We can't find the internet
Attempting to reconnect
Something went wrong!
Hang in there while we get back on track
Trace element profiles in the plastisphere of marine microplastics: A comparison of dry and wet seasons
AI summary Read the abstract
Tiny plastic bits floating in the ocean often get coated with a slimy layer of algae, bacteria, and other marine life—and this coating can trap potentially harmful trace metals like cadmium, lead, and zinc. This study found that most of these metals come from the surrounding seawater and organisms rather than the plastic itself, and the amount changes with the seasons (more marine life buildup in the wet season). This matters because these metal-coated microplastics can end up in seafood we eat, so understanding when and how they accumulate contaminants helps scientists better assess risks to our health.
Seasonal variations of trace elements in plastisphere are crucial for managing microplastic pollution and preserving marine ecosystems. The plastisphere plays an important role in regulating trace element accumulation on microplastics, yet its seasonal dynamics remain insufficiently understood. This study investigated the variations in trace element concentrations and their sources in the plastisphere from eight sampling sites in coastal waters of Hong Kong during November 2020 and May 2021, representing dry and wet seasons, respectively. Environmental parameters were monitored, and trace elements were analyzed using inductively coupled plasma mass spectrometry (ICP-MS). Scanning electron microscopy (SEM) images revealed diverse marine organisms adhering to microplastic surfaces during the wet season. Results showed significant differences in trace element concentrations between internal (microplastic) and external (suspended particulate matter (SPM) and plankton) sources. Negative correlations were observed between plastisphere mass and trace elements, while specific surface area showed positive correlations with certain trace elements. External sources appeared to be the main contributors to trace elements in the plastisphere, although a contribution from the microplastic could not be ruled out for several elements (Cd, Pb, Sb, Zn) in the dry season.
More Papers Like This
Quantification of Microplastics in North-Western Mediterranean Harbors: Seasonality and Biofilm-related Metallic Contaminants
AI summary Read the abstract
Researchers quantified microplastic concentrations in northwestern Mediterranean harbours across seasons. They found that microplastic abundance fluctuated with season and was influenced by factors such as rainfall, wind, and nearby human activities.
Microplastics as a vehicle of heavy metals in aquatic environments: A review of adsorption factors, mechanisms, and biological effects
AI summary Read the abstract
This review summarizes how microplastics in water can absorb and carry toxic heavy metals like lead and cadmium, making them more dangerous to aquatic life than either pollutant alone. Environmental factors such as water acidity, salinity, and organic matter influence how much metal sticks to microplastic surfaces. Since contaminated seafood is a major source of human exposure, understanding these interactions is important for assessing health risks.
Quantification of Microplastics in North-Western Mediterranean Harbors: Seasonality and Biofilm-Related Metallic Contaminants
AI summary Read the abstract
Scientists measured microplastic concentrations in three Mediterranean harbors across seasons, finding higher levels in summer (coinciding with peak boating activity) and detecting heavy metals associated with plastic biofilms. Harbors are identified as significant hotspots for microplastic pollution that spreads into surrounding coastal waters.
Trace metals concentrations in seawater and on microplastic particles from Mala Martinska beach sediments near Šibenik
AI summary Read the abstract
Researchers determined trace metal concentrations on microplastic particles and in seawater from a Croatian Adriatic beach, finding measurable accumulation of zinc, cadmium, lead, and copper on plastic surfaces. The results confirm that microplastics in coastal sediments can concentrate heavy metals to levels above surrounding water concentrations.
Macro and micro plastics sorb and desorb metals and act as a point source of trace metals to coastal ecosystems
AI summary Read the abstract
Researchers collected plastic debris from nine urban intertidal areas in Vancouver, Canada, and analyzed the metals sorbed onto different polymer types. They found that environmental plastics carried significantly higher metal concentrations than newly manufactured plastics, with zinc, copper, cadmium, and lead all detected. The study suggests that both macro and micro plastics act as point sources of trace metal contamination in coastal ecosystems.
Research digests by email
When a large batch of papers lands in the Atlas, we read through it and send a short write-up of what stood out.