Chloride Ion Adsorption Capacity of Anion Exchange Resin in Cement Mortar

Abstract

This paper presents the effect of anion exchange resin (AER) on the adsorption of chloride ions in cement mortar. The kinetic and equilibrium behaviors of AER were investigated in distilled water and Ca(OH)2 saturated solutions, and then the adsorption of chloride ions by the AER in the mortar specimen was determined. The AER was used as a partial replacement for sand in the mortar specimen. The mortar specimen was coated with epoxy, except for an exposed surface, and then immersed in a NaCl solution for 140 days. The chloride content in the mortar specimen was characterized by energy dispersive X-ray fluorescence analysis and electron probe microanalysis. The results showed that the AER could adsorb the chloride ions from the solution rapidly but had a relatively low performance when the pH of its surrounding environment increased. When the AER was mixed in the cement mortar, its chloride content was higher than that of the cement matrix around it, which confirms the chloride ion adsorption capacity of the AER.

Chloride Resistance of Portland Cement-Based Mortar Incorporating High Aluminate Cement and Calcium Carbonate

“…We also determined that the higher the chloride binding capacity (see Section 3.3), the higher the amount of diffused chloride in the mortar. This can be due to the driving force in a concentration gradient [63,64]. Additionally, the diffusion coefficient using the Holliday equation (D h ) (Equation (11)) was investigated [67] to support the previous interpretation regarding D a and D i .…”

“…In particular, the AM shows a much higher total chloride content at low depths from the surface compared with the PM and CM. As the high chloride binding capacity can result in the total chloride near the surface due to the driving force in a concentration gradient [63,64], the total chloride content near the surface could be much higher in the AM. Table 6 shows the experimental results of the chloride migration and natural diffusion tests.…”

Handling heat‐stable salts in post‐combustion CO2 capture: A detailed survey

“…Several studies have been successful in removing different anions from waste water solutions using ion exchange procedures, e.g. chloride 123–126 . nitrate, 127–132 sulfate, 133–135 phosphate, 136–138 and acetate 123,139 .…”

“…chloride. [123][124][125][126] nitrate, [127][128][129][130][131][132] sulfate, [133][134][135] phosphate, [136][137][138] and acetate. 123,139 Ion exchange procedures present a chemically facile approach for alkanolamine reclamation, and its performance is deemed satisfactory for HSS removal with regards to its less chemical involvement, low energy requirement, and significantly suppressed solution foaming.…”

Penyisihan Kadar Fe dan Cl Menggunakan Carbon Teraktivasi di Desa Kemudi Gresik

“…Hal ini mengindikasikan jenis reaksi yang terjadi adalah endoterm [13]. Proses adsorpsi Cl membutuhkan proses pertukaran ion (ion exchange) [15] sehingga carbon teraktivasi belum mampu untuk menjerap banyak ion Cl dari larutan [16].…”