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All Journal Gunung Djati Conference Series Organisms: Journal of Biosciences
Adi Mulyana Supriatna
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Design of a Block-Shiped Photobioreactor Based on Microalgae Chlorella vulgaris for Capturing CO2 Emissions in Indoor Environments Adi Mulyana Supriatna; Dini Fujiyanti; Eko Prabowo Hadisantoso; Satiyarti, Rina Budi; Ashab Abdul Hakim
ORGANISMS: JOURNAL OF BIOSCIENCES Vol. 5 No. 2 (2025): Organisms: Journal of Biosciences
Publisher : Pusat HKI, Paten, dan Publikasi Ilmiah Universitas Islam Negeri Raden Intan Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24042/tc83v884

Abstract

Carbon dioxide (CO2) is one of the air polluting gases that can cause various health problems if accumulated indoors. Therefore, finding solutions to capture CO2 indoors is important. One of the efforts to reduce CO2 is by placing microalgae as CO2 capture agents in photobioreactors. This study aims to produce a photobioreactor based on microalgae Chlorella vulgaris, analyse cell density, and measure CO2 absorption by microalgae in the photobioreactor. In this study, cultivation was carried out with continuous lighting, microalgae cell density was calculated using a haemocytometer observed under a microscope, and determination of dissolved CO2 levels using the acid-base titration method in Walne medium. The results showed that a block-shaped photobioreactor with a size of 10×10×27.5 cm and a thickness of 2 mm can be a solution to capture indoor CO2 gas. The density of microalgae cells in the photobioreactor was the highest at 4.9 107 (cells/mL), indicating active photosynthesis. The results also show that the photobioreactor has the ability to capture CO2 gas in the room which is characterised by an increase in dissolved ΔCO2 levels reaching 139.39 mg/L.  
SINTESIS DAN KARAKTERISASI KARBON AKTIF DARI KULIT BUAH JERUK MANIS (Citrus sinensis (L.) Osbeck) TERMODIFIKASI MAGNETIT SEBAGAI ADSORBEN ION LOGAM TIMBAL(II) SALSABILA AS-SYIFA; RIZKA FITRIYANI S; ADI MULYANA SUPRIATNA
Gunung Djati Conference Series Vol. 58 (2025): Seminar Nasional Kimia Tahun 2025
Publisher : UIN Sunan Gunung Djati Bandung

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Abstract

Adsorpsi merupakan metode efektif dan ekonomis untuk mengatasi pencemaran logam berat, khususnya ion logam timbal(II) yang bersifat toksik. Penelitian ini bertujuan untuk mengevaluasi karbon aktif dari kulit jeruk manis (Citrus sinensis (L.) Osbeck) yang diaktivasi ZnCl₂ dan dimodifikasi magnetit (Fe₃O₄) sebagai adsorben ion Pb(II). Sintesis dilakukan melalui karbonisasi, aktivasi kimia, dan modifikasi kopresipitasi menggunakan FeCl₃.6H₂O dan FeSO₄.7H₂O. Karakterisasi FTIR mengidentifikasi gugus Fe–O pada 577,91 cm⁻¹, sedangkan SEM menunjukkan permukaan berpori dengan sebaran partikel magnetit dan aglomerasi partikel yang membentuk struktur tidak beraturan. Pengujian dilakukan dengan variasi massa adsorben (0,02–0,1 g), waktu kontak (30–150 menit), dan konsentrasi awal ion logam timbal(II) (50–250 mg/L), dianalisis menggunakan SSA. Kondisi optimum diperoleh pada konsentrasi awal 250 mg/L, massa adsorben 0,1 g, dan waktu kontak 150 menit, dengan kapasitas adsorpsi tertinggi sebesar 28,03 mg/g. Data mengikuti model isoterm Freundlich (Kf = 0,493 mg/g dan n = 0,99753), menunjukkan adsorpsi fisik pada permukaan heterogen. Hasil ini menunjukkan bahwa karbon aktif termodifikasi magnetit dari kulit jeruk manis efektif dan ramah lingkungan sebagai adsorben logam berat.
Co-Authors Ashab Abdul Hakim Dini Fujiyanti Eko Prabowo Hadisantoso Rina Budi Satiyarti, Rina Budi RIZKA FITRIYANI S SALSABILA AS-SYIFA