Constructed wetlands for waste water treatment: the use of laterite in the bed medium in phosphorus and heavy metal removal

  title={Constructed wetlands for waste water treatment: the use of laterite in the bed medium in phosphorus and heavy metal removal},
  author={Raymond B Wood and Colm McAtamney},
In Northern Ireland, phosphorus enrichment of lakes due to agriculture is a significant problem. Heavy metal exports from landfill sites, often located on water-logged land, are also of concern. Locally available laterite, a low grade bauxite which is rich in iron and aluminium, is used in acid solution with subsequent precipitation to remove phosphorus and heavy metals at several sewage treatment works. Constructed wetlands offer an attractive alternative to conventional waste water treatment… 
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