In this study, we first examined the sorption of Pd on MX-80 in Na-Ca-ClO₄ solution as a function of (3–9) and ionic strength (0.1 M–4 M) and confirmed that the experimentally derived values could be fitted by a 2-site protolysis nonelectrostatic surface complexation and cation exchange (2SPNE SC/CE) model using three binary surface complexation constants previously estimated. Then, we investigated the sorption of Pd on MX-80 in Na-Ca-Cl-ClO₄ solution as a function of (3–9) and molar concentration ratio (0–∞) at the ionic strength = 4 M. We found that the sorption of Pd on MX-80 in Na-Ca-Cl-ClO₄ solution could be simulated only by the three binary and one ternary surface complexations (). This suggests that the contribution of other ternary surface complexations such as ≡S-OH ≡ ( = 1, 2 and 3) to Pd sorption in Na-Ca-Cl-ClO₄ solution with ionic strength = 4 M was negligibly small.

中文翻译：

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高离子强度的三元反应对Na-Ca-Cl溶液中MX-80在Pd上吸附的贡献

在这项研究中，我们首先研究了Na-Ca-ClO ₄溶液中MX-80对Pd的吸附与（3–9）和离子强度（0.1 M–4 M）的关系，并证实了实验得出的值可以通过使用先前估计的三个二元表面络合常数，由2位分解非静电表面络合和阳离子交换（2SPNE SC / CE）模型拟合。然后，我们研究了Na-Ca-Cl-ClO ₄溶液中MX-80对Pd的吸附与（3–9）和离子强度= 4 M时的摩尔浓度比（0–∞）。我们发现MX-80在Na-Ca-Cl-ClO ₄溶液中对Pd的吸附只能通过三个二元和一个三元表面络合物来模拟（）。这表明其他三元表面络合物（如≡S-OH）的贡献 ≡（= 1、2和3）在离子强度= 4 M的Na-Ca-Cl-ClO ₄溶液中对Pd的吸附很小。