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NY_sky

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中文：与单独吸附TC不同的是，在酸性条件下协同吸附的TC吸附量较低，且随着pH的增加其显著增加，在pH 6.5时达到峰值，随着pH进一步增加至碱性时，吸附量下降。与单独吸附Zn2+相比，TC的存在对Zn2+的吸附影响不大。上述结果可归因于水溶液中配合物（TC-Zn2+）的形成或者表面桥联（TC-或Zn2+）的作用，在酸性条件下H3O+会竞争吸附位点，使吸附不明显。随着pH增至6.0，对吸附的促进作用明显增强，Zn2+和TC的吸附量均达到峰值。pH进一步达到碱性时，Zn2+和TC的亲和力减弱，由于其脱质子的影响，静电斥力的作用使TC和Zn2+的吸附量显著下降[25]。因此，在协同吸附Zn2+和TC的实验中，最适pH值为6.0。

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mlyywd

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NY_sky: 金币+200, 翻译EPI+1, ★★★★★最佳答案 2019-10-17 20:22:48

Different from the adsorption of TC alone, the adsorption of TC by synergistic adsorption under acidic conditions was low. It increased significantly with the increase of pH, peaked when the pH was 6.5, and decreased when pH further increased to the alkaline range. Compared with the adsorption of Zn2+ alone, the presence of TC has little effect on the adsorption of Zn2+. The above results can be attributed to the formation of complexes (TC-Zn2+) in aqueous solution or the impact of surface bridging (TC- or Zn2+). Under acidic conditions, H3O+ will compete for adsorption sites, so the adsorption is not obvious. As the pH increased to 6.0, the promotion effect of adsorption was significantly enhanced, and the adsorption of Zn2+ and TC peaked. When the pH was further alkaline, the affinity between Zn2+ and TC was weakened. Due to the influence of deprotonation, the electrostatic repulsion significantly reduced the adsorption of TC and Zn2+ [25]. Therefore, in the experiments of synergistic adsorption of Zn2+ and TC, the optimum pH was 6.0.