The flow of homogeneous fluids through porous media: analogies with other physical problems

Fluoride removal from water by adsorption—A review

Antibiotics, disinfectants and bacteria resistant to them have been detected in environmental compartments such as waste water, surface water, ground water, sediments and soils. Antibiotics are released into the environment after their use in medicine, veterinary medicine and their employment as growth promoters in animal husbandry, fish farming and other fields. There is increasing concern about the growing resistance of pathogenic bacteria in the environment, and their ecotoxic effects. Increasingly, antibiotic resistance is seen as an ecological problem. This includes both the ecology of resistance genes and that of the resistant bacteria themselves. Little is known about the effects of subinhibitory concentrations of antibiotics and disinfectants on environmental bacteria, especially with respect to resistance. According to the present state of our knowledge, the impact on the frequency of resistance transfer by antibacterials present in the environment is questionable. The input of resistant bacteria into the environment seems to be an important source of resistance in the environment. The possible impact of resistant bacteria on the environment is not yet known. Further research into these issues is warranted.

Resistance in the Environment

http://edge.rit.edu/content/P13418/public/Reference%20Documents/Fluoride%20Removal/Review%20of%20fluoride%20removal%20from%20drinking%20water.pdf

Review of fluoride removal from drinking water.

wastewater engineering treatment disposal and reuse is available in our digital library an online access to it is set as public so you can download it instantly. Our books collection hosts in multiple countries, allowing you to get the most less latency time to download any of our books like this one. Kindly say, the wastewater engineering treatment disposal and reuse is universally compatible with any devices to read.

Wastewater Engineering Treatment Disposal And Reuse

Solar-driven hybrid photo-Fenton degradation of persistent antibiotic ciprofloxacin by zinc ferrite-titania heterostructures: degradation pathway, intermediates, and toxicity analysis

Municipal wastewater has been considered as one of the largest contributors and carriers of microplastics to the aquatic environment. However, the various residential activities that generate municipal wastewater are equally significant whenever the source of microplastics in aquatic system is accounted. However, so far, only municipal wastewater has received wide attention in previous review articles. Hence, this review article is written to address this gap by highlighting, firstly, the chances of microplastics arising from the usage of personal care products (PCPs), laundry washing, face masks, and other potential sources. Thereafter, the various factors influencing the generation and intensity of indoor microplastic pollution and the evidence available on the possibility of microplastic inhalation by humans and pet animals are explained. Followed by that, the removal efficiency of microplastics observed in wastewater treatment plants, the fate of microplastics present in the effluent and biosolids, and their impact on aquatic and soil environment are explored. Furthermore, the impact of aging on the characteristics of microsized plastics has been explored. Finally, the influence of age and size of microplastics on the toxicity effects and the factors impacting the retention and accumulation of microplastics in aquatic species are reviewed. Furthermore, the prominent pathway of microplastics into the human body and the studies available on the toxicity effects observed in human cells upon exposure to microplastics of different characteristics are explored. 

/pdf/residential-houses-a-major-point-source-of-microplastic-19rj7icq.pdf

Residential houses — a major point source of microplastic pollution: insights on the various sources, their transport, transformation, and toxicity behaviour

ABSTRACT The generation of personal protective equipment (PPE) waste due to the impact of COVID has increased multi-fold globally. In this study, pyrolysis of polyolefin-based PPEs was carried out using a bench-scale reactor of 2 kg per batch capacity. Thermogravimetric (TGA) analysis of face masks was carried out to identify the optimal parameters for the pyrolysis process. Different combinations of catalysts (ZSM-5 and montmorillonite), catalyst to feed ratio (2.5% and 5%), experiment duration (2 h and 3 h), and process temperature (450°C and 510°C) were tested to determine the maximum yield of the pyrolysis oil. The oil and char obtained from the pyrolysis of PPEs were analyzed for its gross calorific value (GCV), elemental analysis (CHNS), and chemical composition. Based on the experiments conducted, the optimum pyrolysis temperature, catalyst, catalyst to feed ratio, and batch time for maximum oil yield (55.9% w/w) were determined to be 510°C, ZSM-5, 5%, and 2 hours, respectively. Oil was free of sulfur and had a calorific value of 43.7 MJ/kg, which is comparable to commercial diesel fuel and makes it a suitable alternative fuel for ships, boilers, and furnaces.

Thermo-Chemical conversion of polyolefin-based facemask using bench-scale pyrolysis system

EfectroH2O: Development and evaluation of a novel treatment technology for high-brine industrial wastewater.

The development of novel single-pot technologies to address multiple complications is always challenging in the contemporary world. The current research work intends to assess the hydrogen generation system along with the simultaneous chromium removal. The method of in-situ formation of zero-aluminium (Al(0)) nanoparticles is accomplished in an aqueous medium with the aid of aluminium salt and sodium borohydride. This multifunctional process can completely remove hexavalent chromium (Cr(VI)) along with concurrent maximum hydrogen generation rate of 550 mL/min at pH 3.0. The experimental analyses are done to scrutinize the effect of parameters such as reactant chemicals dosage, pH conditions, initial Cr(VI) concentration, temperature, presence of organic carbon as phenol, and water matrices on the reduction of Cr(VI) and hydrogen production. The results elucidate that the process can be widely utilized in the range of pH 3.0 – 11.0; the maximum hydrogen yield was improved from 150 to 570 mL/min and the Cr(VI) removal efficiency was improved from 94.8% to 100% by changing the quantity of aluminium salt from 0.1 to 0.6 g per 50 mL of Cr(VI) containing artificial wastewater. Cr(VI) in conjunction with phenol removal studies along with simultaneous hydrogen generation is also explored, featuring this technology as energy positive for the co-removal of pollutants. 

Indumathi M. Nambi

Papers

Solar-driven hybrid photo-Fenton degradation of persistent antibiotic ciprofloxacin by zinc ferrite-titania heterostructures: degradation pathway, intermediates, and toxicity analysis

Residential houses — a major point source of microplastic pollution: insights on the various sources, their transport, transformation, and toxicity behaviour

Thermo-Chemical conversion of polyolefin-based facemask using bench-scale pyrolysis system

EfectroH2O: Development and evaluation of a novel treatment technology for high-brine industrial wastewater.

In situ growing of zero-valent aluminium nanoparticles for the concurrent hydrogen production and chromium removal from artificial wastewater