这篇发表在1982年2月的AWWA杂志上的文章只考虑了实验室专栏研究。本附录提供了有关等温线（容量）和动力学（柱）因素的重要数据，这些数据支持了原始文章中描述的有关相对再生效率的一般结论。包括2个参考文献，图。

The article as published in the February 1982 issue of JOURNAL AWWA considered only laboratory column studies. This addendum presents important data on isotherm (capacity) and kinetic (column) factors which support the general conclusion on relative regeneration efficiencies described in the original article. Includes 2 references, figure.