Removal of Dye from Textile Dyeing Wastewater by Using Oxidized Multiwalled Carbon Nanotubes

The batch removal of dye from textile dyeing wastewater by using nanooxides decorated multiwalled carbon nanotubes was studied under electron beam conditions. The effect of different nanooxides decorated multiwalled carbon nanotubes content and irradiation dosage was also investigated. The color removal efficiency was 94.9% in dose of 17.5kGy. The colour removal efficiency with Fe2O3 decorated multiwalled carbon nanotubes was similar to with TiO2 decorated multiwalled carbon nanotubues. The COD removal efficiency was 52.5% in the dose of 14.0kGy. When the irradiation dose of 17.5kGy, the COD removal efficiency was 98.2% with TiO2 decorated multiwalled carbon nanotubes.Overall, the study demonstrated that nanooxides decorated multiwalled carbon nanotubes can effectively remove color and COD from aqueous solution under irradiation.

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Treatment of simulated printing and dyeing wastewater using ozone microbubble

E3S Web of Conferences ◽

10.1051/e3sconf/202126104005 ◽

2021 ◽

Vol 261 ◽

pp. 04005

Author(s):

Emmanuel Nkudede ◽

Husseini Sulemana ◽

Bo Zhang ◽

Kaida Zhu ◽

Shan Hu ◽

...

Keyword(s):

Mass Transfer ◽

Methylene Blue ◽

Removal Efficiency ◽

Human Life ◽

Cod Removal ◽

Dyeing Wastewater ◽

Flow Rates ◽

Printing And Dyeing Wastewater ◽

Cod Removal Efficiency ◽

Initial Ph

Owing to its widespread and persistent usage, methylene blue (MB) is an environmental substance, mostly found in the printing and dyeing industry that raises concerns in the environment recently by posing significant threat to human life and the ecosystem as a whole. Thus, there is the need to effectively manage and treat the wastewater from these industries before reaching to the available water sources. Ozonation treatment is very efficient in treating printing and dyeing wastewater (MB) and can be greatly improved by using micro-bubble technology. Microbubble dissolution is an effective way to improve the rate of ozone mass transfer. To discover these properties, a method was used to improve the mass transfer of ozone microbubbles, which was used to effectively treat simulated printing and dyeing wastewater. We investigated the effects of pH, water temperature, ozone flow, and other conditions on the dissolution and attenuation properties of ozone in methylene blue microbubble solutions. Treatment of simulated printing and dyeing wastewater (methylene blue) was investigated under various initial pH and ozone flow rates. A catalytic exhibition was performed towards the decolorization of methylene blue (MB) concentrations and the corresponding COD removal efficiency. Ozone depletion and pH levels played key roles in MB degradation. Under high pH level of 11.01, the rate of removal of COD was 93.5%. Ozone dosage also has direct effect on COD removal efficiency and decolorization. Higher ozone flow rates, 0.4 L/min and 0.5 L/min recorded more than 94% degradation of COD thus very effective and efficient. Also, ozone flow rates 0.3 L/min, 0.4 L/min and 0.5 L/min with initial pH, 7.03, 6.63 and 6.36 decreased to 3.43, 3.49 and 3.44 after reaction processes which clearly shows that with high ozone dosage, pH reduces considerably.

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Study on the Advanced Treatment of Printing and Dyeing Wastewater by Fenton Oxidation

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.1010-1012.805 ◽

2014 ◽

Vol 1010-1012 ◽

pp. 805-808

Author(s):

Xiu Wen Wu ◽

Ping Ma ◽

Hui Xia Lan ◽

Heng Zhang ◽

Shan Hong Lan

Keyword(s):

Reaction Time ◽

Removal Efficiency ◽

Treatment Effect ◽

Cod Removal ◽

Fenton Oxidation ◽

Advanced Treatment ◽

Dyeing Wastewater ◽

Printing And Dyeing Wastewater ◽

Cod Removal Efficiency

The influence of H2O2、addition of Fe2+、pH、reaction time and temperature to advanced treatment effect of printing and dyeing wastewater with Fenton oxidation was studied. The results showed that when the addition of H2O2(the concentration was 30%) was 3mL/L,the addition of FeSO4·7H2O was 1.6g/L,pH was 4,the temperature was about 30°C,reacting time was 35min,the COD removal efficiency achieved above 55%,COD of effluent was below 45mg/L.

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Enhanced Photo–Fenton Removal Efficiency with Core-Shell Magnetic Resin Catalyst for Textile Dyeing Wastewater Treatment

Water ◽

10.3390/w13070968 ◽

2021 ◽

Vol 13 (7) ◽

pp. 968

Author(s):

Jie Zhong ◽

Bin Yang ◽

Yong Feng ◽

Yang Chen ◽

Li-Gao Wang ◽

...

Keyword(s):

Removal Efficiency ◽

In Situ Polymerization ◽

Matrix Effects ◽

Core Shell ◽

Dyeing Wastewater ◽

Practical Applications ◽

Textile Dyeing ◽

Reactive Radicals ◽

Fenton System ◽

Textile Dyeing Wastewater

Heterogeneous photo–Fenton reactions have been regarded as important technologies for the treatment of textile dyeing wastewaters. In this work, an efficient core-shell magnetic anion exchange resin (MAER) was prepared through in situ polymerization and used to remove reactive brilliant red (X-3B) in a UV–Fenton system. The MAER exhibited satisfactory removal efficiency for X-3B because of its highly effective catalytic activity. More than 99% of the X-3B (50 mg/L) was removed within 20 min in the UV–Fenton reaction. This is because the uniformly dispersed core-shell magnetic microsphere resin could suppress the aggregation of Fe3O4 nanoparticles and, thus, enhance the exposure of Fe reaction sites for catalytic reaction with H2O2. The good adsorption capacity of MAER also played an important role in promoting contact between X-3B and reactive radicals during the reaction. Mechanism research showed that hydroxyl radical (•OH) was the main reactive radicals for the removal of X-3B in the MAER UV–Fenton system. The MAER can be easily separated by a magnet after catalytic reactions. Moreover, the matrix effects of different substrates (Cl−, NO3−, SO42−, and humic acid) were investigated. The results showed that SO42− could be beneficial to improve the removal of X-3B but that the others decrease the removal. The MAER UV–Fenton also removed significant amounts of total organic carbon (TOC) for the X-3B solution and an actual textile dyeing industrial wastewater. The heterogeneous oxidation system established in this work may suggest prospects for practical applications in the treatment of textile dyeing wastewater.

