Manganese in Drinking Water: A Growing Concern for Communities Worldwide
- Published:
- Updated: December 16, 2024
Summary
Excessive manganese in drinking water poses health risks, impacting cognitive functions and central nervous system, with children particularly vulnerable.
- Sources of Contamination: Natural processes, industrial activities, and agricultural practices contribute to manganese entering water supplies.
- Global Impact: Manganese contamination is a global issue, affecting countries like Bangladesh, the United States, and Canada, highlighting the need for global awareness and action.
- Detection and Treatment: Scientific testing is required to detect manganese, with treatment options ranging from household filters to large-scale water treatment methods.
Manganese is an element that exists naturally everywhere: in the earth’s crust, our soils, even in our bodies. It’s a crucial mineral for the human body, which is involved in so many biological functions, from bone formation to wound healing. In the industrial world, manganese is a valuable part of steel making for strength and durability.
But for all its good functions, if manganese gets into our waterways in too much quantity, it can be very bad news. Not only is it so pervasive, but the invisible ways it seeps into our tap water are the problem. The reality is that manganese is ubiquitous and essential and, thus, it is so vexing.
Manganese and Health
Manganese is needed by the human body in small quantities for health reasons. But too much of this metal can poison us, especially with the use of drinking water. It can result in mental disability, memory loss and movement disorders comparable to Parkinson’s disease because of the mineral’s effects on the central nervous system.
These affect especially children, who have been found to be at risk from high manganese intake, including issues with learning and behaviour. Involvement with the body may show up in the form of fatigue, muscle weakness, and muscle aches. This risk of such severe health effects is what makes the manganese in our drinking water matter so much.
What are the Sources of Manganese in Drinking Water?
Manganese enters our water supplies in many different ways. Manganese can be leached into groundwater, our drinking water, by natural weathering of rocks and soils. Not only that, but manganese mining and industrial production releases it into waterways.
And there are some agricultural practices that contaminate manganese. Manganese-laden pesticides and fertilisers, for example, runoff to surface water and leaching into groundwater. This can mean manganese is a problem in urban or rural water supplies.
Manganese Contamination: Global Case Studies
Manganese contamination doesn’t happen just in one region or nation – it happens everywhere. Manganese has been found in tube wells in Bangladesh, for example, which already struggles with arsenic in its water. At the same time, problems have been identified with manganese-contaminated well water in parts of the United States and Canada.
Such are just a few examples of the ubiquity of manganese contamination. Case studies like these are what shows why this problem must be acknowledged and solved in the broader community.
Detection and Testing for Manganese in Water
There’s not a lot you can say by eye, nose or palate about manganese in water. Rather, scientific tests are needed. There are plenty of water testing kits out there for people who are concerned about their home water. These kits generally consist of taking a water sample and sending it to a laboratory.
More generally, water companies test water samples on a daily basis for many pollutants such as manganese. Such tests are necessary for evaluating water quality and making it safe for health and safety purposes. But in places where there is no good water testing and treatment facilities, manganese contamination can pass without detection and treatment.
Regulations and Guidelines on Manganese Levels in Water
In the world, there are various recommendations for manganese drinking water safe ranges. For example, the World Health Organization established a guideline value for manganese concentration at which no major health risk over a lifetime’s consumption is presented.
Yet, for all these global rules, how these norms are actually implemented and complied with varies widely from one country to the next. These recommendations don’t always happen in places where the infrastructure or resources to track and manage manganese levels are not available. Such a disparity makes it imperative not only to develop but also to apply and enforce water quality standards.
What are the Treatment Options for Manganese in Water?
Fortunately, there are many solutions for manganese-contaminated water. Activated carbon filters, water softeners and reverse osmosis systems are options for single family homes. These techniques all work to diminish or completely eliminate manganese in different ways:
Activated carbon filters trap contaminants at the top of the carbon particles.
Manganese and other minerals such as calcium and magnesium are extracted from water with an ion exchange process used by water softeners.
Reverse osmosis systems push water through a semi-permeable membrane that could purify contaminants such as manganese.
At a grander scale, there are various ways that water treatment plants can act. These can include oxidation filtration (siphoning the water of an oxidant that dissolves manganese into something soluble in a filter). Sequestration, in which the water is infused with a chemical that adheres to the manganese, so it doesn’t rust or otherwise bother you, is another option.
Advocacy and Future Directions
Where do we now go from here? First and foremost, education about the manganese problem in water is very important. This can be accomplished by educated people and public discussion of the matter, as well as lobbying for safe water in local areas.
Furthermore, there is more scientific work to be done to learn more about the health effects of manganese, how best to detect and treat it. But there is a place for policymakers, too. They can help set, implement and enforce limits for manganese in water.
Third is investment in water infrastructure. Not only the physical infrastructure to filter and serve safe water, but also monitoring and water quality monitoring systems. We can do this together, and make sure that every person in every corner of the world gets clean, safe water – no too much manganese or other contaminants.
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