Nanomaterials in the environment applications and effects

[CEST2019_00928] Photocatalytic Degradation of Tebuconazole Fungicide using Palygorskite-TiO2 nanocomposites.
by Giannakis I., Panagiotaras D., Papoulis D., Gianni E., Stathatos E., Bekiari V., Kalarakis A.N., Panagopoulos G.

In our study a combination of Palygorskite clay mineral with TiO2 nanoparticles used for the decomposition of the common tebuconazole (TEB), C16H22ClN3O, [(RS)-1-p-chlorophenyl-4,4-dimethyl-3-(1H-1,2,4-triazol-1-ylmethyl)-pentan-3-ol], fungicide in water. For this purpose, Palygorskite-TiO2 nanocomposites fabricated using the sol-gel process combined with hydrothermal treatment of the samples under mild conditions. The Palygorskite-TiO2 nanocomposites were characterized by X-Ray diffraction (XRD), scanning electron microscopy (SEM), and N2 specific surface area (SSA) analysis by BET.

Session: 46, Room: D, at Sat, 09/07/2019 - 13:27 to 13:30
Flash presentation in Nanomaterials in the environment applications and effects
[CEST2019_00885] Electrochemical properties of SnO2/rGO nanocomposites
by Todorova N., Giannakopouloy T., Lekakou C., Arabatzis I.,Trapalis C.

SnO2 nanoparticles were deposited on reduced graphene oxide (rGO) to obtain SnO2/rGO composites with high energy storage capacitance. For this purpose, graphite oxide (GtO) was synthesized and hydrothermally treated in presence of Sn precursor. The quantity of GtO was varied to tune the heterostructures’ composition and the particles size of the SnO2.

Session: 46, Room: D, at Sat, 09/07/2019 - 13:18 to 13:21
Flash presentation in Nanomaterials in the environment applications and effects
[CEST2019_00886] Application of Ni loaded FAU zeolites in catalytic conversion of 1,2-dichloroethane towards value-added products
by Góra-Marek K., Śrębowata A., Kowalewski E., Tarach K.A., Pyra K.

The catalytic performance of nickel loaded zeolite materials was found to be dependent on their acidic feature that influenced metal speciation and its dispersion. The selectivity to ethane and ethane of the Ni loaded catalysts increased when reducing both the number of acid sites and average nickel particle size in zeolite catalysts.

Session: 46, Room: D, at Sat, 09/07/2019 - 13:21 to 13:24
Flash presentation in Nanomaterials in the environment applications and effects
[CEST2019_00899] TiO2/Graphene Oxide Heterostructures for Photocatalytic Applications
by Giannakopoulou T., Papailias I., Todorova N., Trapalis A., Bahnemann D.

In the present work, TiO2/graphene oxide (GO) heterostructures with different concentrations of GO were synthesized by hydrothermal transformation of Na-titanate in basic solution. The morphology of the prepared materials was observed by X-ray diffraction analysis (XRD) and transmission electron microscopy (TEM). The transient absorption spectra of the pure TiO2 and composite TiO2/GO materials were collected using laser flash photolysis technique in order to assess photoinduced charge transfer kinetics.

Session: 46, Room: D, at Sat, 09/07/2019 - 13:24 to 13:27
Flash presentation in Nanomaterials in the environment applications and effects
[CEST2019_00772] Aqueous synthesized mixed-phase nano-TiO2 photocatalysts for water treatment of both organic and inorganic pollutants
by Chalastara K., Demopoulos G.P.

Nano-sized mixed-phase titanium dioxide (TiO2) particles are synthesized through aqueous hydrolytic precipitation of TiCl4, in an easily-scalable continuously stirred tank reactor, CSTR. Different conditions give tunable mixed phase nanotitania particles consisting of anatase (A), rutile (R) or brookite (B) that are further characterized as photocatalysts in both oxidative and reductive roles and compared with the well-known commercial nanotitania, Evonik P25.

Session: 46, Room: D, at Sat, 09/07/2019 - 12:00 to 12:15
Oral presentation in Nanomaterials in the environment applications and effects
[CEST2019_00732] Adsorption of Gatifloxacin from Aqueous Solution with Highly Stable Zr(IV)-Based Porphyrinic Metal-Organic Frameworks
by Chen J.-J., Wang L.-J., Xu G.-J., Wang X., Zhao R.-S.

