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All Journal ALCHEMY Jurnal Penelitian Kimia
Eddy Heraldy
Program Studi Kimia, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Sebelas Maret, Jl. Ir. Sutami 36A Surakarta, 57126, Jawa Tengah, Indonesia
Chemical Engineering, Chemistry & Bioengineering Chemistry Energy Environmental Science Materials Science & Nanotechnology

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CALCINATION ON Ca-Mg-Al HYDROTALCITE FROM BRINE WATER AND ITS CHARACTERIZATION Eddy Heraldy; Khoirina Dwi Nugrahaningtyas; Heriyanto Heriyanto
ALCHEMY Jurnal Penelitian Kimia Vol 13, No 2 (2017): September
Publisher : UNIVERSITAS SEBELAS MARET (UNS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/alchemy.13.2.5606.205-216

Abstract

The study of calcination at 450 ºC on Ca-Mg-Al-hydrotalcite synthesized from brine water has been investigated. Characterization by XRD shows that Ca-Mg-Al hydrotalcite compound has found hydrotalcite phase and another phase such as Mg(OH)2, Al(OH)3 and CaCO3. These results are confirmed by the presence of hydroxyl groups (-O-H), M-O and M-OH groups (M is Mg, Ca and Al) at wavenumber region around     3463,34 cm-1; 447,50 cm-1; 536,62 cm-1and 786,99 cm-1. The calcination on Ca-Mg-Al hydrotalcite at 450 ºC affected change in the structure become a metal oxide such as MgO, CaO, Al2O3, MgAl2O4, and CaCO3. These results are confirmed from decreasing on the absorption peak of M-OH group at wavenumbers around 536,62 cm-1and 786,99 cm-1 and widening of the absorption region at 447,5 - 857,4 cm-1. Consequently, the calcination treatment successfully increased the surface area of Ca-Mg-Al hydrotalcite compounds from 97.4 m2/g to 156.826 m2/g. Morphology of Ca-Mg-Al hydrotalcite underwent changes the shape from a big to be a small form. Thermal analysis results showed changes in the structure of Ca-Mg-Al hydrotalcite into oxides begin at a temperature of 210 ºC and become oxide completely after the temperature reaches 420 ºC.
Pembuatan Ca-Mg-Al Hydrotalcite-like compound dari Brine Water untuk menjerap Cr(VI) Eddy Heraldy; Edi Pramono; Yohana Gita Aprilliaa
ALCHEMY Jurnal Penelitian Kimia Vol 15, No 1 (2019): Maret
Publisher : UNIVERSITAS SEBELAS MARET (UNS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (773.385 KB) | DOI: 10.20961/alchemy.15.1.27032.124-137

Abstract

Pembuatan Ca-Mg-Al hydrotalcite-like compound (HTlc) dengan metode kopresipitasi telah dilakukan. Hydrotalcite-like yang terbentuk dikarakterisasi dengan X-ray Diffraction (XRD), Fourier Transform Infra Red (FTIR), Surface Area Analyzer (SAA) dan digunakan sebagai adsorben Cr(VI). Hasil karakterisasi XRD menunjukkan adanya nilai d 7,54 Å pada sudut 2 theta 11,73º yang merupakan ciri hydrotalcite dengan interlayer karbonat. Hasil ini diperkuat dengan adanya gugus hidroksi pada daerah bilangan gelombang IR sekitar 3441 cm-1 serta gugus karbonat pada 1361 cm-1. Proses adsorpsi Cr(VI) dengan menggunakan Ca-Mg-Al hydrotalcite-like menunjukkan kondisi optimum pada pH 3 dan waktu kontak 20 menit. Kinetika adsoprsi Cr(VI) oleh Ca-Mg-Al hydrotalcite-like cenderung mengikuti persamaan kinetika pseudo second order dan isoterm adsorpsinya mengikuti model isoterm Langmuir. Kapasitas adsorpsi maksimum Cr(VI) menggunakan Ca-Mg-Al hydrotalcite-like lebih besar dibandingkan menggunakan hydrotalcite komersial. Pita spektra FTIR setelah adsorpsi Cr(VI) menunjukkan ion kromium terserap ke dalam Ca-Mg-Al hydrotalcite-like compound.Synthesis of Ca-Mg-Al Hydrotalcite-like compound from Brine Water for Cr(VI) removal. The synthesis of Ca-Mg-Al hydrotalcite-like compound (Htlc) with a coprecipitation method had been done. Hydrotalcite-like product was characterized by X-ray diffraction (XRD), Fourier transform infra red (FTIR), surface area analyzer (SAA) and was used as an adsorbent of Cr(VI). The XRD characterization result indicates a value of d 7.54 Å at 2 theta 11.73º, which is a characteristic of hydrotalcite with carbonate interlayer. These results are confirmed by the presence of a hydroxy group at wavenumber of IR around 3441 cm-1 and carbonate groups in the 1361 cm-1. The adsorption of Cr(VI) using the Ca-Mg-Al hydrotalcite-like showed the optimum conditions at pH 3 and 20 minutes contact time. The adsorption kinetic of Cr(VI) by Ca-Mg-Al hydrotalcite-like tends to follow the pseudo second order equation and the adsorption isotherm tends to follow the Langmuir model. The maximum adsorption capacity of Cr(VI) using the Ca-Mg-Al hydrotalcite-like is greater than that of using commercial hydrotalcite. Morever, the FTIR spectra analyzed after Cr(VI) adsorption indicates that chromium ion was adsorbed into of Ca-Mg-Al hydrotalcite-like compound.
Co-Authors Edi Pramono Heriyanto Heriyanto Khoirina Dwi Nugrahaningtyas Yohana Gita Aprilliaa