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All Journal Wahana Didaktika PROSIDING SEMINAR NASIONAL PROGRAM PASCASARJANA Aptekmas : Jurnal Pengabdian Kepada Masyarakat Innovative: Journal Of Social Science Research JNPM (Jurnal Nasional Pendidikan Matematika) Journal Serambi Engineering (JSE)
Wasiran, Yulianto
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Journal : Serambi Engineering

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Pemanfaatan Abu Tongkol Jagung dan Abu Tempurung Kelapa dalam Pembuatan Pupuk Kalium Silika dengan Metode Sol-Gel Panggih Syambudi; Anerasari Meidinariasty; Yulianto Wasiran
Jurnal Serambi Engineering Vol. 9 No. 4 (2024): Oktober 2024
Publisher : Faculty of Engineering, Universitas Serambi Mekkah

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Abstract

South Sumatra is a province with high agricultural productivity. One of the largest agricultural products is corn and coconut, which is quoted from the website of the Lampung Province Food Security, Food Crops and Horticulture Office in 2021, which states that South Sumatra Province is one of the 10 largest corn producing provinces in Indonesia. With this in mind, the researcher conducted a study using the silica content of corn cobs and coconut husk waste as raw material for the production of potassium silica fertilizer using the sol-gel method. The potassium silicate fertiliser was produced by reacting KOH with corncob ash and coconut husk ash, which were varied. This is because the independent variables used are the concentration of KOH (4M, 6M) and the composition ratio of corn cob ash and coconut shell ash (10:40, 20:30, 25:25, 30:20, 40:10). The final result gave the best sample with more coconut shell ash composition than corn cob ash and higher KOH concentration. The sample formed 12.7 grams of final product with potassium content of 8821 mg/L and water content of less than 1%. As for the silica content in 4:1 coconut shell ash, there is approximately 73.2% silica.
Ekstraksi ZnO Limbah Baterai Zn-C sebagai Katalis ZnO-Zeolit untuk Degradasi Air Limbah Laundry Berdasarkan Massa dan Waktu Kontak Yuniar; Wasiran, Yulianto; Yuliandi, Rizki Brillian; Oktaviani, Erika Dwi; Safira, Asri; Novita, Sherly Fitria
Jurnal Serambi Engineering Vol. 11 No. 1 (2026): Januari 2026
Publisher : Faculty of Engineering, Universitas Serambi Mekkah

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Abstract

By utilizing waste from Zn-C batteries, it is possible to produce ZnO semiconductor compounds from waste water laundry, which fall under the category of photocatalysts that can decompose harmful organic and inorganic compounds from waste laundry. The research method employed is coprecipitation, which involves synthesizing ZnO through a solution precipitation process, followed by mixing it with zeolite and testing the photocatalyst's activity with varying contact times of 30, 60, 90, and 120 minutes, as well as different weights of ZnO-Zeolite photocatalysts at 0.5, 0.75, and 1 gram. The characterization results of ZnO-Zeolite indicated a crystal size of 23.94 nm and a band gap energy of 2.98 eV. To evaluate the effectiveness of the ZnO-Zeolite photocatalyst, parameters such as pH, Chemical Oxygen Demand (COD), and the degradation of surfactant compounds in laundry waste were analyzed using UV-Vis Spectrophotometry. The findings revealed a decrease in pH from level of 9.18 to 7.25, and a reduction in COD from 269 mg/L to 64 mg/L, representing a percentage decrease of 76.21%. Additionally, the degradation of surfactant levels dropped from 2.817 mg/L to 0.035 mg/L, achieving a degradation percentage of 98.76% with a catalyst mass of 0.75 g and a contact time of 90 minutes.
Co-Authors Andinasari Andinasari Andinasari Andinasari, Andinasari Anerasari Meidinariasty Farida Husien Husin, Farida Ibnu Maja Ibnu Maja Lindawati Lindawati Lindawati, Lindawati Maja, Ibnu Novita, Sherly Fitria Oktaviani, Erika Dwi Panggih Syambudi Safira, Asri Selastia Yuliati Wardhana, Galindra Pramudya Yuliandi, Rizki Brillian Yuniar