156.<Science of the Total Environment>Degradation and adsorption behavior of biodegradable plastic PLA under

作者: 时间:2022-06-24 点击数:


With the increasing pollution of plastics and the widespread use of polylactic acid (PLA), its weathering process in the
natural environment needs to be studied. Hence, we investigated the characteristics of PLA under conventional weathering conditions and the adsorption behavior between PLA and tetracycline (TC). The results showed cracks and holes in the weathered PLA surface, an increase in oxygen-containing functional groups, and a 77.94 % decrease in contact angle, causing more amount of TC to be adsorbed. The maximum adsorption capacity of PLA for TC is approximately 3.5 times higher than before weathering due to multilayer physical adsorption. Nevertheless, the surface of the microplastics weathered by seawater did not change significantly. This work elucidates the weathering mechanism of biodegradable microplastics under abiotic conditions, thus correctly assessing the difference in natural and conventional degradability of biodegradable plastic.

版权所有:Copyright 2018. 环境功能材料研究中心 All rights reserved.

地址:上海市杨浦区四平路1239号 邮编:200092