Erratum to: Int J Ind Chem (2015) 6:43–58 DOI 10.1007/s40090-015-0031-2

The authors would like to call your attention to the fact that the figure is not part of Table 4. The detailed explanation of the figure can be found under the section “Desorption study” in the original article.

Table 4 Equilibrium isotherm parameters for Cr3+, Ni2+ and Zn2+ adsorption (pH 3.0; AD 10.0 g; agitation time 2 h)

S. no.

Metal

T (K)

Langmuir

Freundlich

Temkin

q m,(exp.)

q m,(cal.)

b

χ 2

R 2

n

K f

R 2

a

b

R 2

1.

Cr3+

298

15.0

19.6

0.7

1.0

0.99

2.9

0.05

0.88

1.0

8.1 × 102

0.95

2.

308

24.5

32.2

1.0

1.8

0.99

2.5

0.04

0.91

1.0

4.8 × 102

0.95

3.

313

31.5

31.2

3.5

0.02

0.99

3.5

0.11

0.98

1.6

5.7 × 102

0.98

4.

Ni2+

298

19.7

23.2

1.05

0.5

0.99

1.90

2.2

0.89

0.3

4.5 × 102

0.97

5.

308

30.0

31.2

0.27

0.1

0.99

1.94

3.1

0.91

0.7

3.0 × 102

0.97

6.

313

43.7

45.4

1.15

0.2

0.99

1.98

3.6

0.95

0.9

2.6 × 102

0.98

7.

Zn2+

298

18.1

17.2

1.5

0.04

0.99

1.9

4.4

0.91

1.1

2.1 × 102

0.97

8.

308

30.6

34.5

1.2

0.4

0.99

2.5

3.2

0.84

1.0

3.7 × 102

0.95

9.

313

43.4

55.5

2.1

2.2

0.99

3.1

2.5

0.87

1.0

7.0 × 102

0.98