The Green Use of Persulfate Electrochemically Generated with Diamond Electrodes for Depolluting Soils
At a Glance
Section titled âAt a Glanceâ| Metadata | Details |
|---|---|
| Publication Date | 2021-10-19 |
| Journal | ECS Meeting Abstracts |
| Authors | Karla Caroline de Freitas AraĂşjo, Karyn N. Silva, Djalma Ribeiro da Silva, Marco A. QuirĂłz, Carlos A. MartĂnezâHuitle |
| Institutions | Universidade Federal do Rio Grande do Norte, Universidad de las AmĂŠricas Puebla |
| Citations | 3 |
Abstract
Section titled âAbstractâFrom an environmental point of view, a wide range of organic pollutants of different nature have been studied by using BDD-SO42â/SO4â˘â/S2O82â systems, such as pharmaceuticals, pesticides, herbicides, dyes, petroleum hydrocarbons, industrial chemicals and so on, considering synthetic and real effluents as well as to treat effluents generated during the treatment of soil matrices (by using soil washing, electrokinetic soil remediation or soil flushing). Also, similar approaches have been investigated as alternatives for microorganismâs inactivation by electrodisinfection or food control applications. Note that when BDD-SO42â/SO4â˘â/S2O82â systems are used, heterogenous â˘OH are electrochemically generated in concomitance. Although â˘OH is a very reactive oxidizer, it has an important limitation, a very short half-life; so, it is necessary that the species to be oxidized is very close to the electrode surface (Nernst layer). Meanwhile, it is well-known that persulfate has a half-life greater than that of the â˘OH, and its stability favors solution diffusion. Then, BDD-SO42â/SO4â˘â/S2O82â and BDD/heterogenous-(â˘OH) systems have been mainly used as in-situ approaches (when the water matrices contain SO4â˘â and S2O82â precursors dissolved as well as the target pollutant or microorganisms to be eliminated). From the aforementioned BDD-SO42â/SO4â˘â/S2O82â system features and advantages, no information has been published yet regarding the storage capacity and service-life solution, after its electrochemical synthesis with BDD. For this reason, the objective of this work is to produce the persulfate electrochemically and evaluate these parameters to propose BDD-SO42â/SO4â˘â/S2O82â system as an ex-situ oxidation tool for environmental applications, for example, soil washing.