Environmental Science
8 years ago

Toxic Heavy Metals in Sewage Sludge Threaten Crop Safety and Soil Health

Application of Sewage Sludge on an Acid Tropical Soil: Crop Response and Heavy Metals Uptake by Maize and Their Accumulation in The Soil
Rosazlin Abdullah

Paper Summary

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Sewage sludge can be used to improve soil for growing crops, but it may contain harmful heavy metals. A study in Malaysia looked at different types of sewage sludge and found that one type had high levels of heavy metals like zinc and copper, making it unsuitable for agriculture. This shows that not all sewage sludge is safe for use on farmland.