Data on Fe (II) biosorption onto Sargassum hystrix algae obtained from the Persian Gulf in Bushehr Port, Iran

In this article, we used Sargassum hystrix algae as biosorbent for removal of Fe (II) from aqueous solutions that was collected along the Persian Gulf coastline, Bushehr, Iran. The concentration level of remaining Fe (II) in the samples was measured by using flame atomic absorption spectrometry (FAAS, Varian AA240, Australia). The isotherms, kinetics and modeling data of Fe (II) biosorption onto Sargassum hystrix were also presented.

In this article, we used Sargassum hystrix algae as biosorbent for removal of Fe (II) from aqueous solutions that was collected along the Persian Gulf coastline, Bushehr, Iran. The concentration level of remaining Fe (II) in the samples was measured by using flame atomic absorption spectrometry (FAAS, Varian AA240, Australia). The isotherms, kinetics and modeling data of Fe (II) biosorption onto Sargassum hystrix were also presented. &

Value of the data
The data of Sargassum hystrix algae for Fe (II) removal from aqueous solution was described. Data show that brown algae can be used as low cost biosorbent for removal of other metals from aqueous solution.
Data of this study can be used to design the bisorption experiments for removal of heavy metals.

Data
In this article the data in Table 1 present the isotherm and kinetic equations that used for description of experiments. Calculated values of isotherm and kinetic model parameters were reported in Table 2.  Freundlich Log (q e ) ¼ Log (K f ) þLog C e log q e vs log C e First-order kinetic Log (q e À q t ) ¼ log q e À K1;ads 2:303 t log (q e À q t ) vs t Second-order kinetic q e is the mass of Fe (II) biosorbed per unit weight of the biosorbent (mg/g), q max is the monolayer biosorption capacity, b is the Langmuir constant related to the free energy of biosorption equilibrium concentration level of Fe (II) in solution (mg/L) after biosorption and K f is the Freundlich capacity factor and a measure of biosorption capacity, 1/n is the equilibrium concentration level of Fe (II) in solution (mg/L) after biosorption, q t (mg/g) is the amount of biosorbed Fe (II) on algae at equilibrium and time t (min), C is the intercept and k 1 (1/min), k 2 (g/mg min) and k d (mg/g min 0.5 ) are the rate constants of pseudo-first order, pseudo second order kinetic and intraparticle diffusion model.

Experimental design, materials and methods
The brown algae Sargassum hystrix was used as biosorbent, was obtained along the northern part of the Persian Gulf in Bushehr seaside region. The collected algae was washed 3 times by urban water and 2 times by deionized water to eliminate dirt and contaminants, next dried in oven (at 105°C for 24 h) and eventually powdered and sieved by using a screen (Mesh no: 25). FeCl 3 .6H 2 O was used for preparing Fe (II) solutions. Fe (II) solutions were prepared at 5, 10, 20, 50, and 100 mg/L concentration from a stock solution (1000 mg/L). At each experiment, 100 ml of Fe (II) solution with special initial concentration of Fe (II) was agitated at 120 rpm. The effects of 6 contact times (5, 10, 25, 45, 60, and 120 min), 5 initial concentrations of Fe (II) (5-100 mg/L) and different dosage of biosorbent (0.1-10 g/L) were studied in the batch runs. Flame atomic absorption spectrometry (FAAS, Varian AA240, Australia) [1][2][3][4] was used to investigate the remaining concentration of Fe  (II) in the aqueous solution after each run. Following equation [5,6] was applied to calculate the removal efficacy during experiments.
where R is the removal efficacy, C i and C e are the levels of Fe (II) before and after the experiment in any time (mg/L).