Sorption of cationic organic substances onto synthetic oxides: Evaluation of sorbent parameters as possible predictors.
Sorption of cationic organic substances onto synthetic oxides: Evaluation of sorbent parameters as possible predictors.
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合成氧化物上阳离子有机物质的吸附：评估吸附剂参数作为可能的预测因子
DOI：
10.1016/j.scitotenv.2018.05.393
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发表时间：
2018
期刊：
影响因子：
--
通讯作者：
Börnick
中科院分区：
文献类型：
--
作者：
Kutzner;Schaffer;Börnick
了解阳离子有机物质在水生系统中的吸附行为对于进行风险评估至关重要，因为在水圈中检测到的此类化学品越来越多。它们的吸附行为受到矿物表面上的吸附过程的强烈影响（例如，氧化物、粘土）。为了有助于预测工具的发展，在高度理想化的模型系统中研究了吸附剂特性对吸附强度的影响。除了固相的性质外，还改变了直接竞争吸附位点的其他离子的浓度和山梨酸盐的分子结构，以分离离子交换和非离子交换过程。该研究包括在总共120个系统的柱实验，使用五个广泛表征的合成氧化物（三个硅胶，两个氧化铝），三个探针分子（两个结构相关的阳离子物质，一个中性化合物），和四个明显不同的NaCl浓度。结果表明，吸附剂表面上的OH基团的浓度是一个有意义的描述所观察到的吸附容量到不同的氧化物的变化。化合物特定的线性相关性，使吸附系数的预测。此外，一个更复杂的吸附行为的有机阳离子相比，不带电的分子被观察到的吸附结果表明，在不同的电解质浓度。因此，这项研究提供了一个重要的一步，更好地了解有机阳离子吸附的主要机制。然而，进一步的工作，使用其他吸附剂，包括天然的和其他探针分子，需要验证的范围内开发可靠的预测模型的阳离子吸附确定的关系。
Knowledge on the sorption behavior of cationic organic substances in aquatic systems is vital for their risk assessment due to the increasing detection of such chemicals in the hydrosphere. Their sorption behavior is strongly influenced by sorption processes onto mineral surfaces (e.g., oxides, clays). To contribute to the development of prediction tools, the impact of sorbent characteristics on the sorption strength was studied in a highly-idealized model system. In addition to the properties of the solid phase, the concentration of other ions in direct competition for sorption sites and the molecular structure of the sorbate were changed to separate ion exchange and non-ion exchange processes. The study includes in total 120 systematic column experiments using five extensively characterized synthetic oxides (three silica gels, two aluminum oxides), three probe molecules (two structurally related cationic substances, one neutral compound), and four distinctively different NaCl concentrations. The results show that the concentration of OH groups on the sorbent surface is a meaningful descriptor for the observed variations in sorption capacity onto different oxides. Compound-specific linear correlations were obtained, enabling the prediction of sorption coefficients. In addition, a more complex sorption behavior of organic cations compared to uncharged molecules were observed as demonstrated by the sorption results at different electrolyte concentrations. Thus, the study provides an important step towards a better principal mechanistic understanding of organic cation sorption. However, further work using other sorbents including natural ones and other probe molecules is needed to verify the identified relationships within the scope of developing reliable prediction models for cation sorption.
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影响因子：
9.9
作者：
Susann Kutzner;M. Schaffer;T. Licha;E. Worch;H. Börnick
通讯作者：
Susann Kutzner;M. Schaffer;T. Licha;E. Worch;H. Börnick
影响因子：
11.4
作者：
Florian Metzelder;T. Schmidt
通讯作者：
Florian Metzelder;T. Schmidt
有机阳离子对天然有机物的离子交换亲和力：两种不同 pH 下胺类型和非离子相互作用的影响。
影响因子：
11.4
作者：
S. Droge;K. Goss
通讯作者：
K. Goss
影响因子：
12.8
作者：
Susann Kutzner;M. Schaffer;H. Börnick;T. Licha;E. Worch
通讯作者：
Susann Kutzner;M. Schaffer;H. Börnick;T. Licha;E. Worch
二氧化硅-水电解质界面上决定电位的离子的吸附以及一些阳离子的作用
影响因子：
4.5
作者：
T. Tadros;J. Lyklema
通讯作者：
J. Lyklema