STUDY ON LEACHING EXPERIMENT OF HAZARDOUS TRACE ELEMENTS IN COAL-FIRED RESIDUES:REVIEW

The author reviewed the mineralogy,element geochemistry and micropetrology of coal-derived ash and leaching experiment of hazardous elements in coal-derived ash.The type,efficiency and condition choice of leaching experiment as well as the factors controlling the leaching behavior of hazardous trace elements are discussed.Finally,the kinds of hazardous trace elements which are concemed in current leaching experiments are given.