scholarly journals Electrodegradation of Acid Mixture Dye through the Employment of Cu/Fe Macro-Corrosion Galvanic Cell in Na2SO4 Synthetic Wastewater

Molecules ◽  
2021 ◽  
Vol 26 (15) ◽  
pp. 4580
Author(s):  
Mateusz Kuczyński ◽  
Mateusz Łuba ◽  
Tomasz Mikołajczyk ◽  
Bogusław Pierożyński ◽  
Agnieszka Jasiecka-Mikołajczyk ◽  
...  

Traditional wastewater purification processes are based on a combination of physical, chemical, and biological methods; however, typical electrochemical techniques for removing pollutants require large amounts of electrical energy. In this study, we report on a process of wastewater purification, through continuous anodic dissolution of iron anode for aerated Cu/Fe galvanic cell in synthetic Na2SO4 wastewater solution. Electrochemical experiments were conducted by means of a laboratory size electrolyzer, where electrocoagulation along with electrooxidation phenomena were examined for wastewater containing Acid Mixture dye. The above was visualized through the employment of electrochemical (cyclic voltammetry and ac impedance spectroscopy techniques) along with instrumental spectroscopy analyses.

2001 ◽  
Author(s):  
Debbie L. Adolphson ◽  
Terri L. Arnold ◽  
Faith A. Fitzpatrick ◽  
Mitchell A. Harris ◽  
Kevin D. Richards ◽  
...  

2013 ◽  
pp. 22-39
Author(s):  
Daniel Leslie Tan ◽  
Julie Tan ◽  
Mark Anthony Atanacio ◽  
Ruel Delantar

Energy from edible and inedible root crop roots and tubers using galvanic cell and processing waste waters through microbial fuel cell (MFC) technology was harnessed. Electrolyte in the roots and tubers was tapped for galvanic cell and the microorganisms from waste waters act as catalyst in MFC. In galvanic cell, the optimized responses of badiang, cassava and sweetpotato were greatly affected by the surface area and distance between anode and cathode electrodes. An increase of nata-de-coco membrane size in MFC increased the voltage and current by 4.94 and 11.71 times, respectively. Increasing the width of anode also enhanced the responses. Different types of microorganisms were isolated from the biofilm anode of MFC. Their growth and proliferation which corresponded to the generation of electricity were also demonstrated in this study. A total of 54 bacterial isolates were collected from the biofilm at the anode of single-chamber MFC (SCMFC). The generated electricity observed using light emitting diodes (LED) showed potential both for galvanic and microbial fuel cell. The generated regression models are reliable tools in predicting desired outputs for future applications. These promising results demonstrated basic information on the electrical energy recovery from rootcrop waste waters and roots/tubers.


2009 ◽  
Vol 72 (9) ◽  
pp. 2006-2016 ◽  
Author(s):  
BULENT KABAK ◽  
ALAN D. W. DOBSON

Mycotoxins are fungal secondary metabolites that if ingested can cause a variety of adverse effects on both humans and animals, ranging from allergic responses to death. Therefore, exposure to mycotoxins should be minimized. A variety of physical, chemical, and biological methods have been developed for decontamination and/or detoxification of mycotoxins from contaminated foods and feeds. This overview details the latest developments in the biological control of both fungal infection and mycotoxin formation and describes the detoxification of many of the most important mycotoxins by microorganisms. This review also addresses the potential for use of microorganisms as mycotoxin binders in the gastrointestinal tract of both humans and animals, thereby reducing the potential deleterious effects of exposure to these toxins.


2018 ◽  
Vol 251 ◽  
pp. 06005 ◽  
Author(s):  
Nazira Dzhumagulova ◽  
Ilya Svetkov ◽  
Vladimir Smetanin ◽  
Nguyen Dinh Dap

The purpose of the present research was to enhance the efficiency of biological wastewater treatment through the direct impact on the metabolism of activated sludge. In the course of research, species and quantitative composition of biological community of activated sludge in aeration tanks during wastewater purification process was studied. Comparative analysis was carried out for linen production wastewater and household sewage. Possible application of biological treatment in linen production was evaluated. Proposals were developed on creation of controllable biological treatment facility. In this paper, biological methods are shown to be efficient for household sewage treatment. Comparative analysis was carried out for linen production wastewater and household sewage. Possible application of biological treatment in linen production was evaluated. Proposals were developed on creation of controllable biological treatment facility.


