scholarly journals Design of an efficient, tunable and scalable freestanding flexible membrane for filter application

RSC Advances ◽  
2022 ◽  
Vol 12 (3) ◽  
pp. 1550-1562
Author(s):  
Sumit Kumar Pandey ◽  
Anchal Srivastava
Keyword(s):  
Pore Size ◽  
Human Health ◽  
Water Contamination ◽  
Flexible Membrane

Severe impacts of water contamination on the environment and human health have compelled us to study and design an efficient and reusable filter with tunable pore size.

scholarly journals The Use of Polymer Membranes to Counteract the Risk of Environmental of Soil and Water Contamination

Membranes ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 426
Author(s):  
Anna Rabajczyk ◽  
Maria Zielecka ◽  
Krzysztof Cygańczuk ◽  
Łukasz Pastuszka ◽  
Leszek Jurecki
Keyword(s):  
Ion Exchange ◽  
Human Health ◽  
Water Contamination ◽  
Polymer Membranes ◽  
Environmental Safety ◽  
Exchange Processes ◽  
Soil And Water Contamination ◽  
Soil And Water

Chemical, biological, radiological, or nuclear (CBRN) contamination of the environment is a significant threat to human health and life as well as environmental safety. It is then necessary to take actions aimed at minimizing and eliminating the threat. Depending on the type of contamination, various methods are used, including sorption, biodegradation, separation, or ion exchange processes in which membranes play an important role. The type of membrane is selected in respect of both the environment and the type of neutralized pollutants. Therefore, the production and modification of membranes are being adapted to the type of contamination and the purpose of the work. This article presents examples of membranes and their possible applications depending on the part of the environment subject to reclamation and the type of contamination.

scholarly journals Curbing the Pollution of the Night: The Problem of Light Pollution

2021 ◽  
Vol 4 (2) ◽  
pp. p80
Author(s):  
Sharlene A. McEvoy
Keyword(s):  
Human Health ◽  
Water Contamination ◽  
Environmental Law ◽  
Light Pollution ◽  
Night Sky

One of the least discussed aspects of environmental law is light pollution. Air and water contamination are issues that have been addressed by laws at the federal and state levels but far less attention has been given to the issues of illumination which can have deleterious effects not only on human health but also on the ability to view the night sky. Some states have passed “Dark Skies” laws to remedy these problems.

scholarly journals Investigation into the occurrence of herbicide residues in the rivers of the Acaú-Goiana extractive reserve

2020 ◽  
Vol 11 (2) ◽  
pp. 360-366
Author(s):  
Maria Carolina Silveira Costa Silva ◽  
Henrique Carlos Marinho Pereira da Silva ◽  
Karla Patrícia de Sousa Barbosa Teixeira ◽  
Danilo César Galindo Bedor ◽  
Leila Bastos Leal ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Water Quality ◽  
Human Health ◽  
Surface Waters ◽  
Water Contamination ◽  
Agricultural Practices ◽  
Shrimp Farming ◽  
The North ◽  
Coastal Marine ◽  
Catchment Areas

Brazil is the world’s largest consumer of pesticides and numerous studies have reported damage to both human health and the environment due to exposure and the toxicity of these agrochemicals. Sugarcane crops present the highest herbicide consumption, leaving the margins of large watersheds. In this study, we have investigated the occurrence of herbicides in the surface waters of three different catchment areas, the rivers: Tracunhaém, Três Bocas and Capibaribe Mirim, all located in Goiana, Pernambuco, in a region outstanding for its intense agroindustrial activity, coastal marine biome and areas of shrimp farming. These rivers supply the domestic, industrial and agricultural consumption of around 26 municipalities of the North region of the Zona da Mata in the state of Pernambuco, and has a population of 465,549. Twelve herbicides were investigated in the waters of the Goiana River using the ultra-efficient liquid chromatography technique coupled with triploquadrupole mass spectrometry (UPLC-MS/MS). The study was conducted from March to August 2019 and detected the presence of residues from the herbicides Ametryn, Atrazine, Diuron and Tebuthiuron during March, April and May, in concentrations ranging from 10 to 150 µg L-1. The results indicate the need to monitor surface water contamination, as current agricultural practices have an unprecedented impact on water quality and consequently on ecosystems and human health.

