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A. Volpe
Water Research Institute-Italian National Research Council (IRSA-CNR), 70132 Bari, BA, Italy

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Journal article
Published: 21 January 2020 in International Journal of Environmental Research and Public Health
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A laboratory-scale study was carried out to evaluate the groundwater bioremediation potential of hexavalent chromium (Cr(VI)), taking into account the chromate pollution of an industrial site located in Southern Italy (Apulia Region). The reduction of Cr(VI) was studied on laboratory microcosms, set up in different experimental conditions, namely: ABIO (soil and water sterilized), BIO (soil and water not sterilized), LATT (with the addition of lactate), and YE (with the addition of yeast extract). Control test lines, set up by using sterilized matrices and amendments, were employed to assess the occurrence of the pollutant reduction via chemical processes. By combining molecular (microbial abundance, specific chromate reductase genes (ChR) and the Shewanella oinedensis bacterial strain) with chemical analyses of chromium (VI and III) in the matrices (water and soil) of each microcosm, it was possible to investigate the response of microbial populations to different experimental conditions, and therefore, to assess their bioremediation capability in promoting Cr(VI) reduction. The overall results achieved within this work evidenced the key role of amendments (lactate and yeast extract) in enhancing the biological reduction of hexavalent chromium in the contaminated aqueous phase of laboratory microcosms. The highest value of Cr(VI) removal (99.47%) was obtained in the YE amended microcosms at seven days.

ACS Style

Valeria Ancona; Claudia Campanale; Marina Tumolo; Domenico De Paola; Claudio Ardito; Angela Volpe; And Vito Felice Uricchio. Enhancement of Chromium (VI) Reduction in Microcosms Amended with Lactate or Yeast Extract: A Laboratory-Scale Study. International Journal of Environmental Research and Public Health 2020, 17, 704 .

AMA Style

Valeria Ancona, Claudia Campanale, Marina Tumolo, Domenico De Paola, Claudio Ardito, Angela Volpe, And Vito Felice Uricchio. Enhancement of Chromium (VI) Reduction in Microcosms Amended with Lactate or Yeast Extract: A Laboratory-Scale Study. International Journal of Environmental Research and Public Health. 2020; 17 (3):704.

Chicago/Turabian Style

Valeria Ancona; Claudia Campanale; Marina Tumolo; Domenico De Paola; Claudio Ardito; Angela Volpe; And Vito Felice Uricchio. 2020. "Enhancement of Chromium (VI) Reduction in Microcosms Amended with Lactate or Yeast Extract: A Laboratory-Scale Study." International Journal of Environmental Research and Public Health 17, no. 3: 704.

Original articles
Published: 27 December 2017 in Journal of Environmental Science and Health, Part A
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The photochemical degradation of two azo and two anthraquinonic dyes was performed using potassium peroxymonosulphate (Oxone®) activated by UV radiation. The fast decolourization of all dyes was observed within 6 min of UV irradiation, with corresponding dye decays higher than 80%. The kinetic rate constants of the dyes' decay were determined, along with the energetic efficiency of the photochemical treatment, taking into account the influence of a few anions commonly present in real wastewaters (i.e., chloride, nitrate, carbonate/bicarbonate and phosphate ions). Chloride and carbonate/bicarbonate ions enhanced dye degradation, whereas phosphate ions exerted an inhibitory effect, and nitrates did not have a predictable influence. The dye decolourization was not associated with efficient mineralization, as suggested by the lack of a significant total organic carbon (TOC) decrease, as well as by the low concentrations of a few detected low molecular weight by-products, including nitrate ions, formaldehyde and organic acids. High molecular weight by-products were also detected by mass spectrometry analysis. The investigated process may be proposed as a convenient pre-treatment to help dye degradation in wastewater during combined treatment methods.

ACS Style

Michele Pagano; Ruggiero Ciannarella; Vito Locaputo; Giuseppe Mascolo; Angela Volpe. Oxidation of azo and anthraquinonic dyes by peroxymonosulphate activated by UV light. Journal of Environmental Science and Health, Part A 2017, 53, 393 -404.

AMA Style

Michele Pagano, Ruggiero Ciannarella, Vito Locaputo, Giuseppe Mascolo, Angela Volpe. Oxidation of azo and anthraquinonic dyes by peroxymonosulphate activated by UV light. Journal of Environmental Science and Health, Part A. 2017; 53 (4):393-404.

Chicago/Turabian Style

Michele Pagano; Ruggiero Ciannarella; Vito Locaputo; Giuseppe Mascolo; Angela Volpe. 2017. "Oxidation of azo and anthraquinonic dyes by peroxymonosulphate activated by UV light." Journal of Environmental Science and Health, Part A 53, no. 4: 393-404.

Journal article
Published: 20 October 2016 in Journal of Hazardous Materials
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Amorphous titanium hydroxide and boron-doped (B-doped) sodium titanates hydrates were synthetized and used as adsorbents for the removal of Pb2+ from water. The use of sodium borohydride (NaBH4) and titanium(IV) isopropoxide (TTIP) as precursors permits a very easy synthesis of B-doped adsorbents at 298 K. The new adsorbent materials were first chemically characterized (XRD, XPS, SEM, DRIFT and elemental analysis) and then tested in Pb2+ adsorption batch experiments, in order to define kinetics and equilibrium studies. The nature of interaction between such sorbent materials and Pb2+ was also well defined: besides a pure adsorption due to hydroxyl interaction functionalities, there is also an ionic exchange between Pb2+ and sodium ions even working at pH 4.4. Langmuir model presented the best fitting with a maximum adsorption capacity up to 385 mg/g. The effect of solution pH and common ions (i.e. Na+, Ca2+ and Mg2+) onto Pb2+ sorption were also investigated. Finally, recovery was positively conducted using EDTA. Very efficient adsorption (>99.9%) was verified even using tap water spiked with traces of Pb2+ (50 ppb).

