Global marine plastic pollution, which is derived mainly from the input of vast amounts land-based waste, has drawn increasing public attention. Riverine outflows estimated using models based on concept mismanaged waste (MPW) are substantially greater than reported field measurements. Herein, we formulate a robust model Human Development Index (HDI) as main predictor, and modeled riverine calibrated validated by available data. A strong correlation achieved between estimates measurements,...

Plastic pollution has caused increasing global concern. Currently, model estimates of the riverine plastic inputs to oceans based on concept Mismanaged Waste (MPW) varied substantially, and no field measurements were available. We conducted sampling at eight major river outlets Pearl River Delta, South China with rapid economic growth urbanization provide measured data for fine-tuning modeling results. Floating microplastics (MPs) collected a Manta net (mesh size 0.33 mm) five times during...

N-(1,3-Dimethylbutyl)-N′-phenyl-p-phenylenediamine (6PPD) and its quinone derivative, 6PPD-quinone (6PPD-Q), have been found to be prevalent in the environment, but there are currently no data on their presence humans. Herein, we conducted first human biomonitoring study of 6PPD 6PPD-Q by measuring 150 urine samples collected from three different populations (general adults, children, pregnant women) South China. Both were detected samples, with detection frequencies between 60% 100%....

p-Phenylenediamines (PPDs) are widely used as antioxidants in tire rubber, and their derived quinone transformation products (PPD-Qs) may pose a threat to marine ecosystems. A compelling example is N-(1,3-dimethylbutyl)-N′-phenyl-p-phenylenediamine (6PPD)-derived quinone, called 6PPD-Q, the causal toxicant for stormwater-linked acute mortality toward coho salmon. However, knowledge of co-occurrences PPDs PPD-Qs transport from freshwater oceanic waterbodies on large geographical scale remains...

Tap water nano/microplastics (NMPs) escaping from centralized treatment systems are of increasing global concern, because they pose potential health risk to humans via consumption. Drinking boiled water, an ancient tradition in some Asian countries, is supposedly beneficial for human health, as boiling can remove chemicals and most biological substances. However, it remains unclear whether effective removing NMPs tap water. Herein we present evidence that polystyrene, polyethylene,...

After the phase-out of polybrominated diphenyl ethers (PBDEs), use alternative flame retardants (AFRs), such as FireMaster 550, and organophosphate esters (OPEs) has increased. However, little is known about human exposure to these chemicals. This lack biomonitoring studies partially due absence reliable noninvasive biomarkers exposure. Human hair nails can provide integrated measurements, such, matrices potentially be used retardants. Paired hair, fingernail, toenail, serum samples obtained...

Sources, compositions, and historical records of polycyclic aromatic hydrocarbons (PAHs) in sediment cores collected from the Yellow Sea South China were analyzed to investigate influence anthropogenic activities. The occurrence PAHs was mainly derived various combustion sources, especially biomass domestic coal. Uniform composition sedimentary (52-62% phenanthrene, benzo[b]fluoranthene, indeno[1,2,3-cd]pyrene, benzo[g,h,i]perylene) suggested air-borne mixtures intractable degradation....

Our previous work demonstrated that massive emissions of hindered phenol antioxidants and sulfur-containing from e-waste recycling; however, it remains unclear whether recycling also results in the emission substantial quantities amine (AAs) organophosphite (OPAs), another two major classes under-researched antioxidants. In this study, we continued to screen previously studied dusts for a broad range 21 AAs, p-phenylenediamine-derived quinones, 15 OPAs. All AAs 12 out OPAs were detected...

Synthetic phenolic antioxidants (SPAs) are a group of ubiquitous contaminants with multiple toxicities. However, current knowledge on the occurrence SPAs in baby food and associated infant exposure is lacking. Herein, we analyzed three categories from China: formula, cereal, puree, for broad suite 11 traditional 19 novel SPAs. In addition to SPAs, up 13 were detected samples. The median concentrations puree 604, 218, 24.1 ng/g, respectively, surpassing those (53.4, 62.1, 10.0 ng/g)....

In this study, eight common and two unusual synthetic phenolic antioxidants (SPAs), as well four transformation products (TPs), were comprehensively analyzed in 80 human breast milk samples collected from lactating women South China. All 10 SPAs 4 TPs detected the samples. 2,4-Di-tert-butylphenol (DBP) was at high concentrations (mean of 16.9 ng/mL), followed by 2,6-di-tert-butyl-hydroxytoluene (BHT) 1.52 ng/mL). DBP BHT collectively contributed to 91.9% mean ∑SPAs (sum all SPAs). The lipid...

Global rivers act as a dominant transport pathway for land-based plastic debris to the marine environment. Organic pollutants (OPs) affiliated with riverine plastics can also enter global oceans, but their amounts remain unknown. Microplastic (MP) samples were collected in one-year sampling event from surface water of eight main outlets Pearl River Delta (PRD), China, and analyzed OPs MPs, including 16 polycyclic aromatic hydrocarbons (PAHs), polybrominated diphenyl ethers (PBDEs), 14...