Elvina E, Oktavia B, Nasra E, Zainul R. Optimation of Fe3+ Ion Desorption Using Sulfonate Modified Silica Gel-GPTMS. J. Pijar.MIPA [Internet]. 2024 Sep. 30 [cited 2024 Nov. 24];19(5):933-7. Available from: http://jurnalfkip.unram.ac.id/index.php/JPM/article/view/7453