Chemical Engineering

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https://repository.unri.ac.id/handle/123456789/87

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Browsing Chemical Engineering by Subject "adsorption"

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    Regenerasi Spent Bleaching Earth (SBE) dan Aplikasinya Pada Adsorpsi Ion Cu(II)
    (2013-01-16) Aulia, Barkatul; Sahan Yusnimar; Zahrina Ida
    Spent bleaching earth (SBE) is an adsorbent waste of bleaching units in the crude palm oil (CPO) refinery industry. Principally, the SBE can be regenerated and reused as an adsorbent. This research aims to regenerate SBE and determine the influence of particle size variations and temperature in the activation of regenerated spent bleaching earth (RSBE) adsorption on Cu(II) ionic. Particle sizes variations is used (60, 100 and 200 mesh) and the activation temperature (270, 370 and 470oC) to obtained the best conditions for the regeneration process. This regeneration process through the remaining stages of oil extraction using hexane solvent. Furthermore, the material is activated with 3% HCL acid and then reactivated using high temperatures. The result of SBE regeneration (RSBE) tested the adsorption ability in solution ion Cu(II) 20 mg/Liter for 10 hours. Based on the results showed that the best RSBE adsorption power on the condition that the particle sized of 200 mesh and activation temperature 470oC with adsorption 2,002 mg Cu/g RSBE.
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    Studi Kinetika Adsorpsi Logam Cu2+ dengan Menggunakan Adsorben Zeolit Alam Teraktifasi
    (2013-08-26) Hidayati, Betty; Sunarno,; Yenti Silvia Reni
    Copper metal is a heavy metal from industrial waste and relatively often found as contaminants in the water, because it was the presence of copper metal waste should be minimized. One method that has been developed to minimize the presence of Cu2+ is the metal adsorption process, is one of the natural zeolite adsorbents are widely used for the adsorption process because it is widely available in nature and has a high selectivity. This study aims to determine a suitable kinetic model for metal adsorption process of Cu2+ to see the power adsorption activated natural zeolite and the influence of temperature on the adsorption rate constant. The study was conducted by varying the contact time (0, 15, 30, 45, 60, 75 and 90 minutes) and temperature (300C, 400C and 500C). Copper metal adsorption results were analyzed using atomic absorption spectrophotometer (AAS). The result showed that the model is suitable for metal adsorption kinetics of Cu2+ with activated natural zeolite following the model of first order with a value of k = 0.0119 min-1 for the variation of the contact time and each k = 0,0111 min-1; 0,0123 min-1; 0,0145 min-1 for a temperature variation of 300C, 400C and 500C and the value of the activation energy for the adsorption process is equal to 10,841 kJ/mol.