Table 3.

Elemental content in lettuce root samples (LR) under treatment with different HMs.

	Pb	Mn	Cu	Zn	Cd	Ni	Control
Na *	5.2–10.9	4.4–6.7	4.7–7.2	5.0–6.9	5.4–7.5	5.1–7.6	4.9–5.6
K *	114–243	92.7–150	78.3–134	112–162	135–173	140–182	142–172
Fe **	1811–7194	1398–3960	1033–2554	394–2494	285–475	317–474	259–351
Co **	1.75–10.0	2.5–6.3	1.03–3.4	0.66–5.7	0.61–1.12	0.69–2.4	1.17–1.53
Zn **	116–485	140–286	121–234	1896–3347	96.6–152	103–312	82.9–97.1
As **	4.0–6.7	2.9–4.0	5.3–7.2	4.0–7.3	11.7–17.0	5.1–9.0	6.1–6.9
Br **	40.3–158	33.9–57.5	51.4–79.1	43.1–80.1	66.9–95.3	75.2–103	49.5–58.5
Rb **	51.8–129	42.6–87.4	39.4–63.6	51.0–77.7	55.2–79.2	56.8–82.6	52.6–73.4
Sr **	27.4–125	30.4–155	32.3–77.0	36.4–75.1	36.7–61.1	36.5–56.4	40.0–54.1
Sb ***	87.7–4510	78.9–2251	67.2–1839	82.7–1819	69.6–157	77.1–209	120–159
Cs ***	216–975	167–686	209–819	133–422	124–201	100–485	98.6–147
Ba **	-	-	-	38.9–67.3	-	23.9–45.6	14.3–23.8
La **	1.23–4.4	0.83–2.3	0.57–2.8	0.54–2.2	-	-	0.62–0.84
Sm ***	234–699	128–279	105–410	24.6–26.9	17.8–46.9	12.5–49.1	5.6–10.4
Th ***	225–1262	203–602	234–766	45.0–423	52.5–123	67.5–152	45.0–75.0
U ***	157–304	94.4–278	85.3–230	67.8–230	67.3–133	75.4–187	121–177

* g kg⁻¹; ** mg kg⁻¹; *** µg kg⁻¹.