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Flocculant Screening for the Pretreatment of Printing and Dyeing Wastewater

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.1010-1012.761 ◽

2014 ◽

Vol 1010-1012 ◽

pp. 761-764

Author(s):

Shan Hong Lan ◽

Ping Ma ◽

Shi Wen Geng ◽

Jia Hao Sun ◽

Hui Xia Lan ◽

...

Keyword(s):

Removal Efficiency ◽

Treatment Effect ◽

Treatment Effects ◽

Cod Removal ◽

Dyeing Wastewater ◽

Treatment Efficiency ◽

Printing And Dyeing Wastewater ◽

Cod Removal Efficiency ◽

Optimum Ph ◽

Addition Amount

Study on the pretreatment of printing and dyeing wastewater with PAC、Fe2(SO4)3and FeCl3was carried out. Effects of the flocculants dosage, pH on the treatment efficiency were studied. The results showed that with PAC, Fe2(SO4)3and the FeCl3dosage rising, the treatment effect first decreased and then increased and when the addition amount was 300 mg.L-1、300mg.L-1and 250 mg.L-1,the COD removal efficiency achieved 69%、78%、74% , respectively. With the rising of pH, the treatment effects of the three types of flocculants increased first and then decreased, the optimum pH of PAC and Fe2(SO4)3was 7and the best pH of FeCl3was 6. At last, the settle ability and the amount of the producing floc were studied, the results showed that the settle ability was the best and the least amount of sludge produced by FeCl3flocculation. Keywords: printing and dyeing wastewater, pretreatment, flocculants, screening.

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Biological and Physical-Chemical Treatment of Textile Dyeing Wastewater for Color and COD Removal

Ozone Science and Engineering ◽

10.1080/01919510108962003 ◽

2001 ◽

Vol 23 (3) ◽

pp. 199-206 ◽

Cited By ~ 9

Author(s):

Tuba Turan-Ertas

Keyword(s):

Chemical Treatment ◽

Cod Removal ◽

Dyeing Wastewater ◽

Physical Chemical ◽

Textile Dyeing ◽

Textile Dyeing Wastewater ◽

Color And Cod Removal

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Effects of Current Density and Electrolyte on COD Removal Efficiency in Dyeing Wastewater Treatment by using Electro-coagulation

Journal of Korea Society of Waste Management ◽

10.9786/kswm.2018.35.7.653 ◽

2018 ◽

Vol 35 (7) ◽

pp. 653-659

Author(s):

Seong-Ho Jang ◽

Go-Eun Kim ◽

Jeong-Hee Kang ◽

Jae-Yong Ryu ◽

Won-ki Lee ◽

...

Keyword(s):

Wastewater Treatment ◽

Removal Efficiency ◽

Current Density ◽

Cod Removal ◽

Dyeing Wastewater ◽

Cod Removal Efficiency ◽

Electro Coagulation

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Removal of atenolol from aqueous solutions by multiwalled carbon nanotubes modified with ozone: kinetic and equilibrium study

Water Science & Technology ◽

10.2166/wst.2018.105 ◽

2018 ◽

Vol 2017 (3) ◽

pp. 636-649 ◽

Cited By ~ 2

Author(s):

Bahare Dehdashti ◽

Mohammad Mehdi Amin ◽

Hamidreza Pourzamani ◽

Lida Rafati ◽

Mehdi Mokhtari

Keyword(s):

Carbon Nanotubes ◽

Aqueous Solutions ◽

Multiwalled Carbon Nanotubes ◽

Removal Efficiency ◽

Contact Time ◽

Maximum Adsorption Capacity ◽

Multiwall Carbon Nanotube ◽

Multiwalled Carbon ◽

Initial Concentration ◽

Multiwall Carbon

Abstract The aim of study is removal of atenolol from aqueous solutions by multiwalled carbon nanotubes modified with ozone. The design of the experiment was adopted across four levels with the L16 matrix arrangement. The factors influencing atenolol adsorption include changes in the pH value, contact time, the dose of the modified multiwall carbon nanotube, and the initial concentration of atenolol in the solution; these factors were evaluated along with the extent of their influence on removal efficiency. Data analyses were performed by the Design Expert 6 software. The results indicated that the pH, contact time, adsorbent dose, and the initial concentration were 7, 20 min, 0.15 g/L and 1 mg/L, respectively. In this state, the removal efficiency was calculated to be 75.79%. The maximum adsorption capacity was obtained as 5.05 mg/g under optimal conditions. The data were analyzed using adsorption models obtained from the isotherm fitting tool software. The results suggested that the data had a greater congruence with the Freundlich model (corrected Akaike information criterion = 2.58). Furthermore, the kinetics of the reactions followed pseudo second order kinetics (R2 = 0.95). Based on this study, it can be concluded that modified multiwall carbon nanotubes enjoy high potential and efficiency as adsorbents for the removal of atenolol from aqueous solutions.

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