Degradation of 4-chlorophenol from aqueous solution using ultrasound/persulphate: prediction by RSM

International Journal of Environmental & Analytical Chemistry, Journal Year: 2020, Volume and Issue: 102(17), P. 6030 - 6040

Published: Aug. 25, 2020

Chlorophenol compounds are considered as toxic and harmful effects caused by them have been proven for human living organisms. This study is aimed to reduce 4-chlorophenol from aquatic solution using ultrasound/persulphate technique. Response surface method (RSM) applied find out the optimum conditions removal. The independent variables pH, contact time, concentration, persulphate concentration ultrasound power. A statistical analysis of variance (ANOVA) conducted optimise factors obtained experimental data. second-order model developed a great predict reduction efficiency. found at pH = 3, reaction time 65 min, 15 mg/l, 125 mg/L power 150 W. In terms removal efficiency R2, Adj. R2 coefficient (CV) be 0.95, 0.85 8.9, respectively. According results (A), (B), initial (C), (D), (E), square (A2), (B2), (C2), (D2), (E2) interaction AB, AC, AD, BC, BD, CD, AE,and DE effective factors. extra experiments optimal indicates 88.92% rate which confirms agreement between predicted (90.88%)

Language: Английский

---

Removal of Acid Red 27, Reactive Black 5 and Acid Green 16 from Aqueous Solutions using Potassium Ferrate(VI)

Fibres and Textiles in Eastern Europe, Journal Year: 2019, Volume and Issue: 27(4(136)), P. 71 - 75

Published: July 8, 2019

The article presents the possibility of using potassium ferrate(VI) (K2FeO4) to remove dyes (Acid Red 27, Reactive Black 5, Acid Green 16) belonging single azo, double azo and triarylmethane classes from aqueous solutions with an initial concentration 100 mg/l (Chemical Oxygen Demand (COD) values for AR27, RB5 AG16 sulutions were 172, 156 198 mg O2/l, respectively). For most favorable oxidation parameters AR27 (pH 7, K2FeO4 concentration, 180 240 mg/l, respectively, reaction time 10 min), visual discolouration investigated a decrease in COD 83.7% 81.4%, achieved. In case AG 16 dye, conditions process 3, K2FeO4, 300 15 value 83.8% also obtained. probable reasons higher resistance compared explained, based on analysis structure type bonds present molecule 16.

Language: Английский

---

Taguchi L₁₆ (4⁴) orthogonal array-based study and thermodynamics analysis for electro-Fenton process treatment of textile industrial dye

Chemical Product and Process Modeling, Journal Year: 2022, Volume and Issue: 18(5), P. 741 - 760

Published: Dec. 5, 2022

Abstract Reactive orange 16 (RO16) is the most widely used azo dye in Textile industry. Complex aromatic structures and resistivity to biological decay caused pollutants incompletely treated by conventional oxidative methods. The current study presents electro-Fenton-based advanced oxidation treatment of RO16 process optimization Taguchi-based design experiment (DOE). Using a 500 mL volume lab-scale experimental setup, was first studied for principal operational parameters (initial concentration ( q ); [H 2 O ]/[Fe +2 ] R density ρ temperature T )) effect on decolourization D ) COD removal C ). Then, means L (4 4 orthogonal array (OA) formation, standard mean signal-to-noise (S/N) ratio, optimized response variables. result showed at = 100 mg/L, 100, 8 mA/cm , 32 °C; with as 90.023 84.344%, respectively. It found that affects most, followed initial concentration, i.e., > . Also, analysis variance (ANOVA), model equations were developed its accuracy verified results. At conditions, order rate constants k from batch Additionally, thermodynamic (Δ H e Δ S G b also calculated nature heat-energy involved degradation. results thermodynamically feasible, endothermic, non-spontaneous lower energy barrier E A 46.7 kJ mol −1

Language: Английский

---

Textile Wastewater Treatment by Electrochemical Oxidation—Response Surface Methodology

Springer eBooks, Journal Year: 2019, Volume and Issue: unknown, P. 251 - 263

Published: Jan. 1, 2019

Language: Английский

---

Efficiency of zinc stannate/multi-walled carbon nanotubes as nanocomposite photocatalyst in removal of methylene blue from aqueous solution

Desalination and Water Treatment, Journal Year: 2019, Volume and Issue: 164, P. 339 - 345

Published: Oct. 1, 2019

In the present study, use of synthesized zinc stannate/multi-walled carbon nanotubes (ZSC) nanocomposite was investigated as photocatalyst in removal methylene blue (MB) under visible light.The ZSC by hydrothermal method.The structural properties were X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FT-IR), scanning electron microscopy (SEM), and UV-visible diffuse reflectance (DRS).The optimal values parameters for dye follows: 130 mg•L -1 dosage, 10 concentration, pH = 9, cm distance radiation source.In this condition, degree 94%.The photocatalytic followed pseudo-first-order kinetic Langmuir-Hinshelwood models.Furthermore, equilibrium constant adsorption (K ads )and rate surface reaction (k c ) obtained 0.91 L•mg 0.84 •min , respectively.

