Influence of nitrogen speciation on Cd-induced toxicity in .

Nitrogen (N) plays an important role in plant growth and developmental metabolic processes, research on nitrogen speciation regulating Cd accumulation in duckweed is still limited. In this study, the effects of three nitrogen sources (NHCl, Ca(NO) and NHNO) on the growth, Cd accumulation, and photosynthetic parameters of ( ) were analyzed. The results showed that Cd enrichment in was significantly reduced ( 0.

Effective oxidation decomplexation of Cu-EDTA and Cu electrodeposition from PCB manufacturing wastewater by persulfate-based electrochemical oxidation: Performance and mechanisms.

Complex wastewater matrices such as printed circuit board (PCB) manufacturing wastewater present a major environmental concern. In this work, simultaneous decomplexation of metal complex Cu-EDTA and reduction/electrodeposition of Cu was conducted in a persulfate-based electrochemical oxidation system. Oxidizing/reductive species were simultaneously produced in this system, which realized 99.

Novel Magnetic MnFeO-Decorated Graphite-Like Porous Biochar as a Heterogeneous Catalyst for Activation of Peroxydisulfate Toward Degradation of Rhodamine B.

A magnetic MnFeO-modified graphite-like porous biochar composite (MnFeO/KFS800) was synthesized by the hydrothermal method, and its catalytic activity was evaluated in the activation of peroxydisulfate toward degradation of Rhodamine B. After characterization by SEM, XRD, and the BET method, the specific surface area and total pore volume of the MnFeO/KFS800 catalyst reached 121 m/g and 0.263 m/g, and exhibited plate-like morphology with good crystallinity.

Acetaminophen degradation in aqueous solution by the UV-LED-EC/Cl process.

In this study, electrochemically generated free chlorine (EC/Cl2) was activated by UV irradiation with a light emitting diode (LED) lamp at 275 nm to degrade acetaminophen (AAP, 2 μM) in aqueous solution. The potential at a RuO2-IrO2/Ti plate anode was set at 1.5 V vs.

Large-scale screening and characterization of Cd accumulation and ultrastructural deformation in duckweed.

Cadmium (Cd) pollution in soil, rivers and lakes is a serious problem due to the current industrialization and urbanization in China. Duckweeds are recognized as promising species for Cd phytoremediation. However, intraspecific variations in Cd accumulation in duckweeds remain largely unknown.

RETRACTED: Preparation of molecularly imprinted metal-organic frameworks by in situ self-assembly template strategy for selective adsorption of antibiotics.

This article has been retracted: please see Elsevier Policy on Article Withdrawal ( https://www.elsevier.com/about/our-business/policies/article-withdrawal).

Polypyrrole modified magnetic reduced graphene oxide composites: synthesis, characterization and application for selective lead adsorption.

To enhance the ability to remove lead from water, polypyrrole modified magnetic FeO/reduced graphene oxide composites (PPy-FG) were prepared polymerization and employed for the Pb(ii) adsorption. The physicochemical structure and adsorption mechanism of the prepared magnetic PPy-FG were studied vibrating sample magnetometer, X-ray diffraction, scanning electron microscopy, Fourier transform infrared spectroscopy, Brunauer-Emmett-Teller analysis, and X-ray photoelectron spectroscopy. The effects of several factors on Pb(ii) adsorption were evaluated, including pH value, temperature, and competitive ions.

Synthesis of mesoporous magnetic MnFeO@CS-SiO microsphere and its adsorption performance of Zn and MB studies.

Because of its superior physical and chemical properties, MnFeO is regarded as one of the best magnetic material alternatives for FeO. However, MnFeO alone cannot remove heavy metal ions and dyes. Here, we report on a new mesoporous magnetic MnFeO@CS-SiO microsphere material that was synthesised via the hydrothermal method to remove Zn and methylene blue (MB) in simulated textile wastewater.

Advanced landfill leachate biochemical effluent treatment using Fe-Mn/AC activates O/NaSO process: process optimization, wastewater quality analysis, and activator characterization.

A novel catalyst of Fe-Mn/AC was prepared and used as a heterogeneous catalyst to activate O/NaSO for landfill leachate biochemical effluent treatment. The experimental results indicated that the highest COD (84%) and color (98%) removal was obtained at Fe-Mn/AC dosage 1.2 g/L, O concentration 1.

Treatment of landfill leachate biochemical effluent using the nano-FeO/NaSO system: Oxidation performance, wastewater spectral analysis, and activator characterization.

Nano-FeO was used as heterogeneous catalyst to activate NaSO for the generation of the sulfate radicals (SO) to oxidize the residual pollutants in landfill leachate biochemical effluent. The oxidation performance, wastewater spectral analysis and activator characterization were discussed. Oxidation experimental result shows that nano-FeO has obvious catalytic effect on NaSO and can significantly enhance the oxidation efficiencies of NaSO on landfill leachate biochemical effluent, with COD and color removals above 63% and 95%, respectively.

Assembly of coupled redox fuel cells using copper as electron acceptors to generate power and its in-situ retrieval.

Energy extraction from waste has attracted much interest nowadays. Herein, a coupled redox fuel cell (CRFC) device using heavy metals, such as copper, as an electron acceptor is assembled to testify the recoveries of both electricity and the precious metal without energy consumption. In this study, a NaBH4-Cu(II) CRFC was employed as an example to retrieve copper from a dilute solution with self-electricity production.

Self-powered denitration of landfill leachate through ammonia/nitrate coupled redox fuel cell reactor.

In order to explore the feasibility of energy-free denitrifying N-rich wastewater, a self-powered device was uniquely assembled, in which ammonia/nitrate coupled redox fuel cell (CRFC) reactor was served as removing nitrogen and harvesting electric energy simultaneously. Ammonia is oxidized at anodic compartment and nitrate is reduced at cathodic compartment spontaneously by electrocatalysis. In 7.

Adsorption behavior and mechanisms of ciprofloxacin from aqueous solution by ordered mesoporous carbon and bamboo-based carbon.

The performances of ordered mesoporous carbon CMK-3 (OMC), bamboo-based carbon (BC), and these two kinds of adsorbents modified by thermal treatment in the ammonia atmosphere at high temperatures were evaluated for the removal fluoroquinolone antibiotic (ciprofloxacin) from aqueous solution. The adsorption behavior of ciprofloxacin (CIP) onto OMC and BC including adsorption isotherms and kinetics were investigated. The effect of various factors (pH, ionic strength and temperature) on the adsorption process was also investigated.