A5062525025- Environmental Toxicology and Ecotoxicology
- Heavy metals in environment
- Mercury impact and mitigation studies
- Aquatic Ecosystems and Phytoplankton Dynamics
- Radioactive element chemistry and processing
- Geochemistry and Elemental Analysis
- Nanoparticles: synthesis and applications
- Heavy Metal Exposure and Toxicity
- Toxic Organic Pollutants Impact
- Pharmaceutical and Antibiotic Environmental Impacts
- Arsenic contamination and mitigation
- Aquatic Invertebrate Ecology and Behavior
- Ocean Acidification Effects and Responses
- Marine Bivalve and Aquaculture Studies
- Calcium Carbonate Crystallization and Inhibition
- Water Quality and Pollution Assessment
- Microplastics and Plastic Pollution
- Marine and coastal ecosystems
- Metabolomics and Mass Spectrometry Studies
- Graphene and Nanomaterials Applications
- Trace Elements in Health
- Pesticide and Herbicide Environmental Studies
- Recycling and Waste Management Techniques
- Coal and Its By-products
- Isotope Analysis in Ecology
Xiamen University
2016-2025
State Key Laboratory of Marine Environmental Science
2021-2024
GEOMAR Helmholtz Centre for Ocean Research Kiel
2024
Ministry of Education of the People's Republic of China
2021
Université de Montréal
2016
Hong Kong University of Science and Technology
2008-2011
University of Hong Kong
2008-2011
Abstract Carbon dots (CDs) are photoluminescent nanomaterials with wide-ranging applications. Despite their photoactivity, it remains unknown whether CDs degrade under illumination and such photodegradation poses any cytotoxic effects. Here, we show laboratory-synthesized irradiated light into molecules that toxic to both normal (HEK-293) cancerous (HeLa HepG2) human cells. Eight days of irradiation photolyzes 28.6-59.8% the <3 kilo Dalton molecules, 1431 which detected by...
Algal blooms bring massive amounts of algal organic matter (AOM) into eutrophic lakes, which influences microbial methylmercury (MeHg) production. However, because the complexity AOM and its dynamic changes during decomposition, relationship between Hg methylators remains poorly understood, hinders predicting MeHg production bioaccumulation in shallow lakes. To address that, we explored impacts on by characterizing dissolved with Fourier transform ion cyclotron resonance mass spectrometry...
In coastal waters, particulate metals constitute a substantial fraction of the total metals; however, prevalent water quality criteria are primarily based on dissolved metals, seemingly neglecting contribution metals. Here we developed method to quantify toxicity risk and proposed way calculate modifying factors (MFs) for setting site-specific in turbid waters. Specifically, used side-by-side experimental design study copper (Cu) bioaccumulation an estuarine clam, Potamocorbula laevis, under...
Suspended particulate matter (SPM) carries a major fraction of metals in turbid coastal waters, markedly influencing metal bioaccumulation and posing risks to marine life. However, its effects are often overlooked current water quality criteria for metals, primarily due challenges quantifying SPM's contribution. This contribution depends on the SPM concentration, distribution coefficients (Kd), bioavailability SPM-bound (assimilation efficiency, AE), which can collectively be integrated as...
Microplastics (MPs) are pollutants of global concern, and bioaccumulation determines their biological effects. Although microorganisms form a large fraction our ecosystem's biomass important in biogeochemical cycling, accumulation MPs has never been confirmed natural waters because current tools for field samples can detect only > 10 μm. Here, we show that stimulated Raman scattering microscopy (SRS) image quantify the small (<10 μm) protozoa. Our label-free method, which differentiates by...
ADVERTISEMENT RETURN TO ISSUEPREVViewpointNEXTEstuarine Pollution of Metals in China: Science and MitigationWen-Xiong Wang†‡*, Ke Pan†, Qiaoguo Tan‡, Laodong Guo§, Stuart L. Simpson∥View Author Information† Division Life Sciences, Hong Kong University Technology, Clearwater Bay, Kowloon, Kong‡ Key Laboratory Coastal Wetland Ecosystems, Ministry Education, College the Environment Ecology, Xiamen University, 361102, China§ School Freshwater Wisconsin-Milwaukee, 600 East Greenfield Avenue,...
