Variations in dissolved organic nitrogen concentration in biofilters with different media during drinking water treatment.


:Dissolved organic nitrogen (DON) is potential precursor of disinfection byproducts (DBPs), especially nitrogenous DBPs. In this study, we investigated the impact of biofilters on DON concentration changes in a drinking water plant. A small pilot plant was constructed next to a sedimentation tank in a drinking water plant and included activated carbon, quartz sand, anthracite, and ceramsite biofilters. As the biofilter layer depth increased, the DON concentration first decreased and then increased, and the variation in DON concentration differed among the biofilters. In the activated carbon biofilter, the DON concentration was reduced by the largest amount in the first part of the column and increased by the largest amount in the second part of the column. The biomass in the activated carbon filter was less than that in the quartz sand filter in the upper column. The heterotrophic bacterial proportion among bacterial flora in the activated carbon biofilter was the largest, which might be due to the significant reduction in DON in the first part of the column. Overall, the results indicate that the DON concentration in biofiltered water can be controlled via the selection of appropriate biofilter media. We propose that a two-layer biofilter with activated carbon in the upper layer and another media type in the lower layer could best reduce the DON concentration.






Zhang H,Zhang K,Jin H,Gu L,Yu X




Has Abstract


2015-11-01 00:00:00












  • Reductive dehalogenation of tetrabromobisphenol-A by sediment from a contaminated ephemeral streambed and an enrichment culture.

    abstract::This study was aimed at improving our understanding of the physiology of the microorganisms that reductively dehalogenate tetrabromobisphenol-A (TBBPA). Activity was followed in contaminated sediments from a polluted streambed as well as from fracture filling material underlying the stream. Reductive dehalogenation wa...


    pub_type: 杂志文章


    authors: Arbeli Z,Ronen Z,Díaz-Báez MC

    更新日期:2006-08-01 00:00:00

  • Chemical composition of burnt smell caused by accidental fires: environmental contaminants.

    abstract::The chemical composition of the odors typical of fires has recently been deciphered. Basically the constituents are mixtures of acetophenone, benzyl alcohol, hydroxylated derivatives of benzaldehyde, methoxylated and/or alkylated phenols and naphthalene. This finding makes it possible to develop objective, practical a...


    pub_type: 杂志文章


    authors: Heitmann K,Wichmann H,Bahadir M,Gunschera J,Schulz N,Salthammer T

    更新日期:2011-01-01 00:00:00

  • Long-term stability of the Fe(III)-As(V) coprecipitates: Effects of neutralization mode and the addition of Fe(II) on arsenic retention.

    abstract::The coprecipitation of arsenic with Fe(III) by lime neutralization is widely used in industrial practices to treat arsenic-containing waste waters generated from mineral processing operations. In this work, coprecipitation was conducted directly at pH 8 to simulate the operations in hydrometallurgical practices, which...


    pub_type: 杂志文章


    authors: Zhang D,Wang S,Gomez MA,Wang Y,Jia Y

    更新日期:2019-12-01 00:00:00

  • Selenium volatilization in vegetated agricultural drainage sediment from the San Luis Drain, Central California.

    abstract::The presence of large amounts of Se-laden agricultural drainage sediment in the San Luis Drain, Central California, poses a serious toxic threat to wildlife in the surrounding environment. Effective management of the drainage sediment becomes a practical challenge because the sediment is polluted with high levels of S...


    pub_type: 杂志文章


    authors: Bañuelos GS,Lin ZQ,Arroyo I,Terry N

    更新日期:2005-09-01 00:00:00

  • Reduction of the phenolic components in olive-mill wastewater by an enzymatic treatment and its impact on durum wheat (Triticum durum Desf.) germinability.

    abstract::Olive-mill wastewater (OMW), an effluent of olive oil extraction process, is annually produced in huge amounts in olive growing areas. An interesting option for its disposal is the spreading on agricultural land, provided that phytotoxic effects are neutralized. The objective of the present investigation was to evalua...


    pub_type: 杂志文章


    authors: Casa R,D'Annibale A,Pieruccetti F,Stazi SR,Giovannozzi Sermanni G,Lo Cascio B

    更新日期:2003-03-01 00:00:00

  • Progress in modifications of 3D graphene-based adsorbents for environmental applications.

    abstract::3D graphene-based materials are promising adsorbents for environmental applications. Furthermore, increasing attention has been paid to the improvement of 3D graphene adsorbents for removing pollutants. In this article, the progress in the modification of 3D graphene materials and their performance for removing pollut...


    pub_type: 杂志文章,评审


    authors: Lin Y,Tian Y,Sun H,Hagio T

    更新日期:2020-12-29 00:00:00

  • Degradation of the textile dyes Basic yellow 28 and Reactive black 5 using diamond and metal alloys electrodes.

    abstract::Basic yellow 28 (SLY) and Reactive black 5 (CBWB), which are respectively methine and sulfoazo textile dyes were individually exposed to electrochemical treatment using diamond-, aluminium-, copper- and iron-zinc alloy electrodes. The generated current was registered with time during electrolysis of the dye solutions ...


    pub_type: 杂志文章


    authors: Cerón-Rivera M,Dávila-Jiménez MM,Elizalde-González MP

    更新日期:2004-04-01 00:00:00

  • A metabolomics study: CdTe/ZnS quantum dots induce polarization in mice microglia.

    abstract::In this study, a metabolomic analysis was used to reveal the neurotoxicity of the CdTe/ZnS QDs via microglia polarization. A gas chromatography-mass spectrometer (GC-MS) was applied to uncover the metabonomic changes in microglia (BV-2 cell line) after exposure to 1.25 μM CdTe/ZnS QDs. 11 annotated metabolic pathways ...


    pub_type: 杂志文章


    authors: He K,Liang X,Wei T,Liu N,Wang Y,Zou L,Bai C,Yao Y,Wu T,Kong L,Zhang T,Xue Y,Tang M

    更新日期:2020-05-01 00:00:00

  • Precipitation of carbonates by Nesterenkonia halobia in liquid media.

    abstract::We investigated the precipitation of carbonates by Nesterenkonia halobia in a liquid medium at different concentrations of salts and incubation times. N. halobia only produced crystals at salt concentrations of 2.5%, 7.5% and 15%. At 20% salt concentration no crystal formation was observed. Calcite, aragonite and dolo...


    pub_type: 杂志文章


    authors: Rivadeneyra MA,Delgado G,Soriano M,Ramos-Cormenzana A,Delgado R

    更新日期:2000-08-01 00:00:00

  • Stereoselective quantitation of haloxyfop in environment samples and enantioselective degradation in soils.

    abstract::The chiral separation of haloxyfop enantiomers was first performed on (R, R) Whelk-O1 chiral column (pirkle type) by high-performance liquid chromatography (HPLC). Chromatographic conditions such as mobile phase composition and column temperature were optimized, and the best resolution was obtained using hexane/n-prop...


    pub_type: 杂志文章


    authors: Sun M,Liu D,Shen Z,Zhou Z,Wang P

    更新日期:2015-01-01 00:00:00

  • The role of arbuscular mycorrhiza in zinc uptake by red clover growing in a calcareous soil spiked with various quantities of zinc.

    abstract::Three pot experiments were conducted to investigate the role of arbuscular mycorrhiza (AM) in Zn uptake by red clover. Plants inoculated with Glomus mosseae and uninoculated controls were grown in a sterile calcareous soil in 'Plexiglas' (Acrylic) containers with two nylon net partitions (30 microm mesh) to separate t...


    pub_type: 杂志文章


    authors: Chen BD,Li XL,Tao HQ,Christie P,Wong MH

    更新日期:2003-02-01 00:00:00

  • Gross alpha and beta activities in tap waters in Eastern Black Sea region of Turkey.

    abstract::Gross alpha and gross beta activities were determined for 27 different tap water samples collected from Eastern Black Sea region of Turkey. The instrumentation used to count the gross alpha and gross beta activities was a alpha/beta counter of the low background multiple detector type with 10 sample detectors (Berthol...


    pub_type: 杂志文章


    authors: Damla N,Cevik U,Karahan G,Kobya AI

    更新日期:2006-02-01 00:00:00

  • Tropospheric degradation of 2-fluoropropene (CH3CFCH2) initiated by hydroxyl radical: Reaction mechanisms, kinetics and atmospheric implications from DFT study.

    abstract::Degradation of hydrofluoro-olefins (HFOs) with oxidants plays a significant role in the troposphere. Thus, we have investigated detail theoretical calculations of hydroxyl radical (•OH) initiated oxidation of 2-fluoropropene (CH3CFCH2) using M06-2X/6-311++G(d,p) level of theory. Here, we have considered different poss...


    pub_type: 杂志文章


    authors: Gour NK,Borthakur K,Paul S,Chandra Deka R

    更新日期:2020-01-01 00:00:00

  • Carbon isotope fractionation during dechlorination of 1,2,3,4-tetrachlorodibenzo-p-dioxin by a Dehalococcoides-containing culture.

    abstract::Carbon isotope fractionation was observed during dechlorination of 1,2,3,4-tetrachlorodibenzo-p-dioxin (1,2,3,4-TeCDD) by a mixed culture containing Dehalococcoides ethenogenes strain 195. Fractionation was examined when 1,2,3,4-TeCDD was added as the only chlorinated compound and when 1,2,3,4-TeCDD was added with a k...


    pub_type: 杂志文章


    authors: Liu F,Cichocka D,Nijenhuis I,Richnow HH,Fennell DE

    更新日期:2010-08-01 00:00:00

  • Fitness cost of imidacloprid resistance in the cotton-staining bug, Dysdercus koenigii.

    abstract::Dysdercus koenigii, a serious cotton-staining insect pest in many countries, has shown high resistance to imidacloprid, a systemic neonicotinoid insecticide used to control sap-sucking pests. With the aim of creating an effective management strategy, the biological traits of susceptible (SS) and imidacloprid-resistant...


    pub_type: 杂志文章


    authors: Saeed R,Abbas N,Hafez AM

    更新日期:2021-02-01 00:00:00

  • Removal of chlorinated organic solvents from hydraulic fracturing wastewater by bare and entrapped nanoscale zero-valent iron.

    abstract::With the increasing application of hydraulic fracturing, it is urgent to develop an effective and economically feasible method to treat the large volumes of fracturing wastewater. In this study, bare and entrapped nanoscale zero-valent iron (nZVI) were introduced for the removal of carbon tetrachloride (CT) and 1,1,2-...


    pub_type: 杂志文章


    authors: Lei C,Sun Y,Khan E,Chen SS,Tsang DCW,Graham NJD,Ok YS,Yang X,Lin D,Feng Y,Li XD

    更新日期:2018-04-01 00:00:00

  • A preliminary risk assessment of trace elements accumulated in fish to the Indo-Pacific Humpback dolphin (Sousa chinensis) in the northwestern waters of Hong Kong.

    abstract::In order to assess the potential risks associated with consumption of contaminated prey items to the Indo-Pacific Humpback dolphin (Sousa chinensis), fish species (Collichthys lucida, Pseudosciaena crocea, Johnius sp., Thryssa sp., Mugil sp. and Trichiurus sp.) representing the main food items of the dolphin were coll...


    pub_type: 杂志文章


    authors: Hung CL,So MK,Connell DW,Fung CN,Lam MH,Nicholson S,Richardson BJ,Lam PK

    更新日期:2004-08-01 00:00:00

  • Biodegradation of slop oil by endophytic Bacillus cereus EN18 coupled with lipase from Rhizomucor miehei (Palatase®).

    abstract::Removal of slop oil, a by-product of oil refining, also obtained in cleaning up of oil tanks and filters is a difficult issue. High content of hydrocarbons (C3-C40) and other organic compounds makes this waste difficult to eliminate from the environment. The purpose of this investigation was to combine bacterial degra...


    pub_type: 杂志文章


    authors: Marchut-Mikolajczyk O,Drożdżyński P,Struszczyk-Świta K

    更新日期:2020-07-01 00:00:00

  • Development of supercritical carbon dioxide extraction with a solid phase trap for dioxins in soils and sediments.

    abstract::A method involving supercritical fluid extraction (SFE) with a solid phase trap containing activated alumina was investigated for the rapid analysis of polychlorinated dibenzo-p-dioxins (PCDDs), polychlorinated dibenzofurans (PCDFs), and dioxin like polychlorinated biphenyls (DL-PCBs) in soils and sediments. The sampl...


    pub_type: 杂志文章


    authors: Miyawaki T,Kawashima A,Honda K

    更新日期:2008-01-01 00:00:00

  • Lepidopteran insect susceptibility to silver nanoparticles and measurement of changes in their growth, development and physiology.

    abstract::Increased use of nanomaterials in various fields of science has lead for the need to study the impact of nanomaterial on the environment in general and on insect and plant life in particular. We studied the impact of silver nanoparticles (AgNPs) on growth and feeding responses of two lepidopteran pests of castor plant...


    pub_type: 杂志文章


    authors: Yasur J,Rani PU

    更新日期:2015-04-01 00:00:00

  • Adsorption and attenuation behavior of 3-nitro-1,2,4-triazol-5-one (NTO) in eleven soils.

    abstract::NTO (3-nitro-1,2,4-triazol-5-one) is one of the new explosive compounds used in insensitive munitions (IM) developed to replace traditional explosives, TNT and RDX. Data on NTO fate and transport is needed to determine its environmental behavior and potential for groundwater contamination. We conducted a series of kin...


    pub_type: 杂志文章


    authors: Mark N,Arthur J,Dontsova K,Brusseau M,Taylor S

    更新日期:2016-02-01 00:00:00

  • A scheme to scientifically and accurately assess cadmium pollution of river sediments, through consideration of bioavailability when assessing ecological risk.

    abstract::Evaluating heavy metal pollution status and ecological risk in river sediments is a complex task, requiring consideration of contaminant pollution levels, as well as effects of biological processes within the river system. There are currently no simple or low-cost approaches to heavy metal assessment in river sediment...


    pub_type: 杂志文章


    authors: Song Z,Tang W,Shan B

    更新日期:2017-10-01 00:00:00

  • Side effects of two citrus essential oil formulations on a generalist insect predator, plant and soil enzymatic activities.

    abstract::The widespread use of chemical pesticides for crop protection, despite having contributed to ensure food security, have shown to exert negative impacts on the environment and on human health. In addition, the frequent emergence of resistance to pesticides and their adverse effects toward non-target organisms have gene...


    pub_type: 杂志文章


    authors: Campolo O,Puglisi I,Barbagallo RN,Cherif A,Ricupero M,Biondi A,Palmeri V,Baglieri A,Zappalà L

    更新日期:2020-10-01 00:00:00

  • In vivo visual evaluation of nanoparticle transfer in a three-species terrestrial food chain.

    abstract::Nanoparticles (NPs) are increasingly being used, and they present the risk of being introduced into food webs. Numerous studies have been conducted to evaluate the toxicological effects of NPs in the aquatic and freshwater environments and their transfer to upper-level trophic organisms. However, information on the tr...


    pub_type: 杂志文章


    authors: Chae Y,Kim SW,An YJ

    更新日期:2016-05-01 00:00:00

  • Interpretation of heavy metal data from mussel by use of multivariate classification techniques.

    abstract::Different strategies of multivariate analysis of metals concentrations (Mn, Fe, Ni, V, Co, Cu, Cd, Hg, Pb, Na, K) in mussel samples from different spanish markets are used to interpret a data base and identify differences between species and origin of the samples. Principal Component Analysis and Potential curves are ...


    pub_type: 杂志文章


    authors: Machado Mesa L,Peña Méndez E,Sánchez Sánchez M,García Montelongo F

    更新日期:1999-02-01 00:00:00

  • Application of excitation and emission matrix fluorescence (EEM) and UV-vis absorption to monitor the characteristics of Alizarin Red S (ARS) during electro-Fenton degradation process.

    abstract::Oxidative degradation of Alizarin Red S (ARS) in aqueous solutions by using electro-Fenton was studied. At first, effect of operating parameters such as current density, aeration rate and initial pH on the degradation of ARS were studied by using UV-vis spectrum, respectively. Then, under the optimal operating conditi...


    pub_type: 杂志文章


    authors: Lai B,Zhou Y,Wang J,Yang Z,Chen Z

    更新日期:2013-11-01 00:00:00

  • Developmental programming: Prenatal bisphenol A treatment disrupts mediators of placental function in sheep.

    abstract::Gestational Bisphenol A (BPA) exposure is associated with low birth weight. We hypothesized that the low birth weight is the consequence of reduced placental efficiency and a function of BPA-induced inflammatory, oxidative, lipotoxic, angiogenic, steroidal and fibrotic changes involving epigenetic alterations. Placent...


    pub_type: 杂志文章


    authors: Song W,Puttabyatappa M,Zeng L,Vazquez D,Pennathur S,Padmanabhan V

    更新日期:2020-03-01 00:00:00

  • Chemical stabilization of chromate in blast furnace slag mixed cementitious materials.

    abstract::Cement waste form (CWF) technology is among the leading approaches to disposing of metals and liquid low-level nuclear waste in the United States. One such material, saltstone, includes slag, fly ash and Portland cement to enhance the immobilization of contaminants (e.g., Cr, (99)Tc) in alkaline liquid wastes. To eval...


    pub_type: 杂志文章


    authors: Meena AH,Kaplan DI,Powell BA,Arai Y

    更新日期:2015-11-01 00:00:00

  • Effects of cylindrospermopsin on cultured immortalized human airway epithelial cells.

    abstract::Anthropogenic eutrophication of freshwater bodies increases the occurrence of toxic cyanobacterial blooms. The cyanobacterial toxin cylindrospermopsin (CYN) is detected in the environment with increasing frequency, driving the scientific effort to assess emerging health risks from CYN-producing blooms. Oral exposure t...


    pub_type: 杂志文章


    authors: Kubickova B,Laboha P,Hildebrandt JP,Hilscherová K,Babica P

    更新日期:2019-04-01 00:00:00

  • Altitude dependence of polychlorinated biphenyls (PCBs) and polybrominated diphenyl ethers (PBDEs) in surface soil from Tibetan Plateau, China.

    abstract::Remote mountain areas besides high latitude regions are beginning to receive increased attention in studying the transport and behavior of persistent organic pollutants (POPs). In the present work, surface soil samples were collected from the Tibetan Plateau, the highest plateau in the world which includes the norther...


    pub_type: 杂志文章


    authors: Wang P,Zhang Q,Wang Y,Wang T,Li X,Li Y,Ding L,Jiang G

    更新日期:2009-09-01 00:00:00