Exhaustive conversion of inorganic nitrogen to nitrogen gas based on a photoelectro-chlorine cycle reaction and a highly selective nitrogen gas generation cathode.

07:00 EST 29th December 2017 | BioPortfolio

Summary of "Exhaustive conversion of inorganic nitrogen to nitrogen gas based on a photoelectro-chlorine cycle reaction and a highly selective nitrogen gas generation cathode."

A novel method for the exhaustive conversion of inorganic nitrogen to nitrogen gas was proposed in this paper. The key properties of the system design included an exhaustive photoelectrochemical cycle reaction in the presence of Cl-, in which Cl• generated from oxidation of Cl- by photoholes selectively converted NH4+ to nitrogen gas and some NO3- or NO2-. The NO3- or NO2- was finally reduced to nitrogen gas on a highly selective Pd-Cu-modified Ni foam (Pd-Cu/NF) cathode to achieve exhaustive conversion of inorganic nitrogen to nitrogen gas. The results indicated total nitrogen removal efficiencies of 30 mgL-1 inorganic nitrogen (NO3-, NH4+, NO3-:NH4+=1:1 and NO2-:NO3-:NH4+=1:1:1) in 90 min were 98.2%, 97.4%, 93.1% and 98.4%, respectively, and the remaining nitrogen was completely removed by prolonging the reaction time. The rapid reduction of nitrate was ascribed to the capacitor characteristics of Pd-Cu/NF that promoted nitrate adsorption in the presence of an electric double layer, eliminating repulsion between the cathode and the anion. Nitrate was effectively removed with a rate constant of 0.050 min-1, which was 33 times larger than that of Pt cathode. This system shows great potential for inorganic nitrogen treatment due to the high rate, low cost and clean energy source.


Journal Details

This article was published in the following journal.

Name: Environmental science & technology
ISSN: 1520-5851


DeepDyve research library

PubMed Articles [16891 Associated PubMed Articles listed on BioPortfolio]

The Uncoupled Assimilation of Carbon and Nitrogen from Urea and Glycine by the Bloom-forming Dinoflagellate Prorocentrum minimum.

The spread of harmful dinoflagellate blooms has been linked to the increasing availability of nitrogen, including its dissolved organic forms. The relationships between organic and inorganic nutrient ...

Characterization and prediction of organic nitrogen biodegradability during anaerobic digestion: A bioaccessibility approach.

Prediction of organic nitrogen mineralization into ammonium during anaerobic digestion is required for optimizing substitution of mineral fertilizer by digestates. The aim of this study was to underst...

Effects of Wastewater Nitrogen Concentrations and NH/NO on Nitrogen Removal Ability and the Nitrogen Component of (Vell.) Verdc.

Solution culture experiments were conducted to investigate the effect of wastewater nitrogen levels and NH/NO on nitrogen removal ability and the nitrogen component of . Experiments with three nitroge...

The transformation of nitrogen during pressurized entrained-flow pyrolysis of Chlorella vulgaris.

The transformation of nitrogen in microalgae during entrained-flow pyrolysis of Chlorella vulgaris was systematically investigated at the temperatures of 600-900 °C and pressures of 0.1-4.0 MPa. ...

PPCP degradation by chlorine-UV processes in ammoniacal water: new reaction insights, kinetic modeling and DBP formation.

The combination of chlorine and UV (i.e. chlorine-UV process) has been attracting more attentions in recent years due to its ready incorporation into existing water treatment facilities to remove PPCP...

Clinical Trials [2833 Associated Clinical Trials listed on BioPortfolio]

The Impact of Low Calorie and Low Nitrogen Parenteral Nutrition Support on the Clinical Outcome of Postoperative Patients

The study is designed to investigate the influence of parenteral nutrition (PN) with low nitrogen and calorie supply on the clinical outcome of patients after an operation compared to that...

A Trial Examining the Treatment of Common Warts With Combination Liquid Nitrogen (LN2) and Cantharidin

The purpose of the study was to see if liquid nitrogen, a commonly used treatment for warts, is more effective if it is used alone, or if it is more effective if combined with cantharidin,...


This study evaluates the performance of new technology "CRYOTHERAPY MAINS ET DECOLLETE" against a classic cryotherapy "Nitrogen Liquid " to treat solar lentigines. The hands and the neckl...

Hyperproteic Nutrition:Correlation of BUN to Nitrogen Balance

This study is designed to determine if the following are true. When protein requirements exceed metabolic requirements, blood urea nitrogen(BUN) levels will rise. Elevated BUN levels in t...

Safety and Efficacy of Nitrogen Mustard in Treatment of Mycosis Fungoides

This study will evaluate the efficacy, tolerability and safety of the topical application of nitrogen mustard (NM) ointment formulations in patients with stage I or IIA mycosis fungoides (...

Medical and Biotech [MESH] Definitions

Stable nitrogen atoms that have the same atomic number as the element nitrogen, but differ in atomic weight. N-15 is a stable nitrogen isotope.

The process in certain BACTERIA; FUNGI; and CYANOBACTERIA converting free atmospheric NITROGEN to biologically usable forms of nitrogen, such as AMMONIA; NITRATES; and amino compounds.

Unstable isotopes of nitrogen that decay or disintegrate emitting radiation. N atoms with atomic weights 12, 13, 16, 17, and 18 are radioactive nitrogen isotopes.

The urea concentration of the blood stated in terms of nitrogen content. Serum (plasma) urea nitrogen is approximately 12% higher than blood urea nitrogen concentration because of the greater protein content of red blood cells. Increases in blood or serum urea nitrogen are referred to as azotemia and may have prerenal, renal, or postrenal causes. (From Saunders Dictionary & Encyclopedia of Laboratory Medicine and Technology, 1984)

The circulation of nitrogen in nature, consisting of a cycle of biochemical reactions in which atmospheric nitrogen is compounded, dissolved in rain, and deposited in the soil, where it is assimilated and metabolized by bacteria and plants, eventually returning to the atmosphere by bacterial decomposition of organic matter.

Quick Search


DeepDyve research library

Searches Linking to this Article