Which toxic element is often found in pottery glazes?

Cadmium is often found in pottery glazes due to its vibrant color properties and ability to produce rich hues, particularly in reds and yellows. However, cadmium is recognized as a toxic heavy metal that can pose significant health risks if ingested or inhaled, especially considering that pottery can be used for food and beverage service. The presence of cadmium in glaze can leach into food, particularly acidic foods, which can lead to cadmium exposure and associated health hazards such as kidney damage and potential carcinogenic effects. Awareness of such toxicity is crucial for those involved in food management, as it impacts food safety practices and regulations surrounding food service equipment.

Iron, copper, and zinc are also elements that can be used in pottery glazes, but they are generally considered less hazardous compared to cadmium. Iron might contribute to color but is not toxic in the same way, while copper and zinc have varying toxicity levels that do not compare to the significant concerns associated with cadmium. This is why cadmium is specifically noted as a toxic element of concern when it comes to pottery glazes.