NICKEL SPECIATION OF URBAN PARTICULATE MATTER

Galbreath, Kevin C. ; Crocker, Charlene R. ; Nyberg, Carolyn M. ; Huggins, Frank E. ; Huffman, Gerald P.

University of North Dakota

关键词: Particulates;    X-Ray Spectroscopy;    Nickel Compounds;    X-Ray Diffraction;    Absorption Spectroscopy;   

DOI  :  10.2172/823014
RP-ID  :  NONE
RP-ID  :  FC26-98FT40321
RP-ID  :  823014

美国|英语

来源: UNT Digital Library

【 摘 要 】

A four-step sequential Ni extraction method, summarized in Table AB-1, was evaluated for identifying and quantifying the Ni species occurring in urban total suspended particulate (TSP) matter and fine particulate matter (<10 {micro}m [PM{sub 10}] and <2.5 {micro}m [PM{sub 2.5}] in aerodynamic diameter). The extraction method was originally developed for quantifying soluble, sulfidic, elemental, and oxidic forms of Ni that may occur in industrial atmospheres. X-ray diffraction (XRD) and x-ray absorption fine structure (XAFS) spectroscopy were used to evaluate the Ni species selectivity of the extraction method. Uncertainties in the chemical speciation of Ni in urban PM{sub 10} and PM{sub 2.5} greatly affect inhalation health risk estimates, primarily because of the large variability in acute, chronic, and cancer-causing effects for different Ni compounds.