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All Journal MEDIA KOMUNIKASI TEKNIK SIPIL SAINS DAN MATEMATIKA JURNAL KIMIA SAINS DAN APLIKASI Jurnal Ilmu Lingkungan Elkawnie Jurnal Noken: Ilmu-Ilmu Sosial Indonesian Journal of Chemistry Pendas : Jurnah Ilmiah Pendidikan Dasar Molekul: Jurnal Ilmiah Kimia Journal of Local Government Issues International Journal of Sustainable Transportation Technology Jurnal Sains dan Edukasi Sains Journal of Science and Science Education Humanism : Jurnal Pengabdian Masyarakat JSIP: Jurnal Studi Ilmu Pemerintahan Greensphere: Journal of Environmental Chemistry Jurnal Edukasi dan Pengabdian kepada Masyarakat (JEPKM) Molekul: Jurnal Ilmiah Kimia Bulletin of Chemical Reaction Engineering & Catalysis JURNAL REKAYASA KIMIA & LINGKUNGAN
Yayuk Astuti
Chemistry Department, Faculty Of Science And Mathematics, Universitas Diponegoro, Jl. Prof. Jacob Rais, Tembalang, Semarang 50275
Religion Arts Humanities Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Education Energy Engineering Environmental Science Industrial & Manufacturing Engineering Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mathematics Physics Public Health Social Sciences Transportation Other

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Digitalization of Police Services as Public Service Innovation: A Case Study of the Parepare Police Ahmad, Jamaluddin; Nurjannah Nonci; Zainuddin, Abdul Majid; Astuti, Yayuk; Gafur, Abdul
Journal of Local Government Issues Vol. 9 No. 1 (2026): March
Publisher : Universitas Muhammadiyah Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22219/logos.v9i1.43348

Abstract

This study investigates the digitalization of police services through the Polri Super App at the Parepare Police Department, focusing on efficiency, accessibility barriers, accountability and transparency, and institutional challenges. The research aims to analyze how digital policing contributes to more efficient and accountable service delivery while also identifying the limitations constraining its implementation. Using a qualitative case study approach, data were collected through in-depth interviews, observations, and document analysis. They were processed using NVivo software to generate thematic coding, word frequency visualization, and a matrix coding query. The findings reveal that the application significantly improved efficiency by reducing waiting times and streamlining administrative processes. It also enhanced accountability through digital trails that minimized manipulation and unofficial payments. However, the study highlights persistent barriers, particularly for older citizens with limited digital literacy, as well as institutional challenges such as inadequate staff training and frequent system downtime. From a theoretical standpoint, the results confirm the relevance of the Technology Acceptance Model (TAM) and the Unified Theory of Acceptance and Use of Technology (UTAUT). At the same time, the New Public Service (NPS) framework emphasizes the importance of accountability and inclusivity in digital reforms.
The Characterization of Oyster Shell (Crassostrea gigas) as Adsorbent in The Removal of Cr(VI) Ions. A Study of NaOH and H2SO4 Activation Effect Lia Handayani; Cut Rahmawati; Nurhayati Nurhayati; Yayuk Astuti; Adi Darmawan
Elkawnie Vol. 6 No. 1 (2020)
Publisher : Faculty of Science and Technology Universitas Islam Negeri Ar-Raniry

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22373/ekw.v6i1.5543

Abstract

Abstract : Oyster shell as one of the highest bio-waste in Alue Naga Aceh Besar District, Indonesia, was used as an adsorbent to remove a heavy metal Cr (VI) ion. The study was started by calcinating oyster shells at a high temperature of 800 ºC for 3 hours. The effect of various acid (H2SO4) and base (NaOH) activator was studied using characterization and adsorption experiments. The characterization obtained the sample activated by 10% NaOH (Na10-ACT) and 10% H2SO4 (H10-ACT) had the highest surface area which had 14.23 m2/g, 10.77 m2/g, respectively. Furthermore, the adsorption experiments confirmed the highest surface area by showing the highest Cr (IV) ion removal of 57.66%, 70.7%, respectively. The further investigation using X-ray fluorescence (XRF) determined that the Na10-ACT adsorbent has a better composition compared to the H10-ACT due to its high purities.Abstrak : Cangkang tiram sebagai salah satu bio-limbah padat di Desa Alue Naga Kabupaten Aceh Besar, digunakan sebagai adsorben untuk menghilangkan ion logam berat Cr (IV). Penelitian ini diawali dengan mengkalsinasi cangkang tiram pada temperatur tinggi 800ºC selama tiga jam. Pengaruh penambahan aktivator asam (H2SO4) dan basa (NaOH) juga dipelajari melalui karakterisasi dan pengujian adsorpsi. Hasil karakterisasi menunjukkan sampel yang diaktivasi dengan 10% NaOH (Na10-ACT) dan 10% H2SO4 (H10-ACT) memiliki luas permukaan tertinggi yaitu 14,23 m2/g, 10,77 m2/g, masing-masing. Lebih lanjut, pengujian adsorpsi juga mendukung luas permukaan yang tinggi dengan menghilangkan ion Cr (IV) sebesar 57,66%, 70,7%, masing-masing. Investigasi melalui analisa XRF menyimpulkan bahwa Na10-ACT memiliki komposisi yang lebih baik dibanding H10-ACT karena memiliki kemurnian yang tinggi.
Production and Characterization of Adsorbent from Oyster Shell (Crassostrea gigas) Using Physics and Chemical Activation with ZnCl2 and Its Application for Removal of Hexavalent Chromium Lia Handayani; Azwar Thaib; Nurhayati Nurhayati; Yayuk Astuti; Adi Darmawan
Elkawnie Vol. 6 No. 2 (2020)
Publisher : Faculty of Science and Technology Universitas Islam Negeri Ar-Raniry

