Abstract:
:This work deals with the electrochemical degradation and mineralization of perfluorooctanoic acid (PFOA). Model aqueous solutions of PFOA (100mg/L) were electro-oxidized under galvanostatic conditions in a flow-by undivided cell provided with a tungsten cathode and an anode formed by a commercial ultrananocrystalline boron doped diamond (BDD) coating on a niobium substrate. A systematic experimental study was conducted in order to analyze the influence of the following operation variables: (i) the supporting electrolyte, NaClO4 (1.4 and 8.4g/L) and Na2SO4 (5g/L); (ii) the applied current density, japp, in the range 50-200 A/m(2) and (iii) the hydrodynamic conditions, in terms of flowrate in the range 0.4×10(-4)-1.7×10(-4)m(3)/s and temperature in the range 293-313K. After 6h of treatment and at japp 200A/m(2), PFOA removal was higher than 93% and the mineralization ratio, obtained from the decrease of the total organic carbon (TOC) was 95%. The electrochemical generation of hydroxyl radicals in the supporting electrolyte was experimentally measured based on their reaction with dimethyl sulfoxide. The enhanced formation of hydroxyl radicals at higher japp was related to the faster kinetics of PFOA removal. The fitting of experimental data to the proposed kinetic model provided the first order rate constants of PFOA degradation, kc(1) that moved from 2.06×10(-4) to 15.58×10(-4)s(-1), when japp varied from 50 to 200A/m(2).
journal_name
Chemospherejournal_title
Chemosphereauthors
Urtiaga A,Fernández-González C,Gómez-Lavín S,Ortiz Idoi
10.1016/j.chemosphere.2014.05.090subject
Has Abstractpub_date
2015-06-01 00:00:00pages
20-6eissn
0045-6535issn
1879-1298pii
S0045-6535(14)00744-9journal_volume
129pub_type
杂志文章相关文献
CHEMOSPHERE文献大全abstract::The photochemical reaction between biphenyl (Bp) and N(III) under irradiation at 365 nm UV light was investigated. The results showed that Bp conversion efficiency was strongly influenced by N (III) concentration, Bp initial concentration and pH. Species-specific rate constants determined by reaction of Bp with H2ONO+...
journal_title:Chemosphere
pub_type: 杂志文章
doi:10.1016/j.chemosphere.2016.10.010
更新日期:2017-01-01 00:00:00
abstract::Seasonal variations in physiological and biochemical parameters of the aquatic fern Salvinia minima exposed to different Cr(VI) concentrations were studied. Growth, photosynthetic pigments, soluble carbohydrates, sucrose-related enzymes, lipid peroxidation, phenolics, and Cr accumulation in floating and submerged leav...
journal_title:Chemosphere
pub_type: 杂志文章
doi:10.1016/j.chemosphere.2010.08.033
更新日期:2010-10-01 00:00:00
abstract::Quantitative structure property relationships (QSPR) for the pKa of phenols, carboxylic acids and alcohols were developed from descriptors derived from semi-empirical molecular orbital theory quantum chemical calculations. A training set of compounds were used to refine the models and a validation set of appropriate c...
journal_title:Chemosphere
pub_type: 杂志文章
doi:10.1016/s0045-6535(98)00172-6
更新日期:1999-01-01 00:00:00
abstract::Diffusive isotope fractionation of non- and perdeuterated benzenes and toluenes in aqueous solution was investigated. The experimental method was based on a Stokes diaphragm cell. The isotope composition of diffusate and retentate was found to be identical within a range of uncertainty of ±5‰ for benzene and ±10‰ for ...
journal_title:Chemosphere
pub_type: 杂志文章
doi:10.1016/j.chemosphere.2020.127357
更新日期:2020-11-01 00:00:00
abstract::The number, morphology and elemental composition of nanoparticles (<100 nm) in marine water was investigated using Variable Pressure Scanning Electron Microscopy (VP-SEM) and Energy-dispersive X-ray spectroscopy (EDS). Preliminary research conducted in the Baltic Sea showed that the number of nanoparticles in seawater...