ACS Style

Luigi di Bitonto; Angela Volpe; Michele Pagano; Giuseppe Bagnuolo; Giuseppe Mascolo; Valeria La Parola; Paola Di Leo; Carlo Pastore. Amorphous boron-doped sodium titanates hydrates: Efficient and reusable adsorbents for the removal of Pb2+ from water. Journal of Hazardous Materials 2016, 324, 168 -177.

AMA Style

Luigi di Bitonto, Angela Volpe, Michele Pagano, Giuseppe Bagnuolo, Giuseppe Mascolo, Valeria La Parola, Paola Di Leo, Carlo Pastore. Amorphous boron-doped sodium titanates hydrates: Efficient and reusable adsorbents for the removal of Pb2+ from water. Journal of Hazardous Materials. 2016; 324 ():168-177.

Chicago/Turabian Style

Luigi di Bitonto; Angela Volpe; Michele Pagano; Giuseppe Bagnuolo; Giuseppe Mascolo; Valeria La Parola; Paola Di Leo; Carlo Pastore. 2016. "Amorphous boron-doped sodium titanates hydrates: Efficient and reusable adsorbents for the removal of Pb2+ from water." Journal of Hazardous Materials 324, no. : 168-177.

Journal article
Published: 15 October 2016 in Science of The Total Environment
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The degradation of two of the most frequently used UV-filters was investigated through microcosm studies. Marine sediments sampled from two sites in Italy (La Spezia harbour and Sarno river estuary, S1 and S2 respectively) were used to set up aerobic and anaerobic sets of reactors. The sediments were spiked with a methanol solution of 3-(4-methylbenzylidene)camphor (4-MBC) and 2-ethylhexyl 4-(dimethylamino)benzoate (EH-DPAB), at concentrations of either 25 or 50 mg kg− 1 each. Methanol (6.3 g/L) also served as an organic amendment and growth substrate for improving microbial activity. Monitoring of the biotic and abiotic degradation of the selected contaminants over 16 months revealed that 4-MBC biodegradation was very slow and incomplete, whereas over 90% of EH-DPAB was degraded both in the aerobic and the anaerobic reactors by the natural microbial communities of both sediments. Repeated spikes of EH-DPAB were followed by complete decay, characterised by first-order kinetics. The calculated kinetic rate constants under aerobic and anaerobic conditions were similar. In reactors inoculated with the S1 sediment the degradation rate constants progressively increased after each spike, up to the value of 0.039 d− 1. For the S2 sediment the rate constant was around 0.020 d− 1 throughout the duration of the experiment. Mass spectrometry analysis of sediment extracts allowed detection of potential transformation products of EH-DPAB and 4-MBC. Moreover, the natural microbial community of the sediments was studied using the CAtalyzed Reporter Deposition Fluorescence In Situ Hybridization (CARD-FISH) both in the initial sediments and after degradation under aerobic and anaerobic conditions.

ACS Style

Angela Volpe; Michele Pagano; Giuseppe Mascolo; Paola Grenni; Simona Rossetti. Biodegradation of UV-filters in marine sediments. Science of The Total Environment 2016, 575, 448 -457.

AMA Style

Angela Volpe, Michele Pagano, Giuseppe Mascolo, Paola Grenni, Simona Rossetti. Biodegradation of UV-filters in marine sediments. Science of The Total Environment. 2016; 575 ():448-457.

Chicago/Turabian Style

Angela Volpe; Michele Pagano; Giuseppe Mascolo; Paola Grenni; Simona Rossetti. 2016. "Biodegradation of UV-filters in marine sediments." Science of The Total Environment 575, no. : 448-457.

Journal article
Published: 15 July 2016 in Journal of Environmental Science and Health, Part A
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Titanates may be selectively used as inorganic adsorbents for heavy metal ions owing to their stability and fast adsorption kinetics. Nevertheless, the synthesis of such materials usually requires extreme reaction conditions. In this work, a new titanium-based material was rapidly synthesized under mild laboratory conditions. The obtained amorphous hydroxo titanate was tested for heavy metal sorption through kinetic and equilibrium batch tests, which indicated that the new material had high adsorption rates and adsorption capacities towards Cu(2+), Ni(2+) and Pb(2) ions. Adsorption kinetics were pseudo-second order, and equilibrium data fitted the Langmuir isotherm model. The calculated maximum adsorption capacities of Cu(2+), Ni(2+) and Pb(2+) in deionized water were around 1 mmol g(-1), and they decreased for Cu(2+) and Ni(2+) in the presence of Na(+), Ca(2+) and Mg(2+) ions, whereas the alkali metal ions did not influence Pb(2+) uptake. The efficiency of adsorption and recovery of lead ions were evaluated through column dynamic tests, by feeding the column with groundwater and tap water spiked with Pb(2+). The high performance of the hydroxo titanate over several cycles of retention and elution suggested that the product is potentially useful for the solid phase extraction of lead at trace levels in natural water samples, with potential use in metal pre-concentration for analytical applications.

