Synthetic wastewaters treatment by electrocoagulation to remove XXXX nanoparticles produced by different routes.

@entity4958 @entity575 @entity8951 @entity7292 @entity9954 @entity3736 @entity413
UNASSIGNED: Nanoscience is a field that has stood out in recent years. The accurate long-term health and environmental risks associated with these emerging materials are unknown. Therefore, this work investigated how to eliminate @entity575 nanoparticles (AgNPs) from synthetic effluents by electrocoagulation (EC) due to the widespread use of this type of nanoparticle (NP) in industry and its potential inhibition power over microorganisms responsible for biological treatment in effluent treatment plants. Synthesized AgNPs were studied via four different routes by chemical reduction in aqueous solutions to simulate the chemical variations of a hypothetical industrial effluent, and efficiency conditions of the EC treatment were determined. All routes used @entity7292 as the source of @entity575 ions, and two synthesis routes were studied with @entity4958 as a stabilizer. In route I, @entity4958 functioned simultaneously as the reducing agent and stabilizing agent, whereas route II used @entity8951 as a reducing agent. Route III used @entity413 as the reducing agent and @entity9954 as the stabilizer; route IV used @entity9954 as the stabilizing agent and @entity8951 as the reducing agent. The efficiency of the EC process of the different synthesized solutions was studied. For route I, after 85  min of treatment, a significant decrease in the plasmon resonance peak of the sample was observed, which reflects the efficiency in the mass reduction of AgNPs in the solution by 98.6%. In route II, after 12  min of EC, the absorbance results reached the detection limit of the measurement instrument, which indicates a minimum reduction of 99.9% of AgNPs in the solution. During the 4  min of treatment in route III, the absorbance intensities again reached the detection limit, which indicates a minimum reduction of 99.8%. In route IV, after 10  min of treatment, a minimum AgNP reduction of 99.9% was observed. Based on these results, it was possible to verify that the solutions containing @entity3736 considerably increased the necessary times required to eliminate AgNPs from the synthesized effluent, whereas solutions free of this reagent showed better results on floc formation and, therefore, are best for the treatment. The elimination of AgNPs from effluents by EC proved effective for the studied routes.
