In terms of carcinogenic potential, pyridine, lead, benzene, toluene, bis 2-ethylhexy phthalate, and 1,2,4-trimethylbis 2-ethylhexy phthalatee flowband and produced water are identified as major contributors, but the overall mass of these constituents in flowback and produced water is very low.
A controversial loophole introduced under George W Bush's administration means that companies need not disclose what chemicals they are using, and evidence of harmful substances including lead and benzene has been found.
In the last decades, increasing concern has been raised by urban air pollution; lead and benzene, two gasoline components released by motor vehicle exhausts, are known to be toxic to humans.
"These are all wastes that have been shown to be harmful to health directly," he said, referring to the most dangerous compounds, including lead and benzene.
Environmental tobacco smoke contains more than 4,000 chemicals, of which 69 are known carcinogens such as formaldehyde, lead, arsenic, benzene, and radioactive polonium-210.
Pellizzari et al. (1999) used air pollutant data from the National Human Exposure Assessment Survey NHEXASS) to determine that minorities had higher personal measurements for lead and benzene than did nonminorities, but the authors cautioned that their sample size for minorities was small.
In the context of occupational medicine, techniques to measure the uptake of chemical substances directly in human body fluids were developed in the early 20th century; measurements of lead and benzene metabolites were conducted by industry in the 1930s [ 8].
In addition to air pollution linked to smog and asthma, other pollutants are released into the air that may affect the health of children and adults and the environment, including lead, mercury, benzene and nickel.
Stay away from materials such as arsenic, lead, formaldehyde, benzene, and ethylene oxide, as these may harm your baby.
These and a multitude of other effects including AhR dysregulation, reduced immunosurveillance, and oxidative stress probably lead to benzene-induced hematologic malignancies (McHale et al. 2012).
Table 3 also shows the overall measure of metal compounds (arsenic, cadmium, chromium, mercury, manganese, nickel, and lead), aromatic solvents (benzene, ethyl benzene, styrene, toluene, and xylenes), and chlorinated solvents (methylene chloride, trichloroethane, perchloroethylene, and vinyl chloride), none of which were statistically significant in either analysis.
