Dioxygen in combination with hydrazine: a practical system for degradation of a broad spectrum of toxic organics in water

Microwave-assisted route for the preparation of Pd anchored on surfactant functionalized ordered mesoporous carbon and its electrochemical applications

A microwave-assisted route for rapidly synthesizing Pd nanoparticles assembled on sodium dodecyl sulphate (SDS)-functionalized ordered mesoporous carbon (Pd-SOMC) hybrid nanocomposites has been reported.

The enhancement of completely autotrophic nitrogen removal over nitrite (CANON) by N2H4 addition

The long-term addition of N2H4 to completely autotrophic nitrogen removal over nitrite (CANON) sequencing batch reactors (SBRs) recovered and enhanced their autotrophic nitrogen removal capacity while simultaneously reducing their production of NO3(-). The total nitrogen (TN) removal rate and TN removal efficiency of the process increased from 0.202±0.011 to 0.370±0.016 kg N/m(3)/d and from 65.1±3.75% to 77.4±3.8%, respectively, and the molar ratio of NO3(-) production to NH4(+) removal (MRNN) decreased to 0.058. The most effective concentration of N2H4 addition was approximately 3.99 mg/L. N2H4 could increase the specific growth rate of anaerobic ammonium-oxidizing bacteria (AnAOB) and inhibit aerobic ammonia oxidation. The electrons released from the oxidation of additional N2H4 using hydrazine dehydrogenase (HDH), which substituted the electrons from NO2(-) oxidation to NO3(-), replenished the consumption of AnAOB anabolism and significantly reduced the consequent NO3(-) production.

A novel ion chromatography cycling-column-switching system for the determination of low-level chlorate and nitrite in high salt matrices

A novel ion chromatography cycling-column-switching system was developed for the determination of chlorate and nitrite in high salt matrices. The simple system included a pump, two valves, a single eluent, and a conductivity detector. Both online pre-concentration and matrix elimination were achieved by this method. The target anions were eluted from the concentrator column to the analytical columns circularly. Chloride matrix was then eliminated completely. The method was applied to the determination of low-level chlorate and nitrite in the chloride matrix. Our experimental results demonstrated that this system is of advantages such as high sensitivity, facile automation and simple sample pretreatment, which might be a promising approach for environmental researches and food control.