Subspeciation of sulfidic nickel in particulates.: Determination of Ni3S2, NiS2 and NiS in reference and fly ash samples by carbon paste electrode voltammetry

被引：4

作者：

Wong, JL ^{[1
]}

Liu, AH ^{[1
]}

Tian, M ^{[1
]}

Jin, WR ^{[1
]}

机构：

[1] Univ Louisville, Dept Chem, Louisville, KY 40292 USA

来源：

FRESENIUS JOURNAL OF ANALYTICAL CHEMISTRY | 1999年 / 363卷 / 5-6期

关键词：

Sequential Extraction; Petroleum Coke; Sulfidic Nickel; Linear Dose; NiS2;

D O I：

10.1007/s002160051249

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

Nickel speciation of fly ash by sequential extraction lacks specific identification of the chemical forms in the sulfidic nickel phase. A new voltammetric analysis of Ni3S2, NiS, and NISI in a carbon paste electrode is reported. Characteristic peaks were observed in acetate (pH 5) as the electrolyte; the anodic peak for Ni3S2 gave a linear dose response with microgram sensitivity. Reference compounds included heazlewoodite, millerite, commercial Ni3S2, NiS2, and NiS, but the latter was shown to be: mainly the subsulfide. No Ni3S2 was found in two types of laboratory generated ash: an oil ash containing mainly soluble nickel and a high sulfur petroleum coke ash enriched with nickel.

引用

页码：571 / 572

页数：2