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61,005 resultsShowing papers similar to Releasing characteristics and risk of micro/nanoplastics from Chinese herbal decoction packages under daily usage scenarios
ClearFirst assessment of microplastic exposure from heated liquid herbal medicine: Packaging breakdown and ingestion risk
Researchers assessed microplastic release from heated liquid herbal medicine packaged in flexible plastic pouches and found that heating significantly increased the number of particles released. Microwave heating and hot-water baths both produced substantially more microplastic contamination than unheated samples. The study raises concerns about an overlooked source of microplastic ingestion from a widely consumed traditional health product.
Microplastics in marine-derived traditional Chinese medicine, potential threat to patients
Researchers detected microplastics in all nine types of marine-derived traditional Chinese medicines tested, with abundances ranging from 0.07 to 9.53 items per gram, representing the first documented evidence of microplastic contamination in these widely consumed medicinal products.
微纳米塑料在典型日用塑料制品使用过程中的释放规律及机制
This Chinese study investigated the release of micro- and nanoplastics from everyday plastic products including food containers, tableware, and clothing during normal use, characterizing release rates and mechanisms and estimating daily human exposure from common household items.
Micro (nano) Plastics Released from Plastic Food Containers
Researchers found that plastic food containers release micro- and nanoplastics into food under both hot-water and microwave heating, with the quantity increasing with repeated reuse, raising concerns about dietary exposure from everyday kitchen plastics.
Prevalence of microplastics in animal-based traditional medicinal materials: Widespread pollution in terrestrial environments
Researchers found microplastics in all 20 types of traditional Chinese medicinal animal materials tested, with an average occurrence rate of 94.67% and polyethylene terephthalate (40.45%) as the dominant polymer. The findings indicate that terrestrial environments are significantly contaminated with microplastics and raise concerns about health exposure through traditional medicine consumption.
Microplastics and nanoplastics in tea: Sources, characteristics and potential impacts
This review looks at how microplastics and nanoplastics end up in tea, with plastic teabags being the biggest culprit, releasing over a billion tiny particles per bag when steeped in hot water. Even biodegradable and composite tea bags release significant amounts of plastic particles, raising health concerns given that tea is one of the most widely consumed beverages in the world.
First evidence of microplastic contamination in bottled herbal distillates: A quantitative and qualitative assessment of Iranian brands
Researchers detected microplastics in 92% of Iranian bottled herbal distillate samples, finding an average contamination level of 7.32 particles per liter, primarily fibers and fragments smaller than 500 micrometers in transparent, white, or black colors. The study provides the first evidence of microplastic contamination in bottled herbal distillates, implicating plastic packaging used during production, transportation, and storage as potential contamination sources.
Unveiling the hidden threat of microplastic in paper cups and tea bags: a critical review of their exacerbation and alarming concern in India
Researchers reviewed how everyday paper cups and tea bags release microplastics and toxic chemicals — including phthalates and heavy metals — into hot beverages, with plastic coatings and bag materials breaking down during normal use, posing underappreciated health risks especially in tea-heavy cultures like India.
Investigating the release of microplastics from tea bags into tea drinks and human exposure assessment
Researchers tested tea bags from five brands in Iran and found that every brand released microplastics into the tea, with an average of over 500,000 particles per bag. The most common plastics were cellulose acetate and nylon fibers, mostly in the 10-50 micrometer size range. Based on typical tea consumption, children and adults could be ingesting thousands of microplastic particles per kilogram of body weight daily just from drinking tea.
Nanoplastic release from disposable plastics: Correlation with maximum service temperature
Testing five types of disposable plastics confirmed that nanoplastic release correlates with maximum service temperature, with materials used beyond their temperature limits releasing significantly more nanoplastics when packaging hot food, cooking in ovens, or using microwaves.
Health risks posed by microplastics in tea bags: microplastic pollution – a truly global problem
This study examines the health risks associated with microplastics released from tea bags during the brewing process. Researchers highlight that commonly used tea bag materials like polypropylene and nylon can release significant numbers of microplastic particles and potentially harmful chemicals when exposed to high temperatures. The study suggests that microplastic contamination in tea bags, along with associated compounds like heavy metals and fluorine, warrants further investigation to protect consumer health.
Nanoplastics release from polystyrene foam containers
Researchers found that polystyrene foam instant noodle containers release significantly more nanoplastics when exposed to hot water above 70°C, and that residual oil from fried noodles amplifies particle release tenfold by physically damaging the foam's cellular structure, raising food safety concerns about this common packaging.