Water stable Zr-metal–organic framework nanoparticles (PCN-224 NPs) have been solvothermally synthesized. PCN-224 NPs show spherical shape with smooth surface and particle size of approximately 200 nm. PCN-224 NPs can be stable in acid and aqueous solutions, as confirmed by powder X-ray diffraction. Gatifloxacin (GTF) adsorption measurements showed that PCN-224 NPs exhibit a high adsorption capacity of 876 mgg-1. Meanwhile, the adsorption factors, adsorption characteristics, and mechanisms of GTF were investigated in batch adsorption experiments.

Session: 46, Room: D, at Sat, 09/07/2019 - 12:30 to 12:45
Oral presentation in Nanomaterials in the environment applications and effects
[CEST2019_00724] Evaluation of soil loaded with green iron nanoparticles for hexavalent chromium reduction
by Mystrioti C., Mpouras T., Papassiopi N. ,Dermatas D.

Chromate is a pollutant often found in groundwater and considered a serious threat for humans and ecosystem. Iron nanoparticles produced by green tea polyphenols (GT-nZVI) is a powerful reductant, appropriate for the reduction of Cr(VI) to Cr(III). GT-nZVI suspension was initially conceived ideal for direct injection in the contaminated aquifers. However, many studies demonstrated that this suspension presents very low mobility in calcareous aquifers, which are typical in Mediterrannean countries.

Session: 46, Room: D, at Sat, 09/07/2019 - 13:15 to 13:18
Flash presentation in Nanomaterials in the environment applications and effects
[CEST2019_00645] The influence of graphene addition on the properties of composite membranes RG / PAN and their potential application
by Fryczkowska B.

PAN is an inexpensive and popular engineering polymer, which is widely used in membrane techniques: ultrafiltration (UF), nanofiltration (NF), reverse osmosis (RO) and pervaporation (PV). It is characterized by good thermal stability, high thermal conductivity, chemical resistance, solubility in many classic solvents, resistance to UV radiation and good mechanical properties. It can be easily modified both chemically and physically.

Session: 46, Room: D, at Sat, 09/07/2019 - 13:12 to 13:15
Flash presentation in Nanomaterials in the environment applications and effects
[CEST2019_00627] Structuring efficient photocatalysts into bespoke fiber shaped systems for applied water treatment
by Theodorakopoulos G., Romanos G., Katsaros F., Papageorgiou S., Falaras P., Kontos A., Beazi-Katsioti M.

In this study structured photocatalytic systems were successfully developed by a facile method. Polymeric (Alginate) molds, settled the basis in order to effectively disperse and stabilize nanoparticles of an efficient, copper augmented photocatalyst (Degussa P25), which after removal of the polymer by a pyrolytic or calcination-sintering procedure, were shaped in the form of all-ceramic hollow fibers (HFs) with enhanced photocatalytic and mechanical properties and excellent resistance to attrition.

Session: 46, Room: D, at Sat, 09/07/2019 - 13:09 to 13:12
Flash presentation in Nanomaterials in the environment applications and effects
[CEST2019_00563] Cobalt- and copper-modified fly ash nanozeolites for environmental protection systems
by Boycheva S., Marinov I., Lazarova H., Zgureva D., Václavíková M., Popova M.

In the present study, copper- (Cu-FAZ) and cobalt-modified (Co-FAZ) fly ash zeolites (FAZ) were prepared by an incipient wetness impregnation technique, and the loading of 6 wt. % copper or cobalt in the zeolite Na-X framework was achieved. Cu-FAZ and Co-FAZ were investigated by X-ray diffraction to clarify the state of Cu and Co into the FAZ matrix, while surface studies by nitrogen adsorption/desorption technique were carried out to study the effect of modification on the FAZ surface characteristics.

Session: 46, Room: D, at Sat, 09/07/2019 - 13:06 to 13:09
Flash presentation in Nanomaterials in the environment applications and effects
[CEST2019_00565] Removal of Cr(VI) under flow conditions using a green nano-iron loaded resin
by Toli A., Mystrioti C., Xenidis A., Papassiopi N.

A new nanocomposite material, consisting of nanoiron incorporated in cationic resin beads, was evaluated for the removal of Cr(VI) under flow conditions, by conducting column experiments. An aqueous solution containing Cr(VI) 5 mg/L and NaCl 0.01 M as inert electrolyte was introduced in the column applying a continuous up-flow mode. The tests were carried out using a column with diameter 2.6 cm and the flowrate was stepwise increased, reducing the Empty Bed Contact Time (EBCT) from 38 to 2.3 minutes.

