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الوسم: Toxicity

  • Secondhand Smoke Can Introduce Cancer-Causing Metals, Study Shows

    Secondhand Smoke Can Introduce Cancer-Causing Metals, Study Shows

    Breathing in secondhand smoke can significantly raise levels of cadmium in your body, even if you don’t smoke yourself. A recent study has shown that adults exposed to secondhand cigarette smoke have approximately 1.5 times more cadmium in their bloodstream compared to those living in smoke-free environments.

    Smokers who actively light up have even higher cadmium levels, with over three times the amount found in nonsmokers’ blood. Cadmium is a naturally occurring metal, but it becomes harmful when it accumulates in the body. Elevated levels are associated with increased risks of kidney, lung, and prostate cancers. It can also lead to kidney failure, fragile bones, and chronic breathing issues like bronchitis and asthma.

    Despite declines in smoking rates in many countries, exposure to tobacco smoke remains a significant public health concern. These findings imply that even those who do not smoke may be at risk of harmful cadmium buildup if they regularly breathe in secondhand smoke.

    The study analyzed data collected from 2015 to 2020, including blood and urine samples from over 5,000 individuals—1,380 children and teens, along with 3,686 adults. Researchers also measured cotinine, a marker used to detect recent tobacco exposure, which helped categorize participants based on whether they were non-exposed, exposed to secondhand smoke, or active smokers.

    Blood tests reveal recent cadmium exposure, while urine samples can show accumulated levels over time, as cadmium can remain in the kidneys for up to 30 years. Interestingly, the research found that exposure to secondhand smoke did not significantly affect cadmium levels in children and teenagers. This may be because cadmium builds up gradually, and younger people simply haven’t accumulated as much yet.

    The study also showed women tend to have higher cadmium levels than men, partly due to biological factors. Women’s digestive systems absorb cadmium more efficiently, especially during hormonal phases like menstruation, pregnancy, and menopause. Social factors also play a role: individuals with lower incomes, less education, or belonging to racial minority groups typically exhibit higher cadmium levels, likely due to broader social and environmental inequalities. Living in crowded housing, exposure to polluted soil, traffic emissions, and contaminated foods might contribute to this disparity.

    The researchers clarify that their study cannot establish a direct cause-and-effect relationship, as it measured exposure at a single point in time. They recommend longer-term research to better understand the dynamics.

    Nonetheless, the takeaway is clear: avoiding tobacco smoke isn’t just about protecting your lungs—it’s also crucial for reducing the silent buildup of toxic metals like cadmium in the body, which can have serious health consequences over the years.

  • Innovative ‘Nano Cage’ Removes PFAS Permanently from Drinking Water

    Innovative ‘Nano Cage’ Removes PFAS Permanently from Drinking Water

    Credit: Unsplash+.

    Toxic chemicals called PFAS have become a growing concern worldwide. Often referred to as “forever chemicals,” they resist breaking down in the environment, remaining intact for many years.

    Over time, PFAS can accumulate in water sources, soil, and even in humans. Researchers have detected these chemicals in rivers, groundwater, and drinking water supplies, raising significant health concerns over long-term exposure.

    PFAS are commonly used in numerous industries and consumer products. They are found in non-stick cookware, waterproof clothing, food packaging, and firefighting foam.

    Due to their durability, PFAS can travel long distances through water and persist for decades, making removal extremely challenging once they enter the environment.

    A major hurdle in addressing PFAS pollution is that different types react differently. For example, short-chain PFAS are smaller and more mobile, enabling them to move more freely through water systems and making it harder to remove with current treatment technologies.

    Research from Flinders University suggests an innovative approach to this issue. Published in *Angewandte Chemie International Edition*, the study introduces a new material designed to effectively trap these elusive chemicals.

    The team, led by Dr. Witold Bloch, developed a specialized material known as an adsorbent, which captures specific substances through attraction, similar to a sponge soaking up water. This new adsorbent surpasses traditional options in efficiency.

    At its core is a tiny nanoscale structure called a molecular cage. This cage is engineered to trap PFAS molecules within it. Unlike previous methods that only target surface binding, this approach draws PFAS molecules into the cage and holds them tightly, preventing their escape.

    The researchers found that this cage promotes the clustering of PFAS molecules, simplifying the trapping process. This is a notable improvement over older techniques, especially in capturing smaller PFAS variants.

    To make the technology viable, these cages were embedded into mesoporous silica, a material that alone does not effectively capture PFAS. Combined with the molecular cages, however, it becomes highly capable of removing a broad spectrum of PFAS from water.

    Laboratory testing yielded promising results, with the new material removing up to 98% of PFAS from simulated drinking water samples. Such performance indicates potential for application in actual water treatment facilities.

    An additional benefit is the material’s reusability. The researchers demonstrated it maintained high effectiveness after multiple cleaning cycles, which could significantly lower treatment costs and enhance practicality for large-scale deployment.

    The study also deepens understanding of how PFAS molecules bind at the molecular level. By analyzing these interactions within the cages, the scientists could refine the design for greater efficiency.

    However, these findings are preliminary. The experiments were conducted under controlled lab conditions, and further testing is needed to verify performance in real-world water treatment settings.

    This research marks an important advance in combating PFAS pollution, offering a novel method to address one of water treatment’s most persistent challenges. With continued development and validation, this technology could become a crucial tool in ensuring safer drinking water in the future.

    If health is a concern, consider reading about studies suggesting that a low-carb diet may increase overall cancer risk, or about berries that could help prevent cancer, diabetes, and obesity. Additionally, explore recent research on how drinking milk impacts heart disease and cancer risks, or how vitamin D supplements might significantly reduce cancer mortality.