Highly efficient decomposition of Remazol Brilliant Blue R using tubular reactor coated with thin layer of PdO

Javaid, Rahat; Qazi, Umair Yaqub; Kawasaki, Shin-ichiro

doi:10.1016/j.jenvman.2016.05.075

Cited by 28 publications

(28 citation statements)

References 48 publications

(49 reference statements)

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“…We developed tubular reactors with inner walls coated with a thin metal catalyst layer and applied them to attain the efficient decomposition of synthetic dyes using high-pressure high-temperature water (HPHT-H 2 O) as a reaction medium [179,180]. Microtubular reactors offer advantages including a simple flow reaction system, excellent mass, and heat transfer properties, a large surface-to-volume ratio, and an enhanced reaction rate [181,182,183,184].…”

Section: Metal-coated Tubular Reactorsmentioning

confidence: 99%

“…The application of a tubular reactor with inner walls coated with a thin layer of the metal catalyst using HPHT-H 2 O as a reaction medium not only provides the advantages of catalytic wet oxidation but also of HPHT-H 2 O which ensures the complete decomposition of synthetic dyes in a short residence time. Here, we will summarize the experimental setup and the results of this novel approach for the complete decomposition of synthetic dyes using a catalytic tubular reactor and HPHT-H 2 O as reported in our published papers [179,180].…”

Section: Metal-coated Tubular Reactorsmentioning

confidence: 99%

“…The plating solution, after passing through the reactor, was analyzed by inductively coupled plasma-atomic emission spectroscopy (ICP-AES) to measure the amount of Pd deposited. Oxidation of the Pd surface to PdO was carried out by flowing air through the reactor at 750 °C for 2 h. This PdO-coated catalytic tubular reactor provided a remarkably high surface area-to-volume ratio of 0.8 × 10 4 m 2 m −3 [179,180]. Figure 2 presents the schematic diagram of the catalyst-coated tubular reactor (2a) and the experimental setup of the flow system (2b) [179].…”

Section: Metal-coated Tubular Reactorsmentioning

confidence: 99%

“…RBBR is one of the most important synthetic dyes frequently used in the textile industry and as a starting material in the production of polymeric dyes. Figure 3 is adapted from our published paper [180]. Figure 3a shows the schematic diagram of a tubular reactor coated with a thin layer of the metal catalyst.…”

Section: Metal-coated Tubular Reactorsmentioning

confidence: 99%

See 3 more Smart Citations

Catalytic Oxidation Process for the Degradation of Synthetic Dyes: An Overview

Javaid

Qazi

2019

IJERPH

Self Cite

275

101

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Dyes are used in various industries as coloring agents. The discharge of dyes, specifically synthetic dyes, in wastewater represents a serious environmental problem and causes public health concerns. The implementation of regulations for wastewater discharge has forced research towards either the development of new processes or the improvement of available techniques to attain efficient degradation of dyes. Catalytic oxidation is one of the advanced oxidation processes (AOPs), based on the active radicals produced during the reaction in the presence of a catalyst. This paper reviews the problems of dyes and hydroxyl radical-based oxidation processes, including Fenton’s process, non-iron metal catalysts, and the application of thin metal catalyst-coated tubular reactors in detail. In addition, the sulfate radical-based catalytic oxidation technique has also been described. This study also includes the effects of various operating parameters such as pH, temperature, the concentration of the oxidant, the initial concentration of dyes, and reaction time on the catalytic decomposition of dyes. Moreover, this paper analyzes the recent studies on catalytic oxidation processes. From the present study, it can be concluded that catalytic oxidation processes are very active and environmentally friendly methods for dye removal.

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Section: Metal-coated Tubular Reactorsmentioning

confidence: 99%

Section: Metal-coated Tubular Reactorsmentioning

confidence: 99%

Section: Metal-coated Tubular Reactorsmentioning

confidence: 99%

Section: Metal-coated Tubular Reactorsmentioning

confidence: 99%

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Catalytic Oxidation Process for the Degradation of Synthetic Dyes: An Overview

Javaid

Qazi

2019

IJERPH

Self Cite

275

101

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“…The wastewater from textile and printing industries contain high amount of color and carcinogenic compounds (Quan, Zhang, & Xu, 2015); synthetic dyes are resistant to removal because of their aromatic compounds, Remazol Brilliant Blue R (RBBR)the model dye -is a synthetic textile dye which is frequently used in producing polymeric dyes. It is toxic and organo-pollutant dye and has an anthraquinon structure (Javaid, Qazi, & Kawasaki, 2016).…”

Section: Introductionmentioning

confidence: 99%

Treatment of high saline textile wastewater by activated sludge microorganisms

Mirbolooki

Amirnezhad

Pendashteh

2017

Journal of Applied Research and Technology

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Textile wastewater is a combination of various chemicals and different types of dyes and has a salty nature. In this study, an SBR (sequencing batch reactor) was used to treat synthetic and real textile wastewaters in a 24 h cycle time. Remazol Brilliant Blue R, a reactive dye, was used as the model dye. Dye concentrations ranged from 125 mg/L to 500 mg/L, and TDS (total dissolved solids) concentrations ranged from 1000 mg/L to 10,000 mg/L in synthetic wastewaters. For the highest dye concentration (500 mg/L) with low TDS, an 80.71% COD removal efficiency was obtained; at a TDS concentration of 5000 mg/L, a 59.44% COD removal efficiency was obtained. When the TDS concentration of wastewater was raised to 10,000 mg/L, COD removal decreased to 14.92% and reductions in MLSS (mixed liquor suspended solids) and MLVSS (mixed liquor volatile suspended solids) concentrations were observed. According to the results, increasing the TDS concentration of wastewater up to 5000 mg/L did not affect COD removal efficiency of the activated sludge microorganisms in the treatment system.

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