Khotimchenko M Y, Kolenchenko E A, Khotimchenko Y S
Department of Pharmacy, Vladivostok State Medical University, Vladivostok 690990, Russia.
J Colloid Interface Sci. 2008 Jul 15;323(2):216-22. doi: 10.1016/j.jcis.2008.04.013. Epub 2008 May 16.
The zinc-binding activity of different water-soluble pectin compounds varying according to their degree of esterification and of insoluble calcium pectate beads in aqueous solution was studied in a batch sorption system. The zinc uptake by all pectin compounds was highest within the pH range from 4.0 to 7.0. The binding capacities and rates of zinc ions by pectin compounds were evaluated. The Langmuir, Freundlich, and BET sorption models were applied to describe the isotherms and constants. Sorption isotherm data could be well interpreted by the Langmuir equation. The results obtained through the study suggest that pectin compounds are favorable sorbents. The largest number of zinc ions are bound by pectin with the degree of esterification close to zero. Therefore, it can be concluded that low-esterified pectins are more effective substances for elimination of zinc ions from aqueous disposals.
在间歇吸附系统中，研究了不同水溶性果胶化合物（其锌结合活性随酯化程度而变化）以及不溶性果胶酸钙珠在水溶液中的情况。所有果胶化合物对锌的吸收在pH值4.0至7.0范围内最高。评估了果胶化合物对锌离子的结合容量和速率。应用朗缪尔、弗伦德里希和BET吸附模型来描述等温线和常数。吸附等温线数据可以用朗缪尔方程很好地解释。研究结果表明，果胶化合物是良好的吸附剂。酯化程度接近零的果胶结合的锌离子数量最多。因此，可以得出结论，低酯化果胶是从水性处理物中去除锌离子更有效的物质。
