scholarly journals An efficient green photo-Fenton system for the degradation of organic pollutants. Kinetics of propranolol removal from different water matrices

2022 ◽  
Vol 46 ◽  
pp. 102514
Author(s):  
W. Remache ◽  
D.R. Ramos ◽  
L. Mammeri ◽  
H. Boucheloukh ◽  
Z. Marín ◽  
...  
Keyword(s):  
Organic Pollutants ◽  
Kinetics Of ◽  
Fenton System

Photocatalysis of Coomassie Brilliant Blue Using Clay Mineral

2016 ◽  
Vol 869 ◽  
pp. 765-767 ◽  
Author(s):  
Layane Rodrigues Almeida ◽  
João Sammy Nery Souza ◽  
Edson Cavalcanti Silva Filho ◽  
Josy Anteveli Osajima
Keyword(s):  
Organic Pollutants ◽  
Uv Light ◽  
Brilliant Blue ◽  
Blue Dye ◽  
Secondary Treatment ◽  
Toxic Compounds ◽  
Coomassie Brilliant Blue ◽  
Kinetics Of ◽  
Coomassie Brilliant ◽  
Photocatalytic Processes

The presence of organic pollutants, which cannot be eliminated by conventional processes of primary and secondary treatment, can be problematic. Photocatalytic processes offer an efficient breakdown of organic pollutants into non-toxic compounds such as CO2 and H2O. This paper proposes the use of the titanium dioxide embedded in palygorskite as a photoactive material in the degradation of cationic dye, Coomassie Brilliant Blue. The system was irradiated using UV light for a maximum time of 120 minutes. The concentration of the dye used was 1.0x10-4 mol L-1 in 0.5 g L-1 of the photoactive material. The kinetics of the system was monitored by UV-Vis spectrophotometry. In 120 minutes of radiation, the process of photocatalysis reduced the initial concentration of the Coomassie Brilliant Blue dye in half.

Photooxidation Kinetics of Organic Pollutants in Municipal Waste Water

1971 ◽  
Vol 10 (4) ◽  
pp. 509-514 ◽  
Author(s):  
Victor Schorr ◽  
Bruno Boval ◽  
Vladislav Hancil ◽  
J. M. Smith
Keyword(s):  
Waste Water ◽  
Organic Pollutants ◽  
Municipal Waste ◽  
Kinetics Of

Simultaneous photochemical generation of ozone in the gas phase and photolysis of aqueous reaction systems using one VUV light source

1997 ◽  
Vol 35 (4) ◽  
pp. 41-48 ◽  
Author(s):  
T.M. Hashem ◽  
M. Zirlewagen ◽  
A. M. Braun
Keyword(s):  
Gas Phase ◽  
Light Source ◽  
Organic Pollutants ◽  
Vacuum Ultraviolet ◽  
Oxidative Degradation ◽  
Reaction System ◽  
Photochemical Reactions ◽  
Experimental Conditions ◽  
Photochemical Generation ◽  
Kinetics Of

A more efficient use of vacuum ultraviolet (VUV) radiation produced by an immersed Xe-excimer light source (172 nm) was investigated for the oxidative degradation of organic pollutants in aqueous systems. All emitted VUV radiation from one light source was used in two simultaneous but separate photochemical reactions: (1) photochemical generation of ozone by irradiating oxygen in the gas phase and (2) photolysis of the aqueous reaction system. The gas stream containing the generated ozone is sparged into the reaction system, thus enhancing the oxidative degradation of organic pollutants. The photochemically generated ozone in the gas phase was quantitatively analyzed, and the kinetics of the degradation of 4-chlorophenol (4-CP) and of the dissolved organic carbon (DOC) were determined under different experimental conditions. The results show that the rates of degradation of the substrate and of the DOC decrease in the order of the applied processes, VUV/O3 > O3 > VUV.

scholarly journals Efficient H2O2 generation and electro-Fenton degradation of pollutants in microchannels of oxidized monolithic-porous-carbon cathode

