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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

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+.

Claisen Rearrangement Toward Cyclic Compound on Different Organic Synthesis Methods: Short Review Saputra, Rizki Rachmad; Rosalina, Reny; Pramudita, Dimas; Wulandari, Oktavia Rahmi; Yuneta, Yuneta; Gracia, Amanda Natania; Sugiyani, Tina; Imelya, Marsya
Chempublish Journal Vol. 7 No. 2 (2023): Chempublish Journal
Publisher : Department of Chemistry, Faculty of Science and Technology Universitas Jambi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22437/chp.v7i2.26053

The synthesis of functional and complex organic compounds is majorly performed by the Claisen rearrangement method. Claisen rearrangement is one of [3,3] sigmatropic rearrangements, a complex method in the synthesis of organic compounds, where it is mostly used to construct stereoselective compounds. It can be combined with other synthesis methods to synthesize organic compounds giving satisfactory results based on the method used, temperature, time, and yield produced. This review aimed to summarize several recent advances in synthesizing organic compounds through Claisen rearrangement reactions. An understanding of the mechanism and applications of this reaction might improve the ability to synthesize innovative and useful organic compounds in various fields of life sciences.

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

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+.

Kajian Etnobotani Tanaman Khas yang Dimanfaatkan oleh Masyarakat Kalimantan Kalalinggi, Septaria Yolan; Saputra, Rizki Rachmad; Wulandari, Oktavia Rahmi; Gracia, Amanda Natania; Imelya, Marsya
Bohr: Jurnal Cendekia Kimia Vol 2 No 02 (2024): Bohr: Jurnal Cendekia Kimia Vol 02 No 02
Publisher : Program Studi Kimia Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Palangka Raya

Show Abstract | Download Original | Original Source | Check in Google Scholar

Kalimantan merupakan salah satu wilayah di Indonesia yang mempunyai keanekaragaman tumbuhan sangat tinggi. Tumbuhan maupun tanaman khas yang berada di sekitar Kalimantan perlu dikaji agar mengetahui potensi dari tanaman khas berdasarkan dari bagian yang digunakan. Metode pengumpulan data berdasarkan studi pustaka. Terdapat 9 jenis tanaman yang dikaji berdasarkan penelusuran yang telah diperoleh berdasarkan informasi studi Pustaka, diantaranya tewu tadung (G. speciosum), sangkareho (Callicarpa longifolia), bajakah tampala (Spatholobus littoralis Hassk), bawang dayak (Eleutherine americana Merr), pulantan (Alstonia scholaris), ulap (Baccaurea motleyana Merr), laban (Vitex pubescens Vahl), rambusa (Passiflora foetida L), dan anggrek uwei menyame (Bromheadia finlaysoniana). Berdasarkan hasil yang diperoleh menunjukkan masyarakat Kalimantan menggunakan bagian tanaman seperti akar, daun, batang, biji, kulit buah, daging buah, siung bawang, getah, dan kulit kayu. Selain itu, pemanfaatan oleh masyarakat setempat banyak menjadikan tanaman khas sebagai obat, bahan pangan, dan tanaman hias.

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