不同果胶化合物在水溶液中的铈结合活性。

Cerium binding activity of different pectin compounds in aqueous solutions.

机构信息

Department of Pharmacology, Vladivostok State Medical University, Primorskiy krai, Russia.

出版信息

Colloids Surf B Biointerfaces. 2010 May 1;77(1):104-10. doi: 10.1016/j.colsurfb.2010.01.015. Epub 2010 Feb 4.

DOI:10.1016/j.colsurfb.2010.01.015

PMID:20153610

Abstract

Cerium binding activity of different water soluble pectin compounds varying according to their degree of esterification and insoluble calcium pectate beads in aqueous solution was studied in a batch sorption system. The cerium uptake by all pectin compounds was highest within the pH range from 4.0 to 6.0. The binding capacities and rates of cerium ions by pectin compounds were evaluated. The Langmuir, Freundlich and BET sorption models were applied to describe the isotherms and constants. Sorption isothermal data could be well interpreted by the Langmuir equation. The results obtained through the study suggest that pectin compounds are favorable sorbents. The largest amount of cerium ions is 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 cerium ions from aqueous disposals.

摘要

在批量吸附系统中研究了不同水溶性果胶化合物根据酯化程度的铈结合活性和不溶性钙果胶珠在水溶液中的结合活性。所有果胶化合物的铈摄取量在 pH 值为 4.0 至 6.0 的范围内最高。评估了果胶化合物对铈离子的结合容量和速率。应用 Langmuir、Freundlich 和 BET 吸附模型来描述等温线和常数。吸附等温线数据可以很好地用 Langmuir 方程来解释。研究结果表明，果胶化合物是有利的吸附剂。带负电荷的果胶化合物通过离子交换和表面络合作用吸附阳离子。带负电荷的果胶化合物通过离子交换和表面络合作用吸附阳离子。最大量的铈离子被酯化程度接近零的果胶结合。因此，可以得出结论，低酯化果胶是从水性处理中去除铈离子的更有效物质。