Summary of adsorption capacities for As of LDH derived adsorbents.

Adsorbent	Initial As concentration (mg L−1)	pH	Adsorption capacity/(mg g−1)		Ref.
			As(iii)	As(v)
Calcined Mg–Al–CO3	997.5	10	158.25		75
Calcined Mg–Al–CO3	0.2	10		0.17	76
Calcined Mg–Al–CO3	0.1	7.5		0.02	77
Li–Al–Cl	52.5	5		24.19	78
Ca–Al–Cl	1125	10.5		361.7	82
Cu–Mg–Fe–La–CO3	5	3		75	83
Mn–Fe–CO3	100	7.8	112.5	52.5	66
Zn–Fe–SO4	50	4		143	86
Mg–Al–Cl	150	7	36		100
Mg–Fe–Cl	187.5	7	81		100
Cu–Al–Cl	120	7	52.5		100
Zn–Al–Cl	150	7	35.25		100
Mg–Fe–S2O8 LDH	5	4	12.5	17.5	88
Mg–Al–MoS4 LDH	306	≈11	99	56	89
Mg–Al–NO3	87.75	5		117	91
Calcined Mg–Fe–Cl	7.5	8		3.75	92
Calcined Mg–Fe–Cl	7.5	7	3.35		92
Mg–Fe–Cl	750	7	286.9	331.1	93
Calcined poly(Mg–Al) LDH	50	8		1.73	96
Calcined poly(Mg–Fe) LDH	50	8		1.64	96
Calcined Mg–Fe–Zr LDH/Fe3O4	200	3		188.2	32