Dominant factor affecting Pb speciation and the leaching risk among land- use types around Pb-Zn mine

doi:10.1016/j.geoderma.2018.04.016

	Dominant factor affecting Pb speciation and the leaching risk among land- use types around Pb-Zn mine
	Wu, Hao 1; Wang, Yunqiang 2; Duan, Chengjiao 3,4; Fang, Linchuan 3; Tian, Haixia 4
刊名	GEODERMA
	2018-09-15
卷号	326 期号:4 页码:123-132
关键词	Land-use Pb Speciation Leaching Risk Mine
DOI	10.1016/j.geoderma.2018.04.016
文献子类	Article
英文摘要	Soil lead (Pb) pollution around the mining area has severely threaten human health. However, Pb leaching risk in soils with different land uses and which is the proper land use are still unknown. In this work, Pb speciation characteristics and the dominant soil factors affecting Pb speciation in three land uses (farmland, woodland, and grassland) surrounding the Pb-Zn mine in Feng Country, Shaanxi province were investigated. Moreover, the Pb leaching risk and associated determining factors were evaluated by the combination of leached Pb concentration and structural equation model (SEM). The results showed that farmland presented the highest total Pb content (410.1 mg kg(-1)) among three land use types. The reducible fraction of Pb (Fe-Mn oxides bound) was the major speciation ( > 50%) in all tested soils of three land-use types. Soil total phosphorus (TP), water content (WC), and pH play major role in regulating Pb speciation. Though soil biological properties, like microbial communities, catalase, and microbial biomass nitrogen (MBN) exhibited distinct responses to three different land uses, they showed minor influence on Pb speciation. More interestingly, SEM analysis indicated that Pb leaching risk was directly linked with bacteria abundance, total Pb content, clay content, and C/N. Grassland presented the higher predicted Pb leaching concentration (85.03 mg kg(-1)), compared with that in woodland, suggesting that grassland was the worst land-use type to buffer the Pb toxicity. Woodland could be recommended as the proper native land use to alleviate environmental risk. Overall, our results demonstrated the dominant factor to regulate Pb speciation and pointed out the proper land-use in relieving Pb leaching risk around Pb-Zn mine. These finding provides the new strategies to the remediation and management of metal-contaminated soil.
WOS关键词	MICROBIAL COMMUNITY STRUCTURE ; SEQUENTIAL EXTRACTION PROCEDURE ; SOIL ENZYME-ACTIVITIES ; HEAVY-METALS ; LOESS PLATEAU ; SPATIAL-DISTRIBUTION ; CHEMICAL SPECIATION ; ECOLOGICAL RISK ; ORGANIC-MATTER ; HEALTH-RISK
WOS研究方向	Agriculture
语种	英语
WOS记录号	WOS:000433648800011
内容类型	期刊论文
源URL	[http://ir.ieecas.cn/handle/361006/5144]
专题	地球环境研究所_生态环境研究室
作者单位	1.Cent China Normal Univ, Wuhan 430079, Hubei, Peoples R China 2.Chinese Acad Sci, Inst Earth Environm, State Key Lab Loess & Quaternary Geol, Xian 710061, Shaanxi, Peoples R China 3.Northwest A&F Univ, State Key Lab Soil Eros & Dryland Farming Loess P, Yangling 712100, Shaanxi, Peoples R China 4.Northwest A&F Univ, Minist Agr, Coll Nat Resources & Environm, Key Lab Plant Nutr & Agroenvironm Northwest China, Yangling 712100, Shaanxi, Peoples R China
推荐引用方式 GB/T 7714	Wu, Hao,Wang, Yunqiang,Duan, Chengjiao,et al. Dominant factor affecting Pb speciation and the leaching risk among land- use types around Pb-Zn mine[J]. GEODERMA,2018,326(4):123-132.
APA	Wu, Hao,Wang, Yunqiang,Duan, Chengjiao,Fang, Linchuan,&Tian, Haixia.(2018).Dominant factor affecting Pb speciation and the leaching risk among land- use types around Pb-Zn mine.GEODERMA,326(4),123-132.
MLA	Wu, Hao,et al."Dominant factor affecting Pb speciation and the leaching risk among land- use types around Pb-Zn mine".GEODERMA 326.4(2018):123-132.