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All Journal Jurnal Redoks Sainmatika: Jurnal Ilmiah Matematika dan Ilmu Pengetahuan Alam
Oktaviansyah, Ikbal
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Agriculture, Biological Sciences & Forestry Chemical Engineering, Chemistry & Bioengineering Chemistry Industrial & Manufacturing Engineering Mathematics Physics

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Citric Acid Treatment Untuk Rekondisi Dan Penggunaan Kembali Mikrofilter Pada Instalasi Pengolahan Air Bersih Oktaviansyah, Ikbal; Rully Masriatini
Jurnal Redoks Vol. 9 No. 1 (2024): REDOKS JANUARI - JUNI
Publisher : Universitass PGRI Palembang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31851/redoks.v9i1.13552

Abstract

Upaya untuk menggunakan kembali filter bekas terutama microfilter catridge dengan menggunakan chemical cleaning citric acid 2%. Tujuan dari penelitian ini untuk menganalisa kemampuan microfilter bekas sehingga dapat digunakan kembali untuk pengolahan air bersih. Variasi sampel yang digunakan adalah lama perendaman menggunakan citric acid selama 12 jam dan 24 jam. Selanjutnya 5 buah microfilter catridge dimasukkan kedalam microfilter package dan dilakukan analisa pada inlet dan outlet peralatan tersebut dengan parameter turbidity, Fe, dan Color. Untuk hasil terbaik terdapat pada nilai outlet untuk parameter turbidity dan color pada microfilter catridge baru dengan microfilter catridge bekas melalui perendaman 24 jam adalah sama sebesar 0.5 NTU dan  0 PtCo sedangkan untuk parameter Fe hampir mendekati sama yaitu outlet pada microfilter catridge baru sebesar 0,10 mg/l dan untuk microfilter catridge bekas dengan perendaman selama 24 jam sebesar 0.50 mg/l. Semakin lama perendaman chemical cleaning dengan citric acid pada microfilter catridge bekas maka semakin bagus kondisi atau performance filter tersebut serta dengan hasil penelitian ini maka industri terutama pada instalasi pengolahan air dapat menggunakan metode ini sebagai langkah penghematan dalam penggunaan microfilter catridge baru
Pengaruh Karbon Aktif Tempurung Kelapa dan Karbon Aktif Industrial Terhadap Parameter Ammonia Pada Danau Sipin Oktaviansyah, Ikbal; Antonius Yudhis Hindriarsana; Husnah; Agus Wahyudi
Jurnal Redoks Vol. 9 No. 2 (2024): REDOKS JULI - DESEMBER
Publisher : Universitass PGRI Palembang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31851/redoks.v9i2.14541

Abstract

Air danau merupakan potensi sumber bahan baku air bersih yang harus diolah terlebih dahulu, salah satunya adalah danau sipin. Tujuan penelitian ini adalah (1) untuk mengetahui karakteristik karbon aktif tempurung kelapa dan karbon aktif industrial, (2) untuk mengetahui pengaruh karbon aktif tempurung kelapa dan karbon aktif industrial terhadap parameter ammonia pada air danau sipin. Karbon aktif dari tempurung kelapa mendapatkan nilai terbaik pada hasil karakteristik kadar air 2,40% dibanding karbon aktif industrial 2,85%, sedangkan untuk karbon aktif industrial mendapatkan niai terbaik pada karakteristik kadar abu 3,90%, kadar karbon terikat 78,03%, kadar zat terbang 18,70%, daya serap terhadap iodium 800,10 mg/gr dibanding karbon aktif tempurung kelapa yaitu kadar abu 6,36%, kadar karbon terikat 65,70%, kadar zat terbang 20,21%, daya serap terhadap iodium 780,40%. Karbon aktif dari tempurung kelapa dan karbon aktif industrial telah memenuhi SNI-06-3730-1995 untuk karakteristik. Karbon aktif tempurung kelapa memiliki pengaruh penurunan parameter ammonia terhadap air danau sipin sebesar 0,444 mg/l menjadi 0,153 mg/l sedangkan karbon aktif industrial memiliki pengaruh penurunan parameter ammonia pada air danau sipin sebesar 0,444 mg/l menjadi 0,080 mg/l. karbon aktif industrial merupakan karbon aktif terbaik dalam menurunkan kadar ammonia dibandingkan dengan karbon aktif tempurung kelapa. Karbon aktif tempurung kelapa dan karbon aktif industrial berpengaruh terhadap penurunan kadar ammonia pada air danau sipin serta telah memenuhi baku mutu PP No.22 Tahun 2021 (LampiranVI) sebesar maksimal 0,20 mg/l.
Optimization of Domestic Wastewater Treatment Using a Mixture of Coconut Shell Activated Carbon Adsorbent and Fly Ash Oktaviansyah, Ikbal; Erna Yuliwati; Eko Ariyanto
Sainmatika: Jurnal Ilmiah Matematika dan Ilmu Pengetahuan Alam Vol. 21 No. 2 (2024): Sainmatika : Jurnal Ilmiah Matematika dan Ilmu Pengetahuan Alam
Publisher : Universitas PGRI Palembang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31851/sainmatika.v21i2.16246

