Lead Phytoextraction from Contaminated Soil with High-Biomass Plant Species
Zhen-Guo Shena,
Xiang-Dong Li*,b,
Chun-Chun Wangc,
Huai-Man Chena and
Hong Chuad
a Inst. of Soil Science, Chinese Academy of Sciences, Nanjing, 210008, China
b Dep. of Civil and Structural Engineering, The Hong Kong Polytechnic University, Kowloon, Hong Kong
c Dep. of Agronomy, Nanjing Agricultural University, Nanjing, 210095, China
d Dep. of Civil & Structural Engineering, The Hong Kong Polytechnic University, Kowloon, Hong Kong

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Fig. 1. Effects of chelate application on the Pb concentrations in soil solution (3 d after chelate application). Values are means ± SEs (n = 3).
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Fig. 2. Lead solubilization from the soil after ethylenediaminetetraacetic acid (EDTA) and diethylenetriaminepentaacetic acid (DTPA) application. Values are means ± SEs (n = 3).
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Fig. 3. Effects of chelate application on (a) shoot dry yields and (b) Pb concentrations in cabbage shoots. Values are means ± SEs (n = 3).
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Fig. 4. Relationship between the Pb concentration in soil solution and cabbage shoots.
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Fig. 5. Effects of ethylenediaminetetraacetic acid (EDTA) application level on (a) dry matter yield, (b) soluble Pb concentration in soil, and (c) Pb concentration in cabbage shoots. Values are means ± SEs (n = 3).
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Fig. 6. Relative efficiency of ethylenediaminetetraacetic acid (EDTA) application in enhancing the Pb accumulation in cabbage shoots. Values are means ± SEs (n = 3).
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Fig. 7. Effects of ethylenediaminetetraacetic acid (EDTA) application methods on (a) the Pb concentrations in cabbage shoots and (b) the soluble Pb concentration in soil at 8.0 to 8.5 cm below the surface at the same total application amount (1.5 mmol/kg soil). Values are means ± SEs (n = 3).
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Copyright © 2002 by the American Society of Agronomy, Crop Science Society of America, and Soil Science Society of America.