Application of Microwave Digestion-ICP in Analysis of Heavy Metals in MSWI Fly Ash

摘要

In this paper, different digestion methods for MSWI fly ash and the results are introduced. MSWI fly ash is digested respectively by mixed HNO3/HCl/HF, HNO3/HCl/HClO4, HNO3/HCl/H2O2, HNO3/HF, and HNO3/HF/HClO4,, and Cu, Cr, Ni, Mn, Pb, Zn, Cd and As are analyzed using ICP and Hg analyzed using Hg detector. It is found that digestion method using HNO3/HF/HClO4 is recommended for Cu, Cr, Ni, Zn and Pb, and HNO3/HCl/H2O2 recommended for Hg, Cd and As.