| dc.description.abstract | The environmental issues caused by single-use plastic products have received extensive attention from various countries, and have been banned and replaced. Polylactic acid plastic has become an alternative for many products to be used. PLA plastics are rapidly decomposed by microorganisms in a compost field with appropriate temperature and humidity, but compared with the global usage, a large area of land is still required for composting. The purpose of this study is to investigate the decomposition and aging of PLA plastics in different water bodies, as well as their adsorption of heavy metals, in order to infer the degree of harm to the environment and organisms of PLA plastics that do not enter the recycling system.
In this study, PLA plastic sheets were placed in three aging environments (25°C without light, 60°C, and 60°C with light), with different exposure environments (air, deionized water, artificial seawater, artificial fresh water, and artificial fresh water plus humic acid). , respectively, after 5, 10, 15, 20 and 30 days of aging, the physical properties were analyzed, and the hydrolysis reaction was calculated through the decrease of the molecular weight of PLA. Then, the plastic sheets aged for 30 days were taken to carry out the adsorption experiments of copper and lead. | en_US |