干旱区生态环境知识资源中心(Arid): CO2 fluxes in the chemical weathering of carbonate-hosted tailings ponds, Panxi valley, Sichuan province, China

Arid

DOI	10.1007/s12665-022-10506-6
	CO2 fluxes in the chemical weathering of carbonate-hosted tailings ponds, Panxi valley, Sichuan province, China
	Sun, Lu; Werner, Tim; Yang, Fang; Xu, Wenlai; Tang, Liang
通讯作者	Tang, L
来源期刊	ENVIRONMENTAL EARTH SCIENCES
ISSN	1866-6280
EISSN	1866-6299
出版年	2022
卷号	81 期号:15
英文摘要	Growing and intensified mining activities in China have produced substantial quantities of carbonate-bearing tailings wastes. Rapid chemical weathering of these wastes, accompanied by active CO2 fluxes (CO2 absorption and degassing), have the potential to positively or negatively influence the emissions arising from the mining sector. However, few prior studies have examined these processes and effects. Herein, we present a systematic investigation of the chemical and mineral composition, hydro-geochemistry, and isotopes of four tailings ponds and filtrates in Panxi valley, Sichuan province, China. Our results reveal that significant rock-water interactions have occurred in carbonate-hosted tailings with active carbonate and silicate dissolution. The abundance of sulfuric acid in the dissolved load, derived from sulfide oxidation, provides a non-negligible portion of protons for chemical weathering. The influences on cationic weathering, therefore, were found to be carbonic-carbonate weathering > sulfide-carbonate weathering > sulfide-silicate weathering > mineral processing inputs > nature inputs > atmospheric inputs. Exoreic river basin tailings have the potential to fix atmospheric CO2 and provide a valuable strategy toward China's carbon neutrality goals. However, inland/arid area mining also has the potential to risk net CO2 degassing and hence encumber the mining industry's carbon performance.
英文关键词	Carbonate-bearing tailings Chemical weathering CO2 fluxes Carbon neutralization
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000829969800003
WOS关键词	DOLOMITE DISSOLUTION RATES ; NITRATE SOURCES ; MINE TAILINGS ; RIVER ; CALCITE ; WATER ; DELTA-C-13 ; FIXATION ; KINETICS ; DEPOSITS
WOS类目	Environmental Sciences ; Geosciences, Multidisciplinary ; Water Resources
WOS研究方向	Environmental Sciences & Ecology ; Geology ; Water Resources
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/392453
推荐引用方式 GB/T 7714	Sun, Lu,Werner, Tim,Yang, Fang,et al. CO2 fluxes in the chemical weathering of carbonate-hosted tailings ponds, Panxi valley, Sichuan province, China[J],2022,81(15).
APA	Sun, Lu,Werner, Tim,Yang, Fang,Xu, Wenlai,&Tang, Liang.(2022).CO2 fluxes in the chemical weathering of carbonate-hosted tailings ponds, Panxi valley, Sichuan province, China.ENVIRONMENTAL EARTH SCIENCES,81(15).
MLA	Sun, Lu,et al."CO2 fluxes in the chemical weathering of carbonate-hosted tailings ponds, Panxi valley, Sichuan province, China".ENVIRONMENTAL EARTH SCIENCES 81.15(2022).