ACS Style

Angela Volpe; Michele Pagano; Carlo Pastore; Corrado Cuocci; Antonella Milella. Sorption properties of an amorphous hydroxo titanate towards Pb 2+ , Ni 2+ , and Cu 2+ ions in aqueous solution. Journal of Environmental Science and Health, Part A 2016, 51, 1 -10.

AMA Style

Angela Volpe, Michele Pagano, Carlo Pastore, Corrado Cuocci, Antonella Milella. Sorption properties of an amorphous hydroxo titanate towards Pb 2+ , Ni 2+ , and Cu 2+ ions in aqueous solution. Journal of Environmental Science and Health, Part A. 2016; 51 (13):1-10.

Chicago/Turabian Style

Angela Volpe; Michele Pagano; Carlo Pastore; Corrado Cuocci; Antonella Milella. 2016. "Sorption properties of an amorphous hydroxo titanate towards Pb 2+ , Ni 2+ , and Cu 2+ ions in aqueous solution." Journal of Environmental Science and Health, Part A 51, no. 13: 1-10.

Journal article
Published: 01 December 2013 in Journal of Environmental Management
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Two sets of soil lysimeters were amended with solid and liquid olive mill wastes and the composition of leachate was analysed. Five treatments were carried out using: olive mill wastewater (OMW) at two different rates (80 and 320 m(3)/ha); OMW pre-treated by catalytical digestion with MnO2; compost obtained by exhausted olive pomace; freshwater as the control. Electric conductivity, pH, potassium, total polyphenols and nitrates were monitored in the leachate as indexes of potential groundwater contamination. The study demonstrated that the impact of all the selected amendments on groundwater was the minimum. OMW was safely applied to soil even at four times the rate allowed by the Italian law, and pre-treatment by catalytical digestion was not necessary to further reduce the impact on groundwater. The application of olive pomace compost was equally safe.

ACS Style

Maria Clementina Caputo; Anna Maria De Girolamo; Angela Volpe. Soil amendment with olive mill wastes: Impact on groundwater. Journal of Environmental Management 2013, 131, 216 -221.

AMA Style

Maria Clementina Caputo, Anna Maria De Girolamo, Angela Volpe. Soil amendment with olive mill wastes: Impact on groundwater. Journal of Environmental Management. 2013; 131 ():216-221.

Chicago/Turabian Style

Maria Clementina Caputo; Anna Maria De Girolamo; Angela Volpe. 2013. "Soil amendment with olive mill wastes: Impact on groundwater." Journal of Environmental Management 131, no. : 216-221.

Journal article
Published: 15 March 2013 in Chemosphere
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Some industrial wastewaters contain both hexavalent chromium and surfactants. In this work, their removal from aqueous solution by zero-valent iron (ZVI) and peroxymonosulphate (PMS) was studied using Brij 35 as a representative non-ionic surfactant. The performance of the ZVI/PMS system in the simultaneous removal of both pollutants was compared to that achieved with control solutions containing either Cr(VI) or Brij 35 separately. Reactions were carried out over 24 h at initial pH = 2.3 with variable initial amounts of Cr(VI) and Brij 35. The results showed that surfactant removal was enhanced in the system also containing Cr(VI). Surfactant degradation followed zero-order kinetics and produced formic acid as the main by-product, together with hydroxylated aldehydes, formates and alcohols that were identified by LC/MS. The presence of surfactant similarly enhanced Cr(VI) reduction, which also followed zero-order kinetics. Chromium removal was quantitative only when the initial chromium concentration was lower than 140 mg L−1. Reduced chromium was mainly in the solution phase together with dissolved iron. Precipitation with NaOH was therefore required to definitively remove dissolved metals from the investigated system.

ACS Style

Angela Volpe; Michele Pagano; Giuseppe Mascolo; Antonio Lopez; Ruggiero Ciannarella; Vito Locaputo. Simultaneous Cr(VI) reduction and non-ionic surfactant oxidation by peroxymonosulphate and iron powder. Chemosphere 2013, 91, 1250 -1256.

AMA Style

Angela Volpe, Michele Pagano, Giuseppe Mascolo, Antonio Lopez, Ruggiero Ciannarella, Vito Locaputo. Simultaneous Cr(VI) reduction and non-ionic surfactant oxidation by peroxymonosulphate and iron powder. Chemosphere. 2013; 91 (9):1250-1256.

Chicago/Turabian Style

Angela Volpe; Michele Pagano; Giuseppe Mascolo; Antonio Lopez; Ruggiero Ciannarella; Vito Locaputo. 2013. "Simultaneous Cr(VI) reduction and non-ionic surfactant oxidation by peroxymonosulphate and iron powder." Chemosphere 91, no. 9: 1250-1256.

