Environmental degradation of polyacrylamides. 1. Effects of artificial environmental conditions: temperature, light, and pH
| Autor: | Susan L. Prues, Frederick W. Oehme, Eldon A. Smith |
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| Rok vydání: | 1996 |
| Předmět: |
Light
Polymers Health Toxicology and Mutagenesis Polyacrylamide Acrylic Resins Glycine Hydrolysis chemistry.chemical_compound Ammonium Acrylamide Acrylamides Chromatography Photolysis Depolymerization Chemistry Public Health Environmental and Occupational Health Temperature General Medicine Hydrogen-Ion Concentration Pollution Quaternary Ammonium Compounds Degradation (geology) Amine gas treating Thickening agent |
| Zdroj: | Ecotoxicology and environmental safety. 35(2) |
| ISSN: | 0147-6513 |
| Popis: | A polyacrylamide thickening agent (PATA) was formulated at four concentrations in distilled-deionized water, without and with a glyphosate-surfactant herbicide (GH). Over a 6-week period, these mixtures were exposed to various controlled temperature and light conditions. Acrylamide concentration, ammonium concentration, and pH were measured at weekly intervals to assess the degradation of polyacrylamide and acrylamide. Satellite studies were conducted to examine the effect of altered pH on solutions of PATA (i.e., does pH promote polyacrylamide depolymerization?) and GH binding to amine groups (i.e., protection from degradation). The results of these studies suggest that polyacrylamide can degrade to acrylamide by thermal and photolytic effects, that changes in pH do not promote the depolymerization of polyacrylamide, and that GH does protect polyacrylamide and acrylamide from environmental degradation. Statistically there was no linear correlation between the various parameters measured. |
| Databáze: | OpenAIRE |
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