Adsorpsi Selektif Kobalt Dari Slag Nikel Laterit Menjadi Nano Cobalt Liquid Berbasis Membran Nano Chitosan Oligosaccharide

Hartanto, Muhamad Rizki Tri (2025) Adsorpsi Selektif Kobalt Dari Slag Nikel Laterit Menjadi Nano Cobalt Liquid Berbasis Membran Nano Chitosan Oligosaccharide. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Slag nikel laterit ̶ limbah pengolahan bijih nikel ̶ berpotensi sebagai sumber alternatif kobalt (Co) yang ekonomis. Penelitian ini menggunakan electric arc furnace slag (EAFS) dan converter furnace slag (CFS) yang diproses menggunakan metode biosorpsi elektro-hidrometalurgi yang ramah lingkungan. Biosorpsi Co dilakukan dengan metode electrolysis-assisted adsorption menggunakan membran nano chitosan oligosaccharide (COS) sebagai adsorben. Penelitian ini bertujuan menganalisis pengaruh variasi voltase (0, 1, 3, dan 5 V) dan pH adsorbate (0,5 dan 4,5) terhadap efisiensi adsorpsi Co. Selain itu, penelitian juga dilakukan pada proses pendukung, seperti microwave-assisted roasting (daya radiasi 600, 800, dan 1000W) dan leaching (variasi konsentrasi H2SO4 dan solid-to-liquid ratio/S:L) juga diselidiki. Daya radiasi gelombang mikro berpengaruh signifikan terhadap komposisi Co yang melibatkan perubahan karakteristik bentuk senyawa. Daya radiasi gelombang mikro optimal ditemukan pada daya 600 W yang menghasilkan kadar Co tinggi secara ekonomis. Kombinasi antara konsentrasi H2SO4 sebesar 2,6 M dan rasio S:L sebesar 1:15 g/mL menghasilkan filtrat dengan konsentrasi Co tertinggi dengan kosentrasi Fe yang minim. Pada tahap biosorpsi, kapasitas adsorpsi (qe) tertinggi sebesar 1,724 mg/g ditemukan pada kondisi 1V dan pH 0,5. Sementara itu, efisiensi adsorpsi tertinggi, mencapai 35,11%, diperoleh pada 5V dan pH 4,5. Penelitian ini menemukan perbedaan proporsi pengaruh voltase dan pH terhadap efisiensi adsorpsi. Proses adsorpsi Co pada membran nano COS mengikuti model isoterm Freundlich yang menunjukkan adsorpsi multilayer pada permukaan heterogen juga menjadi temuan penelitian.
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Nickel laterite slag — a by-product of nickel ore processing — has promising potential as an economical alternative source of cobalt (Co). This study utilized electric arc furnace slag (EAFS) and converter furnace slag (CFS), which were processed through an environmentally friendly electro-hydrometallurgical biosorption method. The biosorption of Co was conducted via electrolysis-assisted adsorption using a nano chitosan oligosaccharide (COS) membrane as the adsorbent. The primary objective of this research was to evaluate the influence of voltage variations (0, 1, 3, and 5 V) and adsorbate pH (0,5 and 4.,) on Co adsorption efficiency. In addition, supporting processes such as microwave-assisted roasting (with microwave power of 600, 800, and 1000 W) and leaching (with varying H₂SO₄ concentrations and solid-to-liquid ratios, S:L) were also investigated. Microwave irradiation significantly affected the Co composition, inducing changes in compound morphology. The optimal microwave power was found to be 600 W, which resulted in higher Co content under cost-effective conditions. The optimal leaching condition was achieved with an H₂SO₄ concentration of 2,6 M and an S:L ratio of 1:15 g/mL, yielding a filtrate with the highest Co concentration and minimal Fe content. During the biosorption stage, the maximum adsorption capacity (qe) of 1,724 mg/g was obtained at 1 V and pH 0,5, while the highest adsorption efficiency (35,11%) was recorded at 5 V and pH 4,5. The study revealed differing contributions of voltage and pH to adsorption efficiency. Furthermore, the Co adsorption process on the nano COS membrane was found to follow the Freundlich isotherm model, indicating multilayer adsorption on a heterogeneous surface.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	Biosorpsi, Elektro-hidrometalurgi, Elektrolisis, Kobalt, Membran Nano COS, Biosorption, Electro-hydrometallurgy, Electrolysis, Cobalt, Nano COS Membrane.
Subjects:	Q Science > QD Chemistry > QD547 Flocculation, precipitation, adsorption, etc.
Divisions:	Faculty of Industrial Technology and Systems Engineering (INDSYS) > Material & Metallurgical Engineering > 28201-(S1) Undergraduate Thesis
Depositing User:	Muhamad Rizki Tri Hartanto
Date Deposited:	30 Jul 2025 07:40
Last Modified:	30 Jul 2025 07:40
URI:	http://repository.its.ac.id/id/eprint/123125

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