Semi-permanent hair dyes degradation at W/WO3 photoanode under controlled current density assisted by visible light

2017 ◽  
Vol 20 (2) ◽  
Author(s):  
Luciano Evangelista Fraga ◽  
Thais Tasso Guaraldo ◽  
Bárbara Camila de Araújo Souza ◽  
Maria Valnice Boldrin Zanoni
Keyword(s):  
Water Treatment ◽  
Visible Light ◽  
Environmental Protection ◽  
Human Health ◽  
Current Density ◽  
Water Sources ◽  
Hair Dyes ◽  
Water Treatment Plants ◽  
Beauty Salons ◽  
Dyes Degradation

AbstractThe indiscriminate use of hair dyes has attracted great deal of attention due to its toxicological and mutagenic aspects demonstrated by some of these substances. Thus, the effluent from beauty salons and domestic sewages if not properly treated can reach water treatment plants and water sources, enhancing human health and environmental protection concern. This work explores the application of photoelectrocatalytic process on Basic Brown 16 and Basic Blue 99 degradation as model of basic hair dyes pollutants. W/WO

scholarly journals Ion-capture electrodialysis using multifunctional adsorptive membranes

Science ◽  
2021 ◽  
Vol 372 (6539) ◽  
pp. 296-299
Author(s):  
Adam A. Uliana ◽  
Ngoc T. Bui ◽  
Jovan Kamcev ◽  
Mercedes K. Taylor ◽  
Jeffrey J. Urban ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Water Treatment ◽  
Water Sources ◽  
Clean Water ◽  
Water Treatment Plants ◽  
Porous Aromatic Framework ◽  
Global Demand ◽  
One Step ◽  
Separation Strategy ◽  
Competing Ions

Technologies that can efficiently purify nontraditional water sources are needed to meet rising global demand for clean water. Water treatment plants typically require a series of costly separation units to achieve desalination and the removal of toxic trace contaminants such as heavy metals and boron. We report a series of robust, selective, and tunable adsorptive membranes that feature porous aromatic framework nanoparticles embedded within ion exchange polymers and demonstrate their use in an efficient, one-step separation strategy termed ion-capture electrodialysis. This process uses electrodialysis configurations with adsorptive membranes to simultaneously desalinate complex water sources and capture diverse target solutes with negligible capture of competing ions. Our methods are applicable to the development of efficient and selective multifunctional separations that use adsorptive membranes.

scholarly journals Antibiotic resistance profiles of Escherichia coli isolated from different water sources in the Mmabatho locality, Northwest Province, South Africa

2010 ◽  
Vol 106 (1/2) ◽  
Author(s):  
Constance N. Wose Kinge ◽  
C. Njie Ateba ◽  
D. Tonderai Kawadza
Keyword(s):  
Escherichia Coli ◽  
Antibiotic Resistance ◽  
Water Treatment ◽  
Tap Water ◽  
Water Sources ◽  
Diffusion Method ◽  
Index Test ◽  
E Coli ◽  
Water Treatment Plants ◽  
Different Water Sources

The antibiotic resistance profiles of Escherichia coli (E. coli), isolated from different water sources in the Mmabatho locality were evaluated. Water samples were collected from the local wastewater- and water-treatment plants, the Modimola Dam and homes in the area, and then analysed for the presence of E. coli, using standard methods. Presumptive isolates obtained were confirmed by the analytical profile index test. Antibiotic susceptibility testing was performed by the disc diffusion method. Of the 230 E. coli isolates tested, marked antibiotic resistances (over 70%) were observed for erythromycin, tetracycline, ampicillin, chloramphenicol and norfloxacin. Multiple antibiotic resistance patterns were also compiled. Overall, the phenotype T-Ap-E was frequent for E. coli isolated from the local wastewater and water-treatment plants, Modimola Dam and tap water. Cluster analysis performed showed a unique antibiotic resistance pattern which suggested a link between isolates from all sampling points. The findings indicated that improper wastewater treatment may have a potential impact on the dissemination and survival of E. coli, as well as other pathogenic bacteria in water for human and animal consumption. This may result in water- and food-borne disease outbreaks with a negative effect on antibiotic therapy.

scholarly journals Impact of industrial waste water treatment plants on Dutch surface waters and drinking water sources

2018 ◽  
Vol 640-641 ◽  
pp. 1489-1499 ◽  
Author(s):  
Annemarie P. van Wezel ◽  
Floris van den Hurk ◽  
Rosa M.A. Sjerps ◽  
Erwin M. Meijers ◽  
Erwin W.M. Roex ◽  
...  
Keyword(s):  
Waste Water ◽  
Drinking Water ◽  
Water Treatment ◽  
Surface Waters ◽  
Industrial Waste ◽  
Waste Water Treatment ◽  
Water Sources ◽  
Industrial Waste Water ◽  
Water Treatment Plants ◽  
Waste Water Treatment Plants

Determination of natural radionuclides in waste generated in the potable water treatment plants of the Zona da Mata of the state of Pernambuco- Brazil

2019 ◽  
Vol 7 (2A) ◽  
Author(s):  
Adriana Muniz De Almeida Albuquerque
Keyword(s):  
Water Treatment ◽  
Potable Water ◽  
Natural Radionuclides ◽  
The United States ◽  
Radioactive Material ◽  
Human Consumption ◽  
Radiological Protection ◽  
Natural Occurrence ◽  
Water Treatment Plants ◽  
Potable Water Treatment

The water purification procedure aims to obtain a product appropriate for human consumption, minimizing the presence of contaminants and toxic substances present in the water. Among these contaminants, some radionuclides of natural origin, such as uranium, thorium and their descendants, have been identified. Studies have shown that the stages of purification are quite effective in removing the radionuclides contained in water. The removal is due to co-precipitation of the radionuclides with the suspended materials and the precipitated material is accumulated and characterized as a Technologically Concentrated Natural Occurrence Radioactive Material (TENORM) by the United States Environmental Protection Agency (USEPA). This residue can present significant levels of radioactivity and, when discarded in the environment without any treatment, can generate a problem of environmental impact and a risk to the health of the population. In this way, some gamma emitters of the series of U, Th and the K-40 were determined in the residues generated at the Potable Water Treatment Plants – PWTPs in six municipalities of Pernambuco. The results obtain corroborate the classification of the residues generated in the PWTPs as concentrators of the radioactive components contained in the water supplied to the system and reinforce the need for the release to the environment, which is the usual way of disposal of this waste, to be carried out only after considering the radiological protection standards established.

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