journal_title:Chemosphere
pub_type: 杂志文章
doi:10.1016/j.chemosphere.2018.05.022
更新日期:2018-09-01 00:00:00
abstract::To assess the level of uncertainty related to storage and physical preparation, 27 combined samples of moss species Pleurozium schreberi (Brid.) Mitt and their duplicates were collected within three forest areas. Each sample was divided into three sub-samples subjected to further treatment: D - drying (20-25 °C), F - ...
journal_title:Chemosphere
pub_type: 杂志文章
doi:10.1016/j.chemosphere.2019.125040
更新日期:2020-02-01 00:00:00
abstract::Generation of gaseous nanobubbles (NBs) by simple, efficient, and scalable methods is critical for industrialization and applications of nanobubbles. Traditional generation methods mainly rely on hydrodynamic, acoustic, particle, and optical cavitation. These generation processes render issues such as high energy cons...
journal_title:Chemosphere
pub_type: 杂志文章
doi:10.1016/j.chemosphere.2018.03.157
更新日期:2018-07-01 00:00:00
abstract::A system of recirculating channels was used in this study to examine the long-term effects (29d) of environmentally realistic concentrations of the herbicide diuron (from 0.07 to 7 microg L(-1)) on biofilm communities. The autotrophic activity of biofilms was affected by this herbicide, as reflected by a marked decrea...
journal_title:Chemosphere
pub_type: 杂志文章
doi:10.1016/j.chemosphere.2009.06.017
更新日期:2009-09-01 00:00:00
abstract::In the present work the effect of the alkyl chain length and the position of the sulfophenyl substituent of the linear alkylbenzene sulfonates (LAS) on their anaerobic biodegradability have been investigated. Degradation kinetics of the linear alkyl benzene sulfonates homologues, 2phiC10LAS, 2phiC12LAS and 2phiC14LAS,...
journal_title:Chemosphere
pub_type: 杂志文章
doi:10.1016/j.chemosphere.2005.02.048
更新日期:2005-09-01 00:00:00
abstract::During foraging, bees are exposed to sublethal doses of insecticides, which can cause morphological changes to various organs, such as the midgut, Malpighian tubules, and mushroon body. Thus, the purpose of this study was to establish a scoring system to evaluate these alterations based on the damage caused and its re...
journal_title:Chemosphere
pub_type: 杂志文章
doi:10.1016/j.chemosphere.2019.06.225
更新日期:2019-12-01 00:00:00
abstract::Considerable research has focused on the fate of 17β-estradiol (17β-E2) given its high estrogenic potency and frequent detection in the environment; however, little is known about the fate behavior of 17α-estradiol (17α-E2) although it often dominates in some animal feces, and recently has been shown to have similar i...
journal_title:Chemosphere
pub_type: 杂志文章
doi:10.1016/j.chemosphere.2012.09.032
更新日期:2013-01-01 00:00:00
abstract::Lipids generally represent the major matrix contributing to the absorptive capacity for hydrophobic organic contaminants in aquatic ecosystems. The aim of the present study was to determine whether contaminants partition to a different degree to the different storage lipid classes: wax ester (WE) and triacylglycerol (...
journal_title:Chemosphere
pub_type: 杂志文章
doi:10.1016/j.chemosphere.2020.127890
更新日期:2021-01-01 00:00:00
abstract::The fate of spiked anthracene, pyrene and benzo[a]pyrene in soil with or without sewage sludge compost was assessed during a 6-month bioremediation process simulating landfarming. Bioassays and physico-chemical analyses were employed to monitor toxicity change in soil samples and elutriates through ten sampling campai...
journal_title:Chemosphere
pub_type: 杂志文章
doi:10.1016/j.chemosphere.2006.03.065
更新日期:2006-11-01 00:00:00
abstract::Bitumen mining in the Canadian oil sands creates large volumes of oil sands process-affected water (OSPW), the toxicity of which is due in part to naphthenic acids (NAs) and other acid extractable organics (AEO). The objective of this work was to evaluate the potential of solar photocatalysis over TiO2 to remove AEO f...