Journal article
Published: 01 March 2012 in Environmental Engineering Science
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Fenton oxidation of the nonionic surfactant Brij 35 was enhanced by the effect of 1,4-hydroquinone adsorbed on granular activated carbon (GAC). The procedure allowed 90%–94% surfactant removal after 24 h at pH=2.7–3.0, using 97 mg g−1 of hydroquinone adsorbed on GAC and concentrations of surfactant, H2O2, and iron (either Fe2+ or Fe3+) of, respectively, 1300, 450, and 9 mg L−1. In the absence of carbon and hydroquinone, and with the same concentration of H2O2, conventional Fenton process required 300 mg L−1 of Fe(II) to obtain 85% removal of Brij 35. Quinone-loaded carbon was effectively recycled until surfactant removal decreased to 50%–60%. Only 3% of hydroquinone was desorbed from GAC to the aqueous solution, and about 40% of the dissolved fraction was degraded to low-molecular-weight organic acids. This is the first description of a Fenton process performing the recycling of a redox-active organic compound adsorbed on GAC, with the aim of decreasing the amount of iron salt utilized in the conventional Fenton reaction.

ACS Style

Michele Pagano; Angela Volpe; Giuseppe Mascolo; Antonio Lopez; Vito Locaputo; Ruggiero Ciannarella. Cooperative Effects of Adsorption on Granular Activated Carbon and Hydroquinone-Driven Fenton Reaction in the Removal of Nonionic Surfactant from Aqueous Solution. Environmental Engineering Science 2012, 29, 202 -211.

AMA Style

Michele Pagano, Angela Volpe, Giuseppe Mascolo, Antonio Lopez, Vito Locaputo, Ruggiero Ciannarella. Cooperative Effects of Adsorption on Granular Activated Carbon and Hydroquinone-Driven Fenton Reaction in the Removal of Nonionic Surfactant from Aqueous Solution. Environmental Engineering Science. 2012; 29 (3):202-211.

Chicago/Turabian Style

Michele Pagano; Angela Volpe; Giuseppe Mascolo; Antonio Lopez; Vito Locaputo; Ruggiero Ciannarella. 2012. "Cooperative Effects of Adsorption on Granular Activated Carbon and Hydroquinone-Driven Fenton Reaction in the Removal of Nonionic Surfactant from Aqueous Solution." Environmental Engineering Science 29, no. 3: 202-211.

Journal article
Published: 27 October 2011 in Chemosphere
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The non-ionic surfactant Brij 35 was effectively removed from concentrated aqueous solution by the peroxymonosulfate/Co(II) system, using oxone (2KHSO5·KHSO4·K2SO4) as a source of peroxymonosulfate. At pH = 2.3 and initial Brij 35 concentration in the range 680–2410 mg L−1, 86–94% removal was achieved after 24 h, using Co(II) = 15 μM and oxone = 5.9 mM. The effectiveness of removal did not change when initial pH was in the range 2.3–8.2. After five subsequent additions of Co(II) and oxone to the solution, COD and TOC removals increased up to 64% and 33%, respectively. Radical quenching tests confirmed that sulfate radical was the dominant radical species in the system. The main identified by-products from surfactant degradation were: (a) low molecular weight organic acids; (b) aldehydes and formates with shorter ethoxy chain than Brij 35; (c) alcohol ethoxylates carrying hydroxyl groups bonded to ethoxy chain. By-products identification allowed to hypothesize the pathways of Brij 35 degradation.

ACS Style

Michele Pagano; Angela Volpe; Giuseppe Mascolo; Antonio Lopez; Vito Locaputo; Ruggiero Ciannarella. Peroxymonosulfate–Co(II) oxidation system for the removal of the non-ionic surfactant Brij 35 from aqueous solution. Chemosphere 2011, 86, 329 -334.

AMA Style

Michele Pagano, Angela Volpe, Giuseppe Mascolo, Antonio Lopez, Vito Locaputo, Ruggiero Ciannarella. Peroxymonosulfate–Co(II) oxidation system for the removal of the non-ionic surfactant Brij 35 from aqueous solution. Chemosphere. 2011; 86 (4):329-334.

Chicago/Turabian Style

Michele Pagano; Angela Volpe; Giuseppe Mascolo; Antonio Lopez; Vito Locaputo; Ruggiero Ciannarella. 2011. "Peroxymonosulfate–Co(II) oxidation system for the removal of the non-ionic surfactant Brij 35 from aqueous solution." Chemosphere 86, no. 4: 329-334.

Journal article
Published: 11 October 2011 in Water, Air, & Soil Pollution
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An environmentally friendly procedure suitable to restore a protected area was evaluated at laboratory scale. Soil contaminated by high molecular weight (C > 10) aliphatic hydrocarbons and by chromium was withdrawn from the study site and a qualitative study of soil hydrocarbon components was first performed in order to assess the potential source of contamination. To this aim, a number of characteristic diagnostic ratios of hydrocarbon components were derived by processing chromatographic data, and were used as indicators for distinguishing anthropogenic from natural hydrocarbons. Then, the efficiency of landfarming for soil remediation was tested by comparing the effect of a few selected amendments and by monitoring the fate of chromium. Soil microbial abundance and activity were also evaluated. Results showed that soil hydrocarbons were mainly of anthropogenic origin and land treatment allowed effective degradation by native microbial populations even in the absence of amendments. The investigated procedures had no effect on the mobilisation of chromium that remained in its stable form of Cr(III). Conventional land treatment may therefore be an effective and safe procedure for the removal of hydrocarbons even in the presence of chromium, and may be applied to areas where low-impact procedures are strictly required.

ACS Style

Angela Volpe; Stefania D’Arpa; Guido Del Moro; Simona Rossetti; Valter Tandoi; Vito Felice Uricchio. Fingerprinting Hydrocarbons in a Contaminated Soil from an Italian Natural Reserve and Assessment of the Performance of a Low-Impact Bioremediation Approach. Water, Air, & Soil Pollution 2011, 223, 1773 -1782.

