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Quantified Effects of Multiple Parameters on Inputs and Potential Sources of Microplastics from a Typical River Flowing into the Sea

ACS ES&T Water 2022 14 citations ? Citation count from OpenAlex, updated daily. May differ slightly from the publisher's own count. Score: 35 ? 0–100 AI score estimating relevance to the microplastics field. Papers below 30 are filtered from public browse.

Yang Liu, Yang Liu, Yang Liu, Yang Liu, Yang Liu, Yang Liu, Yang Liu, Yang Liu, Yang Liu, Yang Liu, Yang Liu, Shu Tao, JinAo You, JinAo You, Yang Liu, Florian Breider Yang Liu, Yang Liu, Florian Breider JinAo You, Florian Breider Yang Liu, Yang Liu, Yang Liu, Yang Liu, Florian Breider Yang Liu, Yang Liu, Yang Liu, JinAo You, Yi Tang, Florian Breider Florian Breider Yang Liu, Yang Liu, Yang Liu, Florian Breider Yang Liu, Florian Breider Florian Breider Yang Liu, Florian Breider Florian Breider Florian Breider Yi Tang, Shu Tao, Shu Tao, Yang Liu, Yong He, Yong He, Yong He, Yang Liu, Florian Breider Florian Breider Wenxin Liu, Florian Breider Yang Liu, Florian Breider Florian Breider Shu Tao, Yong He, Yang Liu, Shu Tao, Florian Breider Florian Breider Yang Liu, Yang Liu, Florian Breider Yang Liu, Yang Liu, Wenxin Liu, Shu Tao, Shu Tao, Shu Tao, JinAo You, JinAo You, Wenxin Liu, Wenxin Liu, Yang Liu, Wenxin Liu, Wenxin Liu, Florian Breider Yang Liu, Wenxin Liu, Wenxin Liu, Yang Liu, Shu Tao, Shu Tao, Wenxin Liu, Shu Tao, Florian Breider Florian Breider Florian Breider Florian Breider Wenxin Liu, Florian Breider

Summary

Researchers quantified microplastic inputs from the Haihe River (a heavily urbanized seagoing river) into the sea using Manta trawl field sampling and a generalized additive model (GAM), finding lower abundance but higher polymer diversity during wet seasons and higher abundance during dry seasons. The study identifies multiple parameters including urbanization intensity and seasonal hydrology as drivers of riverine microplastic export to marine environments.

Polymers

PA PE PP PU

Study Type Environmental

As an important connection of terrestrial and marine ecosystems, rivers input multitudinous (micro)plastics into the oceans. However, comparisons of field and estimated riverine inputs of (micro)plastics and contributions of multiple parameters are limited. Herein, the mainstream Haihe River (MHR), a typical seagoing river under great pressure of high urbanization and industrialization, is studied as an example. Field samplings were conducted using a 100 μm Manta trawl, and a generalized additive model (GAM) was developed to interpret the differences between the local and estimated riverine inputs. Lower abundance (9.9 ± 7.2 items·m–3) with higher diversity, while higher abundance (11.3 ± 7.5 items·m–3) with lower diversity of microplastics was found during the wet and dry seasons. Polyethylene, polypropylene, and poly(ethylene terephthalate) may originate from nonseasonal sources, while polyamide and polyurethane may come from seasonal sources. The annual (2018–2019) riverine inputs of microplastics and plastics from the MHR into the Bohai Sea were 3.93–5.78 tons (3.91–5.76 billion items) and 30.81–38.67 tons (4.01–5.87 billion items), which were substantially lower than estimations from previous models. GAM gave the main parameters contributing to the variations in microplastics, including hydrochemical conditions (34.4%), dam interception (14.6%), sewage effluents (8.0%), and population density (1.1%). In addition to anthropogenic activities, the effects of hydrochemical conditions on microplastics should also be considered.

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