CD Skripsi
Pengaruh Suhu Kalsinasi Pada Karakter Lempung Talanai Yang Diaktivasi Dengan Sodium Hidroksida Menggunakan Metode Refluks
Natural clay has the disadvantage of low cation exchange capacity and not resistant to heating. This weakness resulted in the use of natural clays as adsorbents not provide optimal results. Activation of the physico-chemical characteristics are expected to improve the natural clay. In this study, activated natural clays with 2M NaOH reflux method using three-neck round flask connected to a condenser and clays then calcined at a temperature of 300oC, 400oC and 600oC for 3 hours and also made clay activation without calcination. Clay activation result identified by XRD analysis and characterized by parameters Si / Al ratio using the gravimetric method, CEC using Nessler reagent, Acidic and basic sites with alkalimetri and acidimetry titration method, and the surface area of absorption based on methylene blue clay was measured by spectrophotometry. XRD analysis results indicate that the activation of natural clay kaolinite using NaOH lead turned into sodium alumina silicate. Characterization results showed an increase in CEC, surface area, acid and alkaline clay site activation, but the Si / Al ratio decreased. Activation clay CEC value meq/100g 487.94 (LATK); 370.98 (LAk3); 381.94 (LAk4); 372.80 (LAk6), surface area of 24.77 m 2 / g (LATK); 6, 99 (LAk3); 8.78 (LAk4); 7.46 (LAk6), acidity 1.225 mmol / g (LATK); 1.075 (LAk3), 0.75 (LAk4); 0.487 (LAk6);, alkalinity of 1.087 mmol / g (LATK); 0.875 (LAk3); 0.662 (LAk4); 0.375 (LAk6), and the ratio of Si / Al 2.901 (LATK); 3,527 (LAk3); 5,720 (LAk4); 5.388 (LAk6).
Keywords: Clay, Reflux, Activation, Calcination
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