Determination of the microplastic particle release by tea bags during brewing
Researchers measured the release of microplastic particles from tea bags during brewing, finding that plastic particles leach into the hot beverage. This study highlights an often-overlooked source of microplastic ingestion through everyday food and drink preparation.
The release of polylactic acid nanoplastics (PLA-NPLs) from commercial teabags. Obtention, characterization, and hazard effects of true-to-life PLA-NPLs
Scientists found that commercial teabags release about one million nanoplastic particles made of polylactic acid (PLA) into each cup of tea during normal brewing. When tested on lab-grown intestinal cells, these nanoplastics were taken up at high rates and caused changes in the structure and function of the gut barrier. This suggests that even "biodegradable" plastics in food packaging may expose people to significant amounts of nanoplastics.
Nanoplastics in heat-sensitive food packaging: A review of migration, detection, health, and environmental impacts
This review examines how heating food in plastic packaging causes micro and nanoplastics to migrate into food, covering the mechanisms of release, detection methods, and health concerns. Heat accelerates the breakdown of plastic packaging, releasing particles and chemical additives that can be consumed along with the food. The authors highlight the need for stronger regulations and safer packaging alternatives to reduce human exposure to plastics through heated food.
The coexistence characteristics of microplastics and heavy metals in rhizomes of traditional Chinese medicine in mulch planting area
Researchers examined eight types of traditional Chinese medicine root products and found microplastic contamination in all of them, with concentrations ranging from about 21 to 44 particles per gram. The dominant microplastic types were polyurethane and acrylic fragments, and these particles showed a tendency to carry heavy metals like arsenic, lead, and chromium. The findings raise concerns about unintentional human exposure to both microplastics and associated toxic metals through herbal medicine consumption.
Microparticles and microplastics released from daily use of plastic feeding and water bottles and plastic injectors: potential risks to infants and children in China
Researchers found that daily-use plastic feeding bottles, water bottles, and medical injectors commonly used for Chinese infants and children release significant numbers of microparticles and microplastics when exposed to heat and sterilization. The study estimated that infant exposure through these sources could be substantial, raising concerns about microplastic ingestion during early development.
Microplastics in polystyrene-made food containers from China: abundance, shape, size, and human intake
Researchers analyzed polystyrene food containers sold in China for microplastic contamination, examining the abundance, shape, and size of particles released. The study found that these containers shed microplastics during normal use, with hot liquids and acidic foods increasing the amount of plastic released. The results raise concerns about daily microplastic exposure from common food packaging.
Hidden risk of microplastics in milk tea and coffee: A case study from China's freshly-made beverage market
Researchers tested 105 freshly made milk tea and coffee drinks from seven popular brands in China and found microplastics in 93% of the samples. The average cup contained about 10 particles, primarily polyamide, polyurethane, and PET, which likely originated from the surrounding environment rather than the ingredients themselves. The study estimates that Chinese adults may consume around 25 microplastic particles per kilogram of body weight each year from these beverages alone.
Nanoplastics - A Potential Threat To Human Health?
This thesis examined the inflammatory properties of nanoplastics in the context of both nanomedicine development and understanding health risks from nanomaterial waste. It evaluated whether nanoplastics could trigger immune responses in human cells, which is a key concern given increasing exposure through food and air.
Nanoplastics from disposable paper cups and microwavable food containers
Researchers found that disposable paper cups coated with low-density polyethylene released up to 26 times more nanoplastics than polylactic acid-coated cups, and that hot water exposure substantially increased nanoplastic release from both cup types.
Plastic Teabags Release Billions of Microparticles and Nanoparticles into Tea
Researchers discovered that steeping a single plastic teabag at brewing temperature releases approximately 11.6 billion microplastics and 3.1 billion nanoplastics into a cup of tea. These particle levels are several orders of magnitude higher than those previously reported in other foods. Toxicity testing on water fleas showed that exposure to these released particles caused dose-dependent behavioral and developmental effects.
Measurement of Residual Amount of Nanoplastics in vivo from Disposable Paper Cups
This study found that disposable paper cups lined with plastic release nanoplastics into hot beverages and that these nanoplastics can persist in the body. The results suggest that using single-use paper cups for hot drinks is a significant and largely overlooked source of nanoplastic exposure in daily life.
Microplastics in Widely Used Polypropylene-Made Food Containers
Researchers found that all 210 polypropylene takeout food containers sampled from seven Chinese cities contained microplastics, with 3 to 43 particles per container, suggesting widespread human exposure to microplastics through commonly used food packaging.