Allocation and source attribution of lead and cadmium in maize (Zea mays L.) impacted by smelting emissions

被引:127
作者
Bi, Xiangyang [1 ,2 ]
Feng, Xinbin [1 ]
Yang, Yuangen [1 ]
Li, Xiangdong [3 ]
Shin, Grace P. Y. [3 ]
Li, Feili [4 ]
Qiu, Guangle [1 ]
Li, Guanghui [1 ]
Liu, Taoze [1 ]
Fu, Zhiyou [1 ]
机构
[1] Chinese Acad Sci, Inst Geochem, State Key Lab Environm Geochem, Guiyang 550002, Peoples R China
[2] China Univ Geosci, Minist Educ, Key Lab Biogeol & Environm Geol, Wuhan 430074, Peoples R China
[3] Hong Kong Polytech Univ, Dept Civil & Struct Engn, Kowloon, Hong Kong, Peoples R China
[4] Zhejiang Univ Technol, Coll Biol & Environm Engn, Hangzhou 310032, Zhejiang, Peoples R China
关键词
Lead; Cadmium; Pb isotopes; Maize; Atmospheric deposition; Soil; Zinc smelting; China; HEZHANG COUNTY; HEAVY-METALS; MERCURY CONTAMINATION; QUANTITATIVE ASSESSMENT; INDIGENOUS METHODS; PISUM-SATIVUM; ZINC; SOILS; URBAN; GUIZHOU;
D O I
10.1016/j.envpol.2008.11.013
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
Plants grown in contaminated areas may accumulate trace metals to a toxic level via their roots and/or leaves. In the present study, we investigated the distribution and sources of Pb and Cd in maize plants (Zea mays L) grown in a typical zinc smelting impacted area of southwestern China. Results showed that the smelting activities caused significantly elevated concentrations of Pb and Cd in the surrounding soils and maize plants. Pb isotope data revealed that the foliar uptake of atmospheric Pb was the dominant pathway for Pb to the leaf and grain tissues of maize, while Pb in the stalk and root tissues was mainly derived from root uptake. The ratio of Pb to Cd concentrations in the plants indicated that Cd had a different behavior from Pb, with most Cd in the maize plants coming from the soil via root uptake. (C) 2008 Elsevier Ltd. All rights reserved.
引用
收藏
页码:834 / 839
页数:6
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