antum Design. All the
measurements were performed on pow2.4. Adsorption experiments
Adsorption kinetics of arsenate (As(V)) on biochar/c-Fe2O3 samples
were examined by mixing 0.1 g of the adsorbent with 50 mL
arsenic solutions (50 mg/L As(V)) in 68 mL digestion vessels (Environmental
Express) at room temperature (22 ± 0.5 C). The vessels
were then shaken at 200 rpm in a mechanical shaker. At appropriate
time intervals, the vessels were withdrawn and the mixtures
were immediately filtered through 0.22 lm pore size nylon membrane
filters (GE cellulose nylon membrane). The As(V) concentrations
in the liquid phase samples were determined by using
inductively coupled plasma-atomic emission spectrometry (ICPAES,
Perkin-Elmer Plasma 3200). As(V) concentrations on the solid
phase were calculated based on the initial and final aqueous
concentrations.der forms of the samples