Arlantika, Dian (2019) Karakteristik Adsorpsi Eriochrome Black T (EBT) pada Zeolit Alam Terfosfatasi yang Diamobilisasi dalam Ca-Alginat. Sarjana thesis, Universitas Brawijaya.
Abstract
Penelitian tentang adsorpsi Eriochrome Black T (EBT) pada zeolit alam terfosfatasi yang diamobilisasi dalam Ca-alginat (Z/P-alginat) telah dilakukan. Tujuan penelitian ini adalah mengetahui pengaruh pH, waktu kontak, dan konsentrasi adsorbat terhadap adsorpsi EBT pada Z/P-alginat. Adsorben Z/P-alginat dibuat melalui tiga tahapan, yaitu aktivasi zeolit alam, fosfatasi zeolit aktif, dan amobilisasi zeolit terfosfatasi. Aktivasi zeolit alam dilakukan menggunakan larutan HCl 0,4 M. Fosfatasi zeolit aktif dilakukan dengan cara memanaskan campuran homogen zeolit aktif dan NH4H2PO4 dengan berbagai rasio Si/P dalam tanur pada suhu 235oC selama 5 jam. Adsorben zeolit terfosfatasi yang mempunyai daya adsorpsi tertinggi diamobilisasi dalam Ca-alginat untuk memperoleh Z/P-alginat. Keberhasilan fosfatasi zeolit aktif dievaluasi berdasarkan interpretasi spektra FTIR. Percobaan adsorpsi dengan metode batch dilakukan menggunakan 0,1 g adsorben Z/P-alginat dan 25 mL larutan EBT dengan variasi pH 1-8, waktu kontak 15-90 menit, dan konsentrasi adsorbat 50-300 mg/L. Jumlah EBT yang teradsorpsi diperoleh secara tidak langsung dengan menentukan konsentrasi adsorbat sisa secara spektrofotometri pada panjang gelombang 545 nm. Hasil interpretasi spektra FTIR menunjukkan adanya pita serapan baru vibrasi P-O (1137,92 cm-1, 960,48 cm-1, dan 653,82 cm-1) dan pergeseran bilangan gelombang vibrasi Si-O/Al-O dari 1222,79 cm-1 menjadi 1205,43 cm-1 dan dari 1047,27 cm-1 menjadi 1083,92 cm-1 yang menandakan terjadinya substitusi SiO4 atau AlO4- pada kerangka zeolit oleh PO4+. Adanya PO4+ dalam kerangka zeolit meningkatkan daya adsorpsi zeolit terfosfatasi terhadap EBT. Hasil penelitian menunjukkan bahwa pH, waktu kontak, dan konsentrasi adsorbat berpengaruh nyata terhadap adsorpsi EBT pada Z/P-alginat. Kondisi optimum adsorpsi tercapai pada pH 2 dan waktu kontak 60 menit. Kapasitas adsorpsi Z/P-alginat terhadap EBT pada kondisi optimum adsorpsi adalah sebesar 25,25 mg/g.
English Abstract
Research about Eriochrome Black T (EBT) adsorption on phosphated natural zeolite immobilized in Ca-alginate (Z/P-alginate) has been done. The purpose of this study were to determine the effect of pH, contact time, and concentration of adsorbate to EBT adsorption on Z/P-alginate. Z/P-alginate adsorbent was prepared through three stages, i.e. natural zeolite activation, active zeolite phosphatation, and phosphated zeolite immobilization. Natural zeolite was activated by using 0,4 M HCl solution. Active zeolite phosphatation was conducted by heating a homogeneous mixture of active zeolite and NH4H2PO4 with various Si/P ratios in the furnace at temperature 235oC for 5 hours. The phosphated zeolite adsorbent which had the highest adsorption power was immobilized in Ca-alginate to obtain Z/P-alginate. The success of active zeolite phosphatation was evaluated based on FTIR spectra interpretation. Batch adsorption experiments using 0.1 g of Z/P-alginate adsorbent and 25 mL of EBT solution were carried out with variations in pH 1-8, contact time of 15-90 minutes, and adsorbate concentration of 50-300 mg/L. The amount of adsorbed EBT was obtained indirectly by determining the residual adsorbate concentration spectrophotometrically at wavelength of 545 nm. The results of FTIR spectra interpretation showed the presence of new P-O absorption bands (1137.92 cm-1, 960.48 cm-1, and 653.82 cm-1) and shifts of Si-O/Al-O vibrational wave numbers of 1222.79 cm-1 to 1205.43 cm-1 and from 1047.27 cm-1 to 1083.92 cm-1 which indicated the substitution of SiO4 or AlO4- in the zeolite framework by PO4+. The presence of PO4+ in the zeolite framework increased the adsorption power of phosphate zeolite toward EBT. The results showed that pH, contact time, and adsorbate concentration significantly affected EBT adsorption on Z/P-alginate. The optimum condition of adsorption was reached at pH 2 and contact time of 60 minutes. The adsorption capacity of Z/P-alginate toward EBT at optimum adsorption conditions was 25.25 mg/g.
Other obstract
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| Item Type: | Thesis (Sarjana) |
|---|---|
| Identification Number: | SKR/MIPA/2019/317/051910988 |
| Uncontrolled Keywords: | EBT, zeolit alam, fosfatasi, amobilisasi, EBT, natural zeolite, phosphatation, immobilization |
| 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 08:11 |
| Last Modified: | 10 Aug 2020 08:11 |
| URI: | http://repository.ub.ac.id/id/eprint/179447 |
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