AMA Style

Angela Volpe, Stefania D’Arpa, Guido Del Moro, Simona Rossetti, Valter Tandoi, Vito Felice Uricchio. Fingerprinting Hydrocarbons in a Contaminated Soil from an Italian Natural Reserve and Assessment of the Performance of a Low-Impact Bioremediation Approach. Water, Air, & Soil Pollution. 2011; 223 (4):1773-1782.

Chicago/Turabian Style

Angela Volpe; Stefania D’Arpa; Guido Del Moro; Simona Rossetti; Valter Tandoi; Vito Felice Uricchio. 2011. "Fingerprinting Hydrocarbons in a Contaminated Soil from an Italian Natural Reserve and Assessment of the Performance of a Low-Impact Bioremediation Approach." Water, Air, & Soil Pollution 223, no. 4: 1773-1782.

Original articles
Published: 01 January 2011 in Environmental Technology
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Batch and column tests were conducted to compare the efficiencies of three Fenton‐like systems in the degradation of chlorobenzene. In the investigated systems, iron powder was the source of Fe2+ ions, and either Fe3+ or Cu2+ were added in order to enhance the degradation process. Optimum pH and concentrations of Fe3+, Cu2+ and hydrogen peroxide were assessed by treating synthetic chlorobenzene solutions both in batch and in column mode, thus achieving the minimum residual concentration of chlorobenzene. Optimum conditions assessed by means of column tests were then applied to column treatment of real chlorobenzene‐contaminated groundwater. Results showed that, when the TOC content of water was above 12 mg L−1, the performance of the Fe0/H2O2 system was enhanced by the addition of Fe3+, leading to 10–20 µg L−1 of residual chlorobenzene.

ACS Style

Michele Pagano; Angela Volpe; Antonio Lopez; Giuseppe Mascolo; Ruggiero Ciannarella. Degradation of chlorobenzene by Fenton‐like processes using zero‐valent iron in the presence of Fe3+ and Cu2+. Environmental Technology 2011, 32, 155 -165.

AMA Style

Michele Pagano, Angela Volpe, Antonio Lopez, Giuseppe Mascolo, Ruggiero Ciannarella. Degradation of chlorobenzene by Fenton‐like processes using zero‐valent iron in the presence of Fe3+ and Cu2+. Environmental Technology. 2011; 32 (2):155-165.

Chicago/Turabian Style

Michele Pagano; Angela Volpe; Antonio Lopez; Giuseppe Mascolo; Ruggiero Ciannarella. 2011. "Degradation of chlorobenzene by Fenton‐like processes using zero‐valent iron in the presence of Fe3+ and Cu2+." Environmental Technology 32, no. 2: 155-165.

Journal article
Published: 20 September 2010 in Journal of Contaminant Hydrology
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A combination of a parallel fracture model with the PHREEQC-2 geochemical model was developed to simulate sequential flow and chemical transport with reactions in fractured media where both laminar and turbulent flows occur. The integration of non-laminar flow resistances in one model produced relevant effects on water flow velocities, thus improving model prediction capabilities on contaminant transport. The proposed conceptual model consists of 3D rock-blocks, separated by horizontal bedding plane fractures with variable apertures. Particle tracking solved the transport equations for conservative compounds and provided input for PHREEQC-2. For each cluster of contaminant pathways, PHREEQC-2 determined the concentration for mass-transfer, sorption/desorption, ion exchange, mineral dissolution/precipitation and biodegradation, under kinetically controlled reactive processes of equilibrated chemical species. Field tests have been performed for the code verification. As an example, the combined model has been applied to a contaminated fractured aquifer of southern Italy in order to simulate the phenol transport. The code correctly fitted the field available data and also predicted a possible rapid depletion of phenols as a result of an increased biodegradation rate induced by a simulated artificial injection of nitrates, upgradient to the sources.

ACS Style

Costantino Masciopinto; Angela Volpe; Domenico Palmiotta; Claudia Cherubini. A combined PHREEQC-2/parallel fracture model for the simulation of laminar/non-laminar flow and contaminant transport with reactions. Journal of Contaminant Hydrology 2010, 117, 94 -108.

AMA Style

Costantino Masciopinto, Angela Volpe, Domenico Palmiotta, Claudia Cherubini. A combined PHREEQC-2/parallel fracture model for the simulation of laminar/non-laminar flow and contaminant transport with reactions. Journal of Contaminant Hydrology. 2010; 117 (1-4):94-108.

Chicago/Turabian Style

Costantino Masciopinto; Angela Volpe; Domenico Palmiotta; Claudia Cherubini. 2010. "A combined PHREEQC-2/parallel fracture model for the simulation of laminar/non-laminar flow and contaminant transport with reactions." Journal of Contaminant Hydrology 117, no. 1-4: 94-108.

Journal article
Published: 23 June 2010 in ChemInform
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ACS Style

V. Calo; Angelo Nacci; Angela Volpe. ChemInform Abstract: Synthesis of 2-Oxo-oxazolidines and -thiazolidines from the Corresponding 2-Thioxo Compounds. ChemInform 2010, 29, 1 .

