Experimental dataset on adsorption of Arsenic from aqueous solution using Chitosan extracted from shrimp waste; optimization by response surface methodology with central composite design

The aim of data was to evaluate the efficiency of chitosan extracted from shrimp waste for Arsenic adsorption and optimization by response surface methodology (RSM) with central composite design (CCD). The data showed that, with increasing contact time, the amount of adsorption increased and the optimal contact time was about 60 min. With increasing pH decreased adsorption, although this reduction was not significant. The optimum pH was obtained at 4.41. The average amount of adsorbent capacity was also about 1.3 mg/g. Overall, chitosan extracted from shrimp waste could be considered as an efficient material for the adsorption of Arsenic from aqueous solution.


a b s t r a c t
The aim of data was to evaluate the efficiency of chitosan extracted from shrimp waste for Arsenic adsorption and optimization by response surface methodology (RSM) with central composite design (CCD). The data showed that, with increasing contact time, the amount of adsorption increased and the optimal contact time was about 60 min. With increasing pH decreased adsorption, although this reduction was not significant. The optimum pH was obtained at 4.41. The average amount of adsorbent capacity was also about 1.3 mg/g. Overall, chitosan extracted from shrimp waste could be considered as an efficient material for the adsorption of Arsenic from aqueous solution.
& Value of the data The data showed that chitosan extracted from shrimp waste can be used as an inexpensive adsorbent for arsenic removal of water and wastewater.
This data offers a simple method for preparation of adsorbent from shrimp waste. This data article presents a user friendly-statistical method (RSM) to optimize Arsenic ions removal from water and wastewater using adsorption process.
This dataset will be beneficial for researchers who want to achieve good As(V) adsorption capacities with chitosan extracted from shrimp waste and Arsenic ions removal from industrial wastewaters.

Data
Experimental versus predicted adsorption efficiencies for arsenic removal are also illustrated in Tables 1 and 2. Variables constraints and predicted removal of optimization of arsenic adsorption by Chitosan presented in Table 3. Analysis of variance (ANOVA) for the fitted polynomial model for Arsenic adsorption by Chitosan reported in Table 4. Fig. 1(A-F) shows the Central composite design 3-D surface plots of the interaction effects of pH, contact time, arsenic concentration and adsorbent dosage chitosan extracted from shrimp waste on arsenic removal. The contour plots for the interaction effect of variables on the arsenic removal shows in Fig. 2A-F. Data on analyses showed that the data follow a Second-degree reaction. The data of the Pearson coefficient resulted from ANOVA showed that the contact time (3.58 Â 10 À 16 ) and the adsorbent dosage (3.16 Â 10 À 16 ) had a greater effect on the adsorption reaction.

Preparation of chitosan
Chitosan was used in the laboratory to extract shrimp waste. Shrimp waste was crushed after drying by the household grinder. Then demineralized in 1 N HCl is added at a ratio of 1 to 20 for 2 h with around 125 rpm was stirred [6,7]. The acid mixture of shrimp waste was placed at room    temperature for 24 h to remove its minerals, including calcium carbonate. The solution was then filtered with Whatman filter paper and dried at room temperature for 24 h [6,[8][9][10]. The powder obtained with a weight ratio of 1 to 20 was mixed with 1 N sodium hydroxide and placed on a stirrer at 60 rpm for 4 h to extract the chitin. Then, the obtained Chitin was mixed in sodium hydroxide 50% w/w for 2 h and placed on a stirrer at 100°C. Finally, the obtained materials were chitosan and used for arsenic adsorption experiments [6,[8][9][10][11][12].

Design of experiments
The entire batch adsorption experiments were carried out in 50 mL Erlenmeyer flask. The pH of the solutions were adjusted prior to the adsorption by using 0.1 M solutions of HCl and NaOH (16-19). The effects of operational parameters including pH (4, 5 and 6), contact time (30, 45, 60, 75 and 90 min), initial As (V) concentration (200, 300 and 400 mg/L), and adsorbent dosage (2, 3 and 4 mg/L) were assessed. The samples were stirred at 250 rpm for given contact times and after centrifugation at 2000 rpm, and passing through a 0.2 μm membrane filter, Then, the concentration of Arsenic was determined by ICP device [2,7]. The design of experiments was carried out using central composite design [9]. Then use the data and its analysis in software R (version R 3.5.1) to response surface methodology (RSM) factors affecting the optimum value was determined [1,3,5]. The complete design of the factor was made for four independent variables in three levels with 4 center points and 2 axial points. Experiments were performed in 2 blocks and repeated twice.