Recent advances based on the synergetic effect of adsorption for removal of dyes from waste water using photocatalytic process

2018 ◽  
Vol 65 ◽  
pp. 201-222 ◽  
Author(s):  
Subramanian Natarajan ◽  
Hari C. Bajaj ◽  
Rajesh J. Tayade
Keyword(s):  
Waste Water ◽  
Synergetic Effect ◽  
Photocatalytic Process ◽  
Recent Advances

Photoelectrocatalytic Properties of Porous TiO2 Films Prepared Using ODA as Template

2012 ◽  
Vol 457-458 ◽  
pp. 521-524 ◽  
Author(s):  
Wen Jie Zhang ◽  
Qian Li ◽  
Hong Bo He
Keyword(s):  
Reaction Time ◽  
Methyl Orange ◽  
Degradation Rate ◽  
Synergetic Effect ◽  
Degradation Process ◽  
Absorption Peak ◽  
Photocatalytic Process ◽  
Applied Potential ◽  
Peak Intensity ◽  
Photoelectrocatalytic Degradation

The functions of applied potential to the photoelectrocatalytic degradation process of methyl orange were investigated. When using 0.05 M NaCl and under different applied potentials, the degradation rate increased obviously with increasing applied potential. When the applied potential was between 0.6 V-1.0 V, the degradation rate was enhanced drastically. The detected current values got larger as the applied potential increased from 0 up to 1.2 V. There was no direct electro-degradation to the dye in the solution. The applied potential and the irradiated light had synergetic effect when they were applied to the solution at the same time. While after irradiation for 0 to 60 min, with the increasing reaction time, methyl orange absorption peak intensity shrank obviously. The azo and benzene groups in methyl orange degraded totally under photocatalytic process.

Review on recent advances of carbon based adsorbent for methylene blue removal from waste water

2020 ◽  
Vol 16 ◽  
pp. 100233 ◽  
Author(s):  
E. Santoso ◽  
R. Ediati ◽  
Y. Kusumawati ◽  
H. Bahruji ◽  
D.O. Sulistiono ◽  
...  
Keyword(s):  
Waste Water ◽  
Methylene Blue ◽  
Recent Advances ◽  
Methylene Blue Removal ◽  
Carbon Based

Recent Advances in Membrane Based Waste Water Treatment Technology: A Review

2016 ◽  
Vol 5 (4) ◽  
pp. 241-267 ◽  
Author(s):  
Prashant Gupta ◽  
Vaidehi Lapalikar ◽  
Rikta Kundu ◽  
K. Balasubramanian
Keyword(s):  
Waste Water ◽  
Water Treatment ◽  
Waste Water Treatment ◽  
Treatment Technology ◽  
Recent Advances ◽  
Water Treatment Technology

Preparation Nano-Sized ZnO/Ag Particles and Photocatalytic Degradation of UDMH Wastewater

2014 ◽  
Vol 1015 ◽  
pp. 442-446 ◽  
Author(s):  
Ying Jia ◽  
Ya Nan He ◽  
Feng Hao Liang ◽  
Mei Yuan ◽  
Tian Tian Liu
Keyword(s):  
Waste Water ◽  
Quantum Yield ◽  
Photocatalytic Degradation ◽  
Crystallite Size ◽  
Hydrothermal Method ◽  
Light Sources ◽  
Photocatalytic Process ◽  
Spectral Absorption ◽  
Degradation Rates ◽  
Ag Particles

Different morphologies of nanoZnO have been synthesized by hydrothermal method and ethanol-assisted hydrothermal method, the quantum yield has been improved by noble metal doping, and also the range of spectral absorption has been widened. Then the products are used in the photocatalytic process of UDMH waste water. It is found that the crystallite size of the products is about 41~46nm, the maximum degradation rates of ZnO/Ag are 92.7% under the ultraviolet light, and 80.2% under the sunlight. The variation of the photocatalytic middle-product under different light sources is analyzed and it is found that the middle-product is decomposed more quickly and throughly under sunlight.

