Effect of Degrading Transparent Oxo-Biodegradable Polyethylene Plastic Bags to Water Quality

Abstract

Polyethylene (PE) contributes largely to plastic wastes that exist in aquatic environments as a consequence of its widespread use. To address its low degradability, pro-oxidant fillers are incorporated into its polymer matrix, making it oxo-biodegradable. In this study, films from transparent oxo-biodegradable polyethylene plastic bags were immersed in deionized water at 50°C for 35 days. Indicators of water quality: pH, oxidation-reduction potential, turbidity, and total dissolved solids (TDS), were monitored every 7 days. It was observed that pH initially rises and then slowly decreases with time, oxidation-reduction potential decreases below the control, and turbidity and total dissolved solids both increase steadily with time. Moreover, films of smaller thickness lead to a dramatic increase in turbidity and TDS. The results imply that degrading oxo-biodegradable PE plastic bags result to significant reduction of water quality.

Recent developments in bio-based polyethylene: Degradation studies, waste management and recycling

“…Since the uses and applications of PE are uncountable due to their well-known mechanical properties, chemical inert, and good resistance behavior [ 12 ], it contributes to large contamination in several environments such as soil [ 69 ], water [ 70 ], and even crops [ 14 ].…”

“…The difficulty associated with PE utilization often arises from its inclination toward single-use materials; this situation intensified when individuals prioritized these materials over reusable alternatives and environmentally friendly [ 12 , 14 ]. As a result, plastics began to proliferate in the environment since the 1970s, marked by a significant surge in the ratio between production and deposition; this led to an accumulation issue primarily stemming from PE's resistance to degradation under typical ambient conditions [ [69] , [70] , [71] ].…”