干旱区生态环境知识资源中心(Arid): The potential wildfire effects on mercury remobilization from topsoils and biomass in a smelter-polluted semi-arid area

Arid

DOI	10.1016/j.chemosphere.2020.125972
	The potential wildfire effects on mercury remobilization from topsoils and biomass in a smelter-polluted semi-arid area
	Tuhy, Marek 1; Rohovec, Jan 2; Matouskova, Sarka 2; Mihaljevic, Martin 1; Kribek, Bohdan 3; Vanek, Ales 4; Mapani, Ben 5; Goettlicher, Joerg 6; Steininger, Ralph 6; Majzlan, Juraj 7; Ettler, Vojtech 1
通讯作者	Tuhy, Marek ; Ettler, Vojtech
来源期刊	CHEMOSPHERE
ISSN	0045-6535
EISSN	1879-1298
出版年	2020
卷号	247
英文摘要	Wildfires can be responsible for significant mercury (Hg) emissions especially in contaminated areas. Here, we investigated the Hg distribution in topsoils and vegetation samples and temperature-dependent Hg mobilization from biomass-rich topsoils collected near a copper (Cu) smelter in Tsumeb (semi-arid Namibia), where Hg-rich Cu concentrates are processed. The thermo-desorption (TD) experiments conducted on representative biomass-rich topsoils (3.9-7.7 mg Hg/kg) indicated that more than 91% of the Hg was released at similar to 340 degrees C, which corresponds to the predominant grassland-fire conditions. The mineralogical investigation indicated that the Hg comes mainly from the deposited smelter emissions because no distinct Hg-rich microparticles corresponding to the windblown dust from the nearby disposal sites of the technological materials (concentrates, slags, tailings) were found. A comparison with the TD curves of the Hg reference compounds confirmed that the Hg in the biomass-rich topsoils occurs as a mixture of Hg bound to the organic matter and metacinnabar (black HgS), which exhibits similarities with the TD pattern of smelter flue dust residue. Despite the installation of a sulfuric acid plant in the smelter in 2015 and a calculated drop in the estimated Hg emissions (from 1301 +/- 457 kg/y for the period 2004-2015 to 67 +/- 5 kg/y after 2015), the Hg legacy pool in the smelter surroundings can potentially be re-emitted back to the atmosphere by wildfire. Using the Hg spatial distribution data in the area (184 km(2)), the estimates indicate that up to 303 kg and 1.3 kg can be remobilized from the topsoils and vegetation, respectively. (C) 2020 Elsevier Ltd. All rights reserved.
英文关键词	Mercury Topsoils Vegetation Wildfire Smelter pollution Semi-arid Namibia
类型	Article
语种	英语
国家	Czech Republic ; Namibia ; Germany
收录类别	SCI-E
WOS记录号	WOS:000527924400124
WOS关键词	LEGACY MINE SITE ; ELEMENTAL MERCURY ; PRESCRIBED FIRE ; SOIL PROFILES ; EMISSIONS ; ATMOSPHERE ; CONTAMINATION ; SPECIATION ; EXCHANGE ; BEHAVIOR
WOS类目	Environmental Sciences
WOS研究方向	Environmental Sciences & Ecology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/314255
作者单位	1.Charles Univ Prague, Fac Sci, Inst Geochem Mineral & Mineral Resources, Albertov 6, Prague 12800 2, Czech Republic; 2.Acad Sci Czech Republ, Inst Geol, Rozvojova 269, Prague 16500 6, Czech Republic; 3.Czech Geol Survey, Geologicka 6, Prague 15200 5, Czech Republic; 4.Czech Univ Life Sci Prague, Fac Agrobiol Food & Nat Resources, Dept Soil Sci & Soil Protect, Kamycka 129, Prague 16521 6, Czech Republic; 5.Univ Namibia, Fac Sci, Dept Geol, Windhoek 13301, Namibia; 6.Karlsruhe Inst Technol, Inst Photon Sci & Synchrotron Radiat, Hermann von Helmholtz Pl 1, DE-76344 Eggenstein Leopoldshafen, DE, Germany; 7.Friedrich Schiller Univ, Inst Geosci, Burgweg 11, D-07749 Jena, Germany
推荐引用方式 GB/T 7714	Tuhy, Marek,Rohovec, Jan,Matouskova, Sarka,et al. The potential wildfire effects on mercury remobilization from topsoils and biomass in a smelter-polluted semi-arid area[J],2020,247.
APA	Tuhy, Marek.,Rohovec, Jan.,Matouskova, Sarka.,Mihaljevic, Martin.,Kribek, Bohdan.,...&Ettler, Vojtech.(2020).The potential wildfire effects on mercury remobilization from topsoils and biomass in a smelter-polluted semi-arid area.CHEMOSPHERE,247.
MLA	Tuhy, Marek,et al."The potential wildfire effects on mercury remobilization from topsoils and biomass in a smelter-polluted semi-arid area".CHEMOSPHERE 247(2020).