Zhicheng Cai , Wenhao Zhang , Gaohao Liao , Chenhan Huang , Jiamei Wang , Jianhao Zhang
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引用次数: 0
Abstract
Bacteria biofilms are more harmful than their planktonic state and difficult to be completely removed by traditional disinfection technologies. In this study, plasma-activated lactic acid (PALA) were taken to investigate the inhibition efficiency on the formation of Pseudomonas aeruginosa (P. aeruginosa) biofilm. The results showed that the PALA treatment led to a significant accumulation of exogenous reactive oxygen species (ROS) inside the P. aeruginosa cells, companied by decreased activities of antioxidant enzymes including superoxide dismutase (SOD), catalase (CAT), and nitrite reductase (NiR). Fourier infrared spectroscopy and transmission electron microscopy-energy dispersive X-ray spectroscopy analysis revealed that the PALA caused the most notable reduction in carbonyl, amino, and nitrogen compounds in P. aeruginosa. Furthermore, liquid chromatograph mass spectrometer (Lc-ms) results demonstrated that PALA effectively blocked the synthesis of C4-HSL, a signaling molecule in P. aeruginosa. Above all, compared with other treatment solutions, PALA has abundant and stable free radical active species, which can effectively block bacterial signal transduction and population aggregation, thus inhibiting the transformation of bacteria to biofilm state. Therefore, this study could provide a theoretical reference for PALA as a potential biofilm disinfectant.
期刊介绍：
The Journal of Water Process Engineering aims to publish refereed, high-quality research papers with significant novelty and impact in all areas of the engineering of water and wastewater processing . Papers on advanced and novel treatment processes and technologies are particularly welcome. The Journal considers papers in areas such as nanotechnology and biotechnology applications in water, novel oxidation and separation processes, membrane processes (except those for desalination) , catalytic processes for the removal of water contaminants, sustainable processes, water reuse and recycling, water use and wastewater minimization, integrated/hybrid technology, process modeling of water treatment and novel treatment processes. Submissions on the subject of adsorbents, including standard measurements of adsorption kinetics and equilibrium will only be considered if there is a genuine case for novelty and contribution, for example highly novel, sustainable adsorbents and their use: papers on activated carbon-type materials derived from natural matter, or surfactant-modified clays and related minerals, would not fulfil this criterion. The Journal particularly welcomes contributions involving environmentally, economically and socially sustainable technology for water treatment, including those which are energy-efficient, with minimal or no chemical consumption, and capable of water recycling and reuse that minimizes the direct disposal of wastewater to the aquatic environment. Papers that describe novel ideas for solving issues related to water quality and availability are also welcome, as are those that show the transfer of techniques from other disciplines. The Journal will consider papers dealing with processes for various water matrices including drinking water (except desalination), domestic, urban and industrial wastewaters, in addition to their residues. It is expected that the journal will be of particular relevance to chemical and process engineers working in the field. The Journal welcomes Full Text papers, Short Communications, State-of-the-Art Reviews and Letters to Editors and Case Studies
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