellulose was characterized using FT-IR spectroscopy and used as adsorbent for Co2+ metal ion in aqueous medium. Adsorption process was studied by varying the interaction time, concentration of solution, and desorption. The FT-IR spectrum of cellulose obtained from wood using 5% HCl has similarity withFT-IR spectrum of the standardcellulose. The adsorption rate constant and adsorption energy ofCo2+on cellulose obtained from wood sawdustare 2.10-4 and31,54 kJ/mol respectively,meanwhile those values are4.10-4  and 31.00 kJ/mol respectively on raw wood sawdust.The adsorption capacity  of cellulose andof wood sawdust are 0,55 x10-4 mol/g and 0,09 x10-4mol/g, respectively.The separated desorption of Co2+ metal ion using H2O, Na-EDTA, Amonium acetic, and HCl showedthat Co2+wasstrongly bound to cellulose and wood sawdust.
SINTESIS HIBRIDA ANORGANIK-ORGANIK V2O5-ASAM HUMAT DENGAN METODE SOL-GEL Mohadi, Risfidian; Hidayati, Nurlisa; Syari, Komala
Jurnal Sains dan Terapan Kimia Vol 7, No 2 (2013)
Publisher : Jurnal Sains dan Terapan Kimia

Show Abstract | Original Source | Check in Google Scholar

Abstract

Sintesis  senyawa  hibrida  anorganik-organik  V2O5-Asam  humat  menggunakan metode  sol-gel.  Perbandingan    bahan  yang  digunakan  adalah  V2O5:asam humat:FeCl3:air  (1:1:1:40:17)  dilarutkan  dan  didinginkan  sampai  suhu  30oC, disaring  dan  didapatkan  hibrida  senyawa  anorganik-organik  tersebut.  Senyawa  ini kemudian  dikarakterisasi  dengan  spektrofotometer  FT-IR  dan  XRD.  Hasil identifikasi dengan FT-IR diketahui bahwa gugus fungsi yang terdapat pada  asam humat  tidak  muncul  pada  spektra  hibrida  sol-gel  ini  seperti  C=C  aromatik,  C-H alifatik,  C-H  aromatik  ini  mengindikasikan bahwa  asam humat telah berada  dalam rongga V2O5. Hasil analisa dengan XRD, hibrida metode sol-gel ini memiliki indeks miller (111), (110), (100) dengan ukuran simetri (a) adalah 0,267nm.Kata kunci: sol-gel, microstructur, asam humat, V2O5,  hibrida
Adsorption Desorption of Chromium (III) Ion on Cellulose from Wood Powder Mohadi, Risfidian; Hidayati, Nurlisa; Lesbani, Aldes
International Journal of Science and Engineering Vol 7, No 1 (2014)
Publisher : Chemical Engineering Diponegoro University

Show Abstract | Original Source | Check in Google Scholar | Full PDF (500.853 KB)

Abstract

This study of adsorption desorption of chromium ion on cellulose from wood powder has been carried out systematically and also wood powder was used as adsorbent control in this research. Adsorption process was studied through investigation of adsorption time and variation of chromium ion in the adsorption. Desorption process was investigated using several desorption reagents such as hydrochloric acid, ammonium acetate, sodium EDTA, and water. Data of adsorption time of chromium ion on cellulose and wood powder was calculated to obtain adsorption rate constant of chromium ion. Then the data of variation concentration of chromium was formulated to obtain adsorption capacity of chromium ion on cellulose and wood powder. The results showed that adsorption rate constant of chromium on cellulose is 0.007 min-1 and 0.002 min-1 for wood powder. Adsorption capacity of chromium ion on cellulose is higher than on wood powder while 76.92 mol/g for cellulose and 55.56 mol/g for wood powder. The results of desorption using various desorption shows sodium EDTA is appropriate reagent for desorption of chromium ion on both cellulose and wood powder. Keywords - adsorption, cellulose, chromium, desorption.
STUDI INTERAKSI ION LOGAM Mn2+ DENGAN SELULOSA DARI SERBUK KAYU Mohadi, Risfidian; Saputra, Adi; Hidayati, Nurlisa; Lesbani, Aldes
Journal of Chemistry Vol. 8, No. 1 Januari 2014
Publisher : Journal of Chemistry