Bonifica, recupero e valorizzazione delle aree industriali dismesse e contaminate: percezioni e preferenze dei cittadini

2009 ◽  
pp. 53-75
Author(s):  
Stefania Tonin ◽  
Margherita Turvani ◽  
Anna Alberini
Keyword(s):  
Human Health ◽  
Water Contamination ◽  
Environmental Risks ◽  
Contaminated Sites ◽  
Recreational Facilities ◽  
Beneficial Effects ◽  
People’S Perception ◽  
Reuse Options ◽  
Soil And Water Contamination ◽  
Soil And Water

- The aim of this paper is to investigate people's perception and preference for the remediation and reuse of industrial brownfields sites. Other main objectives are to investigate if people know about abandoned and contaminated sites and if they understand the potential beneficial effects deriving from cleanup and reuse of these sites. Moreover we want to understand if people perceive soil and water contamination and if they consider themselves exposed to environmental risks caused by contaminated sites. Do they support remediation and reuse initiatives? What are their preferred reuse options? Method and Results In order to understand people's opinions we have administered a questionnaire to the residents in the surroundings of Venice. The questionnaire was selfadministered by the respondents using computers and we collected 400 questionnaires. Conclusions We find that people are very familiar with the problem of contaminated and abandoned sites and they are mainly worried about the effects of contamination on human health and on the general environment. Furthermore, they strongly support future public reuse programs like green parks, cultural and other recreational facilities. They don't appreciate industrial and other productive reuse alternatives.JEL: Q53, R52, I18

Transfer Technique for Electron Microscopy of Membrance Filter Samples

1974 ◽  
Vol 32 ◽  
pp. 554-555
Author(s):  
Lawrence W. Ortiz ◽  
Bonnie L. Isom
Keyword(s):  
Electron Microscopy ◽  
Electron Microscope ◽  
Pore Size ◽  
Membrane Filters ◽  
Size Dependent

A procedure is described for the quantitative transfer of fibers and particulates collected on membrane filters to electron microscope (EM) grids. Various Millipore MF filters (Millipore AA, HA, GS, and VM; 0.8, 0.45, 0.22 and 0.05 μm mean pore size) have been used with success. Observed particle losses have not been size dependent and have not exceeded 10%. With fibers (glass or asbestos) as the collected media this observed loss is approximately 3%.

The microstructure of functionalized poLyacrylonitrile beads for bioseparations

1990 ◽  
Vol 48 (4) ◽  
pp. 1094-1095
Author(s):  
Eduardo A. Kamenetzky ◽  
David A. Ley
Keyword(s):  
Aqueous Solution ◽  
Affinity Chromatography ◽  
Pore Size Distribution ◽  
Pore Size ◽  
Surface Coverage ◽  
Vacuum Impregnation ◽  
Thin Sections ◽  
Selective Staining ◽  
Low Viscosity ◽  
Diamond Knife

The microstructure of polyacrylonitrile (PAN) beads for affinity chromatography bioseparations was studied by TEM of stained ultramicrotomed thin-sections. Microstructural aspects such as overall pore size distribution, the distribution of pores within the beads, and surface coverage of functionalized beads affect performance properties. Stereological methods are used to quantify the internal structure of these chromatographic supports. Details of the process for making the PAN beads are given elsewhere. TEM specimens were obtained by vacuum impregnation with a low-viscosity epoxy and sectioning with a diamond knife. The beads can be observed unstained. However, different surface functionalities can be made evident by selective staining. Amide surface coverage was studied by staining in vapor of a 0.5.% RuO4 aqueous solution for 1 h. RuO4 does not stain PAN but stains, amongst many others, polymers containing an amide moiety.

Lycopene alleviates sulfamethoxazole-induced hepatotoxicity in grass carp (Ctenopharyngodon idellus) via suppression of oxidative stress, inflammation and apoptosis

2020 ◽  
Vol 11 (10) ◽  
pp. 8547-8559
Author(s):  
Hongjing Zhao ◽  
Yu Wang ◽  
Mengyao Mu ◽  
Menghao Guo ◽  
Hongxian Yu ◽  
...  
Keyword(s):  
Oxidative Stress ◽  
Secondary Metabolites ◽  
Human Health ◽  
Grass Carp ◽  
Aquatic Environment ◽  
Ctenopharyngodon Idellus

Antibiotics are used worldwide to treat diseases in humans and other animals; most of them and their secondary metabolites are discharged into the aquatic environment, posing a serious threat to human health.

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