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61,005 resultsShowing papers similar to Ecological and human health risk assessments of cyanotoxins and heavy metals in a drinking water supply reservoir
ClearMicroplastic and microcystin in tropical drinking water reservoir: pollution characteristics and human health risk assessment
Researchers surveyed microplastic and cyanobacterial toxin levels in a tropical drinking water reservoir in Vietnam over a one-year period. They found microplastics at all sampling sites, predominantly polypropylene and polyethylene fibers, with high polymer hazard scores despite low overall pollution levels. The co-occurrence of microplastics and microcystin toxins across the reservoir highlights the need for research on how these contaminants interact in freshwater drinking water sources.
Temporal Dynamics of Microcystins In Two Reservoirs With Different Trophic Status During The Early Growth Stage of Cyanobacteria
This study monitored toxic cyanobacteria and their microcystin toxins in two Chinese reservoirs during early spring when blooms were just beginning, finding that toxin levels varied with nutrient concentrations and algal community composition. Understanding early bloom dynamics helps water managers predict and prevent drinking water contamination from harmful algal bloom toxins.
Fate, abundance and ecological risks of microcystins in aquatic environment: The implication of microplastics
This review explores how microplastics in water can interact with microcystins, highly toxic compounds produced by harmful algal blooms, by adsorbing and transporting them through aquatic environments. The combination poses increased risks to human health because microplastics can carry these dangerous toxins into drinking water sources and through the food chain.
Distribution, Characteristics, and Ecological Risk Assessment of Microplastics and Heavy Metals in Surface Water at Hoa Binh Reservoir
Researchers sampled surface water in Hoa Binh Reservoir, Vietnam, during rainy and dry seasons, finding microplastics at all sites with fiber-dominated assemblages, and documenting co-occurrence with heavy metals including chromium, manganese, and lead.
Assessment of qualitative indicators of drinking water and their influence on human health, as ecological safety factor of population
This study assessed drinking water quality in the Lower Don region of Russia, focusing on cyanobacterial toxins produced by blue-green algae as indicators of water safety. Maintaining safe drinking water is a broader public health concern tied to the challenge of managing water pollution.
A review and assessment of cyanobacterial toxins as cardiovascular health hazards
Researchers reviewed over 100 studies on the cardiovascular effects of cyanotoxins—potent compounds produced by algal blooms in eutrophic waters—finding evidence of harm across seven toxin classes but concluding that typical environmental exposures pose a greater risk to the liver than the heart.
Understanding the Risks of Diffusion of Cyanobacteria Toxins in Rivers, Lakes, and Potable Water
This review covers the health risks of cyanobacteria (blue-green algae) toxins found in rivers, lakes, and drinking water, which can damage the liver and nervous system in humans. While not directly about microplastics, the research is relevant because microplastics in water can interact with cyanobacteria and their toxins, potentially serving as carriers that concentrate these harmful substances. The paper discusses various water treatment methods for removing cyanotoxins, many of which are also applicable to microplastic removal.
Adsorption of cyanotoxins on polypropylene and polyethylene terephthalate: Microplastics as vector of eight microcystin analogues
Eight microcystin analogues were tested for adsorption onto polypropylene and polyethylene terephthalate microplastics, finding that these common plastics can bind cyanotoxins from freshwater environments. The study identifies microplastics as potential vectors for cyanobacterial toxins in lakes and reservoirs, with implications for drinking water safety.
Co-Occurrence of Cyanobacteria and Cyanotoxins with Other Environmental Health Hazards: Impacts and Implications
This review examined cases and evidence of toxin-producing cyanobacteria co-occurring with other environmental hazards including algal toxins, pathogens, metals, pesticides, and microplastics, documenting combined exposure scenarios and calling for more research on synergistic toxic effects.
Distribution, risk assessment of heavy metals in sediments and their potential risk on water supply safety of a drinking water reservoir, middle China
Researchers assessed the distribution and risk of heavy metals in reservoir sediments, finding that bio-enrichment and bio-amplification pathways allow sediment-bound metals to enter the food chain and pose potential risks to downstream water supply safety.
Cyanobacteria Harmful Algae Blooms: Causes, Impacts, and Risk Management
This review covers harmful algal blooms caused by cyanobacteria, which release toxins that threaten fish, pets, livestock, and human health through contaminated water. The blooms are worsened by agricultural runoff and industrial pollution, and the authors call for better monitoring tools and standardized methods to detect and manage these toxic events.
Pollutant toxicology with respect to microalgae and cyanobacteria
This review examines the toxicological responses of microalgae and cyanobacteria to a wide range of pollutants, arguing that these organisms are valuable and sensitive indicators for aquatic ecotoxicological assessment.
