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. 2021 May 13;12:665090. doi: 10.3389/fmicb.2021.665090

TABLE 1.

Potential ecological indices (Ei) for heavy metals and potential ecological risk index (RI) of heavy metals in all samples.

Name Potential ecological risk indices for single heavy metal (Ei)
As Cd Cu Hg Ni Cr Pb Zn RI
S1 274.4 43427.0 24786.4 5849.1 59.1 27.7 293.9 86.4 74804.0
S2 80.5 27356.8 2185.0 11313.2 48.8 16.4 224.0 39.1 41263.7
S3 111.3 16597.3 1347.0 2996.2 36.0 4.8 175.0 42.9 21310.4
S4 93.4 38845.9 1922.7 4196.2 49.5 18.1 309.8 73.5 45509.2
S5 54.0 15089.2 1395.1 4075.5 29.8 10.8 153.8 46.3 20854.5
S6 29.8 9048.6 1086.0 4279.2 29.9 9.9 158.0 41.3 14682.8
S7 41.0 23918.9 1695.4 7849.1 42.9 15.0 193.8 83.1 33839.3
S8 31.3 17764.9 1111.5 2528.3 33.0 3.8 86.3 47.2 21606.2