Performance of tetramethoxyphenyl porphyrin cobalt(II) (CoTMPP) based stainless steel cathode in the electricigenic permeable reactive barrier for groundwater organic contamination remediation

Abstract

An electricigenic permeable reactive barrier (EPRB) technology was brought forward for remediation of organic-contaminated groundwater, with a benefit that it overcame the limitations of electron acceptor addition in other groundwater remediation methods. To investigate performances of constructions and materials used in EPRB system, several kinds of reactors were designed and prepared in laboratory. Stainless steel wires, a kind of nontoxic, inexpensive and conductive material, were used as basic material of electrode. In order to improve cathodic oxygen reduction capability, a cathode based on tetramethoxyphenyl porphyrin cobalt (II) (CoTMPP) was prepared and studied in this paper. Results showed that a high catalytic activity for oxygen reduction was exhibited by the CoTMPP based cathode, with an electricity generation 3 times as high as that of the naked stainless steel cathode. Some evidence indicated that by loading on the surface of stainless steel wires and heat-treated under anaerobic conditions, epoxy resin, with its curing agents, might have got a catalytic capability for oxygen reduction.

100 years of microbial electricity production: three concepts for the future

“…Nitrobenzene is another compound that was successfully used as a substrate in a BES (Li et al ., 2010). These reactors can be implemented as a flow through mesh anode in an aquifer as proposed by Zhu and colleagues (2009). The practical feasibility of this design should be demonstrated.…”

Síntesis y caracterización de macrociclos orgánicos enlazados covalentemente a la red de óxido de silicio por el método sol-gel

“…Las porfirinas también son estudiadas por su actividad fotocatalítica; se emplearon para la producción de terpenoides [81]. El trabajo realizado por D. Li y colaboradores fue investigar la sensibilidad fotocatalítica de porfirinas sustituidas para degradar cromo acido K azul bajo radiación de luz visible, observaron que la presencia de porfirinas promueve la descomposición del colorante, al término de la reacción la porfirina puede ser recuperada y reutilizada nuevamente [82], otros investigadores estudiaron la fotodegradación de porfirinas para aplicación en fotolitografía [83].…”