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Photo: Flickr, CC Researchers in Vietnam have recently completed tests on a new way to remove heavy metals from water. The secret? No, it's not some high tech materials... It's the good ol' sea shell.

The European Commission (EC) asked the European Food Safety Authority (EFSA) for scientific assistance regarding the possible impact on human health of exposure to ammonium released from water filter cartridges. This explains what ammonia is and how it can hurt people through exposure.

With 3.575 million people dying each year from water-related disease, our current water crisis is one of epic proportions. At any given time, half of the world's hospital beds are occupied by those suffering from illness brought on by limited access to safe drinking water, poor hygiene and sanitation. This is why these examples of devices used to purify drinking water are so critical to help the developing world.

Scientists use many different instruments to determine the quality of water, including Secchi disks (measure water clarity), probes, nets, gauges and meters. Water quality is not just measured by direct sampling. Information can also be derived from aerial and satellite photographs by observing the surrounding environment and by collecting organisms that live in the body of water.

Ammonium (NH₄+) is in the water and you need to separate them. heres how.