Electrokinetic remediation of heavy metals from municipal solid waste incineration fly ash pretreated by nitric acid.

ABSTRACT: Municipal solid waste incineration (MSWI) fly ash has a high concentration of heavy metals (HMs) which are hazardous to the environment. Moreover, it has high pH and buffering capacity which hinders the removal of HMs. Another constraining factor is the considerable fraction of HMs which exist in oxidizable and reducible states. The acid pretreatment of MSWI fly ash is a key solution to this problem. Therefore, the current experiment is carried out to evaluate the effect of acid pretreatment of MSWI fly ash and reaction/proposed time on the removal efficiency of HMs through an electrokinetic experiment. The leaching experiment results show that acid pretreatment has increased the desorption/release of heavy metal ions (Pb²⁺, Cd²⁺, Cu²⁺ and Zn²⁺).

SUBMITTER: Li H 

PROVIDER: S-EPMC6124067 | biostudies-literature | 2018 Aug

REPOSITORIES: biostudies-literature