Effects of electrochemical processes in DC diaphragm discharge in water solution of textile dye direct blue 106

2008 ◽  
Author(s):  
Zdenka Stara ◽  
Jaroslava Davidova ◽  
Barbora Olexova ◽  
Frantisek Krcma ◽  
Ivo Soural
Keyword(s):  
Water Solution ◽  
Textile Dye ◽  
Diaphragm Discharge ◽  
Electrochemical Processes ◽  
Direct Blue

scholarly journals Study of a fixed-bed column in the adsorption of an azo dye from an aqueous medium using a chitosan–glutaraldehyde biosorbent

2017 ◽  
Vol 36 (1-2) ◽  
pp. 215-232 ◽  
Author(s):  
Jaime López-Cervantes ◽  
Dalia I Sánchez-Machado ◽  
Reyna G Sánchez-Duarte ◽  
Ma A Correa-Murrieta
Keyword(s):  
Flow Rate ◽  
Service Time ◽  
Fixed Bed ◽  
Textile Dye ◽  
Time Model ◽  
Fixed Bed Column ◽  
Bed Height ◽  
Direct Blue ◽  
Direct Blue 71 ◽  
Bed Depth Service Time

A continuous adsorption study in a fixed-bed column was carried out using a chitosan–glutaraldehyde biosorbent for the removal of the textile dye Direct Blue 71 from an aqueous solution. The biosorbent was prepared from shrimp shells and characterized by scanning electron microscopy, X-ray diffraction, and nuclear magnetic resonance spectroscopy. The effects of chitosan–glutaraldehyde bed height (3–12 cm), inlet Direct Blue 71 concentration (15–50 mg l−1), and feed flow rate (1–3 ml min−1) on the column performance were analyzed. The highest bed capacity of 343.59 mg Direct Blue 71 per gram of chitosan–glutaraldehyde adsorbent was obtained using 1 ml min−1 flow rate, 50 mg l−1 inlet Direct Blue 71 concentration, and 3 cm bed height. The breakthrough curve was analyzed using the Adams–Bohart, Thomas, and bed depth service time mathematical models. The behaviors of the breakthrough curves were defined by the Thomas model at different conditions. The bed depth service time model showed good agreement with the experimental data, and the high values of correlation coefficients (R2 ≥ 0.9646) obtained indicate the validity of the bed depth service time model for the present column system.

scholarly journals Electrochemical stability of metformin in NaHCO3 and Na2SO4 water solution at Au, GC and IrOx electrodes

2019 ◽  
Vol 84 (11) ◽  
pp. 1319-1327
Author(s):  
Jelena Lovic ◽  
Jelena Ladjarevic ◽  
Dusan Mijin ◽  
Milka Jadranin ◽  
Slobodan Petrovic ◽  
...  
Keyword(s):  
Square Wave Voltammetry ◽  
Water Solution ◽  
Uv Spectroscopy ◽  
Sodium Sulphate ◽  
Electrochemical Stability ◽  
Electrochemical Processes ◽  
Wave Voltammetry ◽  
Oral Antihyperglycaemic Agent ◽  
The Stability ◽  
Total Organic Carbon Analysis

In this study the electrochemical behavior of metformin (MET), oral antihyperglycaemic agent, was assayed at three different electrodes. The drug standard was investigated by cyclic voltammetry and square wave voltammetry via its electrooxidation at Au and glassy carbon electrode in 0.05 M NaHCO3. Under these conditions transformation of MET to corresponding N-carbonyl guanidine via oxime intermediate is suggested. The stability of MET was tested under directed stress conditions using IrOx electrode with sodium sulphate as an electrolyte and cyclic 4-amino-2-imino-1-methyl-1,2-dihydro-1,3,5-triazine appeared as the main end-product. The courses of the electrochemical processes at three electrodes were followed by UV spectroscopy and evaluated by total organic carbon analysis.

scholarly journals Decolorization of CI Direct Blue 201 Textile Dye by Native Bacteria

2017 ◽  
Vol 4 (1) ◽  
pp. 48 ◽  
Author(s):  
E. M. M. S. Ekanayake ◽  
Pathmalal M. Manage
Keyword(s):  
Textile Dye ◽  
Direct Blue

Study on Adsorption and Desorption Performance of Direct Dyes on Anionic Exchange Membrane

2012 ◽  
Vol 550-553 ◽  
pp. 648-652
Author(s):  
Kai Hu ◽  
Jie Xu ◽  
Tie Ling Xing ◽  
Guo Qiang Chen
Keyword(s):  
Water Solution ◽  
Adsorption Model ◽  
Direct Dyes ◽  
Adsorption And Desorption ◽  
Direct Blue ◽  
Anionic Exchange ◽  
Adsorption Processes ◽  
Adsorption And Desorption Performance ◽  
Exchange Membrane ◽  
Anionic Exchange Membrane

The adsorption and desorption performance of C.I. Direct Red 13 and C.I. Direct Blue 6 on anionic exchange membrane were studied. The adsorption and desorption performances of anionic exchange membrane under different conditions were compared. The results showed that the adsorption accords with the pseudo-second dynamics model. Langmuir adsorption model could well describe adsorption processes. The addition of inorganic salt Na2SO4 in the dye solution had certain influence on the adsorption. The desorption percentage could reach above 80% using the mixture of ethanol, sodium chloride and water solution as desorbent, and the anionic exchange membrane could be reused.

scholarly journals Application of non-thermal plasma reactor for degradation and detoxification of high concentrations of dye Reactive Black 5 in water

2016 ◽  
Vol 81 (7) ◽  
pp. 829-845 ◽  
Author(s):  
Biljana Dojcinovic ◽  
Bratislav Obradovic ◽  
Milorad Kuraica ◽  
Marija Pergal ◽  
Slobodan Dolic ◽  
...  
Keyword(s):  
Energy Density ◽  
Plasma Treatment ◽  
Thermal Plasma ◽  
Flow Reactor ◽  
Water Solution ◽  
Plasma Reactor ◽  
Textile Dye ◽  
Reactive Black 5 ◽  
Non Thermal Plasma ◽  
High Concentrations

Degradation and detoxification efficiency of high concentrations of commercially available reactive textile dye Reactive Black 5 solution (40, 80, 200, 500, 1000 mg L-1), were studied. Advanced oxidation processes in water falling film based dielectric barrier discharge as a non-thermal plasma reactor were used. For the first time, this reactor was used for the treatment of high concentrations of organic pollutants such as reactive textile dye Reactive Black 5 in water. Solution of the dye is treated by plasma as thin water solution film that is constantly regenerated. Basically, the reactor works as a continuous flow reactor and the electrical discharge itself takes place at the gas-liquid interphase. The dye solution was recirculated through the reactor with an applied energy density of 0-374 kJ L-1. Decolorization efficiency (%) was monitored by UV-VIS spectrophotometric technique. Samples were taken after every recirculation (~ 22 kJ L-1) and decolorization percent was measured after 5 min and 24 h of plasma treatment. The efficiency of degradation (i.e. mineralization) and possible degradation products were also tracked by determination of the chemical oxygen demand (COD) and by ion chromatography (IC). Initial toxicity and toxicity of solutions after the treatment were studied with Artemia salina test organisms. Efficiency of decolorization decreased with the increase of the dye concentration. Complete decolorization, high mineralization and non-toxicity of the solution (<10 %) were acomplished after plasma treatment using energy density of 242 kJ L-1, while the initial concentrations of Reactive Black 5 were 40 and 80 mg L-1.

Sign in / Sign up

Export Citation Format

Share Document