Adsorption of Arsenate from Aqueous Solution onto Modified Vietnamese Bentonite

Table 2

pH of As(V) solution before and after the arsenate absorption onto Fe-B (C_o(As) = 12.98 mg/L) and Al-B (C_o(As) = 16.84 mg/L) (T = 303 K, m = 0.05 g).

pH before the arsenate absorption	2.0	3.0	4.0	5.0	6.0	7.0	8.0	9.0
pH after the arsenate absorption onto Fe-B	2.0	2.9	3.3	—	4.0	4.8	7.0	7.2
pH after the arsenate absorption onto Al-B	2.7	3.7	5.4	5.8	6.4	7.9	8.1	9.4