Ion-crosslinked carboxymethyl cellulose/polyaniline bio-conducting interpenetrated polymer network: preparation, charact
- PDF / 2,800,643 Bytes
- 15 Pages / 595.276 x 790.866 pts Page_size
- 46 Downloads / 185 Views
ORIGINAL RESEARCH
Ion‑crosslinked carboxymethyl cellulose/polyaniline bio‑conducting interpenetrated polymer network: preparation, characterization and application for an efficient removal of Cr(VI) from aqueous solution Ali Olad1 · Maryam Bastanian1 · Soheil Aber2 · Hamid Zebhi1 Received: 17 May 2020 / Accepted: 4 October 2020 © Iran Polymer and Petrochemical Institute 2020
Abstract A simple, cheap, and environmentally friendly bio-conducting interpenetrated polymer blend network was prepared and introduced as a highly efficient system with suitable physical and mechanical properties for industrial removal of toxic Cr(VI) ions from aqueous solution. Carboxymethyl cellulose/polyaniline (CMC/PANI) interpenetrated network (IPN) blend was prepared by simple simultaneous ion-cross-linking of CMC and PANI chains using Al3+ cations. The CMC/PANI bio-conducting nanocomposite was characterized using X-ray diffraction (XRD), Fourier transform infrared (FTIR) spectroscopy, thermogravimetric analysis (TGA), and scanning electron microscopy equipped with an "energy dispersive X-ray spectroscopy" (SEM–EDX) technique. The CMC/PANI blend, ion-cross-linked by Al3+ cations, showed good stability and high surface area, proper for the removal of toxic Cr(VI) ions of the aqueous solution. Batch removal experiments were accomplished and the impression of effective variables including solution pH, initial concentration of Cr(VI) ions, contact time, and adsorbent dosage were checked and optimized. The outcome of our findings revealed that the removal of Cr(VI) ions by CMC/PANI nanocomposite IPN strongly depends on solution pH. The removal information was matched with the Langmuir adsorption isotherm model and the utmost monolayer adsorption capacity at pH 2 was 136.98 mg/g at 25 °C. The pseudo-second-order kinetics were operated and the thermodynamic parameters suggested spontaneous and exothermic nature of the adsorption process. Consequences indicated that CMC/PANI nanocomposite IPN could be an affective eco/environmentally friendly adsorbent for the removal of Cr(VI) ions from aqueous solutions. Keywords Nanocomposite · Polyaniline · Carboxymethyl cellulose · Hexavalent chromium · Adsorption
Introduction By world’s rapid expansion of economical and industrial activities, environmental pollution with hazardous heavy metals has become a serious universal issue today. Heavy metals have serious adverse results on human health and natural ecosystems [1]. Today, one of the most important * Ali Olad [email protected] 1
Polymer Composite Research Laboratory, Department of Applied Chemistry, Faculty of Chemistry, University of Tabriz, 5166‑616471 Tabriz, Iran
Environmental Protection Research Laboratory, Department of Applied Chemistry, Faculty of Chemistry, University of Tabriz, 5166‑616471 Tabriz, Iran
2
environmental issues is the treatment of industrial wastewaters, which includes heavy metals such as lead [2], copper [3], chromium [4], arsenic [5, 6], manganese, and uranium [7–9]. These metals enter the water and so
Data Loading...
