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All Journal CHEMICA Jurnal Teknik Kimia Journal of Applied Materials and Technology JURNAL SIPISSANGNGI: Jurnal Pengabdian Kepada Masyarakat
Khairat, Khairat
Chemical Engineering Department, Universitas Riau, Indonesia
Agriculture, Biological Sciences & Forestry Humanities Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Energy Engineering Mechanical Engineering Public Health Other

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Mn/carbon sphere catalyst for heterogeneous activation of peroxymonosulfate for methylen blue removal Yusnimar Yusnimar; Khairat Khairat; Chairul Chairul; Silvia Reni Yenti; Wisrayetti Wisrayetti; Barata Aditya Prawiranegara; Heni Sugesti; Panca Setia Utama; Edy Saputra
CHEMICA: Jurnal Teknik Kimia Vol 8, No 2 (2021): December 2021
Publisher : Universitas Ahmad Dahlan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26555/chemica.v8i2.22063

Abstract

One of the latest innovations in textile waste treatment is advanced oxidation processes (AOPs) methods using an oxidizing agent capable of producing sulfate radicals (SO4•). This study aims to determine the activity of the Mn/Carbon sphere catalyst in the oxidation process, reduce the dye content by using a combination of peroxymonosulfate (PMS) and Mn/Carbon sphere catalyst as an oxidizing agent, and determine the optimum conditions in the process of reducing dye levels in the water. A hydrothermal process carried out the catalyst synthesis process to produce black carbon from D-glucose solution, then impregnated with variations of 3% and 5% of Mn metal. The degradation of methylene blue (artificial waste) of 25mg/L (1:10 dilution) was carried out for 120 minutes with variations in the catalyst mass of 0.001, 0.002, 0.003, and 0.004g and the mass of PMS 0.01, 0.02, 0.03, and 0, 04g in 100ml sample. Mn/Carbon sphere catalyst was able to activate PMS and was able to degrade methylene blue by 88.16%. The optimum condition for reducing the methylene blue levels in the water is at a concentration of 1g/L PMS and a Mn/Carbon sphere catalyst (5% Mn metal) 0.5g/L with an efficiency of 88.16%.
Synthesis and Characterization of Hydroxyapatite from Duck Eggshell by Wet Precipitation Process Yelmida Azis; Cory Dian Alfarisi; Komalasari Komalasari; Khairat Khairat; Yusnimar Sahan
Journal of Applied Materials and Technology Vol. 3 No. 1 (2021): September 2021
Publisher : AMTS and Faculty of Engineering - Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/Jamt.3.1.8-11

Abstract

Hydroxyapatite (HAp, Ca10(PO4)6(OH)2) is the most stable form of calcium phosphate and widely used in various medical applications, mainly in orthopedics and dentistry due to its close similarities with the inorganic mineral component of bone and teeth. This study aims to synthesize hydroxyapatite from duck eggshell using the precipitation method. The duck eggshell was calcined, hydrated (slaking) and underwent carbonation to form Precipitated Calcium Carbonate (PCC).  Afterwards, (NH4)2HPO4 was added to produce HAp by varying the molar ratio of Ca/P by 1.67, 1.77 and 1.87 and stirring speed by 200, 250, 300rpm under basic condition (pH 10 – 11). The best results were obtained at a molar ratio of 1.77 with 200rpm stirring speed. Furthermore, the X-ray Diffraction (XRD) analysis showed that its crystals were hexagonal with sizes of 23.062nm, in the absence of other crystalline phases. Therefore, the hydroxyapatite was obtained in the agglomerates form with a specific surface area of ??55.929m2/g.
PENINGKATAN KUALITAS PUPUK ORGANIK CAIR DENGAN PROSES FERMENTASI ANAEROBIK LIMBAH PETERNAKAN SAPI UNTUK PENINGKATAN INCOME MASYARAKAT DI DESA BATUBELAH KABUPATEN KAMPAR PROPINSI RIAU Adrianto Ahmad; Sri Rezeki Muria; Bahruddin Bahruddin; Lita Darmayanti; Khairat Khairat; Sri Helianty
JURNAL SIPISSANGNGI: Jurnal Pengabdian Kepada Masyarakat Vol 5, No 2 (2025): Sipissangngi Volume 5, Nomor 2, Juni 2025
Publisher : Lembaga Penelitan dan Pengabdian Masyarakat, Universitas Al Asyariah Mandar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35329/jp.v5i2.5921

Abstract

Pengabdian tahun 2024 ini merupakan kelanjutan dari pengabdian tahun 2022 dan 2023 dengan menggunakan Bioreaktor anaerobik yang telah dibangun sebanyak 5 unit di Desa Batubelah Kabupaten Kampar dengan kapasitas 1500 L yang dioperasikan secara kontiniu. Luaran kegiatan ini telah didapatkan Hak Paten Pembangkit Biogas dengan No. IDP000048383 dan Hak Cipta Buku Teknologi Tepat Guna No. C00201700259 dan telah berhasil membentuk kelompok peternak sapi di Desa Batubelah Kabupaten Kampar yang bertujuan untuk peningkatan pemanfaatan cairan keluaran dari Bioreaktor anaerobik sebagai pupuk organik cair. Hasil pengujian menjadi dasar pertimbangan untuk pengembangan pupuk organik cair pada pengabdian selanjutnya sebagai Program Peningkatan kualitas Pupuk organik Cair berasal dari Proses Fermentasi Anaerobik. Oleh karena itu, sangat penting dikembangkan pada desa-desa yang ada di Indonesia terutama pada Desa Batubelah Kabupaten Kampar Propinsi Riau berupa tindakan nyata dalam bentuk Kegiatan Pengabdian Fakultas Teknik Universitas Riau. Hasil pengabdian menunjukkan bahwa peningkatan kualitas pupuk organik cair dapat dilakukan dengan mengoptimalkan pengoperasian tangki bioreaktor anaerobik terutama pada laju alir umpan yang stabil setiap hari sebesar 10 % dari volume total bioreaktor anaerobik sehingga diperoleh jumlah produksi pupuk organik cair yang konstan setiap hari secara kontiniu sehingga komposisi Nitrogen, Fospor dan Kalium dalam pupuk organik cair yang diproduksi mempunyai kualitas yang stabil dan prima. Hasil pengujian menunjukkan bahwa kandungan Nitrogen sebesar 174,7 mg/L, Fospor sebesar 0,04 mg/L dan Kalium kecil dari 0,03 mg/L. Potensi pupuk organik cair yang berasal dari pemanfaatan limbah peternakan sapi yang diproses secara fermentasi anaerobik sangat menjanjikan untuk dikembangkan di pedesaan baik sebagai pupuk tanaman maupun pupuk di perkebunan. Cairan fermentasi anaerobik mengandung unsur karbon, nitrogen dan Fospor. Cairan fermentasi anaerobik tersebut dapat digunakan sebagai pengganti pupuk anorganik.
Co-Authors Adrianto Ahmad Alfarisi, Cory Dian Bahruddin Barata Aditya Prawiranegara Chairul, Chairul Heni Sugesti Komalasari Komalasari Lita Darmayanti Nurwijayanti Silvia Reni Yenti Sri Helianty Sri Rezeki Muria Utama, Panca Setia Wisrayetti Wisrayetti Yelmida Azis Yusnimar Sahan