Water chemistry is generally thought to influence metal toxicity via affecting bioavailability and bioaccumulation, but its effects on tissue residue-based are poorly known. We conducted tests in parallel with uptake kinetics experiments of cadmium (Cd) waters different calcium (Ca) concentrations pH levels using acclimated Daphnia magna as a model organism. Both the acute Cd were reduced by higher Ca concentration lower pH. Strikingly constant median effective influx rates (EJ(50), 1.3-1.6...
Relating the toxicity of metals to their internal concentration is difficult due complicated detoxification processes within organisms. Only metabolically available are potentially toxic organisms, while in detoxified form toxicologically irrelevant. Accordingly, we developed a two-compartment toxicokinetic-toxicodynamic model for freshwater cladoceran, Daphnia magna. The toxicokinetics simulated bioaccumulation processes, toxicodynamics quantitatively described corresponding development....
Salinity has considerable effects on the toxicity of metals in estuarine waters. The salinity are manifold, making it difficult to summarize for risk assessments. In this study, we separated and quantified multiple cadmium (Cd) a toxicokinetic–toxicodynamic framework. clam, Potamocorbula laevis, was used as model organism. Cd bioaccumulation measured using stable-isotope-tracer technique; parallel, tests were conducted. With increase from 5 30, uptake decreased monotonically. contrast,...
Abstract Surface ocean pH is declining due to anthropogenic atmospheric CO2 uptake with a global decline of ~0.3 possible by 2100. Extracellular influences range biological processes, including nutrient uptake, calcification and silicification. However, there are poor constraints on how levels in the extracellular microenvironment surrounding phytoplankton cells (the phycosphere) differ from bulk seawater. This adds uncertainty impacts environmental change. Furthermore, previous modelling...
Short-term (60 min) europium (Eu) biouptake fluxes by the freshwater green alga Chlamydomonas reinhardtii were investigated in presence and absence of ligands (e.g., malic acid citric acid) a second rare earth metal, samarium (Sm). Data interpreted context biotic ligand model, which uses experimentally determined stability constants to take into account competition complexation metal interest. In or competitors, Eu was well described Michaelis-Menten equation with maximal uptake flux (Jmax )...
In oysters, Cu and Zn concentration can reach extraordinarily high (1-2% of tissue dry weights), leading to intense green or blue colors in oyster tissues. It is thus puzzling how oysters detoxify the excessively accumulated metals. Here, we used X-ray absorption spectroscopy examine speciation two "colored" (Crassostrea hongkongensis Crassostrea sikamea) collected from a severely metal-contaminated estuary. contaminated found much higher proportion as oxygen- nitrogen-bonded species,...
Metal contamination is a major problem in many estuaries. Toxicokinetic models are useful tools for predicting metal accumulation estuarine organisms and managing the associated ecological risks. However, obtaining toxicokinetic parameter values with sufficient predictive power challenging dynamic waters. In this study, we determined toxicokinetics of multiple metals oyster Crassostrea hongkongensis estuary polluted by using 48 day transplant experiment. During experiment, concentrations...
The toxicity of arsenic (As) targets specific tissues organisms, while the biotransportation As among fish remains poorly understood. In present study, radiotracer techniques followed by a physiologically based pharmacokinetic (PBPK) modeling were applied to simulate (absorption, distribution, and elimination) 73As(V) biotransformation As(V) in marine medaka Oryzias melastigma after waterborne exposure. Fish simulated six-compartment model assuming that blood was intermediate exchange...
Bivalves are often employed for biomonitoring contaminants in marine environments; however, these large-scale programs, unavoidably, using multiple species presents a significant challenge. Interspecies differences contaminant bioaccumulation can complicate data interpretation, and direct comparisons among may result misleading conclusions. Here, we propose robust framework based on toxicokinetic measurements that accounts interspecies bioaccumulation. Specifically, via recently developed...
The dissolved uptake rate constant (k(u)), dietary assimilation efficiency (AE), and efflux (k(e)) of cadmium (Cd) zinc (Zn) were quantified in a freshwater zooplankton Daphnia magna cultured at different ambient calcium (Ca) concentrations. animals first acclimated to Ca levels for 7 d from birth before the biokinetic measurements corresponding levels. With increasing level 0.5 200 mg/L, body content increased 0.91% (as tissue dry wt) 3.75%. k(u) Cd decreased by nine times; Zn it 2.6 AE 62...