Preparation of zeolite nanorods by corona discharge plasma for degradation of phenazopyridine by heterogeneous sono-Fenton-like process

Abstract

The plasma-modified clinoptilolite (PMC) nanorods were prepared from natural clinoptilolite (NC) utilizing environmentally-friendly corona discharge plasma. The PMC and NC were characterized by XRD, FT-IR, SEM, EDX, XPS and BET, which confirmed the nanocatalyst formation. The catalytic performance of the PMC in the heterogeneous sono-Fenton-like process was greater than the NC for treatment of phenazopyridine (PhP). The desired amounts were obtained for experimental parameters including initial pH (5), PMC dosage (2g/L), K2S2O8 concentration (2mmol/L), ultrasonic power (300W) and PhP concentration (10mg/L). Reactive oxygen species scavengers decreased the removal efficiency of the PhP. The treatment process followed pseudo-first order kinetic and seven degradation intermediates were identified by the GC-MS technique.

Two‐stage phase separation of cellulose acetate membranes modified with plasma‐treated natural zeolite: Response surface modeling

“…12 Despite extensive researches on the zeolite-modified polymeric membranes, [13][14][15][16][17] there are a few reports on the modification of CA membranes by zeolites. Ji et al 18,19 prepared a CA/zeolite composite fiber and investigated its adsorption behavior for copper and nickel ions in aqueous solution.…”

Magnetic nanocomposites decorated on multiwalled carbon nanotube for removal of Maxilon Blue 5G using the sono-Fenton method

“…In this case, the addition of the nano-adsorbent may have a cleaning effect on the %OH − radicals, resulting in a reduction of the Maxilon Blue 5G removal efficiency in the solution medium 15 . Another reason is that in sonocatalytic heterogeneous systems, excessive screening quantification of ultrasonic waves by the magnetic nano-adsorbent particle prevents the same amount of ultrasonic energy from being absorbed 39 . The highest removing amount of the Maxilon Blue 5G by the using of Fe 3 O 4 @MWCNT was also detected, as seen in Fig.…”

Low frequency ultrasonic‐assisted Fenton oxidation of textile wastewater: process optimization and electrical energy evaluation

“…In the light of this, the experimental data was fitted against a series of popular models to find the most suitable model. From the previous studies (Babuponnusami and Muthukumar, 2012;Huang et al, 2012;Khataee et al, 2016;Hu et al, 2018), the pseudo-first order is the most probable kinetic model for degradation of dyes in Fenton-like oxidation reaction. For instance, Babuponnusami and Muthukumar (2012), observed pseudo-first order kinetics for phenol degradation and obtained rate constant values of 0.0067, 0.0286 and 0.0683 min −1 for Fenton, Electro-Fenton and Sono-Electro-Fenton processes, respectively.…”