2021 ◽  
Vol 33 (10) ◽  
pp. 2260-2266
Author(s):  
B. Aishwarya ◽  
G.S. Vaidyanathan ◽  
Avaya Manivannan ◽  
M. Jaswanth Sha Allan ◽  
Seema A. Kulkarni ◽  
...  

Harmful agents such as toxins, chemicals and pollution are causing public health hazards around the world. The food and agriculture sectors in particular are highly sensitive to exposure to toxic waste. Among the various toxic products of microbial extraction, aflatoxin is a deadly mycotoxin produced by the species Aspergillus. Aflatoxin contamination is common in commercial foodstuffs, veterinary foods as well as in cosmetics. However, some viable strategies related to the screening and detection are considered an important response by the scientific community to prevent early-stage contamination, followed by detection or screening approaches. This article presents current study that emphasizes the effectiveness of biosensors as a good indicator of aflatoxin detection strategies and also the detoxification of the identified aflatoxins, which causes food spoilage and industrial losses by physical, chemical and biological methods


2018 ◽  
Vol 4 (2) ◽  
pp. 61 ◽  
Author(s):  
Isabel Martínez ◽  
Ángel Castillo

Resumen El hipódromo de la Zarzuela, declarado patrimonio histórico nacional, fue construido en Madrid en los años 40, y es una obra del Ingeniero Eduardo Torroja y los arquitectos Arniches y Domínguez. Las cubiertas de su estructura son consideradas un arte desde el punto de vista ingenieril. A pesar del perfecto y genial equilibrio físico y mecánico, se iniciaron procesos físicos y físico-químicos de deterioro en su composición debido al largo periodo de exposición de la estructura a la acción climática y al ataque de los agentes agresivos atmosféricos, entre los cuales se destaca como principal patología la corrosión por carbonatación de su armadura embebida. Dada la importancia de la obra desde el punto de vista artístico, histórico y de seguridad, las autoridades correspondientes decidieron su rehabilitación. En este proyecto de reparación se contempló la instalación de un sistema de monitorización de medidas continuas, mediante sensores electroquímicos pasivos, capaces de indicar el riesgo de corrosión en la armadura embebida de la estructura. De este modo, es posible controlar el comportamiento del material frente a la interacción con la acción atmosférica y prever la posible necesidad de intervenciones de mantenimiento, evitando el avance del deterioro con rapidez y garantías. La implementación de la monitorización requirió de una evaluación mediante técnicas electroquímicas no-destructivas del grado de deterioro previo a la intervención, para poder estudiar la evolución del comportamiento de la estructura después de la reparación. En el presente trabajo, se presentan los resultados obtenidos tanto en la evaluación electroquímica previa en las cubiertas del Hipódromo de la Zarzuela, como su posterior monitorización durante casi 10 años. Se presenta también la viabilidad del sistema de monitorización y su fiabilidad con el tiempo. Abstract La Zarzuela racecourse, declared a national historical heritage, was built in Madrid in the 1940s, and is a work by EngineerEduardo Torroja and the architects Arniches and Domínguez. The covers of its structure are considered an art from the engineeringpoint of view. Despite the perfect and ingenious physical and mechanical balance, physical and physical-chemical processes ofdeterioration in its composition were initiated due to the long period of exposure of the structure to climatic action and the attack ofaggressive atmospheric agents, among which the main pathology is the corrosion by carbonation of its embedded armor. Given theimportance of the work from the artistic, historical and security point of view, the corresponding authorities decided on itsrehabilitation. In this repair project, the installation of a continuous measurement monitoring system was contemplated, using passiveelectrochemical sensors, capable of indicating the risk of corrosion in the structure's embedded reinforcement. In this way, it is possibleto control the behavior of the material against the interaction with atmospheric action and to foresee the possible need for maintenanceinterventions, avoiding the advance of deterioration with speed and guarantees. The implementation of the monitoring required anevaluation by non-destructive electrochemical techniques of the degree of deterioration prior to the intervention, in order to study theevolution of the behavior of the structure after the repair. In the present work, the results obtained in the previous electrochemicalevaluation on the decks of the Hipódromo de la Zarzuela are presented, as well as their subsequent monitoring for almost 10 years.The viability of the monitoring system and its reliability over time are also presented.


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