A new approach, based on dielectrophoresis (DEP), was developed in this work to enhance traditional adsorption for the removal of ammonia nitrogen (NH-N) from wastewater. The factors that affected the removal efficiency were systematically investigated, which allowed us to determine optimal operation parameters. With this new method we found that the removal efficiency was significantly improved from 66.7% by adsorption only to 95% by adsorption-DEP using titanium metal mesh as electrodes of the DEP and zeolite as the absorbent material. In addition, the dosage of the absorbent/zeolite and the processing time needed for the removal were greatly reduced after the introduction of DEP into the process. In addition, a very low discharge concentration (C, 1.5 mg/L) of NH-N was achieved by the new method, which well met the discharge criterion of C < 8 mg/L (the emission standard of pollutants for rare earth industry in China).
Download full-text PDF |
Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6005170 | PMC |
| http://dx.doi.org/10.7717/peerj.5001 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Biosorption of heavy metals by microalgae: hazardous side effects for marine organisms.
Chemosphere
January 2025
ING PAN - Institute of Geological Sciences, Polish Academy of Sciences, Research Centre in Kraków, Senacka 1 Str., PL31002 Kraków, Poland.
Biosorption is nowadays recommended as an ecological and environmentally friendly alternative to remove metals from contaminated regions. Even in situ incubations of algae on the seabed are conducted to investigate potential future ways of reducing metal contamination. Our study investigated the negative effects on microorganisms when metal-enriched algae are released into the marine environment.
View Article and Find Full Text PDFSIRT5 desuccinylating IDH2 to alleviate oxidative stress in bovine mammary epithelial cells induced by ammonia.
Int J Biol Macromol
January 2025
Key Laboratory of Animal Biochemistry and Nutrition, Ministry of Agriculture, College of Veterinary Medicine, Henan Agricultural University, Zhengzhou 450046, Henan, China; Key Laboratory of Veterinary Biotechnology of Henan Province, College of Veterinary Medicine, Henan Agricultural University, Zhengzhou 450046, Henan, China. Electronic address:
Ammonia can cause cells to produce a large amount of reactive oxygen species (ROS), leading to the oxidative stress of cells. As the main intracellular reductant, nicotinamide adenine dinucleotide phosphate (NADPH) plays a crucial role in maintaining reduced glutathione (GSH), helping to remove ROS and protect cells from oxidative damage. Our study demonstrated that SIRT5 desuccinylated isocitrate dehydrogenase 2 (IDH2) to enhance its activity, resulting in increased NADPH production.
View Article and Find Full Text PDFEnhanced prediction of partial nitrification-anammox process in wastewater treatment by developing an attention-based deep learning network.
J Environ Manage
January 2025
School of Artificial Intelligence, Xidian University, No. 2 South Taibai Road, Xi'an, Shaanxi, 710071, China.
In the process of partial nitrification and anaerobic ammonia oxidation (anammox) for nitrogen removal, the process offers simple metabolic pathways, low operating costs, and high nitrogenous loading rates. However, since the partial nitrification-anammox (PN-anammox) process combines partial nitrification and anammox reactions within the same reactor, strict control of dissolved oxygen (DO) is essential. Additionally, assessing treatment performance through chemical measurement involves time lag, making it challenging to recover the biological process when issue arise, especially in the PN-anammox process, where strict DO control and the sensitivity of anammox bacteria to conditions and substrates demand timely intervention.
View Article and Find Full Text PDFInterfacial Water Regulation for Nitrate Electroreduction to Ammonia at Ultralow Overpotentials.
Adv Mater
January 2025
State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing, 100084, China.
Nitrate electroreduction is promising for achieving effluent waste-water treatment and ammonia production with respect to the global nitrogen balance. However, due to the impeded hydrogenation process, high overpotentials need to be surmounted during nitrate electroreduction, causing intensive energy consumption. Herein, a hydroxide regulation strategy is developed to optimize the interfacial HO behavior for accelerating the hydrogenation conversion of nitrate to ammonia at ultralow overpotentials.
View Article and Find Full Text PDFFacile Synthesis of a CuMoO Nanosheet Array for Electrochemical Reduction of Nitrite to Ammonia in Neutral Solution.
ACS Appl Mater Interfaces
January 2025
School of Mechanical Engineering, Chengdu University, Chengdu, Sichuan 610106, China.
Electrochemical nitrite (NO) is a promising technology for NO removal and a sustainable method for generating valuable ammonia (NH), but this process is intricate and generates other byproducts. In this work, we propose a facile and low-cost method for the preparation of a CuMoO nanosheet array, which can serve as an efficient electrocatalyst for the reduction of NO to NH. The morphology of CuMoO can be adjusted by controlling the synthesis conditions.
View Article and Find Full Text PDFWant 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!