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Table 4 The elemental composition of root epidermis and its relationships with the Ks values

From: The depuration fate of the mixtures of CdS/ZnS quantum dots (QDs) with different surface coatings on mangrove and wheat root epidermis: results from a novel method

Root

C (%)

O (%)

N (%)

S (%)

(O + N)/C

Oleic acid-CdS/ZnS QDsa

PEG-COOH-/MPA-COOH-CdS/ZnS QDs

Ks (h−1)

R 2(b)

p c

Ks (h−1)

R 2

p

Mangrove

61.39

32.77

4.34

1.50

0.60

9.315 × 10−3

0.9013

0.032

8.429 × 10−3/8.371 × 10−3

0.2079/0.4442

0.831/0.704

Wheat

59.82

33.61

5.14

1.43

0.65

9.433 × 10−3

0.9346

0.040

7.892 × 10−3/8.284 × 10−3

0.3318/0.3695

0.902/0.721

  1. aThe relationships between the polarity index ((O + N)/C) of root and the Ks values
  2. bR2 represents the correlation coefficients
  3. cp represents the significantly level, p < 0.05 indicates the correlation is significant