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Table 3 Results of the TCLP standard procedure of AN20 bricks. Comparison with limit concentrations of Ni (II)

From: Ceramic bricks containing Ni ions from contaminated biomass used as an adsorbent

Heavy metal

TCLP of AN20

(mg L− 1)

Decree No. 2020 of 2007 of Law No. 2214 of the City of Buenos Aires (CABA)

(mg L− 1)

US EPA Code of Federal Regulations 2012

(mg L− 1)

UNE-EN 12457–4

(Spanish standard)

(mg L− 1)

GB 5085.3–2007

(Chinese standard)

(mg L− 1)

Ni

<  0.05

5.0

Not Given

2.0–0.4

5.0