Oxidized jute as a valuable adsorbent for Congo Red from an aqueous solution

Abstract

The raw jute fabric was oxidized with 0.2% or 0.4% NaIO4 for 60 or 120 min to obtain valuable adsorbents for the textile dye Congo Red (CR). Batch adsorption experiments were carried out as a function of solution pH, contact time, initial CR concentration, and temperature. At an initial CR concentration of 25 mg/L, the raw jute possessed the lowest adsorption due to the lowest availability and content of carboxyl and aldehyde groups capable of binding dye. The fabrics oxidized for 60 min with 0.2% NaIO4 and 120 min with 0.4% NaIO4 reached equilibrium adsorption after 240 and 330 min, respectively. The adsorption of CR onto studied fabrics followed the pseudo-second-order model indicating that the chemisorption process is primarily represented. Within the studied range of CR concentrations (25–100 mg/L), its adsorption onto fabric oxidized for 120 min with 0.4% NaIO4 obeys the Langmuir isotherm model (i.e. adsorption occurs at specific, energetically equivalent adsorbent sites with monolayer coverage of CR over a homogeneous surface), wherein the calculated maximal adsorption capacity is 12.863 mg/g. A thermodynamic study revealed the spontaneous and endothermic character of CR adsorption onto jute fabric. Based on the recorded ATR-FTIR spectra before and after CR adsorption, it is suggested that repulsion, hydrogen bonds, and π-π stacking interactions are involved in the binding of CR onto jute fabrics.

Recovering the Soybean Hulls after Peroxidase Extraction and Their Application as Adsorbent for Metal Ions and Dyes

“…At the system equilibrium, the obtained positive values of Δ S 0 imply an increase of randomness at the solid-solution interface, indicating that the adsorption of all considered pollutants is an entropy-driven process [61]. The positive Δ S 0 in a combination with the negative Δ G 0 suggest that their adsorption onto SH-PO1 is feasible and spontaneous [16]. Furthermore, the process is of endothermic character since the parameter Δ H 0 is positive.…”

“…Compared to conventional adsorbents (i.e., activated carbons, ionexchange resins, and inorganic materials such as alumina, silica gel, and zeolites), green waste-derived adsorbents are economically viable (their cost-potential makes them competitive) and have proven satisfactory adsorption capacities toward heavy metals and dyes. The most studied green waste-derived adsorbents are sugar beet shreds [13], fibers [14][15][16][17], rice husk [18], wood-based adsorbents [2,[19][20][21], potato peels [22,23], and other cellulose-based adsorbents [7]. Although green waste-derived materials are intensively studied as adsorbents for heavy metal ions and dyes, the exploration of new eco-friendly, biodegradable, low-cost, and abundant adsorbents that have low/no negative impact on the environment remains primary focus of investigation among researchers.…”

“…Among different classes of synthetic dyes, azo dyes, like AB 225, are one of the most important synthetic dyes produced worldwide [29]. Their degradation byproducts have a toxic and mutagenic impact on aquatic organisms [16]. Furthermore, the second major synthetic dye class is anthraquinone dyes such as RY 39 which are used for dyeing wool, cotton, silk, and polyamide.…”

A step towards tuning the jute fiber structure and properties by employing sodium periodate oxidation and coating with alginate

“…To tune the structure and properties of jute, previously washed (with distilled water at boiling temperature for 30 min) and dried, raw jute fabric (denoted as J) was oxidized with NaIO 4 aqueous solution according to the procedure given by Ivanovska et al [23]. Briefly, J was immersed in 0.2 or 0.4 % NaIO 4 aqueous solution (material-to-liquid ratio of 1:50) prepared by dissolving NaIO 4 in an acetic buffer having a pH value of 4.00.…”

Physicochemical Interaction of Microstructured Drumsticks withSynthetic Dye: The Tailoring of Surface Phenomenon in Technology

“…Table 3 shows the qmax values for the adsorption of CR by various low-cost adsorbents. ln C e Acid-treated pine cone powder 40.19 [25] Neem leaf powder 41.20 [16] Water hyacinth 53.76 [17] Papaya seed powder 216.9 [26] Vernonia amygdalina leaf powder 57.47 [27] Polypyrrole modified Chinese yam peel 86.66 [28] Oxidized jute 12.86 [29] Rambutan peel 6.24 [30] Wheat residue cellulose 18.85 [31] Palm leaf-activated carbon 52.1 [32] Vermicompost 23.25 [33] Orange lemon peel activated carbon 38 [34] Lignin-based magnetic nanoparticles 234.27 [35] Black tea wastes 3.367 [36] Acid-treated durian peels 107.52 [37] 3.4. Adsorption Kinetics…”