Flow-through heterogeneous electro-Fenton system based on the absorbent cotton derived bulk electrode for refractory organic pollutants treatment

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.

Download Full-text

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

Chemistry Journal of Moldova ◽

10.19261/cjm.2008.03(2).14 ◽

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.

Download Full-text

In-situ chemical oxidation: peroxide or persulfate coupled with membrane technology for wastewater treatment

Journal of Materials Chemistry A ◽

10.1039/d1ta01063h ◽

2021 ◽

Author(s):

Huchuan Yan ◽

Cui Lai ◽

Dongbo Wang ◽

Shiyu Liu ◽

Xiaopei Li ◽

...

Keyword(s):

Wastewater Treatment ◽

Organic Pollutants ◽

Health And Safety ◽

Chemical Oxidation ◽

Membrane Technology ◽

In Situ Chemical Oxidation ◽

Refractory Organic Pollutants

Refractory organic pollutants in wastewater have the characteristics of persistence and toxicity, which seriously threaten the health and safety of humans and other organisms. Many researchers have committed to developing...

Download Full-text