CD Tugas Akhir
Penentuan Konsentrasi Optimal Larutan Regenerasi Resin Kation
Water demineralization is the process of removing minerals in water through an ion exchange process using cation exchange resin and anion exchange resin media so that it can produce water that has a high level of purity. Ion exchange resin is a polymerized hydrocarbon compound. This compound has cross-links or by another name it is called cross-linking, has functional groups and has ions that can be exchanged with ions of other compounds. Ion exchange resins have limited capacity in ion exchange. In cation resins, resin that has been saturated is no longer able to bind cation ions which have the lowest affinity in raw water such as sodium, thus causing sodium leakage. Therefore, to restore its function, the resin must be regenerated. Regeneration is the operation of replacing the absorbed ions with the initial ions that were originally in the resin matrix and taking the capacity to the initial level or to the desired level. The chemical used for this regeneration process is hydrochloric acid (HCl). This research aims to determine the optimal HCl concentration in the regeneration process. The method used in this experiment was the soaking (maceration) method with varying HCl concentrations of 1%, 2%, 4%, 6%, 8% and 10%. The results obtained in this study were that optimal results were obtained at a HCl concentration of 6% with a sodium (Na) value of 145.3 ppb, a conductivity value of 185.7 μs/cm, a pH value of 3.46, a total dissolved solid value of 92.5 mg/l.
Key Word : Resin, Hydrochloric Acid, Optimum, Regeneration
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