An Investigation of the Levels and Distribution of Selected Heavy Metals in Sediments and Plant Species within the Vicinity of Ex-Iron Mine in Bukit Besi

Table 8

Normal, excessive, and toxic values of metals in mature leaf tissue and vegetation generalized for various species (µg/g).

Element	Sufficient or normal values	Excessive or toxic values	Tolerable in crop plant
Cd	0.05–0.2	5–30	0.05–0.5
Pb	5–10	30–300	0.5–10
Fe	45–200	200–500	100