Preparation, characterization and application of synthesized thiourea formaldehyde-calcium alginate in removing of Reactive black 5

Thiourea formaldehyde calcium alginate (TFCA) composite was successfully synthesized and used for removal of Reactive black 5 dye. The synthesized composite was applied and characterized by Fourier transform infrared spectrometer (FT-IR) spectra, scanning electron microscope (SEM)/EDS, Energy Dispersive X-Ray Analysis (EDX) and X-ray diffraction (XRD). SEM and EDX analyses confirm the homogeneity of the sorbent in term of composition. Batch adsorption experiments were performed to evaluate the adsorption conditions such as pH value, dye concentration, contact time, temperature and sorbent dose, as well as the ionic strength effect. Experimental data have been modeled by using Langmuir, Freundlich, Dubinin Radushkevich (D–R) and Temkin isotherms. Kinetic adsorption data modeled using PFORE, PSORE, Morris Weber and Elovich. Thermodynamic parameters (ΔG, ΔH, and ΔS) were evaluated for the dye adsorbent systems. These data indicated an exothermic spontaneous adsorption process that kinetically followed the pseudo-second-order adsorption process, Removal of Reactive Black 5 (RB5) dye from aqueous solution the results showed that the maximum adsorption capacity was 0.02 mmol. g-1, observed at pH 1 and temperature 25 ◦C. Equilibrium adsorption was achieved within 60 min.The accepted manuscript in pdf format is listed with the files at the bottom of this page. The presentation of the authors' names and (or) special characters in the title of the manuscript may differ slightly between what is listed on this page and what is listed in the pdf file of the accepted manuscript; that in the pdf file of the accepted manuscript is what was submitted by the author