Formation mechanism of carbide slag composite sustained-alkalinity-release particles for the source control of acid mine drainage.

ABSTRACT: Acid mine drainage (AMD) has caused serious and long-lasting damage to the environment in many countries. Preventing AMD formation at the source is considered the most direct and effective method of remediation. Carbide slag, an industrial waste, is a potential AMD treatment material due to its strong alkalinity. However, applying carbide slag at the source carries difficulties due to its rapid release of alkalinity. This is the first attempt to mix carbide slag with bentonite to prepare sustained-alkalinity-release particles for source control of AMD. The size of Ca(OH)₂ crystallites is decreased from 267 to 211 nm, and the reduced part forms calcium silicate hydrate gel (C-S-H) between the carbide slag and bentonite. C-S-H encapsulated on the surface of the carbide slag, incre

SUBMITTER: Bai J 

PROVIDER: S-EPMC8664932 | biostudies-literature | 2021 Dec

REPOSITORIES: biostudies-literature