Heavy Metals and Arsenic in Sediments of Xinfengjiang Reservoir in South China: Levels, Source Identification and Health Risk Assessment
Sediments in China's largest drinking water reservoir contained elevated levels of heavy metals including cadmium and arsenic, primarily from upstream agricultural and mining activities. This finding is concerning because microplastics in the same sediment can adsorb and concentrate these toxic metals, compounding contamination risks.
Interactions between cyanobacteria and emerging contaminants in aqueous environments
A review examined how cyanobacteria interact with emerging contaminants including microplastics in aquatic environments, finding that plastic surfaces can harbor cyanobacterial growth and influence toxin production. The interactions complicate pollution assessment and may amplify ecological risks in nutrient-rich waters.
Characteristics and ecological risks of microplastic pollution in a tropical drinking water source reservoir in Hainan province, China
Microplastic pollution was investigated in surface water and sediment of the Chitian Reservoir, a drinking water source in Hainan province, China. Microplastic abundance averaged 3.05 items per liter in surface water and 0.15 items per gram dry weight in sediment, with ecological risk assessed and potential drinking water contamination implications noted.
Combined risks of microplastics, trace metals, and antimicrobial resistance in the Nhue–Day River Basin, Vietnam
Researchers investigated the Nhue-Day River basin in Vietnam — a heavily industrialized and agricultural watershed — and found microplastics across all sampled sites acting as carriers for trace metals like lead, chromium, and arsenic, with fishponds showing 6.5 times higher microplastic levels than rivers. Antibiotic resistance genes were also detected near industrial discharge points, though a direct link to microplastics was less clear. The study provides an important baseline for a region where contaminated water is used directly for irrigation and fish farming, raising food safety concerns.
(Eco)Toxicology of Cyanobacteria and Cyanotoxins: From Environmental Dynamics to Adverse Effects
This review examines the ecotoxicology of cyanobacteria and cyanotoxins, covering the environmental dynamics driving harmful bloom formation under eutrophication and climate change, and the adverse effects of cyanotoxins on aquatic organisms, wildlife, and human health.
The Do pesticides and mycotoxins in water pose an exposure risk to humans?
This study reviewed published data on pesticide and mycotoxin contamination in drinking, well, tap, and river water from 2008 to 2023, finding concentrations as high as 88,732 nanograms per liter for pesticides. Risk assessments showed that children face the greatest exposure risk from contaminated water, highlighting the need for better water quality monitoring and treatment.
Ecological risk assessment of microplastics and heavy metals in Northern Vietnam's estuarine sediments: A case study of Ba Lat and Bach Dang
Researchers assessed microplastic abundance and ecological risk alongside ten heavy metals in estuarine sediments from the Ba Lat and Bach Dang estuaries of northern Vietnam's Red-Thai Binh River system, finding co-contamination patterns that pose compounded ecological risks to these biodiverse coastal ecosystems.
Ecological risk analysis and prediction of microplastics' effects on Microcystis aeruginosa in freshwater system: a meta-analysis approach
This meta-analysis found that micro- and nanoplastics can both inhibit and stimulate the growth of Microcystis aeruginosa — a harmful algal bloom cyanobacterium — depending on particle size and degradability. Smaller, degradable plastics tend to promote algal growth, suggesting microplastic pollution could worsen toxic algal blooms in freshwater systems used for drinking water.
Study on Water Quality and Trophic Status of Subtropical Cascade Reservoirs in Dongjiang River Basin in Dry Season
Researchers assessed the water quality and nutrient levels (trophic status) of three large reservoirs in China's Dongjiang River Basin during the dry season. These reservoirs supply drinking water to over 40 million people, making water quality monitoring — including for emerging contaminants like microplastics — essential for public health.
Emergence of microplastics in the aquatic ecosystem and their potential effects on health risks: The insights into Vietnam
This review examines the growing microplastic contamination in Vietnam's waterways, where concentrations in surface water vary enormously depending on location. Highly populated cities like Hanoi and Ho Chi Minh City show the highest levels, with plastics entering water through agricultural runoff, textile production, and consumer products. The contamination poses health risks to millions of people through drinking water and seafood consumption.
Evaluation of Water Quality and the Potential Ecological and Health Risk in the Cajititlán Lagoon
Not relevant to microplastics — this ecological study tracks physicochemical water quality parameters and heavy metal concentrations in a Mexican lagoon over 14 years to assess ecosystem health and human health risk, with no focus on plastic pollution.
Sorption of the common freshwater cyanotoxin microcystin to microplastics
Researchers demonstrated that microplastics from freshwater environments can adsorb the harmful algal bloom toxin microcystin onto their surfaces, potentially concentrating the toxin and altering its environmental fate. This finding suggests that microplastics in lakes with cyanobacterial blooms may act as carriers for toxins that affect fish, wildlife, and humans.