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All Journal Bulletin of Electrical Engineering and Informatics Jurnal Dampak Jurnal Sains & Teknologi Lingkungan Journal of Environment and Sustainability Jurnal Purifikasi JATI EMAS (Jurnal Aplikasi Teknik dan Pengabdian Masyarakat) Jurnal Teknologi Lingkungan Lahan Basah Sewagati (Journal of Environmental Sustainability Management)
Ervin Nurhayati, Ervin
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Agriculture, Biological Sciences & Forestry Arts Humanities Chemical Engineering, Chemistry & Bioengineering Computer Science & IT Decision Sciences, Operations Research & Management Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Engineering Environmental Science Immunology & microbiology Languange, Linguistic, Communication & Media Public Health Social Sciences Other

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Journal : Jurnal Dampak

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Nano-MgO Synthesis and Characterization using MgCl2 via Precipitation Method Rizal, Moh Najib; Nurhayati, Ervin; Tangahu, Bieby Voijant; Bhakti, Lingga Manunggal
Dampak Vol. 22 No. 2 (2025)
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/dampak.22.2.31-41.2025

Abstract

This study examined the synthesis of nano-MgO via a precipitation method involving technical-grade magnesium chloride (MgCl2) as the starting material and ammonium hydroxide (NH4OH) as the precipitating agent. The objective of this study was to fine-tune the synthesis procedure by altering the concentration of NH4OH (0.5% and 1%) and to assess the properties of the resulting nanoparticles in terms of their suitability for applications. The properties of the synthesized nano-MgO were identified using X-ray fluorescence (XRF), X-ray diffraction (XRD), iodine number adsorption, and Brunauer-Emmett-Teller (BET) analysis to evaluate the oxides content, minerals formed and the crystallinity, adsorption capacity, surface area, and porosity. The findings show that, compared to 1%, a concentration of 0.5% NH4OH produced a superior MgO. A nano-MgO with 87.1% purities (of dominantly periclase phase), with an average crystallite grain size of 11.383 nm was formed. The iodine adsorption capacity of 243.01 mg/g, BET surface area of 43.4298 m2/g, and average pore diameter of 9.0002 nm were achieved, indicating formation of nanoporous structure, well-suited for a wide range of industrial use. Whereas when using 1% NH4OH, the purity only reached 83% (of the same dominant phase) with an average crystallite grain size of 11.691 nm, and iodine number of 197.98 mg/g. This research findings indicate that the precipitation method using 0.5% NH4OH is the effective method for producing high-quality nano-MgO from technical grade precursor with improved adsorption capabilities and suitability for large-scale fabrication. Keywords: Nano-MgO, Precipitation, Characterization
Adsorption of Low-Phosphate in Water Using Commercial Fe-based Adsorbents Faris, Salman; Nurhayati, Ervin
Dampak Vol. 22 No. 2 (2025)
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/dampak.22.2.113-122.2025

Abstract

Phosphate contamination in aquatic environments has become a serious issue due to its role in eutrophication, leading to excessive algal growth and degraded ecosystems. Anthropogenic activities such as agricultural runoff and wastewater discharge significantly increase phosphate concentrations. Among treatment technologies, adsorption using iron-based adsorbents has shown high efficiency, especially at low concentrations. However, performance is influenced by adsorbent type, particle size, and hydrodynamic conditions. This study evaluated the phosphate adsorption performance of Granular Ferric Hydroxide (GFH) and Bayoxide E33 with particle sizes of 74–149 µm, 37–74 µm, and <37 µm. Batch experiments were conducted with 0.3 mg P/L phosphate solution. The isotherm study was performed over 180 minutes, and the kinetics study extended to 240 minutes. Surface morphology was characterized by SEM, and specific surface area was analyzed using BET, which confirmed that smaller particles exhibited higher surface areas. Results showed that GFH <37 µm achieved the highest adsorption capacity of 7.5 mg/g, while Bayoxide <37 µm reached 6.18 mg/g. The Langmuir model best described the isotherm data, and the Pseudo Second-Order model indicated chemisorption as the dominant mechanism. These findings underscore the importance of optimizing particle size to enhance phosphate removal. Keyword: Adsorption, Bayoxide, GFH, Particle Size, Phosphate
Co-Authors Adhi Yuniarto Agus Slamet Alfan Purnomo Ali Masduqi Amalludin, Fahmi Ikhlasul Ariana Ariana Arliyani, Isni Arseto Yekti Bagastyo Aziz, S. Kamilia Bagastyo, Arseto Yekti Bhakti, Lingga Manunggal Bowo Djoko Marsono Cynthia Dyah Puspitasari Degani, Muhammad Dewi Puji Rahayu Eddy Setiadi Soedjono Eko Setiawan Endang Susilowati Fathyah, Fathyah Fauziah, Natasya Febriani Hartati, Putri Brikke Sukma Hastuti, Dian Suci Jingga, Azharine Purwa Joko Pramono Kalahari, Bintang Kartika Nuswantara Lahay, Aris Bastian Lin, Jr-Lin Mahendra, Bara Mahendra, Cok Agung Andra Marhendra, Bara Awanda Naura, Zahira Dinda Ni Wayan Suarmini, Ni Wayan Niken Prasetyawati, Niken Novianus R.P, Gabriel Pangestu, Aditya Kurnia Aji Pratama, Ekadhana Chana Pratama, I Putu Eka Widya Purwanita Setijanti Raditya, Murry Rahman, Dian Arif Rahmawati, Deti Rizal, Moh Najib SALMAN FARIS Saputro, Erwin Adi Septin Puji Astuti Sidik, Fahrudin Subechi, Dya Nur Mangzila Syaharani, Nadia Salwa Tangahu, Bieby Voijant Titah, Harmin Sulistiyaning Utami, Adinda Sih Pinasti Retno Wahyuni, Afrinda Dwi Warmadewanthi, I D A A Yulikasari, Andriyan Zafira, Athaya Dhiya