Language: Английский

---

Treatment of Reactive Orange 16 Dye-Bearing Wastewater by Electro-Fenton Process with Stainless-Steel Electrodes: Statistical Optimization and Operational Analysis

Letters in Organic Chemistry, Journal Year: 2024, Volume and Issue: 21(7), P. 630 - 644

Published: Feb. 1, 2024

Abstract: In the current work, Electro-Fenton (EF) based Reactive Orange 16 (RO16) dye treatment was studied and compared with central composite (CC) Taguchi design (TD) statistical optimization tools. Color removal (RC) COD decay (RCOD) were chosen responses for effect of pH (A), electrolysis time (B), initial concentration (C), density (D). The facecentred CC L16 orthogonal array used in experimental procedures. At optimal conditions, coefficient determination (R2) values 0.99 0.97 TD suggest significance good model agreement. results ANOVA Prob. > F supported model’s successful data fitting. method found as an appropriate methodology parameter percentage contributions fewer runs. Moreover, S/N ratio charts proved to be a replacement. most important factors EF process. A higher biodegradability (BOD5/COD) minimum iron (0.45 mg/L) effluent sludge demonstrated environmental disposal suitability. last, various inhibitors/scavengers (SO4 −2, PO4 −3, EDTA, etc.) on process performance also carried out.

Language: Английский

---

Degradation of Reactive Black 5 by potassium ferrate(VI)

Journal of The Korean Society of Water and Wastewater, Journal Year: 2024, Volume and Issue: 38(1), P. 17 - 27

Published: Feb. 28, 2024

Language: Английский

---

Strategic Optimization of PFC Coagulation for Saline Water Pre-treatment: Enhancing RO Filtration Efficiency in the Mekong Delta

IOP Conference Series Earth and Environmental Science, Journal Year: 2024, Volume and Issue: 1409(1), P. 012013 - 012013

Published: Nov. 1, 2024

Abstract This study critically evaluates the application of Poly Ferric Chloride (PFC) as a pre-treatment coagulant in desalination, particularly for enhancing Reverse Osmosis (RO) filtration saline-affected Mekong Delta region. The research focuses on optimization PFC dosages and pH levels to maximize coagulation efficiency varying salinity conditions. Through an extensive series experiments, optimal 93.7% Total Suspended Solids (TSS) removal was achieved with dosage 0.7 ml at 11 5 ppt saline solution. However, increasing were found complicate this relationship, revealing nuanced interplay between dosage, pH, salinity. A critical observation decreasing effectiveness rose, indicating need escalating higher waters sustain effectiveness. significantly contributes understanding water desalination processes, highlighting compound’s role improving input quality RO systems extending membrane longevity. These findings are pivotal designing adaptive treatment strategies, ensuring sustainability purification salinity-vulnerable contexts.

Language: Английский

---

The performance of potassium ferrate for COD removal in AL-SAMAWAH refinery wastewataer

AIP conference proceedings, Journal Year: 2022, Volume and Issue: 2386, P. 080023 - 080023

Published: Jan. 1, 2022

Potassium ferrate (K2FeO4) by way of the green method has numerous prospects for wastewater conduct. In recent years, K2FeO4 is ahead care as having abilities aimed toward elimination different sorts pollutants in refinery (RRW) recovery. during this education, treatability competence remained on inspiration chemical oxygen demand real oily The five effects operating limits: concentration (25–100 ppm), oxidation time (2–10 min), pH (4-10), mixing rate (100–300 rpm),(25-100) and coagulation correspondingly their communicating belongings above-mentioned were deliberate means Box-Behnken design (BBD) response surface methodology (RSM). Statistical replicas industrialized then rummage-sale to reinforce circumstances. Removal percentage with a quantity more than 93.5% was got, from acceptable intended remediation organic compounds.

Language: Английский

---

The effectiveness and kinetics of petrolim refinery wastewater treatment using potassim ferrate as an oxidant and coagulant

AIP conference proceedings, Journal Year: 2022, Volume and Issue: 2450, P. 020044 - 020044

Published: Jan. 1, 2022

Language: Английский

---