Pengaruh Ukuran Partikel dan Kecepatan Pengadukan Terhadap Penyerapan Fenol Menggunakan Biosorben Kulit Kelengkeng (Dimocarpus longan Lour)

Abstract

Pulp Industry produces phenol liquid wastes that pollute the environment. Phenol is a dangerous organic compound that has hight toxicity so that the presence of phenol in the environment will disrupt the surrounding ecosystem and have an impact on human health. To overcome the problem of environmental pollution, an adsorpstion method is used by utilizing longan skin as an adsorbent. Longan shell is used as an adsorben able to bind phenol in the environment because it has several active groups such as amines, hydroxyl, carbonyl, and carboxyl which can form hydrogen banding with phenol solution. The purpose of this study was to determine the optimum conditions with variation in adsorbent particel sizes af 106, 150, 250, and 425 mm and stirring speeds of 50, 100, 150, 200, and 250 rpm. Phenol was analized using UV-Vis spectrophotometer (Specord 210). Adsorption phenol with longan shell biosorbent obtained optimum conditions at an adsorbent particle size of 106 with adsorption capacity of 4.583 mg/g and stirring speed of 200 rpm with adsoption capacity of 4.200 mg/g.