Iron Doped TiO2 Photocatalysts for Environmental Applications: Fundamentals and Progress

2014 ◽  
Vol 925 ◽  
pp. 689-693 ◽  
Author(s):  
Nadia Riaz ◽  
Bustam-Khalil Mohamad Azmi ◽  
Azmi Mohd Shariff
Keyword(s):  
Organic Compounds ◽  
Organic Pollutants ◽  
Water Scarcity ◽  
Industrial Wastewater ◽  
Environmental Applications ◽  
Clean Water ◽  
Water And Sanitation ◽  
Recent Advances ◽  
The World ◽  
Iron Doped

One of the most pervasive problems affecting people throughout the world is inadequate access to clean water and sanitation. Problems with water are expected to grow worse in the coming decades, with water scarcity occurring globally. Many recent studies have been reported on the photodegradation of the organic compounds in industrial wastewater in the presence of TiO2 semiconductor as photocatalyst. Heterogeneous photocatalysts using iron as a dopant metal, so far, have been reported for various environmental applications. This paper highlights the recent advances and applications of Fe-TiO2 photocatalysis for the degradation/photodegradation of various pollutants, alkanolamines and other organic pollutants like phenols and dyes.

scholarly journals Water and the death of ambition in global health, c.1970-1990

2020 ◽  
Vol 27 (suppl 1) ◽  
pp. 211-230
Author(s):  
Christian McMillen
Keyword(s):  
Economic Development ◽  
World Bank ◽  
Good Health ◽  
World Health ◽  
Clean Water ◽  
Water And Sanitation ◽  
The World Bank ◽  
The World ◽  
Health Project ◽  
Health Organization

Abstract Economic development and good health depended on access to clean water and sanitation. Therefore, because economic development and good health depended on access to clean water and sanitation, beginning in the early 1970s the World Bank, the World Health Organization (WHO), and others began a period of sustained interest in developing both for the billions without either. During the 1980s, two massive and wildly ambitious projects showed what was possible. The International Drinking Water Supply and Sanitation Decade and the Blue Nile Health Project aimed for nothing less than the total overhaul of the way water was developed. This was, according to the WHO, “development in the spirit of social justice.”

Microbial Bioreactor Systems for Dehalogenation of Organic Pollutants

2018 ◽  
pp. 319-340
Author(s):  
Raghunath Satpathy
Keyword(s):  
Microbial Community ◽  
Organic Compounds ◽  
Organic Pollutants ◽  
Negative Impact ◽  
Degradation Process ◽  
Halogenated Compounds ◽  
Halogenated Organic Compounds ◽  
Degradation Analysis ◽  
The World ◽  
Microbial Groups

Halogenated organic compounds having many beneficial applications, both in industries and agriculture sectors. Basically, the uses are as pesticides, solvents, surfactants, and plastics. However, their large, widespread uses throughout the world have resulted the negative impact on the environment. Considering their treatment process are widely accepted by using the bioreactor systems. The large variety of microorganisms present in the bioreactor and their interaction is the key to the effective treatment and removal of these compounds. Usually the microbes produce the enzymes known as dehalogenase to remove the halogen form the compounds to make it non-toxic. Many of the different steps and about the microbial groups in degradation process of halogenated compounds are well understood, but more details concerning the microbial community are yet to be discovered. This chapter describes about the different dehalogenation systems available in microbes and their ultimate application in different bioreactor systems for the degradation analysis of several harmful halogenated compounds.

scholarly journals Electrochemical Dehalogenation of Organic Pollutants

2017 ◽  
Vol 58 (3) ◽  
Author(s):  
Dennis G. Peters ◽  
Caitlyn M. McGuire ◽  
Erick M. Pasciak ◽  
Angela A. Peverly ◽  
Lauren M. Strawsine ◽  
...  
Keyword(s):  
Electrochemical Reduction ◽  
Organic Compounds ◽  
Organic Pollutants ◽  
Flame Retardants ◽  
Environmental Pollutants ◽  
Halogenated Organic Compounds ◽  
The World ◽  
By Products ◽  
Mediated Reduction

<p>This review summarizes our own research, published since 2004, dealing with electrochemical reduction of halogenated organic compounds that are environmental pollutants. Included are sections surveying the direct and mediated reduction of the following species: (a) chlorofluorocarbons; (b) pesticides, fungicides, and bactericides; (c) flame retardants; and (d) disinfection by-products arising from the chlorination of water. To provide the reader with a perspective of these topics beyond our own work, a total of 238 literature citations, pertaining to studies conducted in numerous laboratories around the world, appears at the end of this review.</p>

