Effect of high pH found in low-level radioactive waste leachates on the antioxidant depletion of a HDPE geomembrane

被引：28

作者：

Abdelaal, Fady B. ^{[1
]}

Kerry Rowe, R. ^{[1
]}

机构：

[1] GeoEngineering Centre at Queen's-RMC, Queen's Univ., Ellis Hall, Kingston,ON,K7L 3N6, Canada

来源：

Journal of Hazardous, Toxic, and Radioactive Waste | 2017年 / 21卷 / 01期

关键词：

Antioxidants - High density polyethylenes - Radioactivity - Radioactive wastes;

D O I：

10.1061/(ASCE)HZ.2153-5515.0000262

中图分类号：

学科分类号：

摘要：

Antioxidant depletion from a high-density polyethylene (HDPE) geomembrane with hindered amine light stabilizers (HALS) immersed in three different high pHs solutions is examined over a 3-year period. The three solutions had the same concentration of inorganic salts but a range of pH (9.5, 11.5, and 13.5) likely to encompass those found in low-level radioactive waste leachate and other geoenvironmental applications. Increasing the pH from 9.5 to 13.5 increased the antioxidant depletion rates detected by both standard and high-pressure oxidative induction time tests (Std-OIT and HP-OIT) and also increased the residual HP-OIT values. Arrhenius modeling is used to predict the length antioxidant depletion stage for each solution. © 2015 American Society of Civil Engineers.

引用