Bioaccumulation and morphological traits in a multi-generation test with two Daphnia species exposed to lead.


:Anthropic pressure negatively affects natural environments. Lead (Pb) is a non-essential highly toxic metal that is present in aquatic ecosystems. Two daphnid species from two different latitudes, the temperate Daphnia magna and the tropical Daphnia similis were used as test-organisms to evaluate a long-term Pb exposure. Both species were exposed for nine generations to a chronic concentration of Pb (50 μg/L) and the effects were explored, considering some endpoints not commonly used in toxicity tests: body burden of Pb and presence of granules in the dorsal region of neonates, hemoglobin contents, carapace deformation and morphology, production of males and ephippia (or dormant haploid egg), changes in the eggs' colour and eggs abortion. This multi-generation test was conducted under two food regimes, the usual (3 × 105 cells/mL) and the restricted (1.5 × 105 cells/mL) regime. On generation F6, Pb acclimated neonates were changed to a clean media for three generations, to evaluate exposure retrieval (recovery period). Negative and adverse effects occurred through generations, but no disparity was shown between D. magna and D. similis. The D. magna Pb accumulation showed different patterns regarding food regime. Bioaccumulation was faster under usual food, rapidly reaching a saturation point, whereas a gradual increase occurred under food restriction. A successful retrieval happened regarding Pb in D. magna, since no difference between control and recovering organisms was evidenced regarding their Pb body burdens. Generational Pb exposure led to carapace malformations, Pb aggregation in neonates' dorsal region, reddish extremities, production of males, ephippia (or dormant haploid egg), and aborted eggs, and changes in the eggs' colour (green and white). Food restriction also induced the production of males. Reddish extremities disappeared in recovering organisms and ephippia (or dormant haploid egg) did not occurred during the recovery period. Existent males revealed a shorter lifespan than females (under stress). D. magna and D. similis presented similar responses, for the endpoints analysed; however, it does not mean that this lack of sensitivity difference will be observed when other endpoints (e.g. survival, reproduction) are considered. Bioaccumulation of Pb and adverse effects occurred at the tested concentration of 50μg/L, although higher Pb levels are allowed in the environment as safe concentrations, as reported by the Brazilian legislation and the literature where effects are evidences above 400 μg/L of Pb. Pb effects on reproduction, respiration, malformation, and other adverse effects suggest that a chronic generational exposure can be harmful to both D. magna and D. similis, and that such chronic contaminated environments should not be disregarded when it comes to environmental monitoring.






Araujo GS,Pavlaki MD,Soares AMVM,Abessa DMS,Loureiro S




Has Abstract


2019-03-01 00:00:00












  • Seasonal variations of monoterpene emissions from Pinus densiflora in East Asia.

    abstract::The emission rates and compositions of monoterpene from Pinus densiflora were investigated in the Gumsung (GM) and Worak (WM) mountains. The standard emission rates (ERs: ERs is the monoterpene emission rate at standard temperature, 30 degrees C) from P. densiflora ranged from 0.817 to 1.704 (microgC/gdw-h). The ERs a...


    pub_type: 杂志文章


    authors: Lim JH,Kim JC,Kim KJ,Son YS,Sunwoo Y,Han JS

    更新日期:2008-09-01 00:00:00

  • Evaluating contamination of dredges and disposal criteria in Greek coastal areas.

    abstract::Sediments were collected from areas that were going to be dredged located at six small Greek ports, as well as from possible disposal areas. In order to assess the contamination level of dredged material, the samples were analysed for pH, organic matter, the metals Cd, Pb, Hg, Cr, Ni, Cu, Zn and major organic compound...


    pub_type: 杂志文章


    authors: Leotsinidis M,Sazakli E

    更新日期:2008-06-01 00:00:00

  • Mo0 and Mo4+ bimetallic reactive sites accelerating Fe2+/Fe3+ cycling for the activation of peroxymonosulfate with significantly improved remediation of aromatic pollutants.

    abstract::In Fe2+/peroxymonosulfate (PMS) activation system, the slow cycle rate of Fe3+/Fe2+ has been considered to be the limiting step in the remediation of organic contaminants. In this paper, commercial molybdenum (Mo) powder is employed as the cocatalyst in Fe2+/PMS system, which can significantly accelerate the Fe3+/Fe2+...


    pub_type: 杂志文章


    authors: Yi Q,Liu W,Tan J,Yang B,Xing M,Zhang J

    更新日期:2020-04-01 00:00:00

  • Removal of methyl parathion from water by electrochemically generated Fenton's reagent.