Photocatalytic Activities of Electrospun TiO2/Styrofoam Composite Nanofiber Membrane in Degradation of Waste Water

2015 ◽  
Vol 827 ◽  
pp. 7-12 ◽  
Author(s):  
Abdul Rajak ◽  
Muhammad Miftahul Munir ◽  
Abdullah Mikrajuddin ◽  
Khairurrijal
Keyword(s):  
Waste Water ◽  
Precursor Solution ◽  
Composite Fiber ◽  
Textile Dye ◽  
Photocatalytic Process ◽  
Fiber Membrane ◽  
Nanofiber Membrane ◽  
Structure And Morphology ◽  
Citronella Oil ◽  
Photocatalytic Activities

TiO2/Styrofoam composite fiber membranes were synthesized by using an electrospinning system for water purification applications. Composite fiber membrane was fabricated from precursor solution prepared by dissolving Styrofoam in the mixture of tetrahydrofuran (THF), citronella oil and cajuput oil. The precursor solutions is mixed with TiO2powder with three variations based on the concentration (1:15,1:20 and 1:40). Textile dye with 50 ppm of concentration was performed as a model of waste water. The structure and morphology of each membrane were characterized by using scanning electron microscopy (SEM). The photocatalytic activity was investigated under the bulb light with 60 watt of power in the box of photocatalytic test. Observation of photocatalytic process were performed for 30 hours. The quantitative data of the decrease in the concentration of wantex solution were measured by using UV-Vis spectrometer and simple spectrometer which was developed recently. It was shown that there are significant decrease of the concentration of wantex solutions performed by each membrane. As many as 69% of wantex solution have been successfully degraded for 30 hours under the bulb light.

Performance of Bi20TiO32 for Photocatalytic Degradation of Organic Pollutants in Water

2011 ◽  
Vol 233-235 ◽  
pp. 724-727
Author(s):  
Xu Hui Sun ◽  
Guo Hua Zhang ◽  
Lin Sun ◽  
Jun Ma
Keyword(s):  
Waste Water ◽  
Methyl Orange ◽  
Visible Light ◽  
Photocatalytic Degradation ◽  
Surface Charge ◽  
Organic Pollutants ◽  
Light Wavelength ◽  
Photocatalytic Process ◽  
Optimum Ph ◽  
Light Activity

The factors that influence the performance of Bi20TiO32were discussed, and the removal of TOC in the analogue waste water was also examined. The shorter the light wavelength or the more the intensity, the more efficient the photocatalytic process. Different substance has different optimum pH for being photodegraded by photocatalyst Bi20TiO32, which may be related with its surface charge. Aeration have little benefit for decomposing the organics. Some organics like methyl orange and phenol can be photodegraded by Bi20TiO32completely. Bi20TiO32has visible-light activity for the degradation of organics.

The Effect of Different Ions on Photodegradation Rhodamine B in TiO2 Suspension Liquid

2013 ◽  
Vol 807-809 ◽  
pp. 2739-2742
Author(s):  
Peng Wei Huo ◽  
Mao Bin Wei ◽  
Xin Lin Liu ◽  
Dan Dan Wang ◽  
Zi Yang Lu ◽  
...  
Keyword(s):  
Waste Water ◽  
Photocatalytic Degradation ◽  
Rhodamine B ◽  
Degradation Rate ◽  
Ph Value ◽  
Degradation Process ◽  
Photocatalytic Process ◽  
Negative Effect ◽  
Anions And Cations

The photocatalytic degradation process of waste water was usually influenced by many factors, such as different ions, addition reagent and pH value. In order to investigate the effect of ions strength in the photocatalytic process, the anions and cations were systematically investigated with P25 TiO2 photocatalyst with Rhodamine B (RB) as waste water in this work. The results showed that the cations of low valence showed minimum negative effect on degradation rate and the most anions showed enhance the degradation rate of RB. The ions strength showed random in the photocatalytic process.

Photocatalytic Purification of Wastewater Polluted by Odorant Sulfur Compounds Using Titanium Oxide in a Continuous Photoreactor

2013 ◽  
Vol 11 (1) ◽  
pp. 561-567 ◽  
Author(s):  
Mohammad Reza Toosi ◽  
Mohamad Hasan Peyravi ◽  
Jafar Sajadi ◽  
Mohamad J. Bayani ◽  
Hadi Manghabati
Keyword(s):  
Waste Water ◽  
Titanium Dioxide ◽  
Photocatalytic Degradation ◽  
Titanium Oxide ◽  
Efficient Method ◽  
Ex Situ ◽  
Photocatalytic Decomposition ◽  
Methyl Ethyl ◽  
Photocatalytic Process ◽  
Initial Concentration

Abstract Using titanium dioxide, photocatalytic degradation of waste water polluted by commercial mercaptans (80% t-butyl mercaptan and 20% methyl ethyl sulfide) was investigated in a continuous photoreactor in the presence of UV irradiation. The reaction was performed at different pH of solution, intensity of irradiation, and initial concentration of odorant. Kinetics and mechanism of photocatalytic decomposition of mercaptans were studied by ex situ FTIR measurements of intermediates. The results showed that the photocatalytic process for degradation of mercaptans was an efficient method for mineralization of sulfur odorants in waste water. A proposed mechanism of mineralization of mercaptan was presented based on the results.

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