Activation of periodate by biocarbon-supported multiple modified nanoscale iron for the degradation of bisphenol A in high-temperature aqueous solution.

Abstract

Abstract Sulfided nanoscale iron-nickel bimetallic nanoparticles supported on biocarbon (S-(nFe0-Ni)/BC) were synthesized and used as a catalyst to activate periodate (PI) for the removal of Bisphenol A (BPA). Control experiment results suggest that the primary mechanism for BPA degradation is the oxidation of active species generated by activated PI, with little contribution from BPA adsorption or direct reduction by (S-(nFe0-Ni)/BC). The catalysts exhibit exceptional PI activation capability. Radical scavenging experiments confirmed that \(\text{I}{\text{O}}_{\text{3}}^{\text{•}}\) was the predominant active species in the system. Based on kinetic research, the decomposition of BPA in a [S-(nFe0-Ni)/BC]/PI system can be divided into two stages at the 5-minute mark using pseudo-first-order rate constants. Nonlinear dynamic fitting research, coupled with scavenging experiments, characterized the competitive degradation of pollutants during stage one (0–5 minutes). This degradation was primarily driven by \(\text{I}{\text{O}}_{\text{3}}^{\text{•}}\),\({}^{\text{1}}{\text{O}}_{\text{2}}\)and \({\bullet }\text{OH}\), with their contributions to BPA removal ranking in the order of \(\text{I}{\text{O}}_{\text{3}}^{\text{•}}\) >\({}^{\text{1}}{\text{O}}_{\text{2}}\)>\({\bullet }\text{OH}\).Competitive dynamics aligned with the ExpAssoc model. The contribution rates of various active species during stage two (5-120 minutes) were calculated. Based on XRD, XPS, FTIR, SEM-EDS analysis, and the results of other experiments, a plausible reaction mechanism in the system is proposed. It suggests that surface heterogeneous synergistic catalysis plays a pivotal role in PI activation, with each component of (S-(nFe0-Ni)/BC)demonstrating an essential function. The impact of several parameters, including the dosage of S-(nFe0-Ni)/BC, initial PI concentration, BPA concentration, pH, temperature, and the presence of coexisting anions, was also investigated. Therefore, this research offers a viable approach for the degradation of BPA in high-temperature wastewater.