journal_title:Chemosphere
pub_type: 杂志文章
doi:10.1016/j.chemosphere.2015.10.073
更新日期:2016-02-01 00:00:00
abstract::Limited literature exists on toxaphene contamination in food worldwide, particularly in mainland China. In this study, three toxaphene congeners, Parlar 26 (B8-1413), Parlar 50 (B9-1679) and Parlar 62 (B9-1025), were analyzed in five different food categories from the Pearl River Delta Area in China using isotope dilu...
journal_title:Chemosphere
pub_type: 杂志文章
doi:10.1016/j.chemosphere.2016.02.121
更新日期:2016-06-01 00:00:00
abstract::A facile and effective method has been developed to prepare hierarchical porous carbon nanofibers (PCNFs), carbon nanofibers supported nickel nanoparticles (PCNFs-Ni) and carbon nanofibers encapsulating gold nanoparticles (PCNFs-Au). PCNFs or PCNFs-Au were obtained by embedding metal-organic frameworks (e.g. ZIF-8 or ...
journal_title:Chemosphere
pub_type: 杂志文章
doi:10.1016/j.chemosphere.2019.124833
更新日期:2020-01-01 00:00:00
abstract::Polychlorinated diphenyl ethers (PCDEs), 2,3,7,8-substituted polychlorinated dibenzo-p-dioxins (PCDDs) and dibenzofurans (PCDFs), and polychlorinated biphenyls (PCBs) were analyzed in seals from the Gulf of Finland and in sediments from the Gulf of Finland and near Gotland. The sediments included one surface core from...
journal_title:Chemosphere
pub_type: 杂志文章
doi:10.1016/s0045-6535(97)00212-9
更新日期:1997-09-01 00:00:00
abstract::Heterogeneous catalytic ozonation was emerged to be a promising alternative in the mineralization of various persistent organic pollutants in recent decades. Magnetic pyrite cinder (PyC), which was employed as the catalyst in our investigation, was further deposited by Ce (Ce-PyC) to enhance its catalytic activity in ...
journal_title:Chemosphere
pub_type: 杂志文章
doi:10.1016/j.chemosphere.2016.04.041
更新日期:2016-07-01 00:00:00
abstract::Arsenic (As)-polluted groundwater constitutes a serious problem for peanut plants, as roots can accumulate the metalloid in their edible parts. Characterization of stress responses to As may help to detect potential risks and identify mechanisms of tolerance, being the induction of oxidative stress a key feature. Fift...
journal_title:Chemosphere
pub_type: 杂志文章
doi:10.1016/j.chemosphere.2017.04.104
更新日期:2017-08-01 00:00:00
abstract::Addition of granular materials to floating crude oil slicks can be effective in capturing and densifying the floating hydrophobic phase, which settles by gravity. Interaction of light hydrophobic liquids (LHL) with quartz sand was investigated in LHL-salt water systems. The LHLs studied were decane, tetradecane, hexad...
journal_title:Chemosphere
pub_type: 杂志文章
doi:10.1016/j.chemosphere.2015.10.019
更新日期:2016-02-01 00:00:00
abstract::1,4-Dioxane (dioxane), a probable human carcinogen, is used as a solvent stabilizer for 1,1,1-trichloroethane (TCA) and other chlorinated solvents. Consequently, TCA and its abiotic breakdown product 1,1-dichloroethene (DCE) are common co-contaminants of dioxane in groundwater. The aerobic degradation of dioxane by mi...
journal_title:Chemosphere
pub_type: 杂志文章
doi:10.1016/j.chemosphere.2012.10.104
更新日期:2013-03-01 00:00:00
abstract::The environmental presence of organic micro-pollutants (OMPs) has posed increasing risks on aquatic organism and human health. The performance of three commonly used advanced wastewater treatment trains, coagulation-sand filter, coagulation-biological aerated filter (BAF) and ozonation-biological activated carbon (BAC...