AMA Style

V. Calo, Angelo Nacci, Angela Volpe. ChemInform Abstract: Synthesis of 2-Oxo-oxazolidines and -thiazolidines from the Corresponding 2-Thioxo Compounds. ChemInform. 2010; 29 (13):1.

Chicago/Turabian Style

V. Calo; Angelo Nacci; Angela Volpe. 2010. "ChemInform Abstract: Synthesis of 2-Oxo-oxazolidines and -thiazolidines from the Corresponding 2-Thioxo Compounds." ChemInform 29, no. 13: 1.

Journal article
Published: 01 April 2009 in Chemosphere
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A microcosm study was carried out to evaluate the potential for biodegradation of methyl tert-butyl ether (MTBE) impacting groundwater at a former oil refinery site located in Naples (SW Italy). A screening of aerobic, anaerobic and co-metabolic aerobic conditions was carried out by triplicate batch reactors, using contaminated soil and groundwater from the study site. All microcosms were amended with ammonium and phosphate salts and, if aerobic, they were supplied with excess oxygen throughout the static incubation period of 6 months. Propane, pentane and n-hexane were selected as the primary substrates for co-metabolic treatments. After the initial lag phase (40-60d), quantitative MTBE decay was repeatedly observed in the aerobic set amended only with nitrogen and phosphorus and further fed with MTBE, thus suggesting that the indigenous soil bacteria have the ability to degrade MTBE. All other treatments, i.e., anaerobic and co-metabolic aerobic, resulted unsuccessful after incubation extending up to 190d. Bacterial consortia in the active microcosms were later enriched and further studied through second and third generation batch reactors with no soil, operated under continuous mixing for 5-7 months. MTBE degradation rate progressively increased with reactor operating time, following a zero order kinetics in the concentration range 1-10mgL(-1) and leading to a residual concentration of less than 10microgL(-1). The calculated maximum biodegradation rate was 20mg(MTBE)g(VSS)(-1)h(-1). An accumulation of nitrite ions also occurred after long operating times, thus inhibiting MTBE degradation. This effect was minimized by replacing ammonium with nitrate. Identified degradation intermediates were tert-butyl alcohol and tert-butyl formate. Fluorescent in situ hybridization was applied for a preliminary microbiological screening of the consortia, suggesting that the detected cocci (about 0.5 and 1.5microm diameter, respectively) and long bacilli with a narrow diameter might be as yet undescribed species.

ACS Style

Angela Volpe; Guido Del Moro; Simona Rossetti; Valter Tandoi; Antonio Lopez. Enhanced bioremediation of methyl tert-butyl ether (MTBE) by microbial consortia obtained from contaminated aquifer material. Chemosphere 2009, 75, 149 -155.

AMA Style

Angela Volpe, Guido Del Moro, Simona Rossetti, Valter Tandoi, Antonio Lopez. Enhanced bioremediation of methyl tert-butyl ether (MTBE) by microbial consortia obtained from contaminated aquifer material. Chemosphere. 2009; 75 (2):149-155.

Chicago/Turabian Style

Angela Volpe; Guido Del Moro; Simona Rossetti; Valter Tandoi; Antonio Lopez. 2009. "Enhanced bioremediation of methyl tert-butyl ether (MTBE) by microbial consortia obtained from contaminated aquifer material." Chemosphere 75, no. 2: 149-155.

Original articles
Published: 01 April 2008 in Environmental Technology
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The oxidation of 10 nonionic surfactants (6 alcohol ethoxylates and 4 alkylphenol ethoxylates) by Fenton and H2O2/UV processes was investigated in synthetic (deionized water) and real aqueous matrices, i.e. secondary effluent from municipal wastewater treatment plant and groundwater. Batch tests were carried out to assess the optimal dosages of reagents leading to the total removal of surfactants. Regardless to the specific surfactant, both Fenton and H2O2/UV treatments of synthetic solutions containing one single surfactant (C0=14 mg l−1) always caused its rapid and quantitative removal (96–99%) with a corresponding very low (0–18%) TOC decrease. Only for the Fenton treatment, linear relationships were found between the amounts of H2O2 and Fe2+ necessary for surfactant removal and the ethoxy chain length of each surfactant. Conversely, in the case of H2O2/UV treatment the H2O2 dosage causing the quantitative oxidation of the treated surfactant depended on the length of both chains: the ethoxy and the hydrophobic one. Mixtures of the 10 surfactants (1.4 mg l−1 each) were treated in both synthetic and real matrices. These latter were different in the case of Fenton (i.e. municipal secondary effluent) or H2O2/UV (i.e. real groundwater) treatments. Fenton treatment of municipal secondary effluent containing the surfactants mixture led to its total removal when a molar ratio [Total surfactants]/[H2O2]/[Fe2+] equal to 1/17/12 was used. As for H2O2/UV treatment of real groundwater samples, quantitative removal of surfactants mixture was achieved with a molar ratio [Total surfactants]/ [H2O2] equal to 1/7.4. Surfactants mixture removals, if compared in deionized water and in real matrices, showed the same matrix effect during both treatments, i.e. less amounts of reagents were always required in synthetic solutions.

ACS Style

M. Pagano; A. Lopez; A. Volpe; G. Mascolo; R. Ciannarella. OXIDATION OF NONIONIC SURFACTANTS BY FENTON AND H2O2/UV PROCESSES. Environmental Technology 2008, 29, 423 -433.

