Cahyo, Filipus Adimas Dwi (2019) Adsorpsi Congo red pada Granul Alumino Silico Phosphate (GASP): Kajian Waktu Kontak, pH, dan Konsentrasi Adsorbat. Sarjana thesis, Universitas Brawijaya.
Abstract
Penelitian tentang adsorpsi Congo red pada Granul Alumino Silico Phosphate (GASP) telah dilakukan. Tujuan penelitian ini adalah mengkaji pengaruh waktu kontak, pH, dan konsentrasi adsorbat terhadap adsorpsi Congo red pada GASP. Adsorben GASP dibuat melalui tiga tahapan, yaitu aktivasi zeolit, fosfatasi zeolit, dan granulasi zeolit terfosfatasi. Aktivasi zeolit alam dilakukan menggunakan larutan HCl 0,4 M. Fosfatasi zeolit dilakukan dengan cara memanaskan dalam tanur campuran homogen zeolit aktif dan NH4H2PO4 dengan berbagai rasio Si/P pada suhu 235 oC selama 5 jam. Adsorben zeolit terfosfatasi yang memiliki daya adsorpsi tertinggi diamobilisasi dalam gel kalsium alginat untuk memperoleh GASP. Keberhasilan fosfatasi zeolit alam dievaluasi berdasarkan spektra FTIR. Adsorpsi dengan metode batch menggunakan 0,1 g adsoben GASP dan 25 mL larutan Congo red dilakukan dengan variasi waktu kontak 15-120 menit, pH 3-9, dan konsentrasi adsorbat 10-60 mg/L. Jumlah Congo red yang teradsorpsi diperoleh secara tidak langsung dengan menentukan konsentrasi adsorbat sisa menggunakan spektrofotometer sinar tampak pada 498 nm. Hasil penelitian menunjukkan bahwa zeolit alam dapat terfosfatasi ditandai dengan munculnya bilangan gelombang baru pada spektra FTIR zeolit terfosfatasi yaitu 1137,92 cm-1, 960,48 cm-1, dan 576,68 cm-1, yang merupakan bilangan gelombang vibrasi ulur P-O, dan didukung oleh pergeseran bilangan gelombang vibrasi ulur Si-O atau Al-O dari 1222,79 cm-1 menjadi 1205,43 cm-1, dan dari 777,26 cm-1 menjadi 767,62 cm-1. Adanya PO4 + pada kerangka zeolit meningkatkan daya adsorpsinya terhadap Congo red. Waktu kontak, pH, dan konsentrasi adsorbat berpengaruh nyata terhadap adsorpsi Congo red pada GASP. Kondisi optimum adsorpsi tercapai pada waktu kontak 30 menit dan pH 5. Kapasitas adsorpsi GASP terhadap Congo red pada kondisi optimum adsorpsi tersebut diketahui sebesar 4,67 mg/g.
English Abstract
Research on Congo red adsorption on Alumino Silico Phosphate Granule (GASP) was carried out. The purpose of this study was to examine the effect of contact time, pH, and concentration of adsorbate on Congo red adsorption on GASP. GASP adsorbent was made through three stages, namely zeolite activation, zeolite phosphation, and granulation of phosphate zeolite. Natural zeolite was activated by using 0.4 M HCl solution. Zeolite phosphations were done by heating a homogeneous mixture of active zeolite and NH4H2PO4 with various Si/P ratios at 235 oC for 5 hours. The phosphated zeolite adsorbent which had the highest adsorption power was immobilized in calcium alginate gel to obtain GASP. The success of natural zeolite phosphatation was evaluated according to FTIR spectra. Batch adsorption experiments using 0,1 g of GASP adsorbent and 25 mL of Congo red solution were carried out with variations in contact time of 15-120 minutes, pH of 3-9, and adsorbate concentration of 10-60 mg/L. The amount of Congo red adsorbed was obtained indirectly by determining the residual adsorbate concentration using a visible spectrophotometer at 498 nm. The results showed that natural zeolite could be phosphated marked by the emergence of new wave numbers in the phosphated zeolite FTIR spectra, i.e. 1137.92 cm-1, 960.48 cm-1, and 576.68 cm-1, which were P-O stretching vibration, and supported by shifting stretching vibration of Si-O or Al-O from 1222.79 cm-1 to 1205.43 cm-1 and from 777.26 cm-1 to 767.62 cm-1. The existence of PO4 + on the zeolite framework increased its adsorption capability. Contact time, pH, and concentration of adsorbate significantly affected Congo red adsorption on GASP. The optimum condition of adsorption was reached at 30 minutes contact time and pH 5. The adsorption capacity of GASP toward Congo red at the optimum adsorption conditions was known to be 4.67 mg/
Other obstract
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| Item Type: | Thesis (Sarjana) |
|---|---|
| Identification Number: | SKR/MIPA/2019/211/051910935 |
| Uncontrolled Keywords: | Congo red, zeolit, fosfatasi, granul, batch. |
| Subjects: | 500 Natural sciences and mathematics > 541 Physical chemistry > 541.3 Miscellaneous topics in physical chemistry > 541.33 Surface chemistry > 541.335 Adsorption |
| Divisions: | Fakultas Matematika dan Ilmu Pengetahuan Alam > Kimia |
| Depositing User: | Budi Wahyono Wahyono |
| Date Deposited: | 10 Aug 2020 07:38 |
| Last Modified: | 10 Aug 2020 07:38 |
| URI: | http://repository.ub.ac.id/id/eprint/178860 |
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