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Table 9 Heavy metal content in the LRC used for the formulation

From: Design of a bio-conditioner prototype for the treatment of degraded soils: biomass production and lignite formulation for Microbacterium sp. CSB3

SpeciesLRCPermissible concentration in soil
ContentsUncertaintyNormal range (mg kg−1)Source
As (mg kg−1)3.90 < 5–40Bowie and Thornton (1985) cited by Galán and Romero [16]
Cd (mg kg−1)2.10 < 1–2Bowie and Thornton (1985) cited by Galán and Romero [16]
Cu (mg kg−1) < 4005–30EPA, (1996) cited by Mahecha et al. [39]
Pb (mg kg−1)22.5010
Toxicity > 100
EPA, (1996) cited by Mahecha et al. [39]
Hg (mg kg−1) < 0.200,07–0,3UN Economic Commission for Europe cited by Camargo-Garcia [38]
Zn (mg/Kg) < 4005–200
Toxicity > 400
Bowie and Thornton (1985) cited by Galán and Romero [16]
EPA, (1996) cited by Mahecha et al. [39]