Table 5 Heavy metal content in nitrogen fertilizer produced in this study.

From: Environmental and energy analysis of chromium recovery from residual tanned leather using alkaline thermal hydrolysis

Name of heavy metals

As

Pb

Cd

Zn

Hg

Ag

Cu

Content in nitrogen fertilizer (mg/kg)

< 0.1

< 0.01

< 0.005

< 0.005

< 0.5

0.03

3.65

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