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All Journal Jurnal Penelitian Saintek Jurnal Elemen Kimia
Siti Sulastri
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Chemical Engineering, Chemistry & Bioengineering Chemistry Decision Sciences, Operations Research & Management

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EFFECT OF VARIOUS MEASURES ON POWER ADSORPTION ION KROMIUM (III) AND COLOMUM (VI) IN LAND DIATOMAE Susila Kristianingrum; Siti Sulastri
Jurnal Penelitian Saintek Vol 13, No 1: April 2008
Publisher : Institute of Research and Community Services, Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (98.233 KB) | DOI: 10.21831/jps.v13i1.184

Abstract

This research was done in Chemistry Laboratory FMIPA UNY. The aim of this research is to know the effect of diatomaeous earth soaking in a such acid on its adsorption power for heavy metal chromium(III) and chromium(VI) ions.The subject of this research is the diatomaeous earth from Sangiran Village, Sragen, Jawa Tengah. The object of this research is the diatomaeous earth properties soaking in such acid. Independent variables of this research are acid type, acid soaker concentration and the type of metal ion adsorbed. Dependent variable is its adsorption power for heavy metal chromium(III) and chromium(VI) ions. Experiment procedure consists of some steps: preparation, the diatomaeous earth treatment on chloride acid, nitric acid, and sulphuric acid, properties of the diatomaeous earth adsorbent for chromium(III) and chromium(VI) investigation. FTIR analyzing on original and treated diatomaeous earth and AAS analyzing to determine chromium(III) and chromium(VI) concentration before and after being diatomaeous earth soaker.The conclusion from this research was the diatomaeous earth soaking on such acids can caused adsorption power differences. Optimum adsorption power for chromium(III) occurred on a half concentrate chloride acid soaking (18.50%), concentrate nitric acid (65%), and concentrate sulphuric acid ((96%). Optimum adsorption power for chromium(VI) occurred on a half concentrate chloride acid soaking (18.50%), half concentrate nitric acid (32.50%), and an eight concentrate sulphuric acid (12%). Both original and treated diatomaeous earth has a similar FTIR spectrum pattern.
ISOTERM ADSORPSI KATION Mg(II) OLEH SILIKA GEL DARI BAGASSE TEBU Muthia Khadijah; Siti Sulastri
Jurnal Elemen Kimia Vol 6, No 3 (2017): Jurnal Kimia Dasar
Publisher : Universitas Negeri Yogyakarta

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Abstract

Penelitian ini bertujuan untuk menentukan karakter silika gel dari bagasse tebu,mengetahui pengaruh konsentrasi Mg2+ terhadap daya adsorpsi, serta mengetahui modelisoterm adsorpsi kation Mg2+ oleh silika gel. Silika gel dari bagasse tebu telah dibuatmelalui proses sol-gel dengan cara menambahkan HCl 1 M ke dalam larutan natriumsilikat hingga pH 7 dan terbentuk gel. Gel yang terbentuk dikeringkan menggunakan ovenpada suhu 80oC. Silika gel yang didapat dikarakterisasi secara XRD, FTIR, serta diujikemampuannya untuk adsorpsi kation Mg2+ pada berbagai konsentrasi. Hasil karakterisasisecara Difraksi Sinar-X menunjukkan bahwa silika gel berstruktur amorf, sedangkanuntuk karakterisasi FTIR menunjukkan bahwa silika gel telah berhasil disintesis ditandaidengan munculnya puncak serapan pada panjang gelombang 1097,43 yangmengindikasikan adanya gugus Si-O dan puncak serapan pada panjang gelombang3472,39 yang mengindikasikan adanya gugus –OH. Analisa AAS menunjukkan bahwapenambahan konsentrasi Mg2+ menyebabkan daya adsorpsi silika meningkat. Modelisoterm yang sesuai pada adsorpsi silika gel adalah isoterm Langmuir. Hal inidikarenakan harga R isoterm Langmuir lebih besar daripada harga R pada isothermFreundlich, yaitu sebesar 0.952.
Co-Authors Muthia Khadijah Susila Kristianingrum