Wastewater treatment and nutrient removal in the combined reactor

1998 ◽  
Vol 38 (1) ◽  
pp. 87-95 ◽  
Author(s):  
M. Roš ◽  
J. Vrtovšek
Keyword(s):  
Organic Compounds ◽  
Industrial Wastewater ◽  
Design Procedure ◽  
Order Reaction ◽  
Treated Wastewater ◽  
Nitrification Rate ◽  
Zero Order Reaction ◽  
Aerobic Reactor ◽  
Complex Organic

A combined anaerobic anoxic aerobic reactor for the treatment of the industrial wastewater that contains nitrogen and complex organic compounds as well as its design procedure is presented. The purpose of our experiments was to find a simple methodology that would provide combined reactor design. The reactor is based on the combination of anaerobic, anoxic and aerobic process in one unit only. It was found that the HRT even under 1 hour in the anaerobic zone is long enough for the efficient transformation of complex organic compounds into readily biodegradable COD which is then used in dentrification process. In the N-NO3 concentration range 1.5-50 mg/l the denitrification rate could be expressed as half-order reaction when the CODrb was in excess. N-NO3 removal efficiency is controlled by the recycle flow from the aerobic to the anoxic zone. Nitrification rate can be expressed as first, half or zero-order reaction with respect to effluent N-NH4 concentration. Nitrification rate depends on the dissolved oxygen concentration and hydrodynamic conditions in the reactor. Case study for design of a pilot plant of the combined reactor for treatment of pre-treated pharmaceutical wastewater is shown. Characteristics of pre-treated wastewater were: COD=200 mg/l, BOD5=20 mg/l, N-Kjeldahl=80 mg/l, N-NH4=70 mg/l, N-NOx&lt;1 mg/l, P-PO4=5 mg/l. Legal requirements for treated wastewater were: COD=&lt;100 mg/l, BOD5&lt;5 mg/l, N-NH4=&lt;1 mg/l, N-NOx=&lt;10 mg/l.

scholarly journals Multi-Oxygenated Organic Compounds in Fine Particulate Matter Collected in the Western Mediterranean Area

Atmosphere ◽  
2021 ◽  
Vol 12 (1) ◽  
pp. 94
Author(s):  
Esther Borrás ◽  
Luis Antonio Tortajada-Genaro ◽  
Francisco Sanz ◽  
Amalia Muñoz
Keyword(s):  
Particulate Matter ◽  
Carboxylic Acids ◽  
Organic Compounds ◽  
Organic Pollutants ◽  
Mediterranean Area ◽  
Western Mediterranean ◽  
Anthropogenic Sources ◽  
Gas Chromatography Mass Spectrometry ◽  
Industrial Emissions ◽  
Tetradecanoic Acid

The chemical characterization of aerosols, especially fine organic fraction, is a relevant atmospheric challenge because their composition highly depends on localization. Herein, we studied the concentration of multi-oxygenated organic compounds in the western Mediterranean area, focusing on sources and the effect of air patterns. The organic aerosol fraction ranged 3–22% of the total organic mass in particulate matter (PM)2.5. Seventy multi-oxygenated organic pollutants were identified by gas chromatography–mass spectrometry, including n-alkanones, n-alcohols, anhydrosugars, monocarboxylic acids, dicarboxylic acids, and keto-derivatives. The highest concentrations were found for carboxylic acids, such as linoleic acid, tetradecanoic acid and, palmitic acid. Biomarkers for vegetation sources, such as levoglucosan and some fatty acids were detected at most locations. In addition, carboxylic acids from anthropogenic sources—mainly traffic and cooking—have been identified. The results indicate that the organic PM fraction in this region is formed mainly from biogenic pollutants, emitted directly by vegetation, and from the degradation products of anthropogenic and biogenic volatile organic pollutants. Moreover, the chemical profile suggested that this area is interesting for aerosol studies because several processes such as local costal breezes, industrial emissions, and desert intrusions affect fine PM composition.

Coagulation of organic pollutants by Moringa oleifera protein molecules: In silico approach

2021 ◽  
Author(s):  
Victoria Teniola Adeleke ◽  
Adebayo A Adeniyi ◽  
David Lokhat
Keyword(s):  
Wastewater Treatment ◽  
Organic Pollutants ◽  
In Silico ◽  
Moringa Oleifera ◽  
Seed Protein ◽  
Clean Water ◽  
Protein Extract ◽  
Natural Coagulant ◽  
Global Challenge ◽  
Protein Molecules

Availability of clean water for various activities is a global challenge. Moringa oleifera (MO) seed protein extract has been identified as a natural coagulant for wastewater treatment. The mechanistic understanding...

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