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All Journal Jurnal Media Infotama Syntax Literate: Jurnal Ilmiah Indonesia Pendas : Jurnah Ilmiah Pendidikan Dasar Unes Law Review Journal of Technopreneurship and Information System (JTIS) Law Development Journal JIFI (Jurnal Ilmiah Farmasi Imelda) Jurnal Multidisiplin Dehasen (MUDE) HUKMY : Jurnal Hukum JISPE Journal of Islamic Primary Education Kohesi: Jurnal Sains dan Teknologi Heca Journal of Applied Sciences Leuser Journal of Environmental Studies Journal of Educational Management and Learning Infolitika Journal of Data Science Grimsa Journal of Science Engineering and Technology Journal Of Law Sciences (Legisci) Journal of Society and Development Indonesian Cyber Law Review
Lala, Andi
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Journal : heca journal of applied sciences

 1 
Reduction of Microbial Content (Escherichia coli) in Well Water Using Various Processes: Microfiltration Membranes, Aeration and Bentonite Adsorption Lala, Andi; Marlina, Marlina; Yusuf, Muhammad; Rivansyah Suhendra; Maulydia, Nur Balqis; Muslem, Muslem
Heca Journal of Applied Sciences Vol. 1 No. 1 (2023): June 2023
Publisher : Heca Sentra Analitika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.60084/hjas.v1i1.17

Abstract

Water is a basic need for living things. This research aims to know the reduction of microbe content (Escherichia coli) in well water by using microfiltration membrane, adsorption using bentonite and aeration. The capability of those three methods in reducing E. coli was examined on the variety of time contact: 30, 60, 90, 120,180 and 300 minutes. The result of the research shows that using those methods has shown that the optimum percentage of E. coli reduction by using microfiltration membrane with 23 Most Probable Number (MPN)/100 mL of E. coli initial concentration in well water and became 0 MPN/100 mL by 100 % of E. coli reduction. Adsorption using bentonite resulted in a 78% reduction in E. coli and reduction by using aeration, the reduction of E. coli by 21%. This study shows that microfiltration has the best ability compared to other methods.
Evaluating Geothermal Power Plant Sites with Additive Ratio Assessment: Case Study of Mount Seulawah Agam, Indonesia Azhar, Fauzul; Misbullah, Alim; Lala, Andi; Idroes, Ghazi Mauer; Kusumo, Fitranto; Noviandy, Teuku Rizky; Irvanizam, Irvanizam; Idroes, Rinaldi
Heca Journal of Applied Sciences Vol. 2 No. 1 (2024): March 2024
Publisher : Heca Sentra Analitika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.60084/hjas.v2i1.158

Abstract

Indonesia, a country rich in geothermal resources, has yet to fully exploit its potential, particularly in volcanic regions like Mount Seulawah Agam. This study investigates the application of the Additive Ratio Assessment (ARAS) method for the site selection of Geothermal Power Plants (GPP) in Indonesia. The ARAS method provides a systematic approach to evaluating and prioritizing geothermal development sites by integrating multiple criteria, including geological, environmental, and socio-economic factors. The study collects data from various sources and weights criteria using the Ordinal Priority Approach (OPA), incorporating expert opinions. The findings demonstrate the effectiveness of the ARAS method in identifying optimal locations for GPP development, ensuring sustainability and feasibility. The study also tests the ARAS method in existing GPP locations in Jaboi, Sabang, Indonesia, to investigate alignment with the results and validate the approach. Furthermore, the study presents recommendations for GPP site selection. This research emphasizes the significance of multi-criteria decision-making techniques in facilitating renewable energy projects. It promotes a more systematic and informed approach to geothermal energy development in Indonesia and other geothermal-rich regions.
Enhancing TiO2 Photoelectrode Performance: The Role of La Doping Using the Sol-Gel Process Jannah, Mifthahul; Azmi, Nurul; Lala, Andi; Jalil, Zulkarnain; Mursal, Mursal
Heca Journal of Applied Sciences Vol. 3 No. 1 (2025): March 2025
Publisher : Heca Sentra Analitika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.60084/hjas.v3i1.266

Abstract

Due to growing interest in renewable energy technologies, dye-sensitized solar cells (DSSCs) have emerged as promising alternatives to conventional photovoltaics. This study explores the enhancement of titanium dioxide (TiO2) photoelectrodes through doping with lanthanum (La), a rare earth element known for its ability to modify semiconductors' structural and electronic properties. La-doped TiO2 was synthesized using the sol-gel method with La concentrations ranging from 0 to 4 mol%. The resulting films were deposited onto substrates and sintered at 600 °C for 1 hour. Characterization techniques included X-ray diffraction (XRD), scanning electron microscopy with energy-dispersive spectroscopy (SEM-EDS), UV-Vis spectrophotometry, and Fourier-transform infrared spectroscopy (FTIR). XRD confirmed the anatase phase of TiO2 and the appearance of La2O₃ phases with doping. The smallest crystallite size (8.20 nm) and lowest bandgap energy (3.31 eV) were achieved at 1 mol% La, compared to 3.52 eV for undoped TiO2. SEM-EDS indicated uniform La distribution, while FTIR revealed changes in surface chemistry. These results suggest that La doping, particularly at 1 mol%, can effectively enhance the optical and structural properties of TiO2, making it a promising candidate for improved DSSC performance.
Co-Authors Abas, Abdul Hawil Abdiansyah, Zeldi Abdul Fatakh Abdullah Abdullah Abdullah Abdullah Akbar, Zulhiddin Aprianto . Arrahman Arrahman Azhar, Fauzul Dharma, Dian Budi Diah, Muhammad Emran, Talha Bin Erkata Yandri Fajri.S, Muhammad Farida Nugrahani Fatimah, Cut Ghazi Mauer Idroes Gunawan Gunawan Hanan, Dafif Handayani, Sri Harianti, Evi Harsya, Rabith Madah Khulaili Hewindati, Yuni Tri Idroes, Ghalieb Mutig Idroes, Ghifari Maulana Irsan Hardi Irvanizam, Irvanizam Ismail Ismail Juansen, Monsya Julianda, Eka Junaedi Junaedi Junia, Wiyana Khairan Khairan Khairuddin - Khairullah, Khairullah Khalijah Awang Khudori, Abdullah Kosim Kosim Kusumo, Fitranto M. Yogi Riyantama Isjoni Manalu, Paris Marlina Marlina Marwan Marwan Maulana, Aga Maulydia, Nur Balqis Mayureza, Guntur Ma’ruf, Rahmat Arif Mifthahul Jannah Misbullah, Alim Mohamed Yusof, Nur Intan Saidaah Muhammad Gunawan Muhammad Yusuf Mursal Mursal Muslem Muslem, Muslem Musvira, Intan Nizamuddin Nizamuddin Nurul Azmi, Nurul Piski Razief Perucha Fauzie Afidh Rinaldi Idroes Rivansyah Suhendra Rohyana, Hadi Salsabila, Athaya Samud Samud, Samud Saputra, Tri Dian Sari, Menita Sefta Souvia Rahimah Sugianto Sugianto Suhendra , Rivansyah Suhendra, Rivansyah Surya Ade Saputera Taufiq Karma Teuku Rizky Noviandy TRINA EKAWATI TALLEI Ulhaq, Muhammad Zia Zahriah, Zahriah Zuchra Helwani, Zuchra Zulkarnain Jalil