3.4. Reversibility of arsenic (V) adsorption in presence of chlorides and
phosphates
Arsenate desorption isotherms are displayed in Fig. 7 for all
adsorbents. Desorption isotherms were modeled using the Langmuir
model to determine the maximum adsorption capacities (Table 3). The
amount of As (V) desorbed with chlorides (MgCl2) decreases in the
following order: magnetite (24%)Nhematite (10%)NZVI (8%)Ngoethite
(4%). Arsenate desorption rate with phosphates (Na2HPO4), decreases in