Efficient and fast arsenate removal from water by in-situ formed magnesium hydroxide.

ABSTRACT: MgO nanoparticles have good As-adsorption capacity in treating As-contaminated wastewater but suffer from high production cost. In this study, instead of using pre-formed MgO nanoparticles, we found that in-situ formed Mg(OH)₂ from MgCl₂ and NaOH reaction exhibited super high arsenate (As(V)) removal efficiency. Only 1.5 mmol/L of in-situ formed Mg(OH)₂ could remove more than 95% As(V) within 10 min to make the As contaminated water (10 mg-As(V)/L) meet the municipal wastewater treatment standard, whereas MgO nanoparticles failed. The Mg-As sludge has an amorphous crystal structure while no Mg(OH)₂ phase could be observed. As(V) existed uniformly within the sludge which was confirmed by elemental mapping. A precipitation-adsorption-coagulation me

SUBMITTER: Zhou J 

PROVIDER: S-EPMC11390963 | biostudies-literature | 2024 Sep

REPOSITORIES: biostudies-literature