Toxicity Assessment of Sediments with Natural Anomalous Concentrations in Heavy Metals by the Use of Bioassay

Table 2

Water-soluble heavy-metal concentrations (mg kg^-1) in sediments from peridotite and from other materials in the Verde River basin.

	Peridotite	Other materials
Mn	0.497±0.245	0.280±0.151
Cr	0.013±0.004	0.002±0.001
Co	0.015±0.006	0.003±0.001
Ni	0.153±0.048	0.008±0.002
Cu	0.009±0.002	0.008±0.002
Zn	0.019±0.006	0.011±0.006
As	0.005±0.001	0.004±0.002
Pb	0.0004±0.0003	0.0004±0.0003