Abstract

Utilization of solid waste raw materials in the form of coconut shells and fly ash as adsrobents for domestic wastewater treatment. This study aims to optimize the effect of coconut shell activated carbon and fly ash with variations in mass ration and stirring time on changes in pH, COD, BOD, ammonia, TSS, and total coliform by adsorption on domestic liquid waste to meet waste quality standards. The research method includes the preparation of activated carbon from coconut shell, SEM characterization and experiments of a mixture of coconut shell activated carbon mass and fly ash (5:10, 10:5, 5:15, 15:5 grams) with variations in stirring time (30 minutes, 60 minutes). The results of the study, the most optimal mixture for changes in pH, ammonia, TSS, COD, BOD, total coliform parameters in domestic wastewater was a mixture of coconut shell activated carbon adsorbent mass of 15 grams and fly ash of 5 grams with a stirring time of 60 minutes.
Analysis Corrosion Rate Carbon Steel by Mg Anode and Na2Cr2O7 in Musi River Water Media Komaini, M Ali; Ariyanto, Eko; Sri Yusmartini, Eka; Oktaviansyah, Ikbal
Sainmatika: Jurnal Ilmiah Matematika dan Ilmu Pengetahuan Alam Vol. 21 No. 2 (2024): Sainmatika : Jurnal Ilmiah Matematika dan Ilmu Pengetahuan Alam
Publisher : Universitas PGRI Palembang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31851/sainmatika.v21i2.16731

Abstract

This study aims to analyze and optimize the effect of Mg anode and sodium dichromate sacrificial protection on the corrosion rate of carbon steel in Musi River water media. The research involved carbon steel pipes (½ inch, 1 cm length) with an ID of 18.20 mm and OD of 18.80 mm. Four variables were tested: A (no corrosion prevention), B (Na2Cr2O7), C (Mg anode), and D (Na2Cr2O7 with Mg anode), each immersed in 150 ml of Musi River water for periods of 20, 30, 40, 50, and 60 days. Results showed the highest pH drop in variation A, where the initial pH of 6.87 decreased to 4.13 after 60 days. Variation A also showed the greatest increase in Fe concentration, rising from 1.47 mg/L to 4.89 mg/L, and turbidity from 80.8 NTU to 88.3 NTU after 60 days. Corrosion rate analysis indicated that carbon steel without corrosion prevention had the highest corrosion rate, reaching 0.0000025746 mpy after 60 days. In comparison, carbon steel with Na2Cr2O7 and Mg anode protection exhibited significantly lower corrosion rates. These findings highlight carbon steel pipes without corrosion protection experience higher degradation in Musi River water, while sodium dichromate and Mg anode treatments effectively reduce corrosion.
Optimizing Acid Mine Drainage Treatment Using Fly Ash and Bottom Ash Oktaviansyah, Ikbal; Piestie Hawa
Sainmatika: Jurnal Ilmiah Matematika dan Ilmu Pengetahuan Alam Vol. 22 No. 1 (2025): Sainmatika : Jurnal Ilmiah Matematika dan Ilmu Pengetahuan Alam
Publisher : Universitas PGRI Palembang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31851/sainmatika.v22i1.17384

Abstract

Acid mine drainage (AMD), characterized by high acidity and elevated concentrations of heavy metals, poses a significant threat to aquatic ecosystems. This study aims (1) to analyze and optimize the effects of fly ash (FA) and bottom ash (BA) on the reduction of pH, Fe, Mn, and total suspended solids (TSS) through adsorption processes, and (2) to evaluate the impact of varying adsorbent mass ratios in determining optimal treatment efficiency. Adsorption experiments were conducted using 10, 20, and 30 g of FA, BA, and their combinations, with surface morphology characterized via scanning electron microscopy (SEM). The results demonstrated that 30 g of BA achieved the highest removal efficiency, increasing pH from 2.8 to 7.5, reducing Fe from 12.2 mg/L to 1.6 mg/L, Mn from 7.9 mg/L to 0.9 mg/L, and TSS from 40 mg/L to 5 mg/L. SEM analysis revealed that BA possesses a higher pore density and carbon content than FA, offering a greater number of active sites for adsorption. The t-test indicated that the individual and combined effects of FA (X1), BA (X2), and their mixture (X3) significantly influenced treatment performance. An adjusted R² value of 83.9% confirmed a strong correlation between adsorbent variables and improvements in AMD quality.
Co-Authors Agus Wahyudi Antonius Yudhis Hindriarsana Eko Ariyanto Eko Ariyanto Erna Yuliwati Husnah Komaini, M Ali Piestie Hawa Rully Masriatini Sri Yusmartini, Eka