Session: 46, Room: D, at Sat, 09/07/2019 - 11:45 to 12:00
Oral presentation in Nanomaterials in the environment applications and effects
[CEST2019_00501] Interactions between Plants and Rare Earth Oxide Nanoparticles
by Zhang Z.Y.

Rare earth oxide nanoparticles (REO NPs) can be released into the environment from various application routes, but their effects on the ecosystem are still little known. In this study, we exposed cucumber seedlings to suspensions of La2O3 and CeO2 NPs for 14 d. Phytotoxicity of the two REO NPs was assessed and their distribution and transformation in plant tissues were investigated. CeO2 NPs had no toxicity to cucumber at all tested concentrations, while La2O3 NPs showed significant inhibition on root elongation, biomass, as well as induced more ROS and cell death in roots.

Session: 46, Room: D, at Sat, 09/07/2019 - 12:15 to 12:30
Oral presentation in Nanomaterials in the environment applications and effects
[CEST2019_00505] Evaluation of risk and the beneficial effects of synthesized nano silver-based disinfectant on poultry mortality and health
by Kumar I., Bhattacharya J.

This study was evaluated for the potential use of nanosilver (nAg) as a disinfectant and antimicrobial growth promoter supplement for the poultry. The experiments were conducted in the Kangsabati river basin region, in West Medinipur district, West Bengal, India for six months. Two poultry farms were adopted for the experiment. The rural economy of this region from Jhargram to Barkola is heavily dependent on contract poultry farming. The water samples were collected from the water source of poultry farm which has been used for poultry drinking purpose.

Session: 46, Room: D, at Sat, 09/07/2019 - 13:03 to 13:06
Flash presentation in Nanomaterials in the environment applications and effects
[CEST2019_00458] Adsorption of heavy metals (hexavalent chromium, lead, manganese and cadmium) on multiwall carbon nanotubes
by Mpouras T., Papadaki S., Dermatas D.,Papassiopi N.

Nanotechnology holds great potential in the sector of water/wastewater treatment since it is considered as an advanced technology for improving water quality. Carbon nanotubes is a carbonaceous material that shows exceptional adsorption capacity for the removal of heavy metals due to their novel properties. Thus their application for the treatment of industrial wastewater or contaminated groundwater exhibits high interest.

Session: 46, Room: D, at Sat, 09/07/2019 - 11:30 to 11:45
Oral presentation in Nanomaterials in the environment applications and effects
[CEST2019_00261] Enhanced of TiO2-Ag photocatalysis performance for removal of methylene blue in the presence of acetone
by Harja M., Duduman Nutescu C., Apostolescu G.A., Gómez De Salazar J.M., Gómez De Castro C., Sescu A.M., Favier L., Ciobanu G.

In the present study, the photocatalytic degradation of methylene blue (MB), using TiO2-Ag synthesized by sol-gel method, as a catalyst under UV light, was studied. Tests were carried out in a batch reactor, magnetically stirred, with external irradiation using an UV-B. The effects of some parameters, such as catalyst dosage and initial acetone concentration were investigated. Results showed that the optimal catalyst concentration was 0.03 g/L, at a concentration of MB of 1.25∙10-5 mol/L.

Session: 46, Room: D, at Sat, 09/07/2019 - 13:00 to 13:03
Flash presentation in Nanomaterials in the environment applications and effects
[CEST2019_00148] One-step Synthesis of TiO2/ZnO Nanocomposites by Refluxing Methods for Photochemical Degradation of Humic Acid
by Fadillah G., Hidayat R., Wahyuningsih S.

Synthesis of TiO2/ZnO nanocomposites (TZN) through the one-step refluxing method for photochemical degradation of humic acid (HA) in aqueous solution has been studied. Titanium isopropoxide (TTIP) and ZnSO4.7H2O were used as a starting material under base solution at 120 oC for 24 hours. TZN materials were characterized by x-ray diffraction (XRD), scanning electron microscope (SEM), the thermogravimetric analysis and differential thermal analysis (TG-DTA).

Session: 46, Room: D, at Sat, 09/07/2019 - 12:45 to 13:00
Oral presentation in Nanomaterials in the environment applications and effects