A highly energy-efficient flow-through electro-Fenton process for organic pollutants degradation

2016 ◽  
Vol 200 ◽  
pp. 222-230 ◽  
Author(s):  
Liang Ma ◽  
Minghua Zhou ◽  
Gengbo Ren ◽  
Weilu Yang ◽  
Liang Liang
Keyword(s):  
Organic Pollutants ◽  
Energy Efficient ◽  
Fenton Process ◽  
Flow Through

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.

Heat Compensation in Buildings Using Thermoelectric Windows: An Energy Efficient Window Technology

2008 ◽  
Author(s):  
Rhys-Sheffer Birthwright ◽  
Achille Messac ◽  
Timothy Harren-Lewis ◽  
Sirisha Rangavajhala
Keyword(s):  
Energy Efficient ◽  
Coefficient Of Performance ◽  
Building Structures ◽  
Practical Applications ◽  
Current Input ◽  
Flow Through ◽  
Conventional Systems ◽  
Window Design ◽  
Absorption Power ◽  
Do So

In this paper, we explore the design of thermoelectric (TE) windows for applications in building structures. Thermoelectric windows are equipped with TE units in the window frame to provide a heat absorption power, given a direct current input. We explore the design performance of the TE window to compensate for its own heat gains. While existing energy efficient windows have made advances towards reducing the heat transfer through them, they still depend on the building’s heating, ventilation and air-conditioning (HVAC) system to compensate for their heat gains. Our research explores the design of a window that can actively compensate for the passive heat flow through the window panes, and to do so with a better coefficient of performance (COP) than conventional HVAC systems. We also optimize the TE window design, and present results of the potential performance for practical applications in the building structure. For the geographic locations considered (Hawaii and Miami), the results are promising. Interestingly, the proposed TE window design actively compensates for the conduction heat gains with a COP greater than three, while that of conventional systems is typically less than three.

TREATMENT OF PERSISTENT ORGANIC POLLUTANTS IN LED REACTOR USING FERROUS SULFATE AND IRON WASTE FOR FENTON PROCESS

2021 ◽  
Vol 20 (6) ◽  
pp. 883-893
Author(s):  
Daniella Carla Napoleao ◽  
Sergio Gonzaga dos Santos Junior ◽  
Rayany Magali da Rocha Santana ◽  
Rayssa Kelen de Mendonca Gomes ◽  
Nathalia Farias Santos de Moraes ◽  
...  
Keyword(s):  
Organic Pollutants ◽  
Persistent Organic Pollutants ◽  
Ferrous Sulfate ◽  
Fenton Process

Degradation of organic pollutants by heterogeneous electro-Fenton process using Mn-alginate composite

2014 ◽  
Vol 90 (8) ◽  
pp. 1439-1447 ◽  
Author(s):  
Maria Ángeles Fernández de Dios ◽  
Emilio Rosales ◽  
María Fernández-Fernández ◽  
Marta Pazos ◽  
Maria Ángeles Sanromán
Keyword(s):  
Organic Pollutants ◽  
Fenton Process

Anodic Fenton process assisted by a microbial fuel cell for enhanced degradation of organic pollutants

2012 ◽  
Vol 46 (14) ◽  
pp. 4371-4378 ◽  
Author(s):  
Xian-Wei Liu ◽  
Xue-Fei Sun ◽  
Dao-Bo Li ◽  
Wen-Wei Li ◽  
Yu-Xi Huang ◽  
...  
Keyword(s):  
Fuel Cell ◽  
Microbial Fuel Cell ◽  
Organic Pollutants ◽  
Fenton Process ◽  
Enhanced Degradation

Removal of Organic Pollutants from Reverse Osmosis Concentrate by Electro-Fenton Process

2014 ◽  
Vol 955-959 ◽  
pp. 2294-2299 ◽  
Author(s):  
Hui Ling Du ◽  
Bao Yuan Pan ◽  
Jing Li
Keyword(s):  
Organic Pollutants ◽  
Pulse Generator ◽  
Treatment Time ◽  
Removal Rate ◽  
High Voltage Pulse ◽  
Aeration Rate ◽  
Cod Removal ◽  
Fenton Process ◽  
Voltage Pulse Generator ◽  
Cod Removal Rate

The RO concentrate containing non-degradation organic pollutants was treated by electro-Fenton process. The high voltage pulse generator was used as discharge power. The effects of pulsed electric field parameters, aeration rate and pH on COD removal rate was investigated. The results indicate that the COD removal rate is up to 80.71% when pulsed voltage, pulsed frequency, treatment time, aeration rate and pH are 30000 V, 5 Hz, 240 s, 1.0 m3/h and 10, respectively.

scholarly journals Energy-Efficient Coding with Discrete Stochastic Events

2002 ◽  
Vol 14 (6) ◽  
pp. 1323-1346 ◽  
Author(s):  
Susanne Schreiber ◽  
Christian K. Machens ◽  
Andreas. V. M. Herz ◽  
Simon B. Laughlin
Keyword(s):  
Energy Efficiency ◽  
Energy Efficient ◽  
Information Transfer ◽  
Energy Use ◽  
Bimodal Distribution ◽  
Fixed Cost ◽  
Signaling Cost ◽  
Trade Offs ◽  
Flow Through ◽  
Stochastic Events

We investigate the energy efficiency of signaling mechanisms that transfer information by means of discrete stochastic events, such as the opening or closing of an ion channel. Using a simple model for the generation of graded electrical signals by sodium and potassium channels, we find optimum numbers of channels that maximize energy efficiency. The optima depend on several factors: the relative magnitudes of the signaling cost (current flow through channels), the fixed cost of maintaining the system, the reliability of the input, additional sources of noise, and the relative costs of upstream and downstream mechanisms. We also analyze how the statistics of input signals influence energy efficiency. We find that energy-efficient signal ensembles favor a bimodal distribution of channel activations and contain only a very small fraction of large inputs when energy is scarce. We conclude that when energy use is a significant constraint, trade-offs between information transfer and energy can strongly influence the number of signaling molecules and synapses used by neurons and the manner in which these mechanisms represent information.

scholarly journals Aspects Concerning the Photo- and Biodegradation of Benzothiazoles in Aquatic Compartment

2008 ◽  
Vol 3 (2) ◽  
pp. 58-64
Author(s):  
A.-M. Delort ◽  
P. Besse ◽  
G. Mailhot ◽  
M. Sancelme ◽  
B. Combourieu ◽  
...  
Keyword(s):  
Organic Pollutants ◽  
Water Environment ◽  
Rhodococcus Rhodochrous ◽  
Continuous Action ◽  
Photocatalytic Reactor ◽  
New Type ◽  
Flow Through ◽  
Refractory Organic Pollutants ◽  
Simple Systems ◽  
Aquatic Compartment

With the scope to provide complete decomposition of benzothiazoles in water environment, two approaches have been applied including the photocatalytic and biodegradation processes. A new type of continuous-action flow-through photocatalytic reactor was developed, in which it is possible to combine the homogeneous and heterogeneous destruction of refractory organic pollutants. The interactions between the different components of the aminobenzothiazole-containing system under the conditions of photo- and biodegradation (light, iron, free and immobilized bacterial strain Rhodococcus rhodochrous) were analysed. The combined systems “Fe ± light +Rh.rhodochrous” are more effective than simple systems.

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