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Munkhbat, D.*; Battulga, B.; Oyuntsetseg, B.*; Kawahigashi, Masayuki*
Environmental Science and Pollution Research, 31(57), p.65548 - 65558, 2024/11
Plastic pollution in river environments has become an emerging concern in recent decades, and river plastic studies have received worldwide attention. However, most plastics research has focused on the dynamics of microsized plastics in surface water and sediments, whereas less research has been conducted on the gradual degradation and size reduction of plastics in the environment. Additionally, the migration of plastic debris between river compartments and changes in its properties are less understood despite their impact on its fate. In this study, we investigated changes in plastic debris distribution in terms of abundance, size, shape, polymer types, and photodegradation stages in the floodplain, surface water, and sediment compartments of the Tuul River system in Mongolia. The plastic abundance was 5.46
3.53 items/m
in the floodplain, 155100.7 items/m
in the surface water, and 128.476.3 items/kg in the sediment.
Battulga, B.; Munkhbat, D.*; Matsueda, Makoto; Atarashi-Andoh, Mariko; Oyuntsetseg, B.*; Koarashi, Jun; Kawahigashi, Masayuki*
Environmental Pollution, 357, p.124427_1 - 124427_10, 2024/09
Times Cited Count：1 Percentile：18.39(Environmental Sciences)The occurrence and characteristics of plastic debris in aquatic and terrestrial environments have been extensively studied. However, there is still limited information on the properties and dynamic behavior of plastic-associated biofilms in the environment. In this study, we collected plastic samples from an inland river system in Mongolia and extracted biofilms from the plastics to uncover the characteristics of the biofilms using analytical, isotopic, and thermogravimetric techniques. Mixtures of organic and mineral particles were detected from extracted biofilms, revealing the plastic as a carrier for exogenous substances including contaminants in the river ecosystem. The present study provides insights into the characteristics and environmental behavior of biofilms which are useful to elucidate the impact of plastic-associated biofilms on organic matter and material cycling in the aquatic ecosystems.
Munkhbat, D.*; Battulga, B.; Oyuntsetseg, B.*; Kawahigashi, Masayuki*
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