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Spatiotemporal variations of microplastics and influencing factor analysis in coastal seawater of Qingdao, China
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Researchers surveyed microplastic pollution in the coastal waters of Qingdao, China, and found average concentrations of 293 to 412 particles per cubic meter, with higher levels in summer. The distribution pattern showed increasing concentrations from east to west, influenced by ocean currents, urban runoff, and tourism activity. The study provides a detailed picture of how human activity and environmental factors shape microplastic pollution patterns along a major coastal city.
Microplastic pollution in coastal zones has attracted widespread attention, as coastal zones act as significant reservoirs of microplastics. Yet impacts of human and environmental factors on microplastic distribution in specific coastal areas remain elusive. This study combined stereomicroscope and micro-FT-IR technical to investigate the abundance and composition characteristics of microplastics in the coastal seawater of Qingdao in 2024 and analyze the potential factors affecting the spatiotemporal distribution of seawater microplastics. Results showed that the average microplastic abundance in coastal seawater was 293.0 ± 125.4 items/m in June and 412.0 ± 152.4 items/m in August. An east-to-west increasing trend in the microplastic abundance was observed, with the Zhanqiao Pier (ZQ) exhibiting the highest values. The microplastics found in the coastal seawater were mainly fibers in shape, black and blue in color, 1000-2000 μm in size, and rayon and PET in polymer types. Principal Component Analysis (PCA) showed large spatial heterogeneity in microplastic characteristics between study sites, particularly in August. The results demonstrated that tourism activities, population density, ocean currents, and rainfall were the major factors affecting the spatiotemporal distribution of seawater microplastics. These findings underscore the need for effective management strategies to mitigate the impact of human activities on microplastic pollution in coastal environments.
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The seasonal distribution characteristics of microplastics on bathing beaches along the coast of Qingdao, China
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Researchers surveyed microplastic pollution at six bathing beaches along the coast of Qingdao, China, across winter and summer seasons. Microplastic abundance in both seawater and sediment was significantly higher in summer, and concentrations increased from east to west, consistent with coastal current patterns. The study suggests that human recreational activity and urbanization contribute to higher microplastic levels at these popular beach destinations.
Spatial Patterns of Microplastics in Surface Seawater, Sediment, and Sand Along Qingdao Coastal Environment
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This study examined microplastic distribution across seawater, sediment, and beach sand at 10 zones around Qingdao, China, finding concentration patterns strongly associated with the type of human activity at each site. Abandoned aquafarms and harbors showed the highest contamination, and chlorinated polyethylene fragments dominated all environmental compartments.
Analysis of the Current Situation of Marine Garbage and Microplastic Pollution in Typical Coastal Areas of Qingdao
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Researchers investigated coastal marine debris and microplastic pollution at two beaches in Qingdao, China, examining the types, sources, components, and spatiotemporal distribution through field surveys, sample analysis, and component identification. The study proposed management responses including strengthened public education, stricter monitoring measures, and promotion of technological innovation and international cooperation.
Monitoring of micro-plastics: a case study of shilaoren beach, Qingdao, China
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Researchers measured microplastic occurrence and composition in beach sediments at Shilaoren Beach, Qingdao, China, finding 561 microplastic particles across sampling sites. The results confirm widespread microplastic contamination of beach sediments even at tourist beaches, adding to evidence of plastic pollution along Chinese coastlines.
Spatial and Temporal Distribution Characteristics and Potential Sources of Microplastic Pollution in China’s Freshwater Environments
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Researchers surveyed microplastic pollution across freshwater environments in 21 major Chinese cities and found an average concentration of about 3,500 particles per cubic meter. The most common types were fibers, and concentrations generally increased from western to eastern China, closely tracking levels of human activity. The study found that microplastic abundance peaked in summer, likely driven by increased rainfall washing particles into waterways.
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