    abstract::The electro-Fenton process was used to assess the degradation of methyl parathion (MP) in aqueous solutions. This oxidation process allows the production of hydroxyls radicals which react on the organic compounds, leading to their mineralization. Degradation experiments were performed either in perchloric, sulphuric, ...


    pub_type: 杂志文章


    authors: Diagne M,Oturan N,Oturan MA

    更新日期:2007-01-01 00:00:00

  • Illicit drugs as new environmental pollutants: cyto-genotoxic effects of cocaine on the biological model Dreissena polymorpha.

    abstract::The increase in global consumption of illicit drugs has produced not only social and medical problems but also a potential new environmental danger. Indeed, it has been established that drugs consumed by humans end up in surface waters, after being carried through the sewage system. Although many studies to measure co...


    pub_type: 杂志文章


    authors: Binelli A,Pedriali A,Riva C,Parolini M

    更新日期:2012-03-01 00:00:00

  • Distribution of polybrominated diphenyl ethers in breast milk from North China: implication of exposure pathways.

    abstract::The breast milk concentrations of polybrominated diphenyl ethers (PBDEs; sum of eight congeners: BDE-28, 47, 99, 100, 153, 154, 183 and 209) were determined (by high resolution gas chromatographic high resolution mass spectrometry) in samples from primiparous women collected in 2006 in Tianjin, China. Dietary and life...


    pub_type: 杂志文章


    authors: Zhu L,Ma B,Li J,Wu Y,Gong J

    更新日期:2009-03-01 00:00:00

  • Elevated atmospheric CO2 might increase the health risk of long-term ingestion of leafy vegetables cultivated in residual DDT polluted soil.

    abstract::Residual dichlorodiphenyltrichloroethane (DDT) in the environment and a continuously increasing atmospheric carbon dioxide (CO2) concentration are two issues that have received a lot of attention. This study was conducted using a pot experiment to investigate the interactive effects of elevated CO2 and DDT on the upta...


    pub_type: 杂志文章


    authors: Wu XR,Li YP,Tu SX,Ding YZ,Wang RG,Rensing C,Feng RW

    更新日期:2019-07-01 00:00:00

  • Atrazine promotes biochemical changes and DNA damage in a Neotropical fish species.

    abstract::The effects of Atrazine, an herbicide used worldwide and considered as a potential contaminant in aquatic environments, were assessed on the Neotropical fish Prochilodus lineatus acutely (24 and 48 h) exposed to 2 or 10 μg L(-1) of atrazine by using a set of biochemical and genetic biomarkers. The following parameters...


    pub_type: 杂志文章


    authors: Santos TG,Martinez CB

    更新日期:2012-11-01 00:00:00

  • Dynamic-chemical coupling of the upper troposphere and lower stratosphere region.

    abstract::The importance of the interaction between chemistry and dynamics in the upper troposphere and lower stratosphere for chemical species like ozone is investigated using two chemistry-climate models and a Lagrangian trajectory model. Air parcels from the upper troposphere, i.e. regions of lightning and aircraft emissions...


    pub_type: 杂志文章


    authors: Grewe V,Reithmeier C,Shindell DT

    更新日期:2002-06-01 00:00:00

  • Occurrence and fate of the human pharmaceutical metabolite ritalinic acid in the aquatic system.

    abstract::To investigate the occurrence and fate of ritalinic acid - the main human metabolite of the psychostimulant drug methylphenidate - in the aquatic environment, a HPLC-electrospray-MS/MS method for the quantification of ritalinic acid in wastewater, surface water and bank filtrate was developed. Carbamazepine known as v...


    pub_type: 杂志文章


    authors: Letzel M,Weiss K,Schüssler W,Sengl M

    更新日期:2010-12-01 00:00:00

  • Potential effects of internal physio-ecological changes on the online biomonitoring of water quality: The behavior responses with circadian rhythms of zebrafish (Danio rerio) to different chemicals.

    abstract::The online biomonitoring of aquatic accidental pollution is very important to realize the assessment of complex toxicity. However, the monitoring results would be affected greatly by the internal physio-ecological changes of test organisms, and circadian rhythms might contribute greatly to this kind of effects. In the...


    pub_type: 杂志文章


    authors: Zhao R,Hu Y,Li B,Chen M,Ren Z

    更新日期:2020-01-01 00:00:00

  • Organochlorine pesticides and heavy metals in fish from Lake Awassa, Ethiopia: Insights from stable isotope analysis.

    abstract::The levels and bioaccumulation of organochlorine pesticides (OCPs) and heavy metals were studied in muscle and liver of three fish species, with two trophic levels, from Lake Awassa, Ethiopia. DDTs were the predominant organic pollutant in all species with a maximum level of 73.28 ng g(-1) wet weight (ww). p,p'-DDE wa...


    pub_type: 杂志文章


    authors: Yohannes YB,Ikenaka Y,Nakayama SM,Saengtienchai A,Watanabe K,Ishizuka M

    更新日期:2013-05-01 00:00:00

  • Lead isotope ratio measurements as indicators for the source of lead poisoning in Mute swans (Cygnus olor) wintering in Puck Bay (northern Poland).

    abstract::Lead (Pb) poisoning is most commonly linked amongst anthropogenically-caused deaths in waterfowl and this is often associated with hunting and fishing activities. However, the exact identification of the source may be difficult with commonly-used techniques. We have studied isotope ratios using Inductively-Coupled Pla...


    pub_type: 杂志文章


    authors: Binkowski ŁJ,Meissner W,Trzeciak M,Izevbekhai K,Barker J

    更新日期:2016-12-01 00:00:00

  • Bioconcentration and metabolism of ketoconazole and effects on multi-biomarkers in crucian carp (Carassius auratus).

    abstract::The tissue distribution, bioconcentration, metabolism and biological effects of the antifungal medication ketoconazole were investigated in fish, crucian carp (Carassius auratus) were exposed to a series of nominal concentrations (0.2, 2 and 20 μg/L) for 14 days. The ultra-high performance liquid chromatography tandem...


    pub_type: 杂志文章


    authors: Liu J,Lu G,Yang H,Yan Z,Wang Y,Wang P

    更新日期:2016-05-01 00:00:00

  • The effects of biochars from rice residue on the formation of iron plaque and the accumulation of Cd, Zn, Pb, As in rice (Oryza sativa L.) seedlings.

    abstract::A historically multi-metal contaminated soil was amended with biochars produced from different parts of rice plants (straw, husk and bran) to investigate how biochar can influence the mobility of Cd, Zn, Pb and As in rice seedlings (Oryza sativa L.). Rice shoot concentrations of Cd, Zn and Pb decreased by up to 98%, 8...


    pub_type: 杂志文章


    authors: Zheng RL,Cai C,Liang JH,Huang Q,Chen Z,Huang YZ,Arp HP,Sun GX

    更新日期:2012-10-01 00:00:00

  • Phytotoxicity and phytoremediation of 2,6-dinitrotoluene using a model plant, Arabidopsis thaliana.

    abstract::Biochemical and genetic studies of xenobiotic metabolism in the model plant Arabidopsis have significant potential in providing information for phytoremediation. This paper presents the toxicity of 2,6-dinitrotoluene (2,6-DNT) to Arabidopsis under axenic conditions, the fate and transformation of 2,6-DNT after uptake ...


    pub_type: 杂志文章


    authors: Yoon JM,Oliver DJ,Shanks JV

    更新日期:2007-06-01 00:00:00

  • Review and recommendations on criteria to evaluate the relevance of pesticide interaction data for ecological risk assessments.

    abstract::Mixing pesticides with different modes of action can provide a wider spectrum of control with fewer applications compared to using single active ingredients and is essential for comprehensive management of pest resistance. Mixture studies with pesticides are performed to assess compatibility, combined efficacy, and po...


    pub_type: 杂志文章,评审


    authors: Levine SL,Borgert CJ

    更新日期:2018-10-01 00:00:00

  • Photodegradation of quinestrol in waters and the transformation products by UV irradiation.

    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...


    pub_type: 杂志文章


    authors: Tang T,Qian K,Shi T,Wang F,Li P,Li J,Cao Y

    更新日期:2012-11-01 00:00:00

  • Assessment on the effects of aluminum-modified clay in inactivating internal phosphorus in deep eutrophic reservoirs.

    abstract::Aluminum-salt inactivating agents are extensively applied to the restoration of lakes polluted by internal phosphorus (hereinafter referred to as "P"). However, there is a lack of micromechanism information regarding the sediment P cycle and its interactions with aluminum salts, which has restricted the engineering ap...


    pub_type: 杂志文章


    authors: Wang J,Chen J,Chen Q,Yang H,Zeng Y,Yu P,Jin Z

    更新日期:2019-01-01 00:00:00

  • Assessment of potentially toxic metal contamination in the soils of a legacy mine site in Central Victoria, Australia.

    abstract::The environmental impact of toxic metal contamination from legacy mining activities, many of which had operated and were closed prior to the enforcement of robust environmental legislation, is of growing concern to modern society. We have carried out analysis of As and potentially toxic metals (Cd, Co, Cr, Cu, Hg, Mn,...


    pub_type: 杂志文章


    authors: Abraham J,Dowling K,Florentine S

    更新日期:2018-02-01 00:00:00

  • Biomarkers of oxidative stress and health risk assessment of heavy metal contaminated aquatic and terrestrial organisms by oil extraction industry in Ogale, Nigeria.

    abstract::Ogale community in Rivers State, Nigeria is characterized by crude-oil contamination of its land resources. The present study aimed to evaluate the health risk and metal (Cd, Pb, Zn, Cr, and Ni) contamination level of the vegetable (Telfairia occidentalis), snail (Achatina achatina) and the catfish (Clarias gariepinus...


    pub_type: 杂志文章


    authors: Abarikwu SO,Essien EB,Iyede OO,John K,Mgbudom-Okah C

    更新日期:2017-10-01 00:00:00

  • Recovery of EDTA from soil-washing wastewater with calcium-hydroxide-enhanced sulfide precipitation.

    abstract::It is cost effective and thermodynamically feasible to recover EDTA and remove potential toxic elements (PTEs) with sulfide precipitation from soil-washing wastewater produced from EDTA washing PTEs-contaminated soil. However, poor solid-liquid separation and EDTA recovery restrict its application due to a large numbe...


    pub_type: 杂志文章


    authors: Wang Q,Chen J

    更新日期:2019-12-01 00:00:00

  • Determination of PM2.5 sources using time-resolved integrated source and receptor models.

    abstract::Multivariate statistical techniques are applied to particulate matter (PM) and meteorological data to identify the sources responsible for evening PM spikes at Sunland Park, NM (USA). The statistical techniques applied are principal components analysis (PCA), redundancy analysis (RDA), and absolute principal component...


    pub_type: 杂志文章


    authors: García JH,Li WW,Cárdenas N,Arimoto R,Walton J,Trujillo D

    更新日期:2006-12-01 00:00:00

  • Competition in chromate adsorption onto micro-sized granular ferric hydroxide.

    abstract::Hexavalent chromium is highly toxic and elaborate technology is necessary for ensured removal during drinking water production. The present study aimed at estimating the potential of a micro-sized iron hydroxide (μGFH] adsorbent for chromate removal in competition to ions presents in drinking water. Freundlich and Lan...


    pub_type: 杂志文章


    authors: Hilbrandt I,Ruhl AS,Zietzschmann F,Molkenthin M,Jekel M

    更新日期:2019-03-01 00:00:00

  • Specific issues in health risk assessment of endocrine disrupting chemicals and international activities.

    abstract::Specific issues in health risk assessment of EDCs and correlated international activities thereof are discussed. Risk characterization is a synthesis of all information including hazard assessment, dose-response relationship, and exposure information to identify clearly the strengths and weaknesses of the database, th...


    pub_type: 杂志文章,评审


    authors: Younes M

    更新日期:1999-10-01 00:00:00

  • Pesticides in aquatic environments and their removal by adsorption methods.

    abstract::Although pesticides are widely used in agriculture, industry and households, they pose a risk to human health and ecosystems. Based on target organisms, the main types of pesticides are herbicides, insecticides and fungicides, of which herbicides accounted for 46% of the total pesticide usage worldwide. The movement o...


    pub_type: 杂志文章


    authors: Mojiri A,Zhou JL,Robinson B,Ohashi A,Ozaki N,Kindaichi T,Farraji H,Vakili M

    更新日期:2020-08-01 00:00:00

  • Influence of structural Al species on Cd(II) capture by iron muscovite nanoparticles.

    abstract::The isomorphous substitution in the structure of phyllosilicate minerals plays an important role in regulating of surface chemical properties. In this work, iron muscovite nanoparticles with various Al species were successfully prepared to explore the structural Fe and Al species on the capture of Cd(II) from solution...


    pub_type: 杂志文章


    authors: Wu C,Wei X,Liu P,Tan J,Liao C,Wang H,Yin L,Zhou W,Cui HJ

    更新日期:2019-07-01 00:00:00

  • Effects of pyriproxyfen on zebrafish brain mitochondria and acetylcholinesterase.

    abstract::Pyriproxyfen is an insecticide used worldwide that acts as a biomimetic of juvenile hormone. This study investigated metabolic and synaptic impairments triggered by pyriproxyfen using zebrafish acetylcholinesterase (zbAChE) and mitochondria as markers. A brain zbAChE assay was performed in vitro and in vivo covering a...


    pub_type: 杂志文章


    authors: Azevedo RDS,Falcão KVG,Assis CRD,Martins RMG,Araújo MC,Yogui GT,Neves JL,Seabra GM,Maia MBS,Amaral IPG,Leite ACR,Bezerra RS

    更新日期:2021-01-01 00:00:00

  • Mechanochemical destruction of Dechlorane Plus with calcium oxide.

    abstract::Dechlorane Plus (DP) was co-ground with calcium