A Comprehensive Method of Ion Exchange Resins Regeneration and Its Optimization for Water Treatment

Abstract

Ion exchange membranes, specifically resin technology, lie at the heart of electrolytically conductive systems used in the treatment of wastewater. This chapter deals with ion exchange deionization and the effect of resin amount as well as the concentration of acid and base on the product conductivity. The strong acidic cation polymeric exchanger resin is commercially called MERCK 104765 cation exchanger IV with capacity greater than 3.2 mmol/ml, while the strong basic anion polymeric exchanger resin is commercially called MERCK 104767 anion exchanger III with capacities greater than 1.0 mmol/ml. Water conductivity, as an indicator of regeneration efficiency, was monitored over time at the different conditions and scenario. In general, it was observed that the conductivity decreases with time until one point is reached and then starts to increase as a result of resin saturation. It was also noticed that the lowest conductivity is achieved when using 1-vol% NaOH and 5-vol% HCl in the cathodic and anodic resin tubes, respectively, and that water conductivity increases with the increase in the amount of water being used. The amount of resin significantly impacts the deionization efficiency; more ions are removed as the amount of resin increases.

Response surface methodology guided adsorption and recovery of free fatty acids from oil using resin

“…Thus, it can be concluded that regenerating with 5% NaOH performed better than 4% NaOH, presumably, by enabling the recovery of active sites. It has been observed that the regeneration process allows recovery of about 60–80% of the resin capacity, 19 which agrees with our results. The reason for the decrease in %FFA adsorption can be attributed to the inefficient generation of active sites as well as loss of resin particle size and sphericity.…”

“…Ion‐exchange resin are susceptible to chemical or physical deactivation or neutralization of their active sites 18 . However, an advantage of using resins is the ability to recover their ion‐exchange capabilities by using regenerants, 19 so that they can be reused for multiple cycles. For Amberlite FPA51, the manufacturer recommends regenerating with 4% NaOH for a minimum of 30 min.…”

Efektivitas Perubahan Setting Waktu Step Rinsing Pada Proses Regenerasi Mixed Bed Di Water Treatment Plant Unit 7,8 Pt. Pomi

“…Pertukaran ion adalah pertukaran stoikiometri reversible ion antara fase padat (resin) dengan larutan, biasanya resin sebagai penukar ion tidak larut dalam media dimana pertukaran ion terjadi [7]. Pertukaran ion bisa secara efektif menghilangkan Natrium, Klorida, Kalsium, Magnesium dan ion lainnya untuk menghasilkan air murni yang dibutuhkan oleh industri.…”

Tratamientos avanzados para la potabilización de aguas residuales

“…Estas tienen un ion movible con carga positiva. Por su parte, las aniónicas poseen una carga negativa [31]. Además, durante su regeneración suelen someterse a diluciones de bases o ácidos fuertes [32].…”