optimization and kinetic evaluation of acid blue 193 degradation by uv/peroxydisulfate oxidation using response surface methodology

نویسندگان

mojtaba ahmadi

razi nuiversity m. hamed ardakani

razi university a.a zinati zadeh

razi university

چکیده

the optimization of process conditions for the degradation of acid blue 193 by uv/peroxydisulfate was investigated using response surface methodology (rsm). the effects of four parameters namely initial k2s2o8 concentration, uv irradiation, temperature, and initial dye concentration on two process responses, color removal and the rate constants of the first-order kinetic equations, were investigated using a second-order polynomial multiple regression model. the analysis of variance (anova) explained a high determination coefficient (r2) value of 0.927-0.967, which ensures a good fit of the first-order regression model with the experimental data. the central composite design (ccd) was used to optimize the process conditions, which showed that an initial k2s2o8 concentration of 5 mm, uv irradiation of 250 w, temperature of 50 °c, and the initial dye concentration of 40 mg/l were the best conditions. under optimum conditions, the maximum color removal from the wastewater and the rate constants of the first-order kinetic equation were 100% and 0.086 min--1, respectively.

برای دانلود باید عضویت طلایی داشته باشید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Optimization and kinetic evaluation of acid blue 193 degradation by UV/peroxydisulfate oxidation using response surface methodology

The optimization of process conditions for the degradation of Acid Blue 193 by UV/peroxydisulfate was investigated using response surface methodology (RSM). The effects of four parameters namely initial K2S2O8 concentration, UV irradiation, temperature, and initial dye concentration on two process responses, color removal and the rate constants of the first-order kinetic equations, were investi...

متن کامل

Optimization of Acid Blue 113 Adsorption from Aqueous Solutions by Natural Bentonite Using Response Surface Model: Isotherm and Kinetic Study

Background & objectives: Dyes are one of the main environmental pollutants of textile industrial wastewater which are toxic, carcinogenic, mutagenic, and non-biodegradable. Therefore, in this study, Response Surface Methodology (RSM) was used to investigate the operational parameters and determine the optimum conditions for the removal of acid blue 113 in the presence of bentonite. Methods: The...

متن کامل

Optimization and Modeling of Microcystin-LR Degradation by TiO2 Photocatalyst Using Response Surface Methodology

Introduction: Microcystin-leucine arginine (MC-LR) is a toxin with harmful effects on the liver, kidney, heart, and gastrointestinal tract. So, effective removal of MC-LR from water resources is of great importance. The aim of this study was to remove microcystin-LR (MC-LR) from aqueous solution by Titanium Dioxide (TiO2). Materials and Methods: In the present study, TiO2, as a semiconductor, ...

متن کامل

Preparation, characterization and photocatalytic degradation of methylene blue by Fe3+ doped TiO2 supported on natural zeolite using response surface methodology

The photocatalytic degradation of methylene blue was investigated with TiO2 and Fe2O3 nanoparticles supported on natural zeolite. The synthesized photocatalyst was characterized by XRD, XRF, FT-IR, EDX, FE-SEM, and BET analyses. The results of XRD, FT-IR, and EDX confirmed the successful loading of Fe3+ doped TiO2 nanoparticles on natural zeolite. Further, the FE-SEM results confirmed the depos...

متن کامل

Optimization of photo-degradation of direct blue 258 using nano Titanium Oxide with response surface method

The photodegradation of Direct Blue 258, a member of the group of azo dyes which are commonly used in the various branches of the industry, was studied. The photostability of this dye was not previously surveyed. Photocatalytic degradation method was evaluated. The both light source include solar simulated (UV 400 W lamp) and sun light (E= 400 W/m2) and titanium dioxide nanoparticles were used ...

متن کامل

Optimization of photo-degradation of direct blue 258 using nano Titanium Oxide with response surface method

The photodegradation of Direct Blue 258, a member of the group of azo dyes which are commonly used in the various branches of the industry, was studied. The photostability of this dye was not previously surveyed. Photocatalytic degradation method was evaluated. The both light source include solar simulated (UV 400 W lamp) and sun light (E= 400 W/m2) and titanium dioxide nanoparticles were used ...

متن کامل

منابع من

با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید


عنوان ژورنال:
advances in environmental technology

جلد ۱، شماره ۲، صفحات ۵۹-۶۸

میزبانی شده توسط پلتفرم ابری doprax.com

copyright © 2015-2023