02959nas a2200241   4500008004100000022001400041245014000055210006900195260000800264300001100272490000700283520213400290653001702424653001502441653001702456653000802473653002002481100001902501700002402520700002102544700002202565856013002587       2020                        eng d  a1350-417700aDestroying antimicrobial resistant bacteria (AMR) and difficult, opportunistic pathogen using cavitation and natural oils/plant extract0 aDestroying antimicrobial resistant bacteria AMR and difficult op  cDEC  a1052720 v693 a<p>The present study reports, for the first time, a new and techno-economic strategy for effective removal of antimicrobial resistant bacteria (AMR) and difficult, opportunistic pathogen using cavitation and natural oils/plant extract. A hybrid methodology using natural oils of known health benefits has been discussed in combination with conventional physico-chemical method of hydrodynamic cavitation that not only provides efficient and effective water disinfection, but also eliminates harmful effects of conventional methods such as formation of disinfection by-products apart from reducing cost of treatment. A proof-of concept is demonstrated by achieving exceptionally high rates for practically complete removal of antimicrobial resistant (AMR) and relatively less researched, gram-negative opportunistic pathogen, Pseudomonas aeruginosa and gram-positive methicillin resistant, Staphylococcus aureus using a natural oil-Peppermint oil and two different cavitating reactors employing vortex flow (vortex diode) and linear flow (orifice) for hydrodynamic cavitation. &gt; 99% disinfection could be obtained, typically in less than 10 min, using vortex diode with operating pressure drop of 1 bar and low dose of 0.1% peppermint oil as an additive, depicting very high rates of disinfection. The rate of disinfection can be further increased by using simple aeration which can result in significant lowering of oil dose. The conventional device, orifice requires relatively higher pressure drop of 2 bar and comparatively more time (similar to 20 min) for disinfection. The cost of the disinfection was also found to be significantly lower compared to most conventional processes indicating techno-economic feasibility in employing the developed hybrid method of disinfection for effectively eliminating bacteria including AMR bacteria from water. The developed approach not only highlights importance of going back to nature for not just conventional water disinfection, but also for eliminating hazardous AMR bacteria and may also find utility in many other applications for the removal of antimicrobial bacteria.</p>
10aAMR bacteria10aCavitation10aDisinfection10aOil10aWater treatment1 aMane, Maya, B.1 aBhandari, Vinay, M.1 aBalapure, Kshama1 aRanade, Vivek, V.  uhttps://library.ncl.res.in/content/destroying-antimicrobial-resistant-bacteria-amr-and-difficult-opportunistic-pathogen-using02440nas a2200265   4500008004100000022001400041245011000055210006900165260000800234300001400242490000700256520159200263653001501855653001201870653001701882653001601899653001701915653001501932100002101947700001901968700002001987700002102007700002402028856012202052       2023                        eng d  a1618-954X00aDevelopment of multipurpose biomass-derived adsorbents using Coccinia grandis for removal of contaminants0 aDevelopment of multipurpose biomassderived adsorbents using Cocc  cDEC  a3393-34050 v253 a<p>The present study is an attempt to develop newer multipurpose biomass-derived adsorbents for water and wastewater treatment; biomass that are easily available, renewable and most importantly, sustainable. A model adsorbent was developed using Coccinia grandis (CG, Ivy gourd) and further modified by impregnating copper nanoparticles (CG-Cu). The adsorbent characterization was done for evaluating surface morphology, surface area and metal modification. The utility of the newer adsorbents was established for the removal of different contaminants such as dyes (cationic Malachite Green, anionic Congo Red and fluorescent cationic Rhodamine B), Active Pharmaceutical Ingredient pollutant (Ciprofloxacin) and also for the removal of pathogenic bacteria, Gram-negative Escherichia coli. Both CG and CG-Cu bio-nanocomposite were highly effective in removal of different contaminants, 99% dye removal for Malachite Green, with a high adsorption capacity of 49 mg/g, higher than that for commercial activated charcoal whereas for all other dyes, the performance of CG-Cu was similar. The isotherm studies indicated multilayer adsorption, in general. A good adsorption capacity of 10.8 mg/g was also observed for the removal of ciprofloxacin. The combined effect of the bio-nanocomposite, CG-Cu was impressive and 100% disinfection was achieved within 10 min, due to the antimicrobial activity of Cu and oxidation effect of reactive oxygen species enhancing the disinfection.Graphical abstractMultipurpose biomass derived adsorbents using Coccinia grandis for removal of contaminants</p>
10aAdsorption10aBiomass10aDisinfection10adye removal10ananomaterial10aSeparation1 aRaj, Surabhi, S.1 aMane, Maya, B.1 aThanekar, Pooja1 aBalapure, Kshama1 aBhandari, Vinay, M.  uhttps://library.ncl.res.in/content/development-multipurpose-biomass-derived-adsorbents-using-coccinia-grandis-removal