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All Journal REACTOR : Journal of Research On Chemistry And Engineering Jurnal Teknologi Kimia Mineral
Syardah Ugra Al Adawiyah
Program Studi Teknik Kimia Mineral, Politeknik ATI Makassar
Agriculture, Biological Sciences & Forestry Chemical Engineering, Chemistry & Bioengineering Chemistry Energy Engineering Environmental Science Materials Science & Nanotechnology

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PEMANFAATAN LIMBAH KULIT SEMANGKA DAN RAMBUTAN SEBAGAI INHIBITOR KOROSI BAJA Syardah Ugra Al Adawiyah; Sariwahyuni Sariwahyuni; Idi Amin; Fitri Junianti; Ratnasari Ratnasari
JURNAL TEKNOLOGI KIMIA MINERAL Vol 4 No 2 (2025): JURNAL TEKNOLOGI KIMIA MINERAL
Publisher : Politeknik ATI Makassaar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61844/jtkm.v4i2.1223

Abstract

Korosi pada logam dapat menimbulkan kerusakan serius pada infrastruktur maupun mesin industri, sehingga berdampak pada kerugian ekonomi. Salah satu upaya yang banyak digunakan untuk menekan laju korosi adalah pemakaian inhibitor. Inhibitor anorganik memang efektif, namun berpotensi menimbulkan masalah lingkungan dan kesehatan. Oleh karena itu, diperlukan alternatif ramah lingkungan berupa inhibitor organik, misalnya yang berasal dari limbah kulit semangka dan kulit rambutan. Kedua bahan ini memiliki kandungan antioksidan yang mampu menghambat proses korosi sehingga berpotensi besar digunakan sebagai inhibitor alami. Penelitian ini bertujuan memanfaatkan limbah kulit semangka dan kulit rambutan sebagai inhibitor korosi serta menganalisis pengaruh variasi komposisi ekstraknya terhadap laju korosi baja. Variasi Komposisi yang digunakan adalah  (100% kulit semngka), (25%:75%), (50%:50%), (75%:25%), (100%: kulit rambutan). Metode gravimetri digunakan  untuk proses ekstraksi maupun pengukuran laju korosi.Hasil penelitian menunjukkan bahwa ekstrak kulit semangka dan kulit rambutan mampu menghambat korosi dengan baik. Komposisi 75% kulit rambutan dan 25% kulit semangka (sampel D) memberikan hasil paling optimal, dengan efisiensi inhibisi sebesar 81,84% dan laju korosi terendah sebesar 0,1595 mmpy.
Penggunaan Biji Pepaya Sebagai Koagulan Alami Dalam Pengolahan Air Limbah Domestik Syardah Ugra Al Adawiyah; Faryda Veronica Lamma Koly
REACTOR: Journal of Research on Chemistry and Engineering Vol. 5 No. 2 (2024)
Publisher : Politeknik ATI Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52759/reactor.v5i2.155

Abstract

One of the chemical contaminants in domestic wastewater is phosphate. High phosphate levels in water can cause algae bloom (eutrophication), which leads to a decrease in oxygen concentration in the water body and subsequently results in the death of aquatic organisms. Papaya seeds contain natural polymers in the form of proteins that act as natural polyelectrolytes, helping to reduce chemical contaminants in waste. This study aims to determine the most effective dose of papaya seed coagulant (Carica papaya L.) for lowering phosphate levels, turbidity and pH of domestic wastewater. An experimental method was used with varying sizes and doses of papaya seed coagulant: 70, 80 dan 90 mesh, and doses: 0.5 grams, 1 gram, 1.5 grams, and 2 grams, tested using a jar test. The reduction in phosphate levels in domestic wastewater was measured with a UV-Vis spectrophotometer. The results showed the treatment of domestic wastewater for reducing phosphate levels using papaya seed (Carica papaya L.) coagulant can be achieved by adding 2 grams of coagulant with a particle size of 90 mesh. Under these conditions, the phosphate levels decreased from 2.1529 mg L⁻¹ to 0,1907 mg L⁻¹, with an efficiency of 88.96%. According to the Domestic Wastewater Quality Standard No. 68 of 2016, the maximum allowable phosphate concentration is 0.2 mg L⁻¹, making the research results close to the established standard. Additionally, turbidity decreased from 86.55 NTU to 26.40 NTU, while the pH level increased from 6.5 to 6.9. This study suggests that papaya seeds could be a cost-effective, sustainable alternative for domestic wastewater treatment, especially in reducing phosphate contamination and helping maintain water quality
Co-Authors Faryda Veronica Lamma Koly Fitri Junianti Idi Amin Ratnasari Ratnasari Sariwahyuni