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

Table 1

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

	Peridotite	Other materials
Mn	1244.95±81.92	708.07±165.37
Cr	1040.79±131.15	236.00±125.62
Co	114.86±14.21	34.00±13.49
Ni	1833.26±232.46	372.78±273.77
Cu	23.93±1.45	32.50±4.09
Zn	69.40±6.10	166.64±67.25
As	4.94±0.80	26.41±13.30
Pb	19.43±4.09	21.75±6.97