Nano ‘tea bag’ purifies water

SciDev.Net: Scientists have reversed the action of the humble herbal tea bag to purify water on a small scale. Instead of infusing water with flavour, a sachet sucks up toxic contamination when fitted into the neck of a water bottle. The researchers, at Stellenbosch University, South Africa, hope communities that have no water-cleaning facilities will use it to purify dirty water. The sachets are made from the same material used to produce the rooibos tea bags that are popular in South ......

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