AMA Style

M. Pagano, A. Lopez, A. Volpe, G. Mascolo, R. Ciannarella. OXIDATION OF NONIONIC SURFACTANTS BY FENTON AND H2O2/UV PROCESSES. Environmental Technology. 2008; 29 (4):423-433.

Chicago/Turabian Style

M. Pagano; A. Lopez; A. Volpe; G. Mascolo; R. Ciannarella. 2008. "OXIDATION OF NONIONIC SURFACTANTS BY FENTON AND H2O2/UV PROCESSES." Environmental Technology 29, no. 4: 423-433.

Journal article
Published: 30 November 2007 in Process Biochemistry
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Batch reactors and microcosms were used to evaluate groundwater bioremediation potential of tetrachloroethene (PCE) in the presence of additional pollutants present at a site located in the Apulia Region (SE Italy). Reductive dechlorination of PCE was studied under anaerobic conditions by comparing the effectiveness of three inocula: (a) soil sampled at the contaminated site, (b) anaerobic sludge from a municipal wastewater plant, and (c) an enriched dehalogenating culture containing Dehalococcoides species. In order to enhance dehalogenation, reactors inoculated with sludge were also amended with selected electron donors. Aerobic reactors were also established to study oxidative degradation of vinyl chloride (VC), that may accumulate after incomplete dechlorination of PCE. Results showed that consortia derived from anaerobic sludge and amended with electron donors quantitatively and incompletely degraded PCE to cis-dichloroethylene, whereas in reactors augmented with a dehalogenating culture complete dechlorination of PCE occurred even in the presence of additional toxic contaminants. The presence of Dehalococcoides spp. in the dehalogenating culture and its absence in reactors inoculated with anaerobic sludge was confirmed using FISH community analyses. In all cases, prolonged incubation periods were necessary for dechlorination. On the other hand, oxidative degradation of VC in aerobic reactors occurred after short lag times.

ACS Style

Angela Volpe; Guido Del Moro; Simona Rossetti; Valter Tandoi; Antonio Lopez. Remediation of PCE-contaminated groundwater from an industrial site in southern Italy: A laboratory-scale study. Process Biochemistry 2007, 42, 1498 -1505.

AMA Style

Angela Volpe, Guido Del Moro, Simona Rossetti, Valter Tandoi, Antonio Lopez. Remediation of PCE-contaminated groundwater from an industrial site in southern Italy: A laboratory-scale study. Process Biochemistry. 2007; 42 (11):1498-1505.

Chicago/Turabian Style

Angela Volpe; Guido Del Moro; Simona Rossetti; Valter Tandoi; Antonio Lopez. 2007. "Remediation of PCE-contaminated groundwater from an industrial site in southern Italy: A laboratory-scale study." Process Biochemistry 42, no. 11: 1498-1505.

Comparative study
Published: 01 November 2004 in Chemosphere
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The reductive degradation of a chlorinated herbicide by iron powder was investigated at lab scale. The studied substrate was triallate (S-2,3,3-trichloroallyl di-isopropyl thiocarbamate) which contains a trichloroethylene moiety potentially reducible by zero-valent iron. Degradation reactions were carried out in batch, at 25 degrees C, in the absence of oxygen, by contacting electrolytic iron powder (size range: 20-50 microm) with a triallate aqueous solution (2.5 mgl(-1)). Herbicide decay, corresponding evolutions of TOC, TOX and chloride ion release were regularly monitored throughout the reactions. Furthermore, the main degradation by-products were identified by HPLC/MS. The results showed that, after 5 days, herbicide degradation extent was about 97% and that the reaction proceeded through the formation of a dechlorinated alkyne by-product (S-2-propinyl di-isopropyl thiocarbamate) resulting from the complete dechlorination of triallate. The subsequent reduction of such an alkyne intermediate gave S-allyl di-isopropyl thiocarbamate as main end by-product. The identified by-products suggested that dechlorination took place mainly via reductive beta-elimination. However, as traces of dichloroallyl di-isopropyl thiocarbamate were also detected, a role, although minor, was assigned even to hydrogenolysis in the overall dechlorination process.

ACS Style

Angela Volpe; Antonio Lopez; Giuseppe Mascolo; Antonia Detomaso. Chlorinated herbicide (triallate) dehalogenation by iron powder. Chemosphere 2004, 57, 579 -586.

AMA Style

Angela Volpe, Antonio Lopez, Giuseppe Mascolo, Antonia Detomaso. Chlorinated herbicide (triallate) dehalogenation by iron powder. Chemosphere. 2004; 57 (7):579-586.

Chicago/Turabian Style

Angela Volpe; Antonio Lopez; Giuseppe Mascolo; Antonia Detomaso. 2004. "Chlorinated herbicide (triallate) dehalogenation by iron powder." Chemosphere 57, no. 7: 579-586.

