. 2025 Jan 27;15(4):2684–2703. doi: 10.1039/d4ra08867k

Table 3. As adsorption efficiency of natural/modified clays.

Zeolites	Condition	Capacity			Reference
Zeolites	Condition	As^III	As^V	Total As	Reference
Natural zeolites	200 μg L⁻¹ of water treated with HCl	—	—	75%	133
Chabazite-phillipsite, clinoptilolite, and volcanic glass	Deionized water was used to prepare the solution spiked with 100 μg L⁻¹	—	—	40–78%	134
Clinoptilolite	Zeolites were washed with 2 M HCl and the pH was adjusted at 5, water solution contained 500 μg per L As	98%	98%	—	135
Cancrinite	Loading cancrinite alumina to water at pH range of 4.9–7.0	—	—	34.5 mg g⁻¹	136
Natural zeolite	Aqueous solution contained 5 mM As, zeolite loaded with lanthanum at pH range 2–8	—	95%	—	130
Zeolite P	Exchange of zeolite sodium with cerium(iii) at pH 3–10		23.42 mg g⁻¹		137
Raw zeolite	Iron-coated zeolite at a pH range of 3.0–10.0		0.68 mg g⁻¹		138
Zeolite	Coating zeolite with magnetic nanoparticle (γ-Fe₂O₃) at a pH value of 2.5		44 mg g⁻¹		139
Clinoptilolite-Ca	Modification of clinoptilolite-Ca zeolite with MnO₂		2.5 μg g⁻¹		131
Zeolite	Groundwater spiked with 2000 μg L⁻¹, magnetic nanoscale Fe–Mn binary oxides loaded zeolite at pH 7		99%		140
Clinoptilolite	Zeolite (clinoptilolite) supported mono- (Fe or Al) and bi-metallic (Fesingle bondAl) oxides at pH 5		3.86 mg g⁻¹		141