Modeling the Sorption of Ni²⁺ and Co²⁺ on Saprist Peat Using the Response Surface Methodology

Table 6

% desorption of Ni²⁺ and Co²⁺ at a peat dose of 40 g/L and solution pH of 10.

Initial cation conc. (mg/L)	Ni^2+		Co^2+
	12.5	200	12.5	200
% desorption with 0.5 M HCl	78.5	93.5	50.6	69.1
% desorption with 1.0 M HCl	82.4	96.9	61.7	72.5
% desorption with 2.0 M HCl	92.0	97.5	67.1	83.5