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Perchlorate is known to reduce absorption of iodine from the blood into the thyroid, where iodine is needed to make the thyroid hormone, T4.
We chose calcium perchlorate tetrahydrate for simulating Martian brine as it is a likely brine candidate due to its ubiquity on Mars, its hygroscopic properties and its low eutectic temperature (Hecht et al.
The influencing factors in the adsorption, kinetic and thermodynamic of perchlorate on GAC-CTAC were studied, to show the adsorption efficiency of GAC- CTAC and therefore to determine its potential applications.
The EPA decision to set a perchlorate standard came after monitoring data found more than 4 percent of public water systems have detected perchlorate and up to 17 million people may be drinking water containing the chemical.
In large doses, perchlorate can block the thyroid gland's uptake of iodine, which can lead to developmental delays in children.
The agency is also asking the NAS how it should consider the role of perchlorate relative to other iodide uptake inhibiting compounds and other public health strategies exist to address this aspect of thyroid health.
California, the National Academy of Sciences and Massachusetts have all used a 2002 study that tested the effects of perchlorate on humans.
The CDC's study, released today, found that perchlorate exposure is affecting thyroid hormone levels in American women, particularly those with lower iodide intake.
Government estimates of safe perchlorate concentrations in drinking water range from 1 ppb in Massachusetts to 6 ppb in California (1) to 24.
GAO investigators detected perchlorate in 35 states at 395 sites, over half of them in California and Texas.
Perchlorate occurs naturally and is a primary ingredient in solid rocket fuel.
Perchlorate has been detected in drinking water in 26 states and Puerto Rico, according to a study released by the American Water Works Association.