An easily fabricated nano hydroxyapatite modified glassy carbon electrode for degradation of methylene blue

The exploitation of efficient electrocatalyst is significantly important for degradation of refractory organic pollutants. In this paper, we first demonstrated that nano-HAP (nHAP) has good performance and strong stability in...

Plasmonic Bi NPs-accelerated interfacial charge transfer for enhanced solar-driven ciprofloxacin mineralization

High-efficient mineralization of refractory organic pollutants is an admittedly difficult problem for most photocatalytic processes. Herein, a hierarchical type-II heterojunction of Bi2MoO6/Bi/BiOBr-x (BMO/Bi/BOB-x) was successfully fabricated via one-pot solvothermal method....

Boosting Heterogeneous Fenton Reactions for Degrading Organic Dyes via Photothermal Effect under Neutral Conditions

Although heterogeneous Fenton reaction has demonstrated great promise in the remediation of refractory organic pollutants, its widespread application is still limited by the insufficient degradation performance under neutral conditions. Here,...

Decolorization of azo dyes in a heterogeneous persulfate system using FeS as the activator

Textile effluents containing synthetic refractory azo dyes are one of the most important sources of water pollution. However, these kinds of refractory organic pollutants were resistless to a persulfate (PS) oxidation process which was proper activated. In this study, PS was activated by ferrous sulfide (FeS) in a heterogeneous system to decompose azo dyes wastewater. The results showed that all five selected azo dyes were efficiently decomposed by the PS/FeS system, except DY 12, more than 95% of azo dyes were decolored within 60 minutes. The decolorization efficiency of DR 81 in PS/FeS system was comparable to PS activated with heat (60 °C) or Fe2+, and was slightly superior to Fe0 powders under the same conditions. The quenching studies indicated that both SO4−• and •OH were formed in the FeS surface and diffused into the solution to facilitate the successive transformation of DR 81, and •OH reacted with DR 81 might the crucial reaction. The coexisted chelating agents in real azo dyes effluents with high concentration had negative influence on azo dyes decolorization by PS/FeS. However, the superiority of the PS/FeS system was the regenerability and reusability of the heterogeneous catalyst.

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

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...