I still don't understand how recycling is related to the appearance of rare metals in toys and food packaging. This is more of a problem in the specific case of recycling. To prevent this from happening, you need to use proven recycling services (such as https://www.rubbishwaste.co.uk/). Unfortunately, not all waste removal and recycling companies perform their work efficiently. In any case, you need to approach the choice of the person with whom you cooperate more responsibly. All the best!