Show Abstract | Original Source | Check in Google Scholar

Abstract

Separation of cellulose from sawdust using methanol and hydrocloric acid in various acid concentrations has been carried out. Cellulose from sawdust was characterized using FT-IR Spectroscopy and XRD difractometer. The cellulose was used as adsorbent for Mn2+ and Co2+ metal ions in aqueous medium. Adsorptions process was studied through variation of time interaction, concentration and separation desorption. FT-IR Spectrum shows that cellulose with 5% acid concentration has similarity with FT-IR cellulose standard. The XRD difractometer pattern of cellulose shows that cellulose has amorf structure. The adsorption rate constant of Mn2+ on cellulose from sawdust shows adsorption rate constant in cellulose is higher than in sawdust. Adsorption energy of Mn2+ metal ion in cellulose from sawdust was about 26.21 kJ/mol. The adsorption capacity of Mn2+ in cellulose is higher than in sawdust. The desorption of Mn2+ metal ion using H2O, Na-EDTA, Amonium acetic, and HCl shows that the adsorption mechanism of Mn2+ on cellulose and sawdust is dominated by chemical interaction.
STUDY ADSORPTION DESORPTION OF MANGANESE(II) USING IMPREGNATED CHITIN-CELLULOSE AS ADSORBENT Lesbani, Aldes; Turnip, Ema Veronika; Mohadi, Risfidian; Hidayati, Nurlisa
International Journal of Science and Engineering Vol 8, No 2 (2015)
Publisher : Chemical Engineering Diponegoro University

Show Abstract | Original Source | Check in Google Scholar | Full PDF (435.802 KB)

Abstract

Abstract- Study adsorption desorption of manganese(II) using impregnated chitin-cellulose as adsorbent has been carried out. Chitin was extracted from snail shell and cellulose isolated from rice straw. Chitin and cellulose were impregnated using thiourea as impregnant agent. Characterization of chitin and cellulose was performed using FTIR spectroscopy, determination of water content, and ash content, while impregnated chitin-cellulose was characterized using FTIR spectrophotometer and X-Ray diffractometer. The adsorption of Mn(II) on impregnated chitin-cellulose was studied through determination of adsorption time and the influence of Mn(II) concentration, while desorption was carried out sequentially using various reagents. The results shown that chitin and cellulose from extraction processes are has similar FTIR spectrum compared to chitin and cellulose standard. The FTIR spectrum of impregnated chitin-cellulose shows both vibration of chitin and cellulose appeared and indicated successfully impregnate. These results were also equal to XRD pattern analysis. The water and ash contents of chitin are 0.038% and 0.043 while for cellulose are 0.184% and 0.165%, respectively. The adsorption of Mn(II) on chitin and cellulose are quite similar kinetically, while adsorption of Mn(II) on impregnated chitin-cellulose is higher at the same time with chitin and cellulose. In the low concentration of Mn(II), adsorption phenomena are similar on chitin, cellulose, and impregnated chitin-cellulose. Desorption process of Mn(II) on the adsorbents shows sodium etilenediamine tetra acetate able to desorp Mn(II) up to 68% higher than other reagents. Keywords: Manganese(II), Chitin, Cellulose, Impregnated Chitin-Cellulose
Karakterisasi Asam Humat dari Gambut Indralaya, Ogan Ilir Sumatera Selatan Mohadi, Risfidian; Hidayati, Nurlisa; Sri Juari Santosa, Sri Juari Santosa Sri Juari Santosa; Narsito, Narsito
Jurnal Penelitian Sains Vol 11, No 1 (2008)
Publisher : Faculty of Mathtmatics and Natural Sciences