journal_title:Chemosphere
pub_type: 杂志文章
doi:10.1016/j.chemosphere.2017.09.092
更新日期:2017-12-01 00:00:00
abstract::The electrochemical oxidation of the biotic degradation products of the textile dye C.I. Acid Orange 7 (AO7) was achieved using a boron doped diamond electrode (BDD). Tests were performed with model solutions of the biotic degradation products, sulphanilic acid (SA) and 1-amino-2-naphthol (AN), and also with real effl...
journal_title:Chemosphere
pub_type: 杂志文章
doi:10.1016/j.chemosphere.2006.10.062
更新日期:2007-04-01 00:00:00
abstract::Chlorinated aromatics undergo surface-mediated reactions with metal oxides to form Environmentally Persistent Free Radicals (EPFRs) which can further react to produce polychlorinated dibenzo-p-dioxins and dibenzofurans (PCDD/Fs). Previous work using laboratory-made fly ash surrogates composed of transition metal oxide...
journal_title:Chemosphere
pub_type: 杂志文章
doi:10.1016/j.chemosphere.2015.11.009
更新日期:2016-02-01 00:00:00
abstract::Quinestrol is synthetic estrogen used in contraceptive and hormone replacement therapy and occasionally for treating breast cancer and prostate cancer. It can make its way into the environment through sewage discharge and waste disposal produced by human excretions. In this study, the photodegradation kinetics of quin...
journal_title:Chemosphere
pub_type: 杂志文章
doi:10.1016/j.chemosphere.2012.06.011
更新日期:2012-11-01 00:00:00
abstract::In this study, low-temperature catalytic NO oxidation with H2O2 over Na- and H-exchanged Y and ZSM-5 zeolites was investigated at 140 °C which is the average exhaust temperature of coal-fired power plant. Fast catalytic NO oxidation rates were observed over H-zeolites, and catalytic activity was proportional to the am...
journal_title:Chemosphere
pub_type: 杂志文章
doi:10.1016/j.chemosphere.2020.126561
更新日期:2020-07-01 00:00:00
abstract::Photochemical behavior of various polycyclic aromatic hydrocarbons (PAHs) on Fe3+-modified montmorillonite was explored to determine their potential kinetics, pathways, and mechanism under visible light. Depending on the type of PAH molecules, the transformation rate follows the order of benzo[a]pyrene ≈ anthracene > ...
journal_title:Chemosphere
pub_type: 杂志文章
doi:10.1016/j.chemosphere.2017.06.106
更新日期:2017-10-01 00:00:00
abstract::Soil and atmospheric concentrations, dry deposition and soil-air gas exchange of organochlorine pesticides (OCPs) were investigated at an industrial site in Aliaga, Izmir, Turkey. Current-use pesticides, endosulfan and chlorpyrifos, had the highest atmospheric levels in summer and winter. Summertime total (gas+particl...
journal_title:Chemosphere
pub_type: 杂志文章
doi:10.1016/j.chemosphere.2009.09.032
更新日期:2009-11-01 00:00:00
abstract::The attapulgite supported nanoscale zero-valent iron composite (AT-nZVI) was synthesized and used for Cr(VI) removal. X-ray diffraction (XRD) and transmission electron microscope (TEM) indicated that nZVI particles were well distributed and immobilized on the attapulgite surface. Batch experiments of Cr(VI) removal we...
journal_title:Chemosphere
pub_type: 杂志文章
doi:10.1016/j.chemosphere.2019.01.070
更新日期:2019-04-01 00:00:00
abstract::Polysaccharide fouling poses a significant challenge in the widespread application of membrane filtration for water purification. In order to mitigate the problem, a polysaccharide-degrading enzyme alginate lyase (Alg L; EC 4.2.2.3) was successfully immobilized on cellulose acetate ultrafiltration membrane using a dea...
journal_title:Chemosphere
pub_type: 杂志文章
doi:10.1016/j.chemosphere.2016.09.017
更新日期:2016-12-01 00:00:00