Short communication
Published: 06 November 2003 in Chemosphere
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The aim of this study was to check the effectiveness of the Fenton’s reagent (Fe2+ + H2O2 + H+) for the pre-treatment of a municipal landfill leachate with the objective of improving its overall biodegradability, evaluated in terms of BOD5/COD ratio, up to a value compatible with biological treatment. The leachate came from a municipal sanitary landfill located in southern Italy and the average values of its main parameters were: pH=8.2; COD=10 540 mg l−1; BOD5=2300 mg l−1; TOC=3900 mg l−1; NH4-N=5210 mg l−1; conductivity=45350 μS cm−1; alkalinity=21 470 mg l−1 CaCO3. The effect of initial pH value on the pre-treatment effectiveness was evaluated by titrating the amount of acidic by-products formed. The extent of leachate oxidation was monitored and controlled by both pH and redox potential measurements. The best operational conditions for achieving the desired goal (i.e., BOD5/COD ⩾ 0.5) resulted: Fe2+=275 mg l−1; H2O2=3300 mg l−1; initial pH=3; reaction time=2 h. At the end of the Fenton’s pre-treatment, in order to permit a subsequent biological treatment, residual ferric ions were removed increasing the pH up to 8.5 by adding 3 g l−1 of Ca(OH)2 and 3 mg l−1 of a cationic polyelectrolyte, the latter as an aid to coagulation. This final step also resulted in a further modest removal of residual COD due to co-precipitation phenomena.

ACS Style

Antonio Lopez; Michele Pagano; Angela Volpe; Appio Claudio Di Pinto. Fenton’s pre-treatment of mature landfill leachate. Chemosphere 2003, 54, 1005 -1010.

AMA Style

Antonio Lopez, Michele Pagano, Angela Volpe, Appio Claudio Di Pinto. Fenton’s pre-treatment of mature landfill leachate. Chemosphere. 2003; 54 (7):1005-1010.

Chicago/Turabian Style

Antonio Lopez; Michele Pagano; Angela Volpe; Appio Claudio Di Pinto. 2003. "Fenton’s pre-treatment of mature landfill leachate." Chemosphere 54, no. 7: 1005-1010.

Journal article
Published: 01 January 2003 in Applied Biochemistry and Biotechnology
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Sorption properties of olive husk were investigated under equilibrium (batch tests) and dynamic (column tests) conditions in order to assess the possibility of using such a waste material for removing heavy metals from aqueous streams. Husk samples were contacted, at 25 degrees C, with aqueous solutions of nitric salts of Pb, Cd, Cu, and Zn. Sorption isotherms obtained from equilibrium data were fitted and interpreted by the Freundlich model. Metals-saturated husk samples resulting from column tests were air-dried and incinerated to simulate combustion in order to assess the fate of sorbed metals. The results demonstrated that, under both equilibrium and dynamic conditions, metal sorption capacity of the husk was in the sequence Pb>Cd>Cu>Zn. For all the metals, calculated Freundlich constants decreased by increasing initial metal concentration or decreasing solution pH. In dynamic tests, a significant reduction of sorption capacity was recorded (except for copper) when a metal was fed simultaneously to the others: Pb (77%); Cd (93%); Zn (68%). Combustion tests carried out on metals-saturated husk samples showed that the average losses of lead and cadmium, as volatile species, were always three to four times greater than the losses of copper and zinc, in both single-metal- and multimetal-saturated samples.

ACS Style

Angela Volpe; Antonio Lopez; Michele Pagano. Olive husk: an alternative sorbent for removing heavy metals from aqueous streams. Applied Biochemistry and Biotechnology 2003, 110, 137 -150.

AMA Style

Angela Volpe, Antonio Lopez, Michele Pagano. Olive husk: an alternative sorbent for removing heavy metals from aqueous streams. Applied Biochemistry and Biotechnology. 2003; 110 (3):137-150.

Chicago/Turabian Style

Angela Volpe; Antonio Lopez; Michele Pagano. 2003. "Olive husk: an alternative sorbent for removing heavy metals from aqueous streams." Applied Biochemistry and Biotechnology 110, no. 3: 137-150.

Journal article
Published: 30 September 2000 in Reactive and Functional Polymers
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Biodegradation of organic pollutants is based on ‘destructive’ technologies leading to the formation of low-molecular-weight compounds and carbon dioxide or methane depending on the process red-ox conditions. This is not possible for persistent pollutants (e.g., heavy metals, biorefractory organics, complex organometals) independent of the origin and structure of the chemical substrate. Reference compounds can only be recovered and eventually recycled to the production lines of origin and/or to related industrial activities. However, the quality of the recovered products must justify the recycling operation. Sorption techniques (ion exchange, carbon adsorption) and membrane technology as typical ‘conservative’ unit operations allow for removal of pollutants to the strictest limits imposed by enforced legislation and simultaneous recovery and recycling. We discuss two examples of conservative environmental technologies, based on ion exchange and the use of reactive polymers. The first relates to metal-laden effluents from the tannery industry, and the second to the management of residues (clarifier sludge) from the drinking water industry. Both processes are aimed at the minimization of environmental impact resulting from the production lines (Cr(III)- and Al(III)-containing wastes, respectively) and the recovery of valuable by-products with the related economic revenues associated with their commercial value.

ACS Style

D Petruzzelli; A Volpe; A.C Di Pinto; R Passino. Conservative technologies for environmental protection based on the use of reactive polymers. Reactive and Functional Polymers 2000, 45, 95 -107.

AMA Style

D Petruzzelli, A Volpe, A.C Di Pinto, R Passino. Conservative technologies for environmental protection based on the use of reactive polymers. Reactive and Functional Polymers. 2000; 45 (2):95-107.

Chicago/Turabian Style

D Petruzzelli; A Volpe; A.C Di Pinto; R Passino. 2000. "Conservative technologies for environmental protection based on the use of reactive polymers." Reactive and Functional Polymers 45, no. 2: 95-107.