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Table 5 The content of Fe, Co and Ni in coal samples

From: The diversity of hydrogen-producing bacteria and methanogens within an in situ coal seam

Coal no. Location Fe/mg Kg−1 Co/μg Kg−1 Ni/μg Kg−1
C1 Yima 2235.33 1289.75 4477.59
C2 Liyazhuang 618.48 1417.73 3781.58
C3 Shaqu 421.90 925.38 4460.60
C4 Hebi 3308.47 1488.05 9126.36
C5 Jingcheng 3706.94 1947.78 5523.24
C6 Suzhou 4057.55 3892.16 12,117.65
C7 Neimeng 17,886.79 9459.12 32,816.75
C8 Jiaozuo 978.54 35,431.68 15,418.08
C9 Shoushan 3548.95 2410.61 10,014.18
C10 Pingdingshan 893.68 5825.13 15,301.62