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22373/ekw.v6i2.7333

Abstract

Abstract: Oyster shell waste has been investigated as a raw material for making adsorbents that will be activated. Physical activation uses temperatures of 500 ºC, 600 ºC, 700 ºC, 800 ºC, 900 ºC and chemical activation uses ZnCl2 with a concentration of 1 %, 5 %, 10 % and 15 %. Based on the analysis of the characteristics that have been carried out for physically activated adsorbents, the oyster shell calcined at 800 ºC produces the best characteristics, it is a radius of 35.11 Å with a percentage of removal of 38.04 %, as well as the results of the FTIR, XRF and SEM analysis gives the best results among others. Whereas for chemically activated adsorbents, the use of activator ZnCl2 10% produces adsorbents with the best characteristics among others with a radius of 84.14 Å and removal percentage of 65.68 %, the best results for adsorbents activated using 10% ZnCl2 are also supported by analysis results given by FTIR, XRF, and SEM.Keywords: Adsorbent; BET; Cr6+; Oyster Shell Waste; XRF Abstrak: Cangkang tiram (Crassostrea gigas) telah diteliti sebagai bahan baku pembuatan adsorben yang akan diaktivasi secara fisika dan kimia. Pembuatan adsorben dengan aktivasi secara fisika menggunakan variasi suhu 500 ºC, 600 ºC, 700 ºC, 800 ºC dan 900 ºC. sedangkan aktivasi kimia yaitu menggunakan aktivator ZnCl2 menggunakan variasi konsentrasi 1 %, 5 %, 10% dan 15 %. Berdasarkan analisa karakteristik yang telah dilakukan untuk adsorben-adsorben yang telah diaktivasi secara fisika, cangkang tiram yang di kalsinasi pada suhu 800ºC menghasilkan karakteristik yang paling baik, yaitu radius pori-pori 35,11 Å dengan persentase penyisihan sebesar 38,04 %, begitu pula dengan hasil analisa FTIR, XRF dan SEM memberikan hasil terbaik diantara yang lain. sedangkan untuk adsorben-adsorben yang diaktivasi secara kimia, penggunaan aktivator ZnCl2 10% menghasilkan adsorben dengan karakteristik yang paling baik diantara lainnya dengan radius pori-pori 84,14 Å dan persentase penyisihan sebesar 65,68%, hasil terbaik untuk adsorben yang diaktivasi menggunakan ZnCl2 10 % juga didukung oleh hasil analisa dari FTIR, XRF dan SEM.
Co-Authors Abdul Jabbar Adi Darmawan ADI SANTOSO Agriccia Pangestica Saputry Ahmad Suseno Alfi Saadah Alfiansyah Alfiansyah Amilia Fauziyah Anisyah Anisyah Annisa Syifaurrahma Arnelli Arnelli Arum Dista Wulansari Aulia Zahra Ekaningsih Azwar Thaib Bara Yunianto Fathoni Brainy Happy Ana Tasiman Brainy Happy Ana Tasiman Brigita Maria Listyani Cut Rahmawati Daniswara, Lufthansyah Dayadi, Dayadi Didi Dwi Anggoro Didik Setyo Widodo Esti Ayu Faisal Syahputra Fandi Nasrun Cholis Faradina Azahra Zaqia Fauzan Musthafa Fitriani Solichah Galih N. R. Pargiman Gaurav A. Bhaduri Gunawan Gunawan HARTATI Hartati Hartati Hasim Muzadi Hendri Widiyandari Hendri Widiyandari Hendri Widyandari Husnayani, Husnayani Iis Nurhasanah Iis Nurhasanah Jamaluddin Ahmad Khalik, Suhartini Khoiri, Rahma Lia Handayani Lia Handayani Lia Handayani Linda Suyati Luqman Buchori M. S.H. Yoga S. Majid, Abdul Majid Zainuddin Mega Bara Cahyantari Muhammad Rusdi Nabila Amalia Izaaz Aanisa Narita Rizki Nayla Zahra Kamalia Nonci, Nurjannah Noor Afifah Nur Hidayati Nurhayati Nurhayati Nurhayati Nurhayati Nurjannah Nonci Nurul Latifah Pandji Triadiyaksa Pardoyo Pardoyo Pardoyo Pardoyo Popi Hadi Wisnu Wardhani Prasetya, Eko Fery Prisca Putri Elesta Pungki Hanipa Rahayu, R.A. Yunita Suci Rahayu, Yunita Suci Rahmatul Fazira Rahmawati Rahmawati Rasman Ratna Balgis Redi Joko Prasetyo Richard Leonardo Sianturi Rissa Kharismawati Rizka Andianingrum Roni Adi Wijaya Samratusabri Subehan Siringoringo, Eliezer Patardo Siti Fatimah Siti Nurhayati Siti Susanti, Siti Slamet Priyono Taslimah Taslimah Teguh Iman Prastyo Titik Lestariningsih Titik Lestariningsih Tri Windarti Tri Windarti Triadiyaksa, Pandji Trie Nanda Mulyana Trisnasari, Damayanti Ulya Hanifah Henrika Putri Vega Norma Rafika Putri Wijayanti, Septi Yeni Aprilia Yusrianti Yusrianti, Yusrianti Zainuddin, Abdul Majid