Special Issue "Solar Detoxification of Wastewater"

A special issue of Processes (ISSN 2227-9717). This special issue belongs to the section "Environmental and Green Processes".

Deadline for manuscript submissions: closed (30 April 2019) | Viewed by 3604

Special Issue Editors

School of Energy and Environment, Thapar Institute of Engineering and Technology, Patiala 147004, India
Interests: solar detoxification of wastewater: design of solar collectors; novel fixed-bed studies with reactor designing; water disinfection using advanced oxidation processes; photo-fenton treatment using waste materials as iron source and reactor designing; degradation of pesticides, PAH, dyes and phenols; eco-sanitation
Lab. Physical Chemistry, Department of Chemistry, Aristotle University of Thessaloniki, Thessaloniki, Greece
Interests: heterogeneous and homogeneous photocatalysis; photoelectrochemistry of semiconductors/photoelectrochemical solar cells; solar detoxification and disinfection of wastewaters and drinking water; environmental photochemistry; photo-fenton, sonolysis, supercritical water oxidation

Special Issue Information

Dear Colleagues,

The subsequent and rampant use of synthetic compounds in process industries has led to occurrence of these bio-recalcitrant compounds in surface waters/drinking water. Most of these contaminants are persistent to environment and escalates the worldwide pollution of aquatic systems. Generally, it has become one of the life-threatening environmental problems that needs to be addressed immediately. In spite of many published works regarding the presence of these contaminants, even in drinking water, the conventional treatment methods are being relied in most of the countries. Replacement of traditional water treatment methods with efficient advanced, water-treatment technologies is needed to improve the quality of treated water. Various advanced oxidation processes (AOPs), including heterogeneous photocatalysis and homogenous photo-Fenton processes, have proven their effectiveness for wastewater detoxification. However, the artificial sources of UV radiation in these treatment processes cause the majority of the maintenance and operating costs of the treatment unit, due to the consumption and regular replacement of UV lamps. Therefore, using natural solar radiation instead of artificial lamps is an environmentally-attractive and economical solution for photocatalysis or photo-Fenton-like processes. The applications of solar-driven photocatalytic reactors fit well for countries that receives immense amounts of solar light throughout the year. Besides, solar treated water find applications in heat exchanger employed in diverse fields of engineering - be it electronic cooling, automotive engine cooling, HVAC etc. Solar treated water when mixed with nanofluids serves as coolants in heat exchangers and have attracted significant focus of the researchers. 

This Special Issue on "Solar Detoxification of Wastewater and Its Subsequent Applications" seeks high-quality works and topics focusing on the latest novel wastewater treatment processes using solar radiation, including, but not limited to, photocatalytic treatment, photo-Fenton, biological, water disinfection, oxidation, filtration, purification, etc., as well as practical applications of these technologies.

Dr. Anoop Verma
Prof. Dr. Ioannis Poulios
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Processes is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2400 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • Water/waste water treatment
  • Photocatalytic treatment
  • photo-Fenton treatment
  • Biological treatment
  • Water disinfection
  • Oxidation
  • Filtration
  • Purification
  • Nanofluids
  • heat exchanger
  •  heat sinks

Published Papers (1 paper)

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Research

Article
Photocatalytic Inactivation of Enterobacter cloacae and Escherichia coli Using Titanium Dioxide Supported on Two Substrates
Processes 2018, 6(9), 137; https://doi.org/10.3390/pr6090137 - 23 Aug 2018
Cited by 5 | Viewed by 3411
Abstract
The antibacterial photocatalytic activity of TiO2 supported over two types of substrates, borosilicate glass tubes (TiO2/SiO2-borosilicate glass tubes (BGT)) and low-density polyethylene pellets (TiO2-LDPE pellets), which were placed in a compound parabolic collectors (CPC) reactor, was [...] Read more.
The antibacterial photocatalytic activity of TiO2 supported over two types of substrates, borosilicate glass tubes (TiO2/SiO2-borosilicate glass tubes (BGT)) and low-density polyethylene pellets (TiO2-LDPE pellets), which were placed in a compound parabolic collectors (CPC) reactor, was evaluated against Enterobacter cloacae and Escherichia coli under sunlight. Three solar photocatalytic systems were assessed, suspended TiO2, TiO2/SiO2-BGT and TiO2-LDPE pellets, at three initial bacterial concentrations, 1 × 105; 1 × 103; 1 × 101 CFU/mL of E. coli and total bacteria (E. cloacae and E. coli). The solar photo-inactivation of E. coli was achieved after two hours with 7.2 kJ/L of UV-A, while total bacteria required four hours and 16.5 kJ/L of UV-A. Inactivation order of E. coli was determined, as follows, suspended TiO2/sunlight (50 mg/L) > TiO2-LDPE pellets/sunlight (52 mg/L) > TiO2/SiO2-BGT/sunlight (59 mg/L), the best E. coli. inactivation rate was obtained with TiO2-LDPE pellets/sunlight, within 4.5 kJ/L and 90 min. The highest total bacteria inactivation rate was found for TiO2/sunlight (50 mg/L) and TiO2-LDPE pellets/sunlight (52 mg/L), within 11.2 kJ/L and 180 min. TiO2 deposited over LDPE pellets was the most effective material, which can be successfully used for water disinfection applications. Bacterial regrowth was assessed 24 h after all photocatalytic treatments, none of those microorganisms showed any recovery above the detection limit (2 CFU/mL). Full article
(This article belongs to the Special Issue Solar Detoxification of Wastewater)
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