Analisis Aktivator Asam Fosfat (H3PO4) Terhadap Karbon Aktif Berbasis Tempurung Kemiri Sebagai Elektroda Sistem Capacitive Deionization (CDI)

Nurazizah, Salma Riany (2025) Analisis Aktivator Asam Fosfat (H3PO4) Terhadap Karbon Aktif Berbasis Tempurung Kemiri Sebagai Elektroda Sistem Capacitive Deionization (CDI). Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Pendistribusian air di Indonesia belum cukup merata, terdapat daerah memiliki sumber air yang melimpah, sementara daerah lainnya mengalami kekurangan air. Dalam upaya meratakan distribusi air dapat dilakukan pengolahan air dengan proses desalinasi air garam dengan metode sistem Capacitive Deionization (CDI). Pada penelitian kali ini dibuat elektroda karbon modifikasi dengan H3PO4 dan yang tidak dimodifikasi untuk sistem CDI. Elektroda karbon dibuat menggunakan karbon aktif berbahan dasar karbon tempurung kemiri, Polyvinyl Alcohol (PVA), dan Asam Fosfat (H3PO4). Adapun variasi konsentrasi H3PO4 yaitu sebesar 0,1 M; 0,5M; 1M. Komposisi bahan yang digunakan dalam pembuatan karbon aktif modifikasi aktivator adalah 15 gram karbon aktif dan 150 ml H3PO4 dengan konsentrasi tiap variasinya. Sedangkan untuk komposisi pembuatan elektroda karbon adalah 10 ml aquades, 0,3 gram PVA, dan 5 gram karbon aktif. Pengujian elektroda karbon dilakukan dengan beberapa metode pengujian yaitu, CV, EIS, FTIR dan uji konduktivitas. Berdasarkan penelitian yang dilakukan adalah adanya pengaruh modifikasi aktivator dengan H3PO4 yaitu, kenaikan nilai kapasitansi dan difusi ionik, serta penurunan nilai konduktivitasnya. Nilai kapasitansi elektroda karbon melalui uji CV dan difusi ionik melalui uji EIS yaitu, pada modifikasi aktivator H3PO4 0,5M sebesar 17,2 F/g dan modifikasi H3PO4 1M sebesar 7,99 × 10-14 cm2 s-1. Pada uji konduktivitas didapatkan hasil tertinggi pada elektroda tanpa modifikasi yaitu, 359 μS/cm menunjukkan kemampuan menghantarkan listrik terbaik.
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Water distribution in Indonesia is not evenly distributed, there are areas with abundant water sources, while other areas experience water shortages. In an effort to equalize water distribution, water treatment can be carried out with a salt water desalination process using the Capacitive Deionization (CDI) system method. In this study, modified carbon electrodes with H3PO4 and unmodified ones were made for the CDI system. Carbon electrodes were made using activated carbon made from candlenut shell carbon, Polyvinyl Alcohol (PVA), and Phosphoric Acid (H3PO4). The variations in H3PO4 concentration were 0,1 M; 0.5M; 1M. The composition of the materials used in the manufacture of modified activated carbon activator is 15 grams of activated carbon and 150 ml of H3PO4 with concentrations of each variation. While the composition for making carbon electrodes is 10 ml of distilled water, 0,3 grams of PVA, and 5 grams of activated carbon. Carbon electrode testing is carried out using several testing methods, namely, CV, EIS, FTIR and conductivity tests. Based on the research conducted, there is an effect of modifying the activator with H3PO4, namely, an increase in the capacitance and ionic diffusion values, as well as a decrease in the conductivity value. The capacitance value of the activated carbon electrode through the CV test and ionic diffusion through the EIS test, namely, in the activator modification of H3PO4 0,5M of 17,2 F/g and the modification of H3PO4 1M of 7,99 × 10-14 cm2 s-1. In the conductivity test, the highest results were obtained on the electrode without modification, namely 359 μS/cm, indicating the best electrical conductivity.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	Capacitive Deionization, Elektroda, H3PO4, Karbon Aktif; Capacitive Deionization, Electrode, H3PO4, Activated Carbon.
Subjects:	Q Science > QC Physics > QC610.3 Electric conductivity Q Science > QD Chemistry > QD553 Electrochemistry. Electrolysis
Divisions:	Faculty of Science and Data Analytics (SCIENTICS) > Physics > 45201-(S1) Undergraduate Thesis
Depositing User:	Salma Riany Nurazizah
Date Deposited:	30 Jul 2025 00:58
Last Modified:	30 Jul 2025 00:58
URI:	http://repository.its.ac.id/id/eprint/121196

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