Anion-Exchange Resins for C.I. Direct Blue 71 Removal from Aqueous Solutions and Wastewaters: Effects of Basicity and Matrix Composition and Structure

Abstract

In this work, eight ion exchangers with different functional groups and various polymeric matrixes (Amberlite IRA 67, Lewatit MonoPlus MP 62, Lewatit MonoPlus MP 64, Amberlite IRA 458, Amberlite IRA 900, Amberlite IRA 958, Lewatit MonoPlus MP 500, and Lewatit MonoPlus M 500) were used for the removal of C.I. Direct Blue 71 textile dye from aqueous solutions and wastewaters. For comparison, the sorption parameters of the low-cost sorbent prepared from orange peel were also measured. The sorption process of the dye was investigated by the column and batch sorption methods. High values of the monolayer sorption capacity (1630.6 mg/g), working ion-exchange capacity (13 mg/mL), and total ion-exchange capacity (128 mg/mL) were obtained for the macroporous anion exchanger Amberlite IRA 958 with quaternary ammonium functionalities. The amount of C.I. Direct Blue 71 retained by Amberlite IRA 958 was found to be dependent on the initial dye concentration and the phase contact time. The solution pH and salt (NaCl and Na2SO4) and anionic surfactant (SDS) concentrations do not influence the anion-exchange resin performance, whereas the presence of the cationic surfactant (CTAB) decreased the dye sorption on Amberlite IRA 958 significantly. Desorption of the dye occurred with 85.4% yield using 1 M NaOH in methanol. The results obtained in the purification of raw wastewaters confirmed that Amberlite IRA 958 can be a promising adsorbent for the removal of textile dyes from wastewaters of different types.

Anion Exchange Resins as Effective Sorbents for Removal of Acid, Reactive, and Direct Dyes from Textile Wastewaters

“…Taking into account high capacity and selectivity of ion exchange resins for different dyes, they seem to be proper materials for dyes sorption from textile effluents. Applicability of the anion exchange resins in the removal of acid, reactive, direct dyes widely used in the textile industry, from aqueous solutions and wastewaters, was confirmed in some papers [2,15,20,23,[25][26][27][28].…”

“…Reactive Black 5 and C.I. Direct Blue 71 on the commercially available anion exchangers are summarized and discussed based on the data presented in papers [2,15,20,23,[25][26][27][28][29][30][31].…”

“…The ion pairs are formed between these groups. Such interactions were revealed during the analysis of the ATR FT-IR spectra of the dye loaded anion exchangers, the absorption peaks at 1170-1047 nm and 1019 nm were attributed to the presence of -SO 3 -and -S=O groups [20]. In the FT-IR spectrum of the weakly basic anion exchanger Purolite A 847 with loaded azo-(Lanasyn Navy M-DNL) and phthalocyanine (C.I.…”

“…Removal of C.I. Direct Blue 71 from the systems containing 100 mg/L of dye and 1-25 g/L of NaCl and Na 2 SO 4 on the weakly, intermediate and strongly basic anion exchangers was broadly described in the papers [20] and [25]. For the intermediate (Amberlite IRA 478RF) and strongly basic (Amberlite IRA 958 and IRA 458) anion exchangers of the polyacrylic matrix, the presence of NaCl and Na 2 SO 4 in the whole examined concentration range of 1-25 g/L did not influence the adsorption capacities.…”

Adsorption of rose Bengal dye from aqueous solution by amberlite Ira-938 resin: kinetics, isotherms, and thermodynamic studies

“…To remove the dyes from wastewater, various conventional treatments such as coagulation, biological treatment, membrane technology, oxidation, adsorption, and photodegradation have been utilized, but adsorption process is one of the most effective and inexpensive procedure [13][14][15][16][17][18][19][20][21][22][23]. Several authors have also used ion exchange resins for the removal of dyes, metals, and other types of inorganic/organic pollutants [24][25][26][27][28][29][30]. The retention of Methyl Green and Malachite Green dyes using amberlite XAD-4 and XAD-2 has *Corresponding author.…”