Ecotoxicological studies of micro- and nanosized barium titanate on aquatic photosynthetic microorganisms

Polonini, Hudson; Brandão, Humberto M.; Raposo, Nádia Rezende Barbosa; Mouton, Ludovic; Yéprémian, Claude; Couté, Alain; Brayner, Roberta

doi:10.1016/j.aquatox.2014.05.005

Cited by 21 publications

(17 citation statements)

References 41 publications

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“…Ba is used at the front glass of CRTs (panel). Studies have shown that its short‐term exposure is also harmful . Another health hazard may arise from the phosphor coatings of the panel glass.…”

Section: Introductionmentioning

confidence: 99%

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Heavy metals inhalation exposure analysis from particulate matter emitted from dry and wet recycling processes of waste electrical and electronic equipment

Lasithiotakis

Psanis

Triantafyllou

et al. 2019

Env Prog and Sustain Energy

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Waste electrical and electronic equipment (WEEE) recycling processes produce aerosols that influence occupational health. This work is a characterization of aerosols and dust from dry and wet WEEE recycling processes in a small plant. A particle spectrometer measured size distributions of ultrafine particles whereas a deposition impactor collected aerosols for chemical analysis. Powders from milled printed circuit boards and from the cathode ray tube (CRT) processing line were additionally analyzed. Morphological characterization of the dusts by optical and electron microscopy also took place. All plant compartments are subject to aerosol concentrations during the work hours with highest concentration at 105 particles/cm3. The wet recycling technique was more efficient in retaining powders in the solid form than the dry technique. An exposure calculation and a risk assessment of an average worker were carried out. By the worst case scenario the total daily inorganic elements are 80.5 μg, mainly consisting of aluminium copper and iron. The exposure calculation and the risk assessment revealed that accumulation of aerosols in other compartments has a higher impact than the dry process itself. Results showed that for both methods pollutants concentrations were low, even in the worst‐case scenario examined.

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Section: Introductionmentioning

confidence: 99%

“…Studies have shown that its short-term exposure is also harmful. 14 Another health hazard may arise from the phosphor coatings of the panel glass. They term "phosphor" is actually improper as they do not contain phosphorus.…”

Section: Introductionmentioning

confidence: 99%

Heavy metals inhalation exposure analysis from particulate matter emitted from dry and wet recycling processes of waste electrical and electronic equipment

Lasithiotakis

Psanis

Triantafyllou

et al. 2019

Env Prog and Sustain Energy

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“…Studies reported that high levels of strontium (Sr) and barium (Ba) concentrations could be toxic for marine embryos (abnormal shell calcification and embryo morphology) [21], benthic biota [22], and photosynthetic microorganisms [23]. For instance, Spangenbery and Cherr [21] showed that adverse effects on mussel embryos occurred when Ba concentration was between 200 and 900 µg/L.…”

Section: Introductionmentioning

confidence: 99%

Spatiotemporal Distributions of Sr and Ba along an Estuarine River with a Large Salinity Gradient to the Gulf of Mexico

2016

Water

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Strontium and barium to calcium ratios are often used as proxies for tracking animal movement across salinity gradients. Many estuarine rivers face saltwater intrusion due to sea level rise, potentially causing changes in mobility and distribution of these metals upstream. From May 2013 to August 2015, monthly water samples were collected and in-situ measurements were performed at six sites along an estuary strongly affected by saltwater intrusion, the Calcasieu River, with salinity ranging from 0.02 to 29.50 Parts Per Thousand (ppt). Results showed that the total Sr concentration and the Sr/Ca ratio both increased significantly with increasing salinity. The average Sr concentration at the site closest to the Gulf of Mexico (Site 6) was 46.21 µmol/L, about 130 times higher than that of the site furthest upstream (Site 1, 0.35). The average Sr/Ca ratio at Site 6 (8.41 mmol/mol) was about three times the average Sr/Ca ratio at Site 1 (2.89). However, the spatial variation in total Ba concentration was marginal, varying from 0.36 to 0.47 µmol/L. The average Ba/Ca ratio at Site 1 (4.82 mmol/mol) was about 54 times the ratio at Site 6 (0.09), showing a negative relation between the Ba/Ca ratio and salinity. All elemental concentrations and ratios had considerable seasonal variations, with significant differences among sampling months for the Sr and Ba concentrations and the Ba/Ca ratio (p < 0.01). The results suggest that for low-gradient estuarine rivers such as the Calcasieu River, water chemistry upstream would experience substantial Sr and Ca enrichment, potentially affecting aquatic environments and biological communities.

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“…Nanosized barium titanate (BT), in turn, has been recently gaining application in biomedicine, as a biological nanocarrier for proteins (Ciofani et al 2010a), an uptake enhancer of low-molecular-weight drugs such as doxorubicin (Ciofani et al 2010b), a biomarker for imaging probes (Hsieh et al 2010), and as bone graft material (Ball et al 2014). Polonini et al (2014) performed ecotoxicological tests on three aquatic microorganisms: C. vulgaris, A. flos-aquae, and E. gracilis. Two materials (micro-and nanosized) were used.…”

Section: Barium Titanate (Batio 3 )mentioning

confidence: 99%

Nanotechnologies in Food and Agriculture

Rai¹,

Ribeiro²,

Mattoso³

et al. 2015

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Ecotoxicological studies of micro- and nanosized barium titanate on aquatic photosynthetic microorganisms

Cited by 21 publications

References 41 publications

Heavy metals inhalation exposure analysis from particulate matter emitted from dry and wet recycling processes of waste electrical and electronic equipment

Heavy metals inhalation exposure analysis from particulate matter emitted from dry and wet recycling processes of waste electrical and electronic equipment

Spatiotemporal Distributions of Sr and Ba along an Estuarine River with a Large Salinity Gradient to the Gulf of Mexico

Nanotechnologies in Food and Agriculture

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