AI Article Synopsis
- A plasma reactor effectively degraded chlorinated hydrocarbons, specifically chloroform, achieving over 99% destruction efficiency with a power supply of ~4kW and oxygen as a carrier gas.
- Liquid waste was injected at rates up to 400 g/h, leading to minimal toxic byproducts (<1 g/h) and confirming safety through testing for harmful compounds.
- Final outputs were primarily CO(2) and H(2)O, with chlorinated acids being converted into mineral salts, aligning closely with predicted thermodynamic outcomes.
Article Abstract
The performance of a plasma reactor for the degradation of chlorinated hydrocarbon waste is reported. Chloroform was used as a target for a recently patented destruction process based using an inductive plasma torch. Liquid waste was directly injected axially into the argon plasma with a supplied power of ~4kW in the presence of oxygen as oxidant and carrier gas. Decomposition was performed at CHCl(3) feed rates up to 400 g h(-1) with different oxygen/waste molar ratios, chloroform destruction was obtained with at least 99% efficiency and the energy efficiency reached 100 g kWh(-1). The conversion end products were identified and assayed by online FTIR spectroscopy (CO(2), HCl and H(2)O) and redox titration (Cl(2)). Considering phosgene as representative of toxic compounds, only very small quantities of toxics were released (<1 g h(-1)) even with high waste feed rates. The experimental results were very close to the equilibrium composition predicted by thermodynamic calculations. At the bottom of the reactor, the chlorinated acids were successfully trapped in a scrubber and transformed into mineral salts, hence, only CO(2) and H(2)O have been found in the final off-gases composition.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1016/j.jhazmat.2012.10.072 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Reinforcing Bus Living Space with Recycled Carbon Fibers from Expired Prepreg in the Aircraft Industry.
Materials (Basel)
December 2024
Mechanical Engineering Department, Universidad Carlos III de Madrid, 28911 Leganés, Spain.
Due to increasing mobility and energy conservation needs, improving bus and coach safety without adding weight is essential. Many crashes with fatal outcomes for vehicle occupants are associated with the rollover of the vehicle, revealing the structural weakness of the steel pillars between windows, which must resist high levels of bending during rollovers. This study aims to reinforce these pillars with expired carbon fiber prepreg from the aircraft industry, improving safety and reducing environmental waste.
View Article and Find Full Text PDFMicrowave plasma torch desorption ionization mass spectrometry for chemical characterization of aromatic secondary organic aerosol.
Talanta
February 2025
Department of Chemistry, Zhejiang University, Hangzhou, 310058, Zhejiang, China.
Benzene and toluene, primarily emitted from vehicle exhaust, are common volatile organic compounds (VOCs). These aromatic compounds in the atmosphere undergo further photooxidation to form secondary organic aerosol (SOA), which are a primary factor in haze weather. Aromatic SOA is more difficult to detect by traditional detection methods.
View Article and Find Full Text PDFCombined detection of serum adiponectin and pregnancy-associated plasma protein A for early prediction of gestational diabetes mellitus.
Medicine (Baltimore)
October 2024
Department of Laboratory Medicine, Zhongshan City People's Hospital, Zhongshan, China.
Early diagnosis of gestational diabetes mellitus (GDM) reduces the risk of adverse perinatal and maternal outcomes. At present, the value of serum adiponectin (ADP) and pregnancy-associated plasma protein A (PAPP-A) in clinical practice for the diagnosis of GDM in early pregnancy is unclear. To investigate the predictive value of serum ADP and PAPP-A in GDM.
View Article and Find Full Text PDFEfficient electro-oxidation-based degradation of per- and polyfluoroalkyl (PFAS) persistent pollutants by using plasma torch synthesized pure-Magnéli phase-TiO anodes.
J Environ Manage
November 2024
Institut National de la Recherche Scientifique (INRS) - Centre Eau Terre Environnement (ETE), 490 rue de la Couronne, Québec, QC, G1K 9A9, Canada. Electronic address:
Article Synopsis
- Pure Magnéli-phase TiO coatings were created using a Plasma Torch method and tested for their effectiveness in degrading harmful pollutants like PFOA and PFOS in water, achieving degradation efficiencies of up to 99.7% under optimized conditions.
- Analysis methods (X-ray diffraction, Raman spectroscopy, and scanning electron microscopy) confirmed the unique structure and high surface area of the coatings, contributing to their effectiveness compared to traditional anodes.
- Using the optimal electro-catalytic oxidation process, the researchers also treated real wastewater with multiple PFAS compounds, achieving substantial degradation rates for some pollutants, demonstrating the potential for this method in environmental cleanup.
Evaluating the impact of platelet-rich plasma injection in spinal endoscopic nucleotomy on MRI pfirrmann grading and clinical outcomes in lumbar disc herniation.
J Orthop Surg Res
October 2024
Department of Orthopaedics, Zhongshan Torch Development Zone People's Hospital, Zhongshan, 528437, Guangdong, China.
Background: This study investigates the clinical efficacy and safety of percutaneous endoscopic nucleotomy combined with platelet-rich plasma (PRP) injection in treating lumbar disc herniation (LDH) in young and middle-aged adults.
Methods: From April 2022 to September 2023, 60 patients diagnosed with LDH were randomly divided into two groups (n = 30/group). The observation group underwent percutaneous endoscopic nucleotomy combined with autologous PRP gel injection into the disc, while the control group underwent percutaneous endoscopic nucleotomy alone.
Want AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!