Table 2 Range of calculated LEPs in aqueous solutions with NaCl or with an elemental composition based on rice soil pore waters with different concentrations of bicarbonate, i.e., solution A with 2 mmol dm−3 and solution B with 8 mmol dm−3.

From: Synergistic use of siderophores and weak organic ligands during zinc transport in the rhizosphere controlled by pH and ion strength gradients

D

 

Ligand exchange point (LEP)

Solution A

Solution B

NaCl

Ion strength

0.01 mol dm−3

6.5–8.4

6.5–8.5

7.4

0.10 mol dm−3

6.5–8.0

6.4–8.1

7.1

1.00 mol dm−3

6.3–7.2

6.3–7.4

6.5

pH

4

nd

nd

nd

6

0.58–1

0.48–0.92

0.73

8

nd

nd

nd

  1. Details of chemical composition are given in captions of Fig. 6.
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