Evaluation of Adsorption Capacity in Water of Coffee Husk-Derived Biochar at Different Pyrolysis Temperatures

Table 2

Correlations between physical chemistry properties of biochar.

	t°C	%H			mmolH^+·g^−1	mmolOH^−·g^−1	%TOC	CEC, mmol.kg^−1
t°C	1	−0.924	0.958	0.984	−0.943	0.883	−0.988	−0.954
% H	−0.924	1	−0.970	−0.854	0.962	−0.673	0.958	0.875
	0.958	−0.970	1	0.919	−0.990	0.730	−0.985	−0.904
	0.984	−0.854	0.919	1	−0.905	0.907	−0.960	−0.922
mmolH^+·g^−1	−0.943	0.962	−0.990	−0.905	1	−0.692	0.976	0.863
mmolOH^−·g^−1	0.883	−0.673	0.730^∗	0.907	−0.692	1	−0.800	−0.876
%TOC	−0.988	0.958	−0.985	−0.960	0.976	−0.800	1	0.940
CEC, mmol·kg^−1	−0.954	0.875	−0.904	−0.922	0.863	−0.876	0.940	1

The correlation is significant at 0.01; the correlation is significant at 0.05.