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Department Of Chemistry, Faculty Of Mathematics And Natural Sciences, Sriwijaya University, Jl. Palembang-Prabumulih Km 32, Ogan Ilir 30662, Indonesia
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Chitosan-ZnO Composite for Removal of Methylene Blue Desnelli, Desnelli; Yulinda, Leidya; Fernando, David; Fatma, Fatma; Mara, Ady
IJFAC (Indonesian Journal of Fundamental and Applied Chemistry) Vol 8, No 3 (2023): October 2023
Publisher : IJFAC (Indonesian Journal of Fundamental and Applied Chemistry)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24845/ijfac.v8.i3.133

Abstract

This study aims to determine the effectiveness and increase in absorption of the chitosan-ZnO composite in the process of removing methylene blue when using the photodegradation method with the help of a UV lamp. Chitosan was synthesized from shrimp shell waste composite with metal oxide ZnO. The results of the characterization using XRD obtained the diffraction peak for chitosan at an angle of 2θ, namely 19.85°; 29.43°; 34.76° and chitosan-ZnO composite at an angle of 20.18°; 28.93°; 33.57° The SEM-EDX characterization shows that chitosan-ZnO has small, light-colored grains and more gaps and contains elements of chitosan and Zn. In the FTIR characterization, there was a decrease in intensity at a peak of around 3360 cm-1 which was caused by the chitosan-ZnO composite producing OH groups which reacted with methylene blue dye. In testing the effect of contact time using a UV lamp, there was an increase in the percentage of degraded methylene blue compared to without using a UV lamp. The maximum contact time is obtained at 60 minutes. While testing the effect of methylene blue dye concentration, the maximum absorption concentration was 45 ppm at 60 minutes of contact time. The adsorption capacity of the composite against methylene blue dye without UV light was 18.91 mg/g while using a UV lamp it increased to 20.145 mg/g. Based on this research, the chitosan/ZnO composite can be used quite well as a methylene blue dye remover.Keywords: Chitosan, Chitosan-ZnO, Photodegradation, Adsorption, Methylene blue.
REPRESENTASI KINERJA PEMERINTAH DALAM PENANGANAN BENCANA BANJIR SUMATERA 2025 (ANALISIS ISI KUANTITATIF SENTIMEN BERITA PADA MEDIA NASIONAL) Nurdyansa, Nurdyansa; Halim, Abdul; Fatma, Fatma
CORE: Journal of Communication Research Vol 4 No 1 (2026): CORE, JANUARI 2026
Publisher : CORE: Journal of Communication Research

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47650/core.v4i1.2585

Abstract

Penanganan bencana alam merupakan uji kritis bagi akuntabilitas dan responsivitas pemerintah dalam paradigma tata kelola pemerintahan modern. Penelitian ini bertujuan untuk menganalisis representasi kinerja pemerintah pusat dan daerah dalam penanganan bencana banjir Sumatera tahun 2025 melalui pemberitaan media nasional. Menggunakan metode analisis isi kuantitatif (quantitative content analysis), penelitian ini mengkode 150 artikel berita dari tiga media nasional utama (Kompas.com, Detik.com, dan Antara News) selama periode tanggap darurat Januari hingga Februari 2025. Hasil penelitian menunjukkan polarisasi sentimen yang signifikan di mana 55% berita bernada negatif, 35% positif, dan 10% netral. Narasi positif didominasi oleh kunjungan kepemimpinan eksekutif dan komitmen anggaran, sedangkan narasi negatif berfokus pada keterlambatan evakuasi dan inkonsistensi data korban. Temuan ini mengindikasikan bahwa meskipun pemerintah berupaya membangun citra responsif melalui komunikasi simbolis, media tetap berfungsi sebagai mekanisme akuntabilitas sosial yang menyoroti kesenjangan antara narasi resmi dan realitas lapangan. Penelitian ini menyimpulkan bahwa integrasi ilmu pemerintahan dan komunikasi diperlukan untuk memahami dinamika citra publik dalam manajemen krisis, serta menekankan pentingnya transparansi data sebagai fondasi kepercayaan publik
Co-Authors A Halim Abdurrachman Rahim Addy Rachmat Ady Mara, Ady Affandy, Fachrudin Fiqri Afreni Hamidah Agus Syafriansyah Aldi Herbanu Alfarado, Daniel Alifia, Frida Almunadi T Panagan Amiruddin Amiruddin Ananda, Muhammad Rafly Andi Jumardi Armizi, Armizi Aslim Aslim Audria, Alya Ayyub, Fachrie Rezka Bakarbessy, Maria Lea Frensy Basri, La Ode Ali Basri, St Risnawati Belo, Janet Jalisar Bijak Riyandi Ahadito Caesar, Abiyyu Daimatunna’ma, Qaima Darmawati Darmawati Dede Arseyani Pratamasyari Dedi Rohendi Desneli Desneli Desnelli Desnelli Elisa Nurnawati Erniwati Erniwati Ester Lidya Fachrijal Fachrijal Fahma Riyanti Fathuddin Fathuddin, Fathuddin Ferlinahayati Ferlinahayati Fernando, David Firdaus Firdaus Ganggang Canggi Arnanto Garing, Syiane Getari Kasmiarti Ghozali, Ghozali Gimin Gimin Hamzah, Nur Asia Hariani*, Poedji Loekitowati Hartati Tamti, Hartati Hasan, Ani Mustapa Heni Yohandini Hermansyah Hermansyah Hesti Ratnasari, Hesti Hidayani, Mesalina Tri Idrus, Muh Ikhsan Irfan Hidayat, Irfan Irfany Irfany, Irfany Ismail Ismail Isman, Muh Johanis, Sheehan Juliansyah Juliansyah Julinar Julinar Julinar Julinar Kustam, Sri Rukmini Lapong, Muhammad Imran Lestari, Mirna Lorenzo, Mario Angelo W M , Rudin. Mahdar, Mahdar Manik, Nijusiho Mannan, Muhammad Ramdan Abdul Manurung, Yolanda Fany Claudia Masra Latjompoh Mega Elfia Miksusanti Miksusanti Moh. Taufik Ridha Muhammad Ramdan Abdul Mannan Muhammad Said Muhammad Said Muhammad Said MUHAMMAD SAID Muhammad Saleh Muhammad Shuhufi, Muhammad Mukadas, Aswati Musifa, Eva Mustafa Kamal Mustafa Kamal Noor Riefma Hidayah Nova Yuliasari Nova Yuliasari Nova Yuliasari Nur Fadhila Amri Nuraeni L Rapi Nurdyansa Nurmala Nurmala Nurpaila, Sri Nursyahran Nursyahran Nursyahran, Nursyahran Oktaviani, Lisa Wahidatul Paindan, Esterina Natalia Poedji Loekitowati Poedji Loekitowati Hariani Pratama, Nisa Manora Pratiwi, Ira Eka Putri, Dewi Diansa Putri, Rahayu Nadia Rahmadi Nirwanto, Rahmadi Rahmah Rahmah Rajindra Risfidian Mohadi Risna Risna, Risna Rizki Indah Putri Rizkiani, Delisa Rohani, Adelia Rohima Sera Afifah Rosa Devitria Sabila Yunita Saharuddin R. Sokku Saleh Ridwan, Muhammad Salfigo, Rahdin Fiqri Salni Salni Salni Salni Salni Sampe, Ipan Sarman Sarman Sasmita, Yanti Satrianingsih, Andi Sera, Rohima Setiawan, Lukman Shinta Lestari Siti Rahmawati Sri Wulandari Suarman Suheyanto Suheryanto Sulardi . Suliyya , Lafifah Sumardi Sumardi Susanto, Donatus Susi Herlinda Theresia Evy Yulianti Nedeak Tismi Dipalaya, Tismi Tjurmin Ginting Ulfah, Baiq Maulinda Waskita, Kukuh Jalu Widia Purwaningrum Widiastuty , Hesty Wiwin Sepriani Yeni Suryani Yulia Yesti, Yulia Yulinda, Leidya Yuyun, Yuyun Zaitun Qamariah, Zaitun Zulfikar Zulfikar