CD Tugas Akhir
Efektivitas Penjerapan Ion Cu2+ Menggunakan Karbon Aktif Batang Singkong (Manihot Esculenta)
ABSTRACT
The rapid development of the industry has led to an increasing amount of waste generated, including in the electroplating industry. The electroplating process produces liquid waste, which causes environmental pollution. The generated liquid waste contains heavy metals, such as copper (Cu). The maximum allowable concentration of copper ions (Cu2+) in the environment, based on Regulation of the Minister of Health of the Republic of Indonesia No. 492/ MENKES/PER/IV/2010, is 1.0 mg/L. Cassava stems have a relatively high carbon content, making them suitable for use as activated carbon as an adsorbent. This study investigated the effect of contact time and the amount of cassava stem activated carbon as an adsorbent on the adsorption capacity of copper ions (Cu2+) and the effectiveness of cassava stem activated carbon in adsorbing copper ions (Cu2+). The research began with the preparation of cassava stem samples with a size of -80/+100 mesh, followed by activation with 0.3 N NaOH for 8 hours. The characteristics of the obtained cassava stem activated carbon adsorbent were a moisture content of 4%, an ash content of 4.68%, and an iodine adsorption capacity of 753.786 mg/g. The adsorption process was conducted with varying adsorben mass of 10, 15, and 20 g, contact times of 30, 60, 90, and 120 minutes at an agitation speed of 90 rpm, and an adsorbate concentration of copper ions (Cu2+) at 10 mg/L. The optimal adsorption capacity was achieved at a contact time of 90 minutes with a mass of adsorbent of 10 g, which was 0.9041 mg/g. The highest adsorption efficiency was observed at a contact time of 90 minutes with a mass of 20 g of cassava stem activated carbon, which reached 94.94%.
Keywords: Adsorption, adsorbate, adsorption capacity, effectiveness, cassava stem activated carbon.
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