Table 3.

The kinetic parameters of Al released from the sample in different organic acids.

The Solution	${\mathbf{C}}_{\mathit{t}}=\mathbf{a}+\mathbf{b}{\mathit{t}}^{1/2}$		${\mathbf{C}}_{\mathit{t}}=\mathbf{a}+\mathbf{b}\mathbf{l}\mathbf{n}\mathit{t}$		${\mathbf{C}}_{\mathit{t}}=\mathbf{a}(1-\mathbf{e}\mathbf{x}\mathbf{p}(-\mathbf{k}\mathit{t}\left)\right)$
	b	R2	b	R2	b	R2
Composite acid	16.28	0.985	104.80	0.889	9.55 × 10−4	0.997
Citric acid	5.91	0.969	37.66	0.855	4.58 × 10−4	0.993
Oxalic acid	5.20	0.977	33.29	0.869	5.84 × 10−4	0.996
Blank	0.24	0.992	1.59	0.946	2.21 × 10−4	0.993