Heterogeneous electro-Fenton treatment of chemotherapeutic drug busulfan using magnetic nanocomposites as catalyst.

The rapid and efficient mineralization of the chemotherapeutic drug busulfan (BSF) as the target pollutant has been investigated for the first time by three different heterogeneous EF systems that were constructed to ensure the continuous electro-generation of HO and OH consisting of: i) a multifunctional carbon felt (CF) based cathode composed of reduced graphene oxide (rGO), iron oxide nanoparticles and carbon black (CB) (rGO-FeO/CB@CF), ii) rGO modified cathode (rGO/CB@CF) and rGO supported FeO (rGO-FeO) catalyst and iii) rGO modified cathode (rGO/CB@CF) and multi walled carbon nanotube supported FeO (MWCNT-FeO) catalyst. The effects of main variables, including the catalyst amount, applied current and initial pH were investigated. Based on the results, HO was produced by oxygen reduction reaction (ORR) on the liquid-solid interface of both fabricated cathodes.

Application of response surface methodology as a new PID tuning method in an electrocoagulation process control case.

In this work the application of response surface methodology (RSM) to proportional-integral-derivative (PID) controller parameter tuning for electrocoagulation (EC) treatment of pulp and paper mill wastewater was researched. Dynamic data for two controlled variables (pH and electrical conductivity) were obtained under pseudo random binary sequence (PRBS) input signals applied to manipulated variables (acid and supporting electrolyte flow rates). Third order plus time delay model parameters were evaluated through System Identification Toolbox™ in MATLAB.