Abstract
Methyl Orange was a textile waste that polluted the environment and harmed aquatic ecosystems and human life. It could affect the photosynthesis of oxygen regeneration and disrupt the biological activity of microbes in the water. One of the ways to deal with these wastes by adsorption using Nata de coco. Nata de coco was used as an alternative adsorbent made from cellulose, which was a waste of coconut water in the process of making it easy, inexpensive, and biodegradable. This study aims to determine the effect of contact time and mass of Nata de coco adsorbents on the adsorption of methyl orange. This research method includes three stages were adsorbent preparation, adsorption, and UV-Vis spectrometer analysis. The adsorption process was carried out with contact time variations of 30 and 60 minutes, variations in the mass of the adsorbent 0.05g; 0.1g; and 0.15g. The results showed the optimum adsorption conditions occurred at 60 minutes of contact time and an adsorbent mass of 0.15g with an adsorption efficiency of 44.66% and an adsorption capacity of 0.2066 mg/g.
Highlights
Methyl Orange was a textile waste that polluted the environment and harmed aquatic ecosystems and human life
This study aims to determine the effect of contact time and mass of Nata de coco adsorbents on the adsorption of methyl orange
The results showed the optimum adsorption conditions occurred at 60 minutes of contact time and an adsorbent mass of 0.15g with an adsorption efficiency of 44.66% and an adsorption capacity of 0.2066 mg/g
Summary
Alat yang digunakan untuk penelitian adalah seperangkat alat gelas dan titrasi, oven, mangnetik stirrer timbangan analitik elektrik, pH meter Mettler. Nata de coco yang telah bersih kemudian direbus dengan air panas dan dikeringkan dalam oven selama 8 jam pada suhu 80oC. Dilakukan karakterisasi adsorben nata de coco, dengan menguji kadar airnya dengan menggunakan metode gravimetri dengan oven dan bilangan iod dengan menggunakan titrasi iodometri. Penentuan massa adsorben dan waktu kontak optimum oleh adsorben nata de coco pada adsorpsi methyl orange (Hidayati et al, 2016 dengan modifikasi). Kemudian ditambahkan adsorben nata de coco dengan variasi massa 0,05 g, 0,1 g dan 0,15 g dimasukan ke dalam masingmasing gelas kimia 100 mL yang berisi 15 mL larutan zat warna yang telah diatur pHnya. Setelah didapatkan waktu kontak optimum dan massa adsorben optimum maka dapat dihitung kapasitas adsorpsi dengan menggunakan persamaan berikut.
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