Development of PANI/BN-based absorbents for water remediation

Abstract

In this research, novel PANI/BN-based absorbent was prepared by bonding polyaniline and bentonite for water remediation and their structures were characterized by scanning electron microscopy (SEM) and Fourier transform infrared spectroscopy (FTIR). The effect of pH, concentration of metal, and dosage amount on synthesized novel PANI/BN-based absorbent was investigated in detail. The result indicated that the PANI/BN-based absorbent has an excellent adsorption performance towards Cu, Pb, and Ni, and the highest binding capacity of 130 mg g 1 for Ni was obtained under normal conditions. The adsorption of PANI/BN absorbent was found to depend on pH when pH< 7.0, but the adsorption has been found independent from the ionic bond effect. The adsorption at optimum pH for Cu (pH 6) and Pb (pH 5) was observed as 85 mg g 1 and 105 mg g , respectively. The best results collected at those conditions of isotherm data and adsorption kinetics are represented by the Langmuir model and pseudo-second order equation, respectively. Thermodynamic results (ΔH> 0, ΔS> 0, ΔG< 0) showed that the adsorption process of Cu, Ni, and Pb is significantly increased by the synthesized novel PANI/BN-based absorbent. doi: 10.2166/wqrj.2019.048 om https://iwaponline.com/wqrj/article-pdf/54/4/290/602431/wqrjc0540290.pdf er 2019 Muhammad Arsalan Azka Awais Tingting Chen Qinglin Sheng (corresponding author) Jianbin Zheng College of Chemistry and Materials Science/Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of Ministry of Education/ Shaanxi Provincial Key Laboratory of Electroanalytical Chemistry, Northwest University, Xi’an, Shaanxi 710069, China E-mail: [email protected] Qinglin Sheng College of Food Science and Technology, Northwest University, Xi’an, Shaanxi 710069, China