Table 4 TCLP leaching concentrations from cement paste of different amounts of BRM.

From: Performance of cementitious composites with bayer red mud as a partial cement replacement

Application

Metal (metalloid) (mg/L)

Ag

Hg

Ni

Cu

Zn

Pb

Cd

As

Ba

Cr

BRM

0.002

0.017

0.003

0.010

0.026

0.006

0.001

0.514

ND

3.327

BRM−0.5

ND

ND

0.014

ND

0.024

0.005

ND

ND

5.222

0.009

BRM−1

ND

ND

0.016

ND

0.024

0.006

ND

ND

5.301

0.007

BRM−5

ND

ND

0.016

0.003

0.021

0.006

ND

ND

4.360

0.004

BRM−10

ND

ND

0.011

0.004

0.023

0.006

ND

ND

2.816

0.005

BRM−15

ND

ND

0.009

0.007

0.023

0.006

ND

ND

1.663

0.006

TCLPa regulatory limits

5

0.2

25

15

25

5

1

5

100

5

GB 5085.3−2007b limits

5

0.1

5

100

100

5

1

5

100

15

  1. ND: not detected; aTCLP: toxicity characteristic leaching procedure; bChinese Standard: Identification Standards for Hazardous Wastes-Identification for extraction toxicity.
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