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Lead Phytoextraction from Contaminated Soil with High-Biomass Plant Species

^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

View larger version (17K): [in a new window]   Fig. 1. Effects of chelate application on the Pb concentrations in soil solution (3 d after chelate application). Values are means ± SEs (n = 3).

View larger version (26K): [in a new window]   Fig. 2. Lead solubilization from the soil after ethylenediaminetetraacetic acid (EDTA) and diethylenetriaminepentaacetic acid (DTPA) application. Values are means ± SEs (n = 3).

View larger version (24K): [in a new window]   Fig. 3. Effects of chelate application on (a) shoot dry yields and (b) Pb concentrations in cabbage shoots. Values are means ± SEs (n = 3).

View larger version (16K): [in a new window]   Fig. 4. Relationship between the Pb concentration in soil solution and cabbage shoots.

View larger version (25K): [in a new window]   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).

View larger version (19K): [in a new window]   Fig. 6. Relative efficiency of ethylenediaminetetraacetic acid (EDTA) application in enhancing the Pb accumulation in cabbage shoots. Values are means ± SEs (n = 3).

View larger version (24K): [in a new window]   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).