This study focuses on development, characterization and validation of an artificial neural network (ANN) model for prediction of advanced oxidation of organics in water matrix. The different ANNs, based on multilayer perceptron (MLP) and radial basis function (RBF) methodologies, have been applied for modeling of the behavior of complex system; zero-valent iron activated persulfate oxidation (F...

1,4-dioxane is an emerging contaminant that was used as a corrosion inhibitor with chlorinated solvents. Metal-activated persulfate can degrade dioxane but reaction kinetics have typically been characterized by a rapid decrease during the first 30 min followed by either a slower decrease or no further change (i.e., plateau). Our objective was to identify the factors responsible for this plateau...

BACKGROUND Persulfate salts have been identified as a cause of occupational asthma (OA). The aim of the present study was to describe the clinical characteristics, diagnostic testing results, and follow-up of eight patients with OA that was triggered by these chemical compounds. METHODS Eight patients with OA due to exposure to persulfate salts were studied. Immunologic, lung function, and sp...

Many different causative agents have been ascribed to occupational asthma (OA). Persulfate salts are low molecular weight chemical compounds widely used in different manufacturing processes, particularly in the cosmetics industry. Persulfate-induced asthma may represent 4% of all OA cases, and although the first cases due to persulfate salts were described approximately 30 years ago, the preval...

This paper aims to investigate the promotion of persulfate (PS) activation by ZnO in discharge plasma systems for degradation ofloxacin (OFX). Scanning electron microscopy and transmission showed that nanoparticles were successfully prepared a hydrothermal method. With an increase PS dosage, removal efficiency OFX first increased then decreased. similar trend. Under optimum 595 mg/L dosage 295 ...

It has become the new focus in the field of water treatment to deal with the difficult degradable organic pollutants using the transition metal and the transition metal ion. This paper examined a new activator of Fe in persulfate (K2S2O8) activation based on strong oxidizer of sulfate radicals (SO·-) for catalytic oxidation of phenol. Discuss the reaction time, activator dosing amount, K2S2O8 d...

Penicillin G (PG) is one of the most widely consumed antibiotics around the world. Release of PG in environment may lead to contamination of water resources. The aim of the present work is to assess feasibility of applying UV-activated persulfate process in removal of PG from aquatic environments. The study examined the effect of pH (3-11), persulfate initial concentration (0.5-3 mM), reaction ...

This study constructed a microbial fuel cell (MFC) using Fe(II)-EDTA catalyzed persulfate as the cathode solutions to decolorize Orange G (OG) and harvest electricity simultaneously. Chelated Fe(2+) could activate persulfate to generate sulfate free radicals (SO(4)(-)) which with high oxidation potential (E(0)=2.6 V) can degrade azo dyes. The influence of some important factors such as pH value...

The aim of this study was to treat wastewater from washing, cutting or crushing intermediate bulk containers (IBCs), steel drums and plastic drums, using the sulfate radical-based oxidation method. In study, it planned make suitable for activated sludge treatment by applying neutralization after a process. Samples were taken industry three times these processes. To determine optimum conditions ...