Comparison of Digestion Methods for Analysis of Heavy Metals in MSWI Bottom Ash

Abstract:

This work aims to develop a proper digestion method for measurement of heavy metal content in municipal solid waste incineration (MSWI) bottom. Different digestion methods by HNO₃, HNO₃/HCl, HNO₃/HCl/HClO₄, HNO₃/HCl/H₂O₂, HNO₃/HClO₄, HNO₃/H₂O₂, were compared in digestion efficiency, and Cu, Pb, Zn and Cd were analyzed using atomic absorption spectrum (AAS). The method using mixed HNO₃/HCl/HClO₄ was recommended for digestion of MSWI slag for measurement of Cu, Pb, Zn, and the method of HNO₃/H₂O₂ recommended for digestion for measurement of Cd.

• Periodical: Key Engineering Materials (Volumes 474-476)
• Pages: 1075-1080
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.474-476.1075
• Online since: April 2011
• Authors: Hai Ying Zhang, Yi Zheng, Hong Tao Hu, Jing Yu Qi
• Keywords: Digestion Method, Heavy Metal, ICP, Microwave Digestion, MSWI Bottom Ash

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