The Unseen Dangers of Aluminum in Drinking Water
- Published:
- Updated: December 16, 2024
Summary
Aluminum, prevalent in various industries, poses unseen dangers in drinking water, linked to health risks like neurotoxicity and diseases. Commonly used in products and water treatment, aluminum enters water through industrial waste and natural sources, necessitating awareness and regulation.
- Common Uses: From soda cans to water treatment, aluminum is versatile but pervasive.
- Sources of Contamination: Industrial waste, water treatment, acidic rain, and household items introduce aluminum into water sources.
- Health Implications: High levels of aluminum can affect the nervous system and bone health, sparking debate over long-term exposure effects.
Aluminum is an ubiquitous metal that has been used for industry and products since time immemorial, such as water purification. Yet the invisible health risks of aluminium in tap water have troubled scientists and doctors. Though it is a common product, too much aluminium in water has been associated with harmful health effects, such as neurotoxicity and increased risk of certain diseases.
What are the common uses of aluminum?
Aluminium is the third-most abundant element in the Earth’s crust, and it is now central to our modern world through its diverse uses. The aluminum in the can of soda in your fridge to the foil in your kitchen, and perhaps the plane you’ll hop on when you head out on vacation: its adaptability is undeniable. But because it is so ubiquitous, it is constantly acclimatising us to it, including in water.
One less utilized area of aluminum is in water treatment. In water treatment facilities, aluminium sulfate, or alum, is often used as a coagulant to draw out particles and bacteria from the water. This step is necessary to make drinking water crystal clear, but it can leave us with aluminum residue in our water.
How Aluminum Gets into Our Drinking Water
And the aluminum gets in our water in various ways. And of course, it escapes into groundwater from metal-laden rocks and soil. But it’s usually human activities that have been the greater driver. Mining, manufacturing and the alum water treatment mentioned above are industrial effluents that introduce aluminum into the water.
Acid rain can also accelerate the absorption of aluminum from soil into water. If you cook with aluminum cookware or aluminum foil, this could also lead to ingestion through food and drink. These all point to the awareness and taking action to reduce aluminum exposure.
Understanding the Standards for Aluminum in Drinking Water
Some health and environmental authorities around the world have introduced rules for the levels of aluminium in water. The WHO, for example, recommends 0.2 mg/L of aluminium in water for aesthetic and practical reasons (a lot of aluminium can make water look and taste bad).
But those definitions can differ from country to country and organisation to organisation, and are in some cases the subject of ongoing research and discussion, just like the problem itself.
Health Implications of Aluminum Exposure
High aluminum consumption was linked to various health problems. While aluminum is not extremely toxic to humans, it could cause harm to the human body if exposed for long enough.
Particularly prone are the nervous system, some researchers even linking aluminum to neurodegenerative disorders like Alzheimer’s disease (the link is controversial). Other health effects can be bone disease – high levels of aluminium inhibit human body’s absorption of phosphates – and anaemia, as aluminium can interfere with iron metabolism.
The Controversy and Debate Surrounding Aluminum
Even so, there is much dispute over the toxicology of aluminum in drinking water. According to some scientists, the body is pretty good at excreting small amounts of aluminum we ingest, so there’s no real health danger here.
Other people worry that over time, consistent low-level exposure could lead to toxic accumulation in the body – especially in those with compromised kidneys, because kidneys remove aluminium from our body. The science doesn’t agree, and these polarisations further justify the need for more research and monitoring of levels of aluminum in our water supply.
Methods of Removing Aluminum from Drinking Water
Fortunately, there are a number of ways to help cut back on the aluminium in water. Here are a few options:
Reverse osmosis: A semi-permeable membrane is used to remove impurities such as aluminium. But it’s very energy intensive and can waste water.
Distillation: Boiling water then capturing the vapour leaving behind the pollutants. It works but is energy consuming and slow.
Aluminium filters : There are filters that can remove aluminum, such as activated carbon or ceramic filters. It is variable from product to product and needs regular servicing to work at its best.
All of these approaches have pros and cons, and the right choice will vary depending on needs, resources, and the quality of the water supply.
Best Practices for Reducing Aluminum Exposure
In order to be even less exposed to aluminum, a few guidelines can be applied in everyday life:
Reducing use of aluminum cookware and foil: The amount of aluminum that gets into food from cookware and foil is relatively small, but it will go up with acidic or salty foods.
Make sure you use aluminium-free personal care products: There is plenty of aluminum in deodorant and antiperspirant. Choose non-alluminium options whenever possible.
Look for ingredients: Some prescription medications (antacids, in particular) can have aluminum in them. Check label and think different.
These are some solutions, but keep in mind that food and water is where the vast majority of your exposure to aluminum occurs, so having clean water is still essential.
The Future of Aluminum in Our Water Supply
Just as our knowledge of aluminum and its potential health effects on humans will change, so will our way of treating it. In the future, that could include greater regulation of aluminum concentrations in drinking water, continued advancements in aluminum-removing technology, and public education about the problem.
A place for growth would be more effective and cheap water filtration systems. If people are increasingly interested in sustainability and health, they will demand these kinds of technologies more. Public awareness will also be key because, with more people being conscious, consumers will want safer products and cleaner water and it will drive innovation and policy changes.
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