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All Journal Prosiding Seminar Nasional Sains Dan Teknologi Fakultas Teknik Jurnal Sains dan Teknologi
Anisya Lisdiana
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Aerospace Engineering Agriculture, Biological Sciences & Forestry Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Control & Systems Engineering Dentistry Electrical & Electronics Engineering Energy Engineering Health Professions Industrial & Manufacturing Engineering Mathematics Mechanical Engineering Medicine & Pharmacology Nursing Public Health Veterinary

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POTENSI PEMBENTUKAN ASAM NITRAT DARI PENANGKAPAN UDARA BEBAS MELALUI PLASMA DISCHARGE Adi Waskito; Herkuswyna Isnaniyah Wahab; Anisya Lisdiana; Monna Rozana
Prosiding Seminar Sains Nasional dan Teknologi Vol 12, No 1 (2022): VOL 12, NO 1 (2022): PROSIDING SEMINAR NASIONAL SAINS DAN TEKNOLOGI
Publisher : Fakultas Teknik Universitas Wahid Hasyim

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36499/psnst.v12i1.7231

Abstract

Asam nitrat atau HNO3 merupakan salah satu produk penting bagi pelaku industri, karena dapat digunakan untuk bahan baku proses pembuatan pupuk, industri tekstil, bahan peledak dan sebagai bahan pemurnian logam. Salah satu proses pembuatan asam nitrat yaitu dengan menggunakan proses ostwald, akan tetapi proses ini menghasilkan berbagai macam limbah yang merugikan untuk lingkungan. Pada percobaan ini, reaktor plasma discharge berbahan baku udara bebas diberikan variasi parameter yaitu jarak antar elektroda 0,5 cm dan 1 cm, tegangan 4,8 kV dan 6 kV, serta laju aliran udara 0,2 L/m, 0,4 L/m, dan 1 L/m.  Semakin besar jarak elektroda, tegangan, dan waktu akan menurunkan pH dan meningkatkan konsentrasi nitrat di air penampungan. Lain halnya dengan laju alir yang semakin besar akan memperoleh konsentrasi nitrat lebih sedikit. Nilai konsentrasi nitrat tertinggi sebesar 21,94 ppm (pH=2,9) diperoleh dengan perlakuan berupa jarak elektroda 1 cm,  laju aliran udara 0.2 L/m, tegangan 6kV dan waktu treatment selama 40 menit. Reaktor plasma dapat menghasilkan nitat cair yang asam sehingga berpotensi dalam pembentukan asam nitrat, namun perlu penelitian lebih lanjut. 
Pengaruh Variasi Konsentrasi Asam dan Variasi Pengendap pada Sintesis Besi Oksida dari Limbah Karat Besi Asiyah Nurrahmajanti; Anisya Lisdiana
INSOLOGI: Jurnal Sains dan Teknologi Vol. 4 No. 4 (2025): Agustus 2025
Publisher : Yayasan Literasi Sains Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55123/insologi.v4i4.6145

Abstract

Iron commodities are one of the very important commodities and are used in various sectors. The supply of iron and its derivatives has so far relied solely on mining results. However, the impact of mining results can be detrimental from geological, environmental, and health perspectives. One potential that is often overlooked is iron rust waste. The synthesis of iron oxide pigments from iron rust waste can be done using the precipitation method with variations of 1M and 4M HCl concentration and variations of the precipitant NH4OH 4M and NaOH 4M. The synthesized iron oxide shows red solids for the NaOH precipitant variation and blackish-red for the NH4OH precipitant. EDS results indicate that the NH4OH precipitant generates purer iron oxide pigments compared to NaOH. In the SEM testing, it was observed that iron oxide was successfully synthesized with a crystalline phase, namely the formation of rhombohedral crystals in the HEM2 and HEM4 variation, as evidenced by XRD testing showing 11 peaks at 2θ(º) 24.2; 33.3; 35.6; 41; 49.6; 54.2; 57.7; 62.5; 64.1; 69.7; and 72.1 compared to JCPDS 33-0664.
Co-Authors Adi Waskito Asiyah Nurrahmajanti Herkuswyna Isnaniyah Wahab Monna Rozana