Show Abstract | Original Source | Check in Google Scholar | Full PDF (7090.677 KB)

Abstract

Telah dilakukan isolasi asam humat dari tanah gambut berasal dari Indralaya Ogan Ilir, Sumatera Selatan dengan menggunakan ekstraksi alkali sesuai dengan yang direkomendasi oleh IHSS (International Human Acid Substance Society) dengan sedikit modifikasi, analisis asam humat hasil isolasi meliputi konfirmasi spektra FTIR dan penentuan kuantitatif gugus karboksilat dan –OH fenolat asam humat. Hasil penelitian menunjukkan bahwa senyawa humat hasil isolasi mempunyai kandungan gugus fungsional asam karboksilat, -OH fenolat dan keasaman total berturut-turut sebesar 353 cmol/kg, 367 cmol/kg dan 720 emol/kg serta kandungan N total sebesar 1,75% dan C/N organik sebesar 6,75.
Modification of Cellulose with 4.4 Diaminodiphenylether-O-Hydroxibenzaldehide as Adsorbent and Its Application for Adsorbing Metalic Ion of Cd2+ In Aqueous Solution HIdayati, Nurlisa; Mohadi, Risfidian; Marsitho, Euis; Fatoni, Ahmad
Indonesian Journal of Fundamental and Applied Chemistry Vol 1, No 2 (2016): June 2016
Publisher : Indonesian Journal of Fundamental and Applied Chemistry

Show Abstract | Original Source | Check in Google Scholar | Full PDF (324.749 KB)

Abstract

This research on the modification of cellulose using 4,4-diaminodiphenylether and o-hydroxybenzaldehyde and its application to adsorb Cd2+ in aqueous solution has been done. The adsorption studies of cellulose and modified cellulose were done by using batch technique. The cellulose and modified cellulose were characterized by FTIR. The FTIR spectra revealed characteristic bands of 1573 cm-1, 1280 cm-1, 3749 cm-1 and 1056 cm-1. It indicates function group of C=N, C=O, O-H and Si-OR bond, respectively. The FTIR spectra of cellulose and modified cellulose which interacted to Cd2+, it were indicated by the shift in wavenumber 3410 cm-1 to 3371 cm-1. This spectral shift indicating Cd2+ bound to OH-group. In this research, interaction between modified cellulose with Cd2+ confirmed by intensities spectral changes at 1620 cm-1. The adsorption capacity and energy from adsorption of Cd2+ ions toward cellulose were 71,43 mg/g and 4,142 kJ/mol, while toward modified cellulose were 55,56 mg/g and 0,13 kJ/mol, respectively. Keywords: cellulose, 4,4-diaminodiphenylether-o-hydroxybenzaldehyde, adsorption, Cd2+
Transesterification of Tropical Edible Oils to Biodiesel Using Catalyst From Scylla serrata Mohadi, Risfidian; A. Harahap, Hesti; Hidayati, Nurlisa; Lesbani, Aldes
Sriwijaya Journal of Environment Vol 1, No 2 (2016): Developing Without Destruction
Publisher : Program Pascasarjana Universitas Sriwijaya

Show Abstract | Original Source | Check in Google Scholar | Full PDF (342.181 KB)

