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All Journal Jurnal Kimia Mulawarman Walisongo Journal of Chemistry
Qonita Awliya Hanif
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Chemistry

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Rice Husk Ash: A Promising Heavy Metal Adsorbent For Wastewater Treatment Kumalasari, Meiyanti Ratna; Beladona, Siti Unvaresi Misonia; Gracia, Amanda Natania; Sugiyani, Tina; Wulandari, Oktavia Rahmi; Imelya, Marsya; Syaima, Husna; Hanif, Qonita Awliya
Walisongo Journal of Chemistry Vol 7, No 1 (2024): Walisongo Journal of Chemistry
Publisher : Department of Chemistry Faculty of Science and Technology Walisongo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21580/wjc.v7i1.18852

Abstract

The primary polluter of the environment is liquid waste. Silica is one substance that can be utilized to minimize water pollution. Silica can be produced from agricultural biomass waste, such as rice husk ash. This study investigated the preparation of rice husk ash and the optimal synthesis method for producing bio-silica. A literature review of studies on rice husk ash, heavy metals, and adsorbents was conducted. The findings indicated that boiling rice husk at 800°C and washing with HCl produced high-purity silica. XRD (X-ray diffraction), FT-IR (Fourier transform infrared) spectrophotometers, and ED-XRF (Energy Dispersive X-ray fluorescence) were employed to characterize the rice husk ash. The precipitation, sol-gel, acidification, and hydrothermal methods were compared for bio-silica synthesis. The synthesized bio-silica can be used as a heavy metal absorbent for various metal ions, including Pb2+, Zn2+, Mn2+, Cu2+, As3+, As5+, and Cd2+.
Rice Husk Ash: A Promising Heavy Metal Adsorbent For Wastewater Treatment Kumalasari, Meiyanti Ratna; Beladona, Siti Unvaresi Misonia; Gracia, Amanda Natania; Sugiyani, Tina; Wulandari, Oktavia Rahmi; Imelya, Marsya; Syaima, Husna; Hanif, Qonita Awliya
Walisongo Journal of Chemistry Vol. 7 No. 1 (2024): Walisongo Journal of Chemistry
Publisher : Department of Chemistry Faculty of Science and Technology UIN Walisongo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21580/wjc.v7i1.18852

Abstract

The primary polluter of the environment is liquid waste. Silica is one substance that can be utilized to minimize water pollution. Silica can be produced from agricultural biomass waste, such as rice husk ash. This study investigated the preparation of rice husk ash and the optimal synthesis method for producing bio-silica. A literature review of studies on rice husk ash, heavy metals, and adsorbents was conducted. The findings indicated that boiling rice husk at 800°C and washing with HCl produced high-purity silica. XRD (X-ray diffraction), FT-IR (Fourier transform infrared) spectrophotometers, and ED-XRF (Energy Dispersive X-ray fluorescence) were employed to characterize the rice husk ash. The precipitation, sol-gel, acidification, and hydrothermal methods were compared for bio-silica synthesis. The synthesized bio-silica can be used as a heavy metal absorbent for various metal ions, including Pb2+, Zn2+, Mn2+, Cu2+, As3+, As5+, and Cd2+.
Produksi Biogas dari Limbah Peternakan Sapi dengan Konsorsium Mikroorganisme Lokal Hanif, Qonita Awliya; Tika, I Nyoman; Puspaningrat, Luh Putu Desy
JURNAL KIMIA MULAWARMAN Vol 23 No 1 (2025)
Publisher : Jurusan Kimia Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Mulawarman

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Abstract

Limbah peternakan sapi yang dikumpulkan dari peternak di sekitar Hutan Batukahu, Bali, Indonesia, telah diolah menjadi biogas. Kotoran sapi ini diproses menggunakan sistem digester anaerobik (AD) dengan konsorsium mikroorganisme isolat lokal untuk menghasilkan biogas. Konsorsium tersebut terdiri dari mikroorganisme pengurai limbah yang berasal dari kelompok ragi, metanogen, dan Bacillus. Rancangan penelitian menggunakan desain acak kelompok dengan dua faktor. Faktor pertama adalah konsentrasi konsorsium yang ditambahkan, yaitu 10%, 20%, dan 30%, sedangkan faktor kedua adalah perbandingan antara kotoran sapi dan air, yaitu 1:1 dan 1:2, dalam biodigester berkapasitas 250 liter. Variabel yang diamati mencakup volume biogas, pH, tekanan, dan aplikasi penggunaan biogas. Hasil penelitian selama 31 hari menunjukkan bahwa konsentrasi konsorsium tertinggi, yakni 20%, menghasilkan volume biogas sebesar 142.288,266 cm³, dengan suhu bioreaktor antara 30-32°C dan pH 7,1. Pengujian gas dilakukan dua kali, pertama pada hari ke-15 dan kedua pada hari ke-31. Waktu yang dibutuhkan untuk menggunakan biogas untuk memasak adalah 24 menit, dengan tingkat efektivitas sebesar 84,71% dibandingkan dengan LPG.
Co-Authors Ari Handono Ramelan Dr. I Nyoman Tika,M.Si . Gracia, Amanda Natania Husna Syaima Imelya, Marsya Lestari, Witri Wahyu Mochammad Fuad Puspaningrat, Luh Putu Desy Reva Edra Nugraha Sari, Meiyanti Ratna Kumala Sayekti Wahyuningsih Siti Unvaresi Misonia Beladona Sugiyani, Tina Wulandari, Oktavia Rahmi