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All Journal Jurnal Ilmiah Berkala: Sains dan Terapan Kimia Unesa Journal of Chemistry
Amaria Amaria
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Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Energy Materials Science & Nanotechnology

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KAPASITAS DAN MEKANISME ADSORPSI Ni(II) OLEH KITOSAN SULFAT Sari Edi Cahyaningrum; Amaria Amaria
Jurnal Sains dan Terapan Kimia Vol 8, No 1 (2014)
Publisher : Program Studi Kimia, Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (288.332 KB) | DOI: 10.20527/jstk.v8i1.2129

Abstract

Tujuan penelitian ini adalah mempelajari kapasitas dan mekanisme proses adsorpsi Ni(II) pada kitosan sulfat. Variabel yang dipelajari adalah pengaruh konsentrasi ion logam Ni(II) terhadap kemampuan adsorpsi kitosan sulfat dan desorpsi fraksinasi sequensial terhadap Ni(II) yang sudah teradsopsi untuk mengetahui mekanisme adsorpsi. Hasil penelitian menunjukkan bahwa adsorpsi ion Ni(II) pada kitosan dan kitosan sulfat berlangsung secara kimia dengan energi adsorpsi sebesar 27,85- 34,48 kJ/mol. Kapasitas adsorption ion logam Ni(II) untuk kitosan dalam medium air dan ammonium sulfat 0,1 M adalah 10,72.10-5 mol/g dan 15,26.10-5 mol/g, sedangkan untuk adsorben kitosan-sulfat dalam medium amonium sufat 0,1M adalah 19,25.10-5 mol/g. Proses adsorpsi Ni(II) pada kitosan sulfat medium amonium sulfat mempunyai kapasitas adsorpsi yang paling besar dan interaksi didominasi oleh perbentukan kompleks. Kata kunci: kapasitas adsorpsi, mekanisme adsorpsi, Ni(II), kitosan 
Sintesis Nanopartikel Au-SiO2 Menggunakan Natrium Silikat dari Abu Ampas Tebu (AAT) Nur Aini; Amaria Amaria
Unesa Journal of Chemistry Vol 11 No 3 (2022)
Publisher : Department of Chemistry, Faculty of Mathematics and Natural Sciences, Surabaya State University, located at Jl Ketintang, Surabaya, East Java, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (731.966 KB) | DOI: 10.26740/ujc.v11n3.p143-152

Abstract

Synthesis of Au-SiO2 has been carried out using sodium silicate solution from bagasse ash (AAT) as the main source of silica. The purpose of this study was to determine the mole ratio of Au:Si in the relatively stable Au-SiO2 nanoparticles, which could be observed from the maximum wavelength and the determination of full width half maximum (FWHM). This type of research is experimental research. This research went through stages, namely synthesis of sodium silicate from bagasse ash, synthesis of Au-SiO2 and their characterization. The parameters studied were variations in the Au:Si mole ratio (1:19, 1:39 and 1:76), identifying the functional group Au-SiO2, determining the maximum wavelength and determining the stability of Au-SiO2. The identification of the Au-SiO2 was carried out using the FTIR instrument and the maximum wavelength was determined using a UV-VIS spectrophotometer. The results obtained are clear liquid Au-SiO2, dark red at a ratio of 1:19, pink at a ratio of 1:38 and 1:76. The results of identification with FTIR showed that the Au-SiO2 nanoparticles contained N-H and C-H groups at wave numbers 1566,77 cm-1 and 2923.02 cm-1, siloxane (Si-O-Si) and silanol (Si-OH) groups at wave numbers 1027.24 cm-1 and 902,12 cm-1. The results of measurements with a UV-VIS spectrophotometer show that Au-SiO2 nanoparticles are relatively stable at a ratio of 1:76 with a maximum absorption wavelength in the range of 523-523.5 nm, it can be said that silica was able to maintain the stability of Au nanoparticles in storage for 8 days. Key words: nanoparticle Au, silica, bagasse
Co-Authors Salsabila, Unik Hanifah Sari Edi Cahyaningrum