Abstract

Abstract: Scylla serata shell was decomposed at various temperatures ranging from 700-1100 oC to obtain calcium oxide. Calcium oxide from decomposed Scylla serrata shell was characterized through X-Ray analysis, FTIR spectroscopy, and morphology analysis. Furthermore, decomposed Scylla serrata shell was used as catalyst for transesterification of tropical edible oils to form biodiesel. Biodiesel was characterized through density, viscosity, fatty acid value, and iodine number. The results showed that decomposed Scylla serrata shell at 900 oC could produce calcium oxide similar with standard, which was indicated from X-ray powder diffraction pattern of decomposed shell with JCPDS data. FTIR spectrum showed that main vibration of calcium oxide was observed at 393 cm-1. Morphology analysis using SEM indicated that uniform calcium oxide was obtained after decomposition. The use of decomposed shell as base catalyst for transesterification of tropical edible oils resulted biodiesel with density, viscosity, fatty acid value, and iodine number appropriated with SNI standard.Keywords: transesterification, edible oils, biodiesel, Scylla serrataAbstrak (Indonesian): Scyalla serrata telah didekomposisi pada berbagai suhu dari 700-1100 oC untuk diperoleh kalsium oksida. Kalsium oksida hasil dekomposisi dari cangkang Scylla serrata dikarakterisasi melalui pengukuran sinar X, analisis FTIR, dan analisis morfologi. Lebih lanjut, dekomposisi cangkang Scylla serrata digunakan sebagai katalis transesterifikasi minyak yang dimakan dari daerah tropis menjadi biodisel. Biodiesel dikarakterisasi melalui penentuan densitas, viskositas, nilai asam lemak, dan bilangan iod. Hasil penelitian menunjukkan bahwa dekomposisi cangkang Scylla serrata pada 900 oC dapat menghasilkan kalsium oksida mirip kalsium oksida standar yang diindikasikan dari pola difraksi XRD yang mirip data JCPDS. Spektrum FTIR menunjukkan vibrasi utama kalsium oksida teramati pada bilangan gelombang 393 cm-1. Analisis morfologi menggunakan SEM menunjukkan bahwa bentuk yang lebih seragam diperoleh setelah proses dekomposisi. Penggunaan cangkang hasil dekomposisi sebagai katalis basa untuk transesterifikasi minyak yang dimakan dari daerah tropis menghasilkan biodisel dengan densitas, viskositas, nilai asam lemak, dan bilangan iod yang sesuai dengan standar SNI.Kata kunci: transesterifikasi, minyak yang dimakan dari daerah tropis, biodiesel, Scylla serrata
STUDI KINETIKA DAN TERMODINAMIKA ADSORPSI TEMBAGA (II) MENGGUNAKAN ADSORBEN KITIN-SELULOSA HASIL IMPREGNASI Lesbani, Aldes; Agustina, Sherly; Hidayati, Nurlisa; Mohadi, Risfidian
Indonesian Journal of Chemical Science Vol 4 No 1 (2015)
Publisher : Indonesian Journal of Chemical Science

Show Abstract | Original Source | Check in Google Scholar

Abstract

Telah dilakukan proses impregnasi kitin dari cangkang bekicot dan selulosa dari jerami padi menggunakan tiourea sebagai impregnan. Hasil impregnasi dikarakterisasi menggunakan spektrofotometer FTIR yang dibandingkan dengan spektra FTIR kitin maupun selulosa sebelum impregnasi. Selanjutnya hasil impregnasi kitin-selulosa digunakan sebagai adsorben pada adsorpsi tembaga(II). Proses adsorpsi dipelajari melalui parameter kinetika dan termodinamika dan dibandingkan dengan kitin dan selulosa sebelum impregnasi. Hasil penelitian menunjukkan bahwa proses impregnasi berhasil dilakukan yang ditunjukkan adanya bilangan gelombang baik untuk kitin maupun selulosa pada spektra FTIR. Hasil penentuan parameter kinetika menunjukkan proses adsorpsi mengikuti order laju reaksi adsorben hasil impregnasi (0,006 menit-1)  > kitin (0,005 menit-1) > selulosa (0,004 menit-1). Penentuan parameter termodinamika yang diamati dari kapasitas adsorpsi menunjukkan order kapasitas adsorpsi pada adsorben hasil impregnasi (5x10-4 mol/g) > kitin (2,5x10-4 mol/g) > selulosa (0,63x10-4 mol/g).