Effect of acid systems for determination of trace elements in coal combustion byproducts using microwave digestion method

被引：0

作者：

Zhu Z. ^{[1
]}

Zhuo Y. ^{[1
]}

机构：

[1] Key Laboratory for Thermal Science and Power Engineering of Ministry of Education, Tsinghua University, Beijing

来源：

Qinghua Daxue Xuebao/Journal of Tsinghua University | 2016年 / 56卷 / 10期

关键词：

Flue gas desulfurization (FGD) gypsum; Fly ash; Inductively coupled plasma mass spectrometry (ICP-MS); Microwave digestion; Trace element;

D O I：

10.16511/j.cnki.qhdxxb.2016.22.041

中图分类号：

学科分类号：

摘要：

Microwave digestion is the most common method for pretreating coal fly ash and flue gas desulfurization (FGD) gypsum before determination of the trace elements in the flow streams. This study analyzes previous microwave digestion methods. Then, the standard microwave digestion method 3052 from the US Environment Protection Agency is used to design three acid systems using HNO3, HNO3-HCl and HNO3-HF-H3BO3 for digesting certified reference gypsum material (FGD-2). After digestion, the As, Be, Cd, Co, Cr, Mn, Pb and Se contents are determined using inductively coupled plasma mass spectrometry (ICP-MS). The results show that HNO3-HF-H3BO3 gives the best digestion. The Cr, Mn and Se recoveries are 93.5%, 88.0% and 97.7%. Tests using a fly ash (GBW 08401) reference material also show good results with the As, Co, Cr, Mn, Pb and Se recoveries between 90.6% and 101.8%, but the Be and Cd recoveries are not good enough. This method can be used to determine the trace elements in coal fly ash and FGD gypsum by microwave digestion with HNO3-HF-H3BO3 followed by ICP-MS analysis. © 2016, Tsinghua University Press. All right reserved.

引用

页码：1072 / 1078

页数：6

共 25 条

[1]

National Bureau of Statistics of the People's Republic of China, China Statistical Yearbook, (2014)

[2]

Annual Report of Comprehensive Utilization of Resources in China, (2014)

[3]

Xu M.H., Yan R., Zheng C.G., Et al., Status of trace element emission in a coal combustion process: A review, Fuel Processing Technology, 85, 2, pp. 215-237, (2004)

[4]

Ratafia-Brown J.A., Overview of trace element partitioning in flames and furnaces of utility coal-fired boilers, Fuel Processing Technology, 39, 1, pp. 139-157, (1994)

[5]

Meij R., Te Winkel H., The emissions of heavy metals and persistent organic pollutants from modern coal-fired power stations, Atmospheric Environment, 41, 40, pp. 9262-9272, (2007)

[6]

Clark R.B., Ritchey K.D., Baligar V.C., Benefits and constraints for use of FGD products on agricultural land, Fuel, 80, 6, pp. 821-828, (2001)

[7]

Jankowski J., Ward C.R., French D., Et al., Mobility of trace elements from selected Australian fly ashes and its potential impact on aquatic ecosystems, Fuel, 85, 2, pp. 243-256, (2006)

[8]

Clark R.B., Ritchey K.D., Baligar V.C., Benefits and constraints for use of FGD products on agricultural land, Fuel, 80, 6, pp. 821-828, (2001)

[9]

Abu-Samra A., Morris J.S., Koirtyohann S.R., Wet ashing of some biological samples in a microwave oven, Analytical Chemistry, 47, 8, pp. 1475-1477, (1975)

[10]

Kingston H.M.S., Standardization of sample preparation for trace element determination through microwave-enhanced chemistry, Atomic Spectroscopy, 19, 2, pp. 27-30, (1998)

← 1 2 3 →