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题名: Dominant factor affecting Pb speciation and the leaching risk among land- use types around Pb-Zn mine
作者: Tian, Haixia1;  Fang, Linchuan2;  Duan, Chengjiao1, 2;  Wang, Yunqiang3;  Wu, Hao4
关键词: Land-use ;  Pb ;  Speciation ;  Leaching risk ;  Mine
刊名: GEODERMA
发表日期: 2018-09-15
DOI: 10.1016/j.geoderma.2018.04.016
卷: 326, 期:4, 页:123-132
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Life Sciences & Biomedicine
类目[WOS]: Soil Science
研究领域[WOS]: Agriculture
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.
关键词[WOS]: MICROBIAL COMMUNITY STRUCTURE ;  SEQUENTIAL EXTRACTION PROCEDURE ;  SOIL ENZYME-ACTIVITIES ;  HEAVY-METALS ;  LOESS PLATEAU ;  SPATIAL-DISTRIBUTION ;  CHEMICAL SPECIATION ;  ECOLOGICAL RISK ;  ORGANIC-MATTER ;  HEALTH-RISK
语种: 英语
WOS记录号: WOS:000433648800011
Citation statistics: 
内容类型: 期刊论文
URI标识: http://ir.ieecas.cn/handle/361006/5144
Appears in Collections:生态环境研究室_期刊论文

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作者单位: 1.Northwest A&F Univ, Minist Agr, Coll Nat Resources & Environm, Key Lab Plant Nutr & Agroenvironm Northwest China, Yangling 712100, Shaanxi, Peoples R China
2.Northwest A&F Univ, State Key Lab Soil Eros & Dryland Farming Loess P, Yangling 712100, Shaanxi, Peoples R China
3.Chinese Acad Sci, Inst Earth Environm, State Key Lab Loess & Quaternary Geol, Xian 710061, Shaanxi, Peoples R China
4.Cent China Normal Univ, Wuhan 430079, Hubei, Peoples R China

Recommended Citation:
Tian, Haixia,Fang, Linchuan,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.
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