Photodegradation of new amino acid derivatives suitable for chelating agents in pulp bleaching applications.


:The purpose of this study was to evaluate photodegradabilities of the following new low-nitrogen chelating agents: N-bis[(carboxymethoxy)ethyl]glycine (compound 1), N-bis[(1,2-dicarboxyethoxy)ethyl]glycine (compound 2) and N-bis[(1,2-dicarboxyethoxy)ethyl]aspartic acid (compound 3). At first photodegradation of these chelating agents as uncomplexed Na-compound 1-3 and Cu(II) complexes were tested, both in lake and distilled water, by exposing them to near-UV region radiation at the range of 315-400 nm. Uncomplexed Na-compounds 2 and 3 were selected to sunlight exposure experiments carried out in lake and distilled water. Compound 3 was also tested in sunlight as Cu and Ca complexes in both solutions. Photodegradation of Na(6)-compound 3 in distilled water was studied by exposing it to radiation at the wavelength of 253.7 nm. Photodegradation products were analysed by means of GC-MS (gas chromatography with mass selective detector). The results demonstrated that compound 1 was quite photostable even as Cu complex while compounds 2 and 3 were found to be photodegradable. Over 90% reduction of compound 3 was achieved during one week and 80% reduction of compound 2 in two weeks' time when they were added as Na salt to lake water and exposed to sunlight. Compound 3 as Cu complex degraded totally in the sunlight in less than one week. In the case of compound 3, the degradation rate decreased depending on the counter cation in the order Cu > Na > or = Ca. The study demonstrated that photodegradation of Na(6)-compound 3 does not result in total mineralization of the compound. A photodegradation pathway for Na(6)-compound 3 is proposed.






Metsärinne S,Peltonen P,Aksela R,Tuhkanen T




Has Abstract


2004-09-01 00:00:00














  • Enhanced removal of tetrachloroethylene from aqueous solutions by biodegradation coupled with nZVI modified by layered double hydroxide.

    abstract::Chlorinated volatile organic compounds, such as tetrachloroethylene (PCE), are the most commonly detected toxic contaminants in groundwater. In this study, the performance of PCE removal by a microbial consortium combined with nZVI modified by layered double hydroxide (nZVI-LDH) was evaluated. The enriched PCE-degradi...


    pub_type: 杂志文章


    authors: Wang Q,Song X,Tang S,Yu L

    更新日期:2020-03-01 00:00:00

  • Discrimination of rare earth element geochemistry and co-occurrence in sediment from Poyang Lake, the largest freshwater lake in China.

    abstract::Geochemical distribution of trace elements in sediments could reflect the impact of anthropogenic activities on environmental changes in aquatic ecosystems. In this study, rare earth elements (REEs) were used as geochemical tracers to study the environmental processes in a complex and dynamic aquatic environment. Both...


    pub_type: 杂志文章


    authors: Wang L,Han X,Liang T,Guo Q,Li J,Dai L,Ding S

    更新日期:2019-02-01 00:00:00

  • Mixing regime as a key factor to determine DON formation in drinking water biological treatment.

    abstract::Dissolved organic nitrogen (DON) can act as precursor of nitrogenous disinfection by-products formed during chlorination disinfection. The performances of biological fluidized bed (continuous stirred tank reactor, CSTR) and bio-ceramic filters (plug flow reactor, PFR) were compared in this study to investigate the inf...


    pub_type: 杂志文章


    authors: Lu C,Li S,Gong S,Yuan S,Yu X

    更新日期:2015-11-01 00:00:00

  • Heavy metals in leachate, impacted soils and natural soils of different landfills in Malaysia: An alarming threat.

    abstract::Landfills are a potential threat to human health and the environment, especially from the detrimental and toxic heavy metals. This study focuses on the assessment of heavy metals contamination in leachate and surface soils from different landfills in Malaysia. Maximum quality rating scale (QRS) values of As (787) and ...


    pub_type: 杂志文章


    authors: Hussein M,Yoneda K,Mohd-Zaki Z,Amir A,Othman N

    更新日期:2021-03-01 00:00:00

  • Heavy metal fractions and ecological risk assessment in sediments from urban, rural and reclamation-affected rivers of the Pearl River Estuary, China.

    abstract::Rapid urbanization and reclamation processes in coastal areas have resulted in serious pollution to the aquatic environment. Less is known on the geochemical fractions and ecological risks in river sediment under various human activities pressures, which is essential for addressing the connections between heavy metal ...


    pub_type: 杂志文章


    authors: Zhang G,Bai J,Xiao R,Zhao Q,Jia J,Cui B,Liu X

    更新日期:2017-10-01 00:00:00

  • Efficient use of Fe metal as an electron transfer agent in a heterogeneous Fenton system based on Fe0/Fe3O4 composites.

    abstract::In this work a novel heterogeneous Fenton system based on Fe(0)/Fe3O4 composites is described. The composites with several Fe(0)/Fe3O4 ratios were prepared by two different methods, i.e. mechanical alloying of Fe(0) and Fe3O4 powders and controlled reduction of Fe3O4 with H2. Reaction studies and detailed Conversion E...


    pub_type: 杂志文章


    authors: Moura FC,Araujo MH,Costa RC,Fabris JD,Ardisson JD,Macedo WA,Lago RM

    更新日期:2005-08-01 00:00:00

  • Formation of metal-organic ligand complexes affects solubility of metals in airborne particles at an urban site in the Po valley.

    abstract::Metals in atmospheric aerosols play potentially an important role in human health and ocean primary productivity. However, the lack of knowledge about solubility and speciation of metal ions in the particles or after solubilisation in aqueous media (sea or surface waters, cloud or rain droplets, biological fluids) lim...


    pub_type: 杂志文章


    authors: Tapparo A,Di Marco V,Badocco D,D'Aronco S,Soldà L,Pastore P,Mahon BM,Kalberer M,Giorio C

    更新日期:2020-02-01 00:00:00

  • Metal tolerant bacteria enhanced phytoextraction of lead by two accumulator ornamental species.

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    pub_type: 杂志文章


    authors: Manzoor M,Gul I,Ahmed I,Zeeshan M,Hashmi I,Amin BAZ,Kallerhoff J,Arshad M

    更新日期:2019-07-01 00:00:00

  • Bioavailability of zinc in runoff water from roofing materials.

    abstract::Corrosion and runoff from zinc-coated materials and outdoor structures is an important source for the dispersion of zinc in the environment. Being part of a large inter-disciplinary research project, this study presents the bioavailability of zinc in runoff water immediately after release from the surface of 15 differ...


    pub_type: 杂志文章


    authors: Heijerick DG,Janssen CR,Karlèn C,Wallinder IO,Leygraf C

    更新日期:2002-06-01 00:00:00

  • Determination of 99Tc deposited on the ground within the 30-km zone around the Chernobyl reactor and estimation of 99Tc released into atmosphere by the accident.

    abstract::Technetium-99 was determined in samples from the 30-km zone around the Chernobyl reactor. Concentrations of 99Tc in soil samples taken from three forest sites ranged from 1.1 to 14.1 Bq kg-1 dry weight for the organic soil layers, and from 0.13 to 0.83 Bq kg-1 dry weight for the mineral soil layers. In particular, for...


    pub_type: 杂志文章


    authors: Uchida S,Tagami K,Rühm W,Wirth E

    更新日期:1999-12-01 00:00:00

  • Monitoring of atrazine in milk using a rapid tube-based ELISA and validation with HPLC.

    abstract::Although atrazine has been banned in the European Union since 2007 it still persists in soil from where it can enter the food chain. Milk-producing animals accumulate atrazine from contaminated feed and water and since large quantities of milk and milk products are consumed its quality should be constantly monitored. ...


    pub_type: 杂志文章


    authors: Barchanska H,Jodo E,Price RG,Baranowska I,Abuknesha R

    更新日期:2012-06-01 00:00:00

  • Effects of the neurotoxic thionophosphate pesticide chlorpyrifos on differentiating alternative models.

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    pub_type: 杂志文章


    authors: Amaroli A,Aluigi MG,Falugi C,Chessa MG

    更新日期:2013-02-01 00:00:00

  • Effects of aluminum on physiological metabolism and antioxidant system of wheat (Triticum aestivum L.).

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    pub_type: 杂志文章


    authors: Dong B,Sang WL,Jiang X,Zhou JM,Kong FX,Hu W,Wang LS

    更新日期:2002-04-01 00:00:00

  • Determination of estrogenic activity by LYES-assay (yeast estrogen screen-assay assisted by enzymatic digestion with lyticase).

    abstract::In order to enhance the sensitivity and the speed of the yeast estrogen screen (YES)-assay, which has been established in many laboratories for the determination of estrogenic activity of compounds and environmental samples, the LYES-assay, a modified version of the YES-assay including a digestion step with the enzyme...


    pub_type: 杂志文章


    authors: Schultis T,Metzger JW

    更新日期:2004-12-01 00:00:00

  • Prediction of free metal ion activity in contaminated soils using WHAM VII, baker soil test and solubility model.

    abstract::Bioavailability and ecotoxicity of metals in contaminated soils depend largely on their solubility. The present investigation was carried out to predict the free ion activity of Zn2+, Cu2+, Ni2+, Pb2+ and Cd2+ in contaminated soils as a function of pH, organic carbon content and extractable metal concentration. Twenty...


    pub_type: 杂志文章


    authors: Golui D,Datta SP,Dwivedi BS,Meena MC,Trivedi VK

    更新日期:2020-03-01 00:00:00

  • Determination of uptake, accumulation, and stress effects in corn (Zea mays L.) grown in single-wall carbon nanotube contaminated soil.

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    pub_type: 杂志文章


    authors: Cano AM,Kohl K,Deleon S,Payton P,Irin F,Saed M,Shah SA,Green MJ,Cañas-Carrell JE

    更新日期:2016-06-01 00:00:00

  • Biomarker responses and reproductive toxicity of the effluent from a Chinese large sewage treatment plant in Japanese medaka (Oryzias latipes).

    abstract::The present study was conducted to assess the potential toxicity of the effluent from a large sewage treatment plant (GBD-STP) in Beijing. Japanese medakas (Oryzias latipes) at reproduction active period were exposed to a serial of graded concentrations of the effluent or 100 ng l-1 of 17-alpha-ethinylestradiol (EE2, ...


    pub_type: 杂志文章


    authors: Ma T,Wan X,Huang Q,Wang Z,Liu J

    更新日期:2005-04-01 00:00:00

  • The flux and mass balance of PCDD/F in a MSW incineration full scale plant.

    abstract::PCDD/F are one of the most significant environmental concerns of municipal solid waste disposal through incineration processes. With the main purpose of evaluating their presence along the flue gas line and establishing a mass balance over the whole system, an extensive research study was performed on a full scale pla...


    pub_type: 杂志文章


    authors: Giugliano M,Cernuschi S,Grosso M,Aloigi E,Miglio R

    更新日期:2001-05-01 00:00:00

  • PCB congener selective biodegradation by the white rot fungus Pleurotus ostreatus in contaminated soil.

    abstract::Six strains of white rot fungi were tested for their biodegradation ability of low chlorinated polychlorinated biphenyl (PCB) commercial mixture (Delor 103) in real soil system. Phanerochaete chrysosporium and Trametes versicolor did not show any ability to degrade PCBs in soil. On the contrary, four strains of Pleuro...


    pub_type: 杂志文章


    authors: Kubátová A,Erbanová P,Eichlerová I,Homolka L,Nerud F,Sasek V

    更新日期:2001-04-01 00:00:00

  • Biosensor-controlled degradation of chlorpyrifos and chlorfenvinfos using a phosphotriesterase-based detoxification column.

    abstract::This works presents the development of a detoxification system based on bacterial phosphotriesterase (PTE) for the degradation of organophosphate (OP) insecticides in water. PTE was immobilised on an activated agarose gel via covalent coupling. Two different OPs were studied, chlorpyrifos and chlorfenvinfos, due to th...


    pub_type: 杂志文章


    authors: Istamboulie G,Durbiano R,Fournier D,Marty JL,Noguer T

    更新日期:2010-01-01 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

  • Influence of usage and chemical-physical properties on the atmospheric transport and deposition of pesticides to agricultural regions of Manitoba, Canada.

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    pub_type: 杂志文章


    authors: Messing P,Farenhorst A,Waite D,Sproull J

    更新日期:2013-02-01 00:00:00

  • Reproductive effects of tris(4-chlorophenyl)methanol in the rat.

    abstract::Tris(4-chlorophenyl)methanol (TCPM) is a global contaminant of unknown origin that is structurally related to the endocrine modulating pesticides 1,1,1-trichloro-2,2-bis(p-chlorophenyl)ethane (DDT) and Dicofol. Therefore, the potential reproductive toxic effects of TCPM were investigated in sexually mature male Spragu...


    pub_type: 杂志文章


    authors: Foster WG,Desaulniers D,Leingartner K,Wade MG,Poon R,Chu I

    更新日期:1999-08-01 00:00:00

  • Adsorption and inhibition of acetylcholinesterase by different nanoparticles.

    abstract::Manufactured nanoparticles can be toxic via interactions with proteins and enzymes. Acetylcholinesterase (AChE) is a key enzyme present in the brain, blood and nervous system. Therefore, adsorption and inhibition of AChE by eight nanoparticles, SiO(2), TiO(2), Al(2)O(3), Al, Cu, Cu-C (carbon-coated copper), multi-wall...


    pub_type: 杂志文章


    authors: Wang Z,Zhao J,Li F,Gao D,Xing B

    更新日期:2009-09-01 00:00:00

  • Application of different RP-HPLC methods for the determination of the octanol/water partition coefficient of selected tetrachlorobenzyltoluenes.

    abstract::Reversed-phase high-performance liquid chromatography (RP-HPLC) in both, isocratic and gradient elution mode (stationary phase: LiChrospher 100 RP-18; mobile phase: water/methanol or water/acetonitrile) was used for a renewed determination of octanol/water partition coefficients (Kow) of selected tetrachlorobenzyltolu...


    pub_type: 杂志文章


    authors: Paschke A,Manz M,Schüürmann G

    更新日期:2001-11-01 00:00:00

  • Interactions between mercury and dissolved organic matter--a review.

    abstract::Dissolved organic matter (DOM) interacts very strongly with mercury, affecting its speciation, solubility, mobility, and toxicity in the aquatic environment. Strong binding of mercury by DOM is attributed to coordination of mercury at reduced sulfur sites within the organic matter, which are present at concentrations ...


    pub_type: 杂志文章,评审


    authors: Ravichandran M

    更新日期:2004-04-01 00:00:00

  • Pyrolysis of permethrin and formation of precursors of polychlorinated dibenzo-p-dioxins and dibenzofurans (PCDD/F) under non-oxidative conditions.

    abstract::This article reports the computational and experimental results of the thermal decomposition of permethrin, a potential source of dibenzo-p-dioxins (PCDD) and polychlorinated dibenzofurans (PCDF). We have performed a quantum chemical analysis by applying density functional theory to obtain the decomposition pathways o...


    pub_type: 杂志文章


    authors: Altarawneh M,Carrizo D,Ziolkowski A,Kennedy EM,Dlugogorski BZ,Mackie JC

    更新日期:2009-03-01 00:00:00

  • Selective extraction of PAHs from a sediment with structural preservation of Natural Organic Matter.

    abstract::Selective extraction of Polycyclic Aromatic Hydrocarbons (PAH) without structural modification of the Natural Organic Matter (NOM) from a heavily contaminated sediment was investigated using various solvents mixtures. Structural modification of the NOM was monitored after extraction using 3D-fluorescence spectroscopy....


    pub_type: 杂志文章


    authors: Merdy P,Achard R,Samaali I,Lucas Y

    更新日期:2014-07-01 00:00:00

  • Lowered birth weight among infants born to women with a high intake of fish contaminated with persistent organochlorine compounds.

    abstract::In Sweden fatty fish from the Baltic Sea (at the Swedish east coast) constitute the main exposure route for persistent organochlorine compounds (POC). The present study assessed reproductive outcomes among fishermen's sisters from the Swedish east coast, who were shown to had had a relatively high consumption of conta...


    pub_type: 杂志文章


    authors: Rylander L,Strömberg U,Hagmar L

    更新日期:2000-05-01 00:00:00

  • Degradation of tetrabromobisphenol a by ozonation: Performance, products, mechanism and toxicity.

    abstract::This study systematically investigated the performance of ozonation on tetrabromobisphenol A (TBBPA) degradation under different ozone dosages (5.21-83.33 μmoL/L), initial solution pH (3.0-11.0) and temperatures (10-50 °C). At the same time, the generations of inorganic products (bromide ion and bromate) under differe...


    pub_type: 杂志文章


    authors: Han Q,Dong W,Wang H,Ma H,Liu P,Gu Y,Fan H,Song X

    更新日期:2019-11-01 00:00:00