2019 ◽  
Vol 80 (5) ◽  
pp. 970-978
Author(s):  
Yunfei Guo ◽  
Shuai Wu ◽  
Hongtao Yu ◽  
Shuo Chen ◽  
Chunna Wang ◽  
...  
Keyword(s):  
Heat Treatment ◽  
Organic Pollutants ◽  
Porous Carbon ◽  
Hydraulic Retention Time ◽  
Fenton Process ◽  
Initial Concentration ◽  
H2o2 Generation ◽  
Flow Through ◽  
Fenton System ◽  
Degradation Of Pollutants

Abstract A monolithic-porous carbon (MPC) was fabricated by carbonizing a pine rod, and then the oxidized monolithic-porous carbon (O-MPC) was obtained via alkaline heat treatment of MPC. With well-ordered axial channels (diameters were 6–14 μm and 40–50 μm) and oxygen-containing functional groups, O-MPC as a flow-through cathode exhibited good capability in continuously generating H2O2 (422 μmol/L) via oxygen reduction. O-MPC and additional Fe2+ composed an electro-Fenton system and the performance of the system in degradation of organic pollutants was evaluated. For phenol, bisphenol A or sulfamethoxazole at initial concentration of 10 mg/L the removal efficiency reached 74%–82% in a hydraulic retention time of 100 seconds, nearly close to that of the homogeneous Fenton process (90%). This efficiency may be maintained for at least 10 hours, indicating a good stability of O-MPC. The results demonstrate the potential of O-MPC as a flow-through electrode to realize homogeneous-like degradation of organic pollutants in wastewater.

Kinetics of aerobic biodegradation of organic pollutants in moving bed biological reactor (MBBR)

2017 ◽  
Vol 98 ◽  
pp. 31-36
Author(s):  
R. Saberi ◽  
A.H. Hassani ◽  
M.S. Abedi ◽  
A.T. Ardeshir ◽  
A. Mozaffari
Keyword(s):  
Organic Pollutants ◽  
Aerobic Biodegradation ◽  
Moving Bed ◽  
Kinetics Of

Titanium Dioxide-mediated Photocatalysed Mineralization of Two Selected Organic Pollutants in Aqueous Suspensions

2013 ◽  
Vol 16 (2) ◽  
Author(s):  
Khalid Umar ◽  
M. M. Haque ◽  
Niyaz A. Mir ◽  
M. Muneer ◽  
I. H. Farooqi
Keyword(s):  
Titanium Dioxide ◽  
Organic Pollutants ◽  
Hplc Analysis ◽  
Irradiation Time ◽  
Atmospheric Oxygen ◽  
Model Compounds ◽  
Aqueous Suspensions ◽  
Analysis Technique ◽  
Mineralization Kinetics ◽  
Kinetics Of

AbstractTitanium dioxide-mediated photocatalytic mineralization of two selected organic pollutants such as Metalaxyl (ML) and Tinidazole (TN) has been investigated in aqueous suspensions in the presence of atmospheric oxygen under a variety of conditions. The mineralization was studied by monitoring the depletion in total organic carbon (TOC) content as a function of irradiation time. In addition HPLC analysis technique was also used to monitor the degradation of model compounds under investigations. The mineralization kinetics of both compounds were investigated under different conditions such as type of TiO

scholarly journals Application and mechanism of ferrihydrite in the EDDS improved heterogeneous photo-Fenton system: the role of different reactive species under different conditions

2020 ◽  
Vol 44 (18) ◽  
pp. 7602-7610
Author(s):  
Hongjie Xie ◽  
Mengqi Luo ◽  
Wenyu Huang ◽  
Ying Huang ◽  
Xiaoqing Feng ◽  
...  
Keyword(s):  
Iron Oxide ◽  
Carboxylic Acid ◽  
Organic Pollutants ◽  
Reactive Species ◽  
Natural Iron ◽  
Fenton System

The application of carboxylic acid and natural iron oxide in heterogeneous AOP systems for the treatment of organic pollutants in water has attracted extensive attention.

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