Cl⁻ adsorption and intercalated ions release processes during LDHs are highly intricate phenomena. In this study, ion exchange performance of LDHs with specific cation interlayers and intercalated anions (CaAl–NO₃-LDHs, CaAl–NO₂-LDHs, CaFeAl–NO₃-LDHs and CaFeAl–NO₂-LDHs) were extensively investigated. The results indicate that in the presence of low chloride concentration, the intercalated anions are prematurely released due to partial dissolution of LDHs in neutral deionized water and ion exchange with OH⁻ in alkaline simulated concrete pore solution. Therefore, Cl⁻ adsorption of LDHs and release process of intercalated anions in LDHs are not completely synchronized. Compared to partial LDHs dissolution, the accelerating effect of OH⁻ exchange on intercalated anion release in simulated concrete pore solution is more pronounced. Further, higher stability of LDHs in testing solutions is mainly corresponding to higher binding energy between intercalation ions and cation interlayers, thus saturated Cl⁻ adsorption content of NO₃-LDHs with high binding energy is higher than NO₂-LDHs with low binding energy, and saturated Cl⁻ adsorption content of CaAl-LDHs with high binding energy is higher than CaFeAl-LDHs with low binding energy in testing solutions.

LDH 期间的Cl ^-吸附和嵌入离子释放过程是非常复杂的现象。在本研究中，广泛研究了具有特定阳离子夹层和插层阴离子的LDH（CaAl–NO ₃ -LDHs、CaAl–NO ₂ -LDHs、CaFeAl–NO ₃ -LDHs 和CaFeAl–NO _{2 -LDHs）的离子交换性能。}结果表明，在低氯浓度存在的情况下，由于LDH在中性去离子水中部分溶解以及在碱性模拟混凝土孔隙溶液中与OH ^{-进行离子交换，插层阴离子过早释放。}因此，LDHs的Cl-^吸附和LDHs中嵌入阴离子的释放过程并不完全同步。与部分LDH溶解相比，OH ^-交换对模拟混凝土孔隙溶液中插层阴离子释放的加速作用更加明显。此外，测试溶液中LDHs较高的稳定性主要对应于插层离子与阳离子层间的结合能较高，因此高结合能的NO _{3 -LDHs的饱和Cl} ^-吸附含量高于低结合能的NO ₂ -LDHs，测试溶液中高结合能CaAl-LDHs的饱和Cl ^-吸附量高于低结合能CaFeAl-LDHs。