Table 1.

Concentration of lead and cadmium (μg g⁻¹ dry wt.) in date palm fruit growing in different locations of Riyadh.

Sites name	Fruit stage – Bisr
	Washing		Flesh
	Lead	Cadmium	Lead	Cadmium
Dammam Freeway-bridge-4	0.22 ± 0.01 gh	0.38 ± 0.06 bc	1.07 ± 0.51 f	0.10 ± 0.02 bcd
Dammam Freeway-bridge-6	1.46 ± 0.08 d	0.47 ±0.02 ab	1.87 ± 0.03 abcd	0.12 ± 0.02 bcd
Manakh Garden-1	6.57 ± 0.37 a	0.39 ± 0.07 bc	2.06 ± 0.07 abc	0.13 ± 0.02 bcd
Manakh Garden-2	3.37 ± 0.01 b	0.35 ± 0.06 bcd	2.14 ± 0.03 ab	0.10 ± 0.01 cd
Naseriah Road (near gas station)	0.17 ± 0.01 gh	0.49 ± 0.13 ab	2.29 ± 0.01 a	0.09 ± 0.03 cd
Naseriah Road	2.27 ± 0.07 c	0.64 ± 0.04 a	1.85 ± 0.04 abcd	0.12 ± 0.01 bcd
Bat-ha-manfooha Road	0.78 ± 0.01 e	0.62 ± 0.08 a	1.57 ± 0.10 de	0.08 ± 0.01 d
University Road (Malaz)	0.43 ± 0.04 fg	0.50 ± 0.07 ab	1.40 ± 0.03 def	0.14 ± 0.01 bc
King Fahad Freeway (Faisalliah)	0.72 ± 0.01 ef	0.28 ± 0.04 cd	1.28 ± 0.04 ef	0.14 ± 0.01 bc
King Fahad Freeway (Near Toyota)	0.16 ± 0.01 gh	0.20 ± 0.03 d	1.68 ± 0.06 bcde	0.15 ± 0.01 ab
King Fahad Freeway	0.73 ± 0.01 ef	0.51 ± 0.03 ab	1.35 ± 0.07 ef	0.16 ± 0.01 ab
Al-Shafa Highway	1.51 ± 0.01 d	0.39 ± 0.03 bc	1.63 ± 0.04 cde	0.19 ± 0.01 a
Mashtal (Palm Groove)	ND	ND	1.36 ± 0.08 ef	0.08 ± 0.02 d
King Abdulaziz Highway	0.35 ± 0.01 g	0.19 ± 0.03 d	1.58 ± 0.04 de	0.16 ± 0.02 ab

Each value is a mean of three replicates (n = 3) ± SE. Data with the same letter within a column are not significantly different at P < 0.05 level as determined by Duncan’s multiple range test.

ND, not detected.