Table 1.

Characteristics of anion exchange resins used in this research.

Resin	Basicity	Polymer composition/Pore structure	Functional group	Exchange capacity (eq/L)a	Exchange capacity (meq/g)b	pKa	Water Content (%) at pH 7
IRA67	WB	PA/G	Tertiary amine: Dimethylc	1.6	4.56	9.0f	56–64h
IRA96	WB	PS/MP	Tertiary amine: Dimethylc	1.25	3.29	6.4f	57–63h
IRA458	SB	PA/G	Type I: Trimethyld	1.25	4.10	>13 g	57–64i
A520E	SB	PS/MP	Type I: Triethyle	0.9	2.44	>13 g	50–56i
Strong-Base (SB), Weak-Base (WB), Polyacrylic (PA), Polystyrene (PS), Gel (G), Macroporous (MP).

^aData obtained from the manufacturer.

^bDetermined experimentally.

^cR-(CH₃)₂HN⁺ (protonated form) or R-(CH₃)₂N (free-base form).

^dR-(CH₃)₃N⁺.

^eR-(CH₂CH₃)₃N⁺.

^f(Miyazaki and Nakai, 2011).

^g(Clifford and Weber, 1983).

^hManufacturer data for resin in free-base form.

ⁱManufacturer data for resin in chloride form.