Haidar Sitie Rafidah, Prasetia H, Saefumillah A. Adsorption Study of Methylene Blue and Methyl Red on Activated Carbon from Silver Composite Using the Extract of Spent Coffee Grounds. j. sains materi indonesia [Internet]. 2024 May 4 [cited 2024 Dec. 21];25(2):77-84. Available from: https://ejournal.brin.go.id/jsmi/article/view/924