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Table 1 Ecological hazard quotient of the heavy metal composition of spent crude oil-polluted soil within Benin metropolis

From: Hazard quotient, microbial diversity, and plant composition of spent crude oil-polluted soil

 

aCr [1]

Mn [100]

Zn [50]

Fe [200]

Cd [4]

Soil around generator plant

Egor GN

1.08

0.0352

1.8524

8.2611

0.0015

Ikpoba GN

1.02

0.0056

1.3044

8.0061

0.0075

Oredo GN

0.09

0.0069

0.06748

6.8121

> 104

Ovia GN

1.32

0.0633

4.2216

8.16125

0.0015

Soil within auto mechanic workshop

Egor MW

2.19

0.0965

4.1108

9.32015

0.0155

Ikpoba MW

1.82

0.0159

3.1172

8.2382

0.0055

Oredo MW

0.98

0.0109

1.1714

6.29095

> 104

Ovia MW

2.10

0.0934

3.3114

6.82615

0.0135

Soil within auto spare parts stores

Egor SP

1.09

0.0698

3.7102

8.60325

0.005

Ikpoba SP

0.98

0.0096

1.1964

7.81815

> 104

Oredo SP

0.42

0.0038

0.539

6.52605

0.004775

Ovia SP

0.98

0.0098

1.2496

7.46625

> 104

Soil around bakery

Egor BK

0.68

0.0105

0.125

8.152-5

> 104

Ikpoba BK

0.28

0.0019

0.079

7.9932

> 104

Oredo BK

0.49

0.0033

0.03244

6.49105

> 104

Ovia BK

0.39

0.0028

0.5934

7.41105

> 104

Mean

     
  1. Values in bracket are permissible limits [12]
  2. GN electric power generator plant house, BK bakery, MW auto mechanic workshop, SP auto spare parts shop
  3. aToxic level