Table 5 The results of XPS C 1 s and O 1 s multiplets peak fitting.

From: Enhanced removal of heavy metal ions from aqueous solution using manganese dioxide-loaded biochar: Behavior and mechanism

Sorbents

C-C

C-O

O2−

OH−

H2O

BEa (eV)

FWHMb (eV)

At.c (%)

BE (eV)

FWHM (eV)

At. (%)

BE (eV)

FWHM (eV)

At. (%)

BE (eV)

FWHM (eV)

At. (%)

BE (eV)

FWHM (eV)

At. (%)

BC@MnO2-26.6

284.3

1.28

78.4

285.2

1.88

21.6

529.5

1.20

63.2

530.2

1.73

26.6

531.8

1.47

10.2

BC@MnO2-26.6-Pb

284.3

1.18

67.4

285.1

1.56

32.6

529.2

1.14

67.4

530.4

1.76

23.0

531.8

1.63

9.6

  1. aBinding energy.
  2. bThe FWHM of all peaks were constrained.
  3. cAt. represents the percentage of the contribution for each peak to the total number of counts under the Mn 2p3/2 or O 1 s peak, and all peaks modeled as 70% Gaussian-30% Lorentzian.
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