Adsorpsi Fosfat Menggunakan Residu Hasil Pirolisis Aspal Buton

Marcelina, Shinta Trixie (2025) Adsorpsi Fosfat Menggunakan Residu Hasil Pirolisis Aspal Buton. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Penggunaan fertiliser berbasis fosfat secara intensif di bidang pertanian dapat menyebabkan pencemaran lingkungan. Pencemaran fosfat menyebabkan pertumbuhan ekspansif gulma seperti enceng gondok dan tanaman liar di lingkungan aliran air seperti sungai atau danau. Pengurangan atau penghilangan kadar fosfat dalam air dapat dilakukan dengan proses adsorpsi. Karbon aktif dan mineral sudah banyak digunakan sebagai adsorben. Pada penelitian ini, residu hasil pirolisis aspal Buton diteliti untuk digunakan sebagai adsorben fosfat. Penelitian ini bertujuan untuk menganalisis kondisi optimum adsorpsi fosfat dengan adsorben hasil pirolisis residu aspal Buton. Residu aspal Buton dilakukan pirolisis pada suhu 600, 700, 800, 900°C yang akan digunakan sebagai adsorben. Karakterisasi hasil pirolisis residu aspal Buton dilakukan dengan XRD, FTIR, dan adsorpsi-desorpsi nitrogen. Hasil analisis XRD mengindikasikan residu sebagai portlandite ketika suhu pirolisis mencapai 700°C keatas. Hasil analisis FTIR pada puncak 3641 cm-1, yaitu Ca(OH)2 dari sinyal OH, diperoleh ketika suhu pirolisis residu aspal Buton diatas 700°C keatas. Berdasarkan adsorpsi-desorpsi nitrogen, pola isoterm termasuk tipe IV dan loop histerisis tipe H3 yang menunjukkan mesopori. Adsorpsi fosfat menggunakan residu hasil pirolisis aspal buton memberikan kurva kalibrasi dengan persamaan y = 0,0186x + 0,359 dengan R2 sebesar 0,995. Optimasi adsorpsi fosfat dilakukan dengan memvariasi suhu pirolisis, dosis adsorben, dan waktu kontak. Pengukuran fosfat dilakukan menggunakan spektrofotometri UV-Vis dengan molybdenum blue sebagai pengompleks fosfat. Adsorpsi optimum diperoleh dengan adsorben yang dipirolisis pada suhu 800oC, dosis adsorben sebanyak 3,5 mg, dan waktu kontak selama 30 menit. Adsorpsi ini lebih sesuai dengan model isoterm Freundlich dengan kinetika mengikuti persamaan pseudo-orde kedua.
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Extensive use of phosphate-based fertilizers in agriculture could cause environmental pollution. Phosphate pollution led to the expansive growth of weeds such as water hyacinths and wild plants in water flow environments such as rivers or lakes. The adsorption process could reduce or remove phosphate levels in water. Activated carbon and minerals have been widely used as adsorbents. In this study, the Buton asphalt pyrolysis residue was optimized to be applied as a phosphate adsorbent. Buton asphalt residue was pyrolyzed at 600, 700, 800, and 900°C to be used as an adsorbent. The residue was characterized using XRD, FTIR, and nitrogen adsorption-desorption. The XRD analysis results indicated the residue as portlandite when the pyrolysis temperature reached 700°C and above. The FTIR analysis resulted at 3641 cm-1 peak, Ca(OH)2 from OH signal, was obtained when the pyrolysis temperature of Buton asphalt residue was above 700°C and above. Based on nitrogen adsorption-desorption, the isotherm pattern belonged to type IV and the hysteresis loop is type H3, indicating mesopores. Phosphate adsorption used buton asphalt pyrolysis residue gave a calibration curve with the equation y = 0.0186x + 0.359 with R2 of 0.995. Phosphate adsorption optimization was carried out by varying the pyrolysis temperature, adsorbent dosage, and contact time. Phosphate measurement was performed using UV-Vis spectrophotometry with molybdenum blue as phosphate complexifier. Optimum adsorption was obtained with adsorbent pyrolyzed at 800°C, adsorbent dose of 3.5 mg, and contact time of 30 minutes. This adsorption was more in line with the Freundlich isotherm model with kinetics following the second pseudo-order equation.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	Adsorpsi, Fosfat, Pirolisis, Aspal Buton, CaCO3, Adsorption, Phosphate, Pyrolysis, Buton Asphalt, CaCO3
Subjects:	Q Science > QD Chemistry > QD547 Flocculation, precipitation, adsorption, etc.
Divisions:	Faculty of Science and Data Analytics (SCIENTICS) > Chemistry > 47201-(S1) Undergraduate Thesis
Depositing User:	Shinta Trixie Marcelina
Date Deposited:	28 Jan 2025 22:35
Last Modified:	28 Jan 2025 22:35
URI:	http://repository.its.ac.id/id/eprint/117056

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