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

Environmental Sciences Europe

Table 2 The concentrations of CdS/ZnS QDs located on root epidermis after the exposure of 8 h (rapid depuration stages)

Plant	QDs	C₀ (ng g⁻¹)	Sterilization treatment		Non-sterilization treatment
Plant	QDs	C₀ (ng g⁻¹)	C_r (ng g⁻¹)	K_r (h⁻¹)	C_r (ng g⁻¹)	K_r (h⁻¹)
Mangrove	Oleic acid-CdS/ZnS QDs	355.6^a ± 8.2^b	131.9 ± 4.1	0.3851	133.8 ± 4.9	0.3796
	PEG-COOH-CdS/ZnS QDs	198.4 ± 4.0	87.8 ± 3.5	0.3228	90.2 ± 3.2	0.3142
	MPA-COOH-CdS/ZnS QDs	176.6 ± 3.9	86.5 ± 2.6	0.2917	84.4 ± 1.7	0.2989
Wheat	Oleic acid-CdS/ZnS QDs	289.7 ± 6.3	121.5 ± 8.1	0.3406	111.4 ± 5.9	0.3715
	PEG-COOH-CdS/ZnS QDs	155.2 ± 5.1	81.3 ± 4.6	0.2727	85.5 ± 2.6	0.2593
	MPA-COOH-CdS/ZnS QDs	167.8 ± 2.6	84.0 ± 1.3	0.2497	81.7 ± 2.5	0.2934

^aMean values of the concentrations of CdS/ZnS QDs located on root epidermis of six groups
^bStandard deviations of the concentrations of CdS/ZnS QDs located on root epidermis of six groups