Arsenic emission during combustion of high arsenic coals from Southwestern Guizhou, China

Zhao, Yongchun; Zhang, Junying; Huang, Wei‐Yuan; Wang, Zonghua; Yang, Li; Song, Dangyu; Zhao, Fenghua; Chen, Zheng

doi:10.1016/j.enconman.2007.07.044

Cited by 96 publications

(43 citation statements)

References 38 publications

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“…Calcium compounds were usually used as sorbent for the control of trace elements release [16,17]. Zhao et al [18] found that through the addition of calcium based sorbent, arsenic was enriched in larger ash particles through the formation of calcium arsenates (As 5+ ). In our previous study, the capacity of calcium compounds for arsenic capture was further confirmed during municipal solid waste incineration [19].…”

Section: Introductionmentioning

confidence: 99%

Findings of proper temperatures for arsenic capture by CaO in the simulated flue gas with and without SO2

Chen

Zhang

et al. 2015

Chemical Engineering Journal

121

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Section: Introductionmentioning

confidence: 99%

Findings of proper temperatures for arsenic capture by CaO in the simulated flue gas with and without SO2

Chen

Zhang

et al. 2015

Chemical Engineering Journal

121

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“…Furthermore, higher combustion temperatures result in higher concentrations of particulate arsenic. For example, an increase in total arsenic concentration in PM 1 (particulate matter <1 µm) from 0.07 to 0.25 mg·m −3 at respective temperatures of 1100 and 1400 °C was reported in one study [48].…”

Section: Coal Combustionmentioning

confidence: 95%

“…During coal combustion, arsenic readily oxidizes to form arsenic oxide vapor [44] which combines with calcium oxide and condenses on the surface of fly ash particles in the form of calcium arsenate [46][47][48]. The inverse correlation between arsenic concentration and particle size which has been observed demonstrates that volatilized arsenic preferentially adsorbs or condenses on the finer particles [31].…”

Section: Coal Combustionmentioning

confidence: 98%

Health Effects Associated with Inhalation of Airborne Arsenic Arising from Mining Operations

et al. 2014

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Arsenic in dust and aerosol generated by mining, mineral processing and metallurgical extraction industries, is a serious threat to human populations throughout the world. Major sources of contamination include smelting operations, coal combustion, hard rock mining, as well as their associated waste products, including fly ash, mine wastes and tailings. The number of uncontained arsenic-rich mine waste sites throughout the world is of growing concern, as is the number of people at risk of exposure. Inhalation exposures to arsenic-bearing dusts and aerosol, in both occupational and environmental settings, have been definitively linked to increased systemic uptake, as well as carcinogenic and non-carcinogenic health outcomes. It is therefore becoming increasingly important to identify human populations and sensitive sub-populations at risk of exposure, and to better understand the modes of action for pulmonary arsenic toxicity and carcinogenesis. In this paper we explore the contribution of smelting, coal combustion, hard rock mining and their associated waste products to atmospheric arsenic. We also report on the current understanding of the health effects of inhaled arsenic, citing results from various toxicological, biomedical and epidemiological studies. This review is particularly aimed at OPEN ACCESSGeosciences 2014, 4 129 those researchers engaged in the distinct, but complementary areas of arsenic research within the multidisciplinary field of medical geology.Arsenic is the 20th most abundant element in the earth's crust and may be released into the atmosphere as a result of natural processes and anthropogenic activities [1]. Environmental arsenic is released via chemical and physical weathering processes, biological activity and volcanic emissions, while anthropogenic sources include mining, metal smelting and burning of coal. Annual global arsenic emissions are estimated to be 24,000 t [2], with around 60% originating from copper smelting and coal combustion alone [3]. In some urban and highly industrialized areas, less than 2% of the atmospheric arsenic inputs originate from natural sources [3].Emissions of arsenic-bearing particulate matter (PM) are of particular concern for human populations living in proximity to an emission source. Arsenic and inorganic arsenic compounds are classified as Group 1 carcinogens and are associated with cancers of the lung, bladder, kidney, skin, liver and prostate [2]. It should be noted that within the general population, inhalation is only considered a minor exposure pathway for inorganic arsenic compounds, and ingestion is considered the primary exposure pathway [2]. However, populations living in the vicinity of an arsenic emission source have an increased risk of additional exposure through inhalation of arsenic-contaminated particulates [4][5][6][7][8][9].Despite their substantial contribution to global atmospheric arsenic species, mining operations play an understudied role in the generation of contaminated dust and aerosols [10]. To identify some of the emerging ...

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“…Coal burning is the second main source of As emission. The world average As content in coals has been estimated in 9.0 ± 0.8 mg As kg -1 for bituminous coals [31], although some coals in China can contain up to several hundreds or thousands of mg As kg -1 [11,32].…”

Section: Origin Concentration and Legislation About As In The Airmentioning

confidence: 99%

Analytical approaches for arsenic determination in air: A critical review

Sánchez-Rodas

Campa

Alsioufi

2015

Analytica Chimica Acta

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This review describes the different steps involved in the determination of arsenic in air, considering the particulate matter (PM) and the gaseous phase. The review focuses on sampling, sample preparation and instrumental analytical techniques for both total arsenic determination and speciation analysis. The origin, concentration and legislation concerning arsenic in ambient air are also considered. The review intends to describe the procedures for sample collection of total suspended particles (TSP) or particles with a certain diameter expressed in microns (e.g. PM10 and PM2.5), or the collection of the gaseous phase containing gaseous arsenic species. Sample digestion of the collecting media for PM is

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Arsenic emission during combustion of high arsenic coals from Southwestern Guizhou, China

Cited by 96 publications

References 38 publications

Findings of proper temperatures for arsenic capture by CaO in the simulated flue gas with and without SO2

Findings of proper temperatures for arsenic capture by CaO in the simulated flue gas with and without SO2

Health Effects Associated with Inhalation of Airborne Arsenic Arising from Mining Operations

Analytical approaches for arsenic determination in air: A critical review

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