Facile detection of photogenerated reactive oxygen species in TiO2 nanoparticles suspension using colorimetric probe-assisted spectrometric method.


:This present study reports that reactive oxygen species (ROS), which mainly consist of hydroxyl (OH) and superoxide (O2(-)) radicals generated by the photocatalysis of TiO2 nanoparticles (TiO2 NPs) in suspension, can be quantitatively measured by the colorimetric probe-assisted spectrometric method without any interference by the TiO2 NPs. The interference effect of the TiO2 NPs with UV-vis spectroscopy was excluded by the selective separation of p-nitrosodimethylaniline (RNO) and tetrazolium salt (XTT) (probe compounds for OH and O2(-), respectively) from the TiO2 NPs in the suspension by centrifugation at a specified ionic strength adjusted with phosphate buffer (KH2PO4/NaOH, PB) solution. This colorimetric probe-assisted spectrometric method was also successfully applied to measure the steady-state production of photogenerated ROS in a TiO2 NPs suspension.






Kim C,Park HJ,Cha S,Yoon J




Has Abstract


2013-11-01 00:00:00














  • Mutagenic interactions of model chemical mixtures.

    abstract::Although current methodology for human health risk assessment assumes additive interactions among the contaminants of a complex mixture, chemical interactions may occur which produce synergistic or antagonistic effects. In this study, the mutagenic response of three f2p4l compounds, benzo(a)pyrene (B(a)P), pentachloro...


    pub_type: 杂志文章


    authors: Donnelly KC,Claxton LD,Huebner HJ,Capizzi JL

    更新日期:1998-09-01 00:00:00

  • Nano-crystal glass-ceramics obtained by crystallization of vitrified red mud.

    abstract::Glass has been obtained by melting red mud from Shandong Province in China with different additives. Suitable thermal treatments were employed to convert the obtained glass into nano-crystal glass-ceramics. X-ray diffraction (XRD) patterns showed that the main crystalline phase in both the glass-ceramics is wollastoni...


    pub_type: 杂志文章


    authors: Peng F,Liang KM,Shao H,Hu AM

    更新日期:2005-05-01 00:00:00

  • Distribution of organochlorine pesticides, polychlorinated biphenyls and alpha-HCH enantiomers in pork tissues.

    abstract::The distribution of HCH isomers, DDT analogues and selected PCB congeners in pork organs collected from the same individuals raised in Romanian farms was investigated. Organochlorine pesticides (HCHs and DDTs) were the principal contaminants in all samples, while PCB concentrations were low, in accordance with previou...


    pub_type: 杂志文章


    authors: Covaci A,Gheorghe A,Schepens P

    更新日期:2004-08-01 00:00:00

  • Reductive dechlorination of carbon tetrachloride using buffered alkaline ascorbic acid.

    abstract::Alkaline ascorbic acid (AA) was recently discovered as a novel in-situ chemical reduction (ISCR) reagent for remediating chlorinated solvents in the subsurface. For this ISCR process, the maintenance of an alkaline pH is essential. This study investigated the possibility of the reduction of carbon tetrachloride (CT) u...


    pub_type: 杂志文章


    authors: Lin YT,Liang C

    更新日期:2015-10-01 00:00:00

  • Occurrence of antibiotics and antibiotic resistance genes in the Fuxian Lake and antibiotic source analysis based on principal component analysis-multiple linear regression model.

    abstract::In recent years, the dramatic increase in antibiotic use has led to the evolution of antibiotic resistant genes (ARGs), posing a potential risk to human and aquatic ecological safety. In this study, source contribution and correlations between twelve antibiotics and their corresponding ARGs were firstly investigated i...


    pub_type: 杂志文章


    authors: Zhao B,Xu J,Zhang G,Lu S,Liu X,Li L,Li M

    更新日期:2021-01-01 00:00:00

  • Human exposure to toxic metals via contaminated dust: Bio-accumulation trends and their potential risk estimation.

    abstract::We assessed the levels of potentially toxic trace metals, Zinc (Zn), Lead (Pb), Manganese (Mn), Copper (Cu), Nickel (Ni), Chromium (Cr), Cobalt (Co), and Cadmium (Cd), in dust, hair, nail and serum, sampled in rural, urban and industrial areas of Punjab, Pakistan. Trace metals occurrence in all samples, in descending ...


    pub_type: 杂志文章


    authors: Mohmand J,Eqani SA,Fasola M,Alamdar A,Mustafa I,Ali N,Liu L,Peng S,Shen H

    更新日期:2015-08-01 00:00:00

  • Hydration behavior and immobilization mechanism of MgO-SiO2-H2O cementitious system blended with MSWI fly ash.

    abstract::MSWI(Municipal solid waste incineration) fly ash as hazardous wastes usually is treated properly with OPC(ordinary Portland cement) based binders prior to being disposed in security landfill, but some toxic elements present poor stability in its highly alkaline environment. This study developed a novel solidification/...


    pub_type: 杂志文章


    authors: Wang B,Fan C

    更新日期:2020-07-01 00:00:00

  • Improved preparation of small biological samples for mercury analysis using cold vapor atomic absorption spectroscopy.

    abstract::Concentrations of mercury in biological samples collected for environmental studies are often less than 0.1 microgram/g. Low mercury concentrations and small organ sizes in many wildlife species (approximately 0.1 g) increase the difficulty of mercury determination at environmentally relevant concentrations. We have d...


    pub_type: 杂志文章


    authors: Adair BM,Cobb GP

    更新日期:1999-05-01 00:00:00

  • Combining chemometric tools for assessing hazard sources and factors acting simultaneously in contaminated areas. Case study: "Mar Piccolo" Taranto (South Italy).

    abstract::Almost all marine coastal ecosystems possess complex structural and dynamic characteristics, which are influenced by anthropogenic causes and natural processes as well. Revealing the impact of sources and factors controlling the spatial distributions of contaminants within highly polluted areas is a fundamental propae...


    pub_type: 杂志文章


    authors: Mali M,Dell'Anna MM,Notarnicola M,Damiani L,Mastrorilli P

    更新日期:2017-10-01 00:00:00

  • Emissions and atmospheric concentrations of α-pinene at an urban site of India: Role of changes in meteorology.

    abstract::The measurements of a monoterpene (α-pinene) were performed by the PTR-TOF-MS instrument at an urban site of India from mid-January to March 2014. The daytime concentration increased from 0.15 ppb in the second-half of January to 0.40 ppb in the second-half of March. Both the nighttime and daytime ratios of α-pinene/b...


    pub_type: 杂志文章


    authors: Tripathi N,Sahu LK

    更新日期:2020-10-01 00:00:00

  • Combined fluorescent measurements, parallel factor analysis and GC-mass spectrometry in evaluating the photodegradation of PAHS in freshwater systems.

    abstract::To better understand the transformation and photochemical fate of PAHs in aquatic environments, a custom-designed closed-circuit recirculation photodegradation system, combined with inline semi-continuous fluorescence and absorbance measurements, as well as modelling of excitation-emission (EEM) measurements with para...


    pub_type: 杂志文章


    authors: Seopela MP,Powers LC,Clark C,Heyes A,Gonsior M

    更新日期:2020-12-21 00:00:00

  • Organochlorine pesticides levels in Portuguese coastal areas.

    abstract::Data on levels of persistent organochlorine pesticides (OCPs) that exhibit potentially harmful effects to the environment all over the Portuguese coastal sediments were scarce. Therefore, in 2007-2008 12 OCPs were surveyed in surface sediments from 11 coastal sites (estuarine or lagoonal) covering north, centre and so...


    pub_type: 杂志文章


    authors: Carvalho PN,Rodrigues PNR,Basto MCP,Vasconcelos MTSD

    更新日期:2009-05-01 00:00:00

  • New insights into the chemical forms of extremely high methylmercury in songbird feathers from a contaminated site.

    abstract::The chemical forms of mercury (Hg), particularly methylmercury (MeHg), in songbird feathers from an abandoned mining region were analyzed via X-ray absorption near-edge structure analysis (XANES). In feathers, proportions of MeHg as total mercury (75.6-100%) quantified by the XANES were directly comparable to the chem...


    pub_type: 杂志文章


    authors: Xu Z,Abeysinghe KS,Xu X,Gu C,Liang L,Lu Q,Zhang Y,Zheng L,Wang WX,Qiu G

    更新日期:2019-06-01 00:00:00

  • Rapid analysis of multi-pesticide residues in lotus seeds by a modified QuEChERS-based extraction and GC-ECD.

    abstract::A modified quick, easy, cheap, efficient, rugged and safe method (QuEChERS) coupled to gas chromatography with electron capture detector (GC-ECD) was developed for rapid extraction and simultaneous determination of 36 pesticides in lotus seeds. The extraction solvent (acetone, ethyl acetate, acetonitrile, n-hexane and...


    pub_type: 杂志文章


    authors: Miao Q,Kong W,Yang S,Yang M

    更新日期:2013-05-01 00:00:00

  • The role of hydrogenotrophic methanogens in an acidogenic reactor.

    abstract::A laboratory-scale acidogenic anaerobic sequencing batch reactor was set up to test the effect of pH change on microbial community structure of the reactor biomass and process performance. No immediate performance change on acidogenesis was observed after the pH change. However, as the hydrogenotrophic methanogen popu...


    pub_type: 杂志文章


    authors: Huang W,Wang Z,Zhou Y,Ng WJ

    更新日期:2015-12-01 00:00:00

  • Peroxidation and unsaturation coefficients as biomarkers of environmental micro-exposure to molluscicides in Helix pomatia L.

    abstract::This study was a follow-up of a previous study that investigated a set of selected fatty acids (FAs; 12 of 56 pools) in Helix pomatia L. as biomarkers of chemical stress induced by applying micro-doses of molluscicides. Here, the potential of rarely used peroxidation (PI) and unsaturation (UI) coefficients were tested...


    pub_type: 杂志文章


    authors: Kowalczyk-Pecka D,Kowalczuk-Vasilev E,Puchalski A,Kiczorowska B,Samolińska W,Stryjecki R,Czepiel-Mil K

    更新日期:2019-11-01 00:00:00

  • Photocatalytic oxidation of gaseous chlorinated organics over titanium dioxide.

    abstract::The photocatalytic oxidation of high levels of volatile chlorinated organic compounds in gas phase has been studied using a specially designed photoreactor. The influence of light intensity, initial water vapour concentration, temperature, inlet contaminant concentration and flow rate on destruction efficiency has bee...


    pub_type: 杂志文章


    authors: Hager S,Bauer R,Kudielka G

    更新日期:2000-10-01 00:00:00

  • Treatment of anthraquinone dye textile wastewater using anaerobic dynamic membrane bioreactor: Performance and microbial dynamics.

    abstract::The performance and microbial community structure of anaerobic dynamic membrane bioreactor (AnDMBR) treating textile wastewater was investigated. The reactor showed excellent soluble COD and color removal of 98.5% and >97.5%, respectively. Dynamic membrane layer grown over the 3D printed dynamic membrane support showe...


    pub_type: 杂志文章


    authors: Berkessa YW,Yan B,Li T,Jegatheesan V,Zhang Y

    更新日期:2020-01-01 00:00:00

  • Chromium(VI) bioremediation by aquatic macrophyte Callitriche cophocarpa Sendtn.

    abstract::Callitriche cophocarpa (water-starwort)--aquatic widespread macrophyte--was found to be an excellent chromium accumulator. The plants were exposed to various chromium(VI) concentration ranging from 50 to 700 microM in a hydroponic culture up to ca. 3 weeks. Physiological conditions of shoots were monitored via measuri...


    pub_type: 杂志文章


    authors: Augustynowicz J,Grosicki M,Hanus-Fajerska E,Lekka M,Waloszek A,Kołoczek H

    更新日期:2010-05-01 00:00:00

  • Roundup® exposure promotes gills and liver impairments, DNA damage and inhibition of brain cholinergic activity in the Amazon teleost fish Colossoma macropomum.

    abstract::Roundup Original® (RD) is a glyphosate-based herbicide used to control weeds in agriculture. Contamination of Amazon waters has increased as a consequence of anthropogenic pressure, including the use of herbicides as RD. The central goal of this study was to evaluate the toxic effects of RD on juveniles of tambaqui (C...


    pub_type: 杂志文章


    authors: Braz-Mota S,Sadauskas-Henrique H,Duarte RM,Val AL,Almeida-Val VM

    更新日期:2015-09-01 00:00:00

  • Hydrogeochemical and isotopic evaluation of groundwater with elevated arsenic in alkaline aquifers in Eastern Punjab, Pakistan.

    abstract::Geochemical investigation was carried out for delineating factors responsible for the mobilization of arsenic (As) from aquifer material into the groundwater. Four sites along Ravi River, (Samada, Sarai Chimba, Kot Maiga and Chah Fatehwala), were selected based on the blanket survey. Groundwater-rock interaction and e...


    pub_type: 杂志文章


    authors: Mushtaq N,Younas A,Mashiatullah A,Javed T,Ahmad A,Farooqi A

    更新日期:2018-06-01 00:00:00

  • Evidence for bisphenol A-induced disruption of maternal thyroid homeostasis in the pregnant ewe at low level representative of human exposure.

    abstract::Many uncertainties remain regarding the potential of bisphenol A (BPA) as a thyroid disruptor in mammals and the relevance of experimental data to humans. The relevance of the exposure schemes used in experimental in vivo studies is also a major source of uncertainty when analysing the risk of BPA exposure for human h...


    pub_type: 杂志文章


    authors: Guignard D,Gayrard V,Lacroix MZ,Puel S,Picard-Hagen N,Viguié C

    更新日期:2017-09-01 00:00:00

  • Immobilisation of high-arsenic-containing tailings by using metallurgical slag-cementing materials.

    abstract::The mixture of finely ground blast furnace slag (BFS), basic oxygen furnace (BOF) steel slag (SS), and flue gas desulfurisation (FGD) gypsum could be used as cement to solidify heavy metals. In this study, these cementitious materials were combined with high-arsenic-containing tailings to form cemented backfill materi...


    pub_type: 杂志文章


    authors: Zhang Y,Zhang S,Ni W,Yan Q,Gao W,Li Y

    更新日期:2019-05-01 00:00:00

  • Beneficial dual role of biochars in inhibiting soil acidification resulting from nitrification.

    abstract::The dual role of biochar for inhibiting soil acidification induced by nitrification was determined through two-step incubation experiments in this study. Ca(OH)2 or biochar was added respectively to adjust soil pH to the same values (pH 5.15 and 5.85), and then the amended soils were incubated in the presence of urea ...


    pub_type: 杂志文章


    authors: Shi RY,Ni N,Nkoh JN,Li JY,Xu RK,Qian W

    更新日期:2019-11-01 00:00:00

  • Development of rearing and testing protocols for a new freshwater sediment test species: the gastropod Valvata piscinalis.

    abstract::This paper aimed at proposing rearing and testing protocols for Valvata piscinalis, a new potential species for sediment toxicity testing. Such tests were developed since this species reliably represents the bio/ecological characteristics of other gastropods. It may thus be representative of their sensitivity to chemi...


    pub_type: 杂志文章


    authors: Ducrot V,Cognat C,Mons R,Mouthon J,Garric J

    更新日期:2006-03-01 00:00:00

  • The silvering process of European eel (Anguilla anguilla) influences PAH metabolite concentrations in bile fluid: consequences for monitoring.

    abstract::The stock of the catadromous European eel (Anguilla anguilla L.) continues to decline and there is growing evidence that poor health status due to contaminants might be a key element in this decrease. Organic contaminants such as polycyclic aromatic hydrocarbons (PAHs) belong to the major threats to yellow eel in thei...


    pub_type: 杂志文章


    authors: Nagel F,Wagner C,Hanel R,Kammann U

    更新日期:2012-03-01 00:00:00

  • Nanostructured 3D-porous graphene hydrogel based Ti/Sb-SnO2-Gr electrode with enhanced electrocatalytic activity.

    abstract::Nanostructured highly porous 3D-Ti/Sb-SnO2-Gr electrode, based on 3D porous graphene hydrogel was fabricated via a fast-evaporation technique through layer by layer (LBL) deposition. The 3D pores are uniformly distributed on the high fidelity of substrate with pore sizes of 7-12 nm, as confirmed by SEM analysis. Compa...


    pub_type: 杂志文章


    authors: Asim S,Zhu Y,Rana M,Yin J,Shah MW,Li Y,Wang C

    更新日期:2017-02-01 00:00:00

  • Effects of lead (Pb) in stormwater runoff on the microbial characteristics and organics removal in bioretention systems.

    abstract::Bioretention systems have been proved to be a natural approach for effectively reducing stormwater runoff pollution loads. However, the effects of heavy metals in stormwater runoff on microbial characteristics and organics removal in bioretention systems are unclear. In this study, two lab scale bioretention columns i...


    pub_type: 杂志文章


    authors: Liu C,Lu J,Liu J,Mehmood T,Chen W

    更新日期:2020-08-01 00:00:00

  • 2,5,6,9,10-Pentabromocyclododecanols (PBCDOHs): a new class of HBCD transformation products.

    abstract::Pentabromocyclododecanols (PBCDOHs) are potential environmental transformation products of hexabromocyclododecanes (HBCDs). They are also potential stage one metabolites of biological HBCD transformations. Herein, we present analytical evidence that PBCDOHs are also constituents of technical HBCDs and flame-proofed po...


    pub_type: 杂志文章


    authors: Heeb NV,Zindel D,Schweizer WB,Lienemann P

    更新日期:2012-07-01 00:00:00

  • Remediation of organochlorine pesticides (OCPs) contaminated site by successive methyl-β-cyclodextrin (MCD) and sunflower oil enhanced soil washing - Portulaca oleracea L. cultivation.

    abstract::An innovative ex situ soil washing technology was developed in this study to remediate organochlorine pesticides (OCPs)-contaminated site. Elevated temperature (50 °C) combined with ultrasonication (35 kHz, 30 min) at 25 g L(-1) methyl-β-cyclodextrin and 100 mL L(-1) sunflower oil were effective in extracting OCPs fro...


    pub_type: 杂志文章


    authors: Ye M,Sun M,Hu F,Kengara FO,Jiang X,Luo Y,Yang X

    更新日期:2014-06-01 00:00:00