Special Issue "Nanomaterials for Water Treatment"
A special issue of Nanomaterials (ISSN 2079-4991).
Deadline for manuscript submissions: closed (31 May 2017)
Prof. Dr. Dror Avisar
Hydrochemistry, Head of the Water Research Center, Earth Sciences, Tel Aviv University, Israel
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Interests: (a) Identifying the fate and transport mechanisms of various persistent pollutants and degradation by-products in domestic and hospital wastewater, effluents and biosolids; industrial fish ponds, effluent irrigated fields, river streams and groundwater; (b) Technology development for water treatment and purification via various combinations of Advanced Oxidation Processes (AOPs) for removal of persistent pollutants such as pharmaceutical compounds from wastewater effluent/wastewater
Many engineered nanoparticle (ENP) products that rely on the chemical and physical properties are examined at the production and synthesis stage, and are well characterized, both in terms of size, shape, aggregation behaviour, as well as in terms of their interactions and the possible health effects on workers during all steps of production and of consumers during delivery. Given that ENPs are used in many industries—from medicine, through food and crop production and up to environmental and water technologies—it is of little surprise that many ENPs find their way “post-use” to the environment with possible eco-toxicological and health effects. In the recent years much attention has been given to eco-toxicological effects of ENPs in the aquatic environment. These studies are complicated by the multiple interactions ENP can undergo in the aqueous media—changes in redox chemistry, chemisorption and desorption of toxic organics or toxic metals, biodegradation, bioaccumulation, aggregation and disaggregation, deposition and resuspension, as well as dissolution and re-precipitation of phases in aquatic environments. NPs released to the aquatic environment and left untreated in water treatment plants may contaminate drinking water sources used for human consumption. An important issue is the fate of ENP in wastewater treatment plants (WWTP). The behaviour on ENPs in wastewater and effluent is complicated (especially compared to freshwater) by the high content of organic matter and surfactants in wastewater, materials that could affect the ENPs in many, unpredictable, ways. Therefore, the fate of ENPs after they enter the water cycle and the effect of wastewater treatment on these ENPs should be evaluated.
Prof. Dr. Dror Avisar
Manuscript Submission Information
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- engineered nanoparticles
- drinking water
- natural organic matter
The below list represents only planned manuscripts. Some of these manuscripts have not been received by the Editorial Office yet. Papers submitted to MDPI journals are subject to peer-review.
Authors: Enbal Luster 1,2, Dror Avisar 2, Inna Horovitz 1,2, Luca Lozzi 3, Hadas Mamane 1,2
Affiliations: 1 Environmental engeeniring, Tel Aviv University, Israel
2 Water Research Center, Earth Sciences, Faculty of Exact Sciences, tel Aviv Universty, Israel
3 Department of Physical and Chemical Sciences, University of L'Aquila, Italy
Abstract: The use of solar energy to activate nano-structured photocatalyst via advanced oxidation process (AOP) is a promising and emerging water treatment process. The photocatalytic activity (PCA) of N-doped TiO2 (TiON) coated Al2O3 photocatalytic membrane to photodegrade Carbamazepine (CBZ), a model compound for common pollutant was investigated in different water qualities. The photocatalytic membrane combines membrane filtration and advanced oxidation processes as photocatalysis in a single step. However, the presence of anions, cations and natural organic matter (NOM) can affect photocatalytic efficiency through competitive adsorption, hydroxyl radical scavenging or by inner filter effect. Degradation CBZ was determined by addition of individual constituents as pH, alkalinity, NOM, divalent cations (Mg+2 and Ca+2) and chloride. TiON catalyst showed a high potential to degrade carbamazepine from deionized water, under simulated solar irradiation. Water quality results showed a significant reduction in PCA in natural surface water. The added constituents in water matrix simulating natural water have an impact the degradation of CBZ. Addition of NOM, carbonate ions, Mg+2 and Ca+2 results in reduction in CBZ degradation rate (15%, 30%, 25% and 20%, respectively). No detrimental effect was found from chloride addition while increasing pH showed inconclusive results as reaction rate increased when the level of pH approached neutral. Chemical cleaning by 0.1% HCl showed a high potential for membrane photocatalytic activity regeneration after continuous use.