We can't find the internet
Attempting to reconnect
Something went wrong!
Hang in there while we get back on track
Microplastics may act as a vector for potentially hazardous metals in rural soils in Xiamen, China
AI summary Read the abstract
Researchers investigating rural soils in coastal Xiamen, China found microplastics at abundances up to 2,222 items/kg alongside eight potentially hazardous metals including arsenic, cadmium, and mercury, suggesting microplastics may act as vectors for metal transport across agricultural land. The co-occurrence of microplastics and toxic heavy metals in farmland soils amplifies human health risks, as both contaminants can be taken up by crops and enter the food supply simultaneously.
Soil represents a key reservoir for microplastics (MPs) in the terrestrial environment. Unfortunately, scientific endeavors on MP pollution in rural soils of coastal cities appear to be inadequate. The interconnection between rural soil MPs and potentially hazardous metals (PHMs) is underexplored. This work investigated the combined pollution of MPs and 8 PHMs (As, Cd, Cr, Cu, Zn, Pb, Hg, and Ni) in the rural soils of Xiamen, a typical coastal city in China. Sixteen sites were selected based on different administrative areas and representative land use types in Xiamen for surface soil sampling. MP selection and identification were performed using a stereo light microscope and Senterra II Compact Raman Microscope. MPs were analyzed for elemental composition using scanning electron microscopy with energy dispersive X-ray spectroscopy. Soil properties and PHMs concentrations were measured using the relevant industrial and national standards. The abundance of MPs ranged from 15 to 2222 items kg–1 with an average of 229 ± 523 items kg–1, suggesting that the rural soils have been widely disturbed by MP contamination. The dominant shape, color, and size of MPs were fragments (55.3%) and fibers (35.8%), transparent (59.3%) and white (17.7%), and < 1 mm (64.4%), respectively. Polypropylene (67.6%) was the main polymer type, followed by polystyrene (11.0%) and polyester (9.4%). The abundance of MPs (except for the most contaminated S13) was not highly associated with PHMs contents in rural soil. The energy dispersive X-ray spectra manifested irregular distribution of Zn and Pb on the MP surfaces at site S13. MP pollution was widespread in rural soils in Xiamen. MPs served as the potential vector that transmitted PHMs to soils at high levels of PHMs. The rural soil MPs in Xiamen may be originated from agricultural, industrial, and human activities. This study provides insights into combined contamination of MPs and PHMs in rural soils in Xiamen, which will help formulate effective pollution abatement measures.
More Papers Like This
Factors affecting the distribution of microplastics in soils of China
AI summary Read the abstract
Analyzing over 1,000 data points from 53 Chinese studies, researchers found highly heterogeneous microplastic distribution in soils, with highest concentrations near major rivers and monsoon-influenced agricultural regions, correlated with mulching film use, temperature, and precipitation. This regional mapping of microplastic abundance provides a framework for identifying human health exposure hotspots where soil microplastics can enter crops and food chains.
Navigating The Hidden Crisis: Microplastics And Heavy Metals in Soil- Transport, Impact, and Remediation
AI summary Read the abstract
Tiny plastic bits in soil don't just sit there, this review of existing research shows they can team up with toxic heavy metals already in the ground, making those metals up to 30-50% more likely to leach out and get absorbed by crops. That matters because it means the food grown in contaminated soil could carry more heavy metal contamination than previously thought, though scientists still need more real-world data to fully understand the risk to people who eat those crops.
Occurrence, sources, and relationships of soil microplastics with adsorbed heavy metals in the Ebinur Lake Basin, Northwest China
AI summary Read the abstract
In the arid Ebinur Lake Basin of northwest China, soil microplastic concentrations averaged 36 mg/kg, dominated by film-shaped PET and PP particles from industrial, agricultural, and domestic sources, with heavy metals co-occurring on their surfaces. The finding that microplastics serve as carriers for heavy metals in agricultural soils raises compounded contamination risks for crops, groundwater, and human health in water-scarce regions.
The Occurrence and Characteristics of Microplastic Pollution in the Agricultural Soils of Anhui Province, in Eastern China
AI summary Read the abstract
Researchers measured microplastic concentrations in agricultural soils across Anhui Province, China, finding levels of 660–17,660 particles/kg dry soil, with fibers and films dominating and concentration influenced by geographic location and crop type. This widespread contamination of farmland soils raises concerns about microplastics entering food crops and eventually the human diet through vegetable and grain production.
Systematic review of microplastics and heavy metals co-contamination on soils: The triple-chain effects of soil properties, crop responses, and biological communities
AI summary Read the abstract
Researchers reviewed how co-contamination of agricultural soils with microplastics and heavy metals interacts synergistically to exacerbate nutrient deficiencies, increase reactive oxygen species, and stunt plant growth, proposing a three-chain soil-crop-biota framework to reconcile contradictory findings and guide remediation strategies.
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.