Distribution of Major and Trace Elements in a Tropical Hydroelectric Reservoir in Sarawak, Malaysia

Table 2

The nonzero average of metal contents in different samples.

Elements	Water; (mg/L except Hg in g/L)	Sediment; (mg/kg)	Macroalgae; (mg/kg)	Aquatic plants; (mg/kg)	Fish; (mg/kg)	Literature range in sediment (mg/kg)	Literature range in water; (mg/L and g/L if indicated with*)
Na		nd				3190–6910^a	—
K						7550–17300^a	—
Mn					nd	348–5740^a; 167–915^c	4–86^a; 0.038–0.239^c; 0.2–10^d; 0.05^e
Cr				nd		40–343^a; 30.2–74.8^b; 92.5–160^c; 37.3^f; 90^g	7-8^a; 2.4–7.; 0.003–0.037^c; 0.1^d; 0.05^e
Ni	nd		nd	nd	nd	11.6–64.5^a; 6.2–17.8^b; <0.05^c; 21^f; 52^g	9–18^a; 1.2–5.; 0.005–0.035^c; 0.2^d
Zn	nd		nd	nd	nd	54–904^a; 21.8–127^b; 182–484^c; 123^f; 315^g	<5^a; 26–88.; 0.016–0.066^c; 2^d; 5^e
Mg						2400–7630^a	11200–17300^a
Fe						8340–25400^a; 12842–53581^c	90–164^a; 0.088–0.463^c; 5^d; 0.3^e
Sn	nd				nd
Al	nd					20000–52200^a; 12280–35035^c	20–98^a; 0.024–0.149^c; 5^d
Ca						16000–82100^a
As		nd	nd	nd	nd	3.2–7.4^a; 34.1–112.8b	11–14^a; 13.1–47.
Se			nd	nd	nd		—
Hg						0.17–0.35b	0.01–0.

Blackfoot River watershed [24].
Port Klang coastal area [25].
Nile Delta [26].
Food and Agriculture Organization Guidelines, 1985 [26].
Canadian water quality guidelines for the protection of aquatic life [26].
Interim freshwater sediment quality guidelines [26].
Probable effect level [26].
indicates unit in g.