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Table 2

Elemental composition of coffee residue and activated carbons

SampleElement (%)
C/H ratioC/N ratio
CHNSO
CR 52.0 7.54 2.29 0.193 38.0 6.89 22.7 
SA 57.7 3.97 2.56 0.176 35.6 14.5 22.5 
SB 57.3 2.21 1.91 0.312 38.3 25.9 30.1 
SampleElement (%)
C/H ratioC/N ratio
CHNSO
CR 52.0 7.54 2.29 0.193 38.0 6.89 22.7 
SA 57.7 3.97 2.56 0.176 35.6 14.5 22.5 
SB 57.3 2.21 1.91 0.312 38.3 25.9 30.1 
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