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New insights into the distribution and interaction mechanism of microplastics with humic acid in river sediments

Chemosphere 2022 25 citations ? Citation count from OpenAlex, updated daily. May differ slightly from the publisher's own count. Score: 40 ? 0–100 AI score estimating relevance to the microplastics field. Papers below 30 are filtered from public browse.

Minghong Xie, Minghong Xie, Xiqing Wang, Pengjiao Tian, Pengjiao Tian, Atif Muhmood, Atif Muhmood, Atif Muhmood, Atif Muhmood, Minghong Xie, Atif Muhmood, Minghong Xie, Pengjiao Tian, Xian Cui, Pengjiao Tian, Pengjiao Tian, Xian Cui, Pengjiao Tian, Yingjie Su, Yingjie Su, Xian Cui, Yuqi Li Yuqi Li Yuqi Li Yingjie Su, Yingjie Su, Haizhong Yu, Xian Cui, Yuqi Li Binbin Gong, Xiqing Wang, Pengjiao Tian, Binbin Gong, Haizhong Yu, Pengjiao Tian, Yingjie Su, Haizhong Yu, Yuqi Li Haizhong Yu, Haizhong Yu, Haizhong Yu, Xiqing Wang, Yuqi Li Xian Cui, Wenying Fan, Wenying Fan, Xiqing Wang, Yuqi Li

Summary

Researchers found that microplastics and humic acids interact significantly in river sediments, with humic acid coating altering microplastic surface properties and affecting their distribution at different sediment depths, influencing the environmental fate and pollutant-carrying capacity of microplastics.

Study Type Environmental

Information on the distribution and interaction of microplastics (MPs) and humic acids (HAs) in river sediment has not been fully explored. This study assessed the distribution and interaction of MPs with HAs at different depths in river sediments. The results delineated that the average abundance of MPs in the 0-10 cm layer (190 ± 20 items/kg) was significantly lower than that in the 11-20 cm and 21-30 cm layers (211 ± 10 items/kg and 238 ± 18 items/kg, respectively). Likewise, the large MP particles mainly existed in the 0-10 cm layer (31.53%-37.87%), while small MP particles were found in the 21-30 cm layers (73.23%-100%). Moreover, HAs in MPs showed a transformation from low molecular weight to high molecular weight with an increase in depth from 0-10 cm to 21-30 cm, which may contribute to the distribution of MPs in the river sediments. These results provide new insight into the migration of MP pollution in river sediments, but further research needs to assess the interaction of MP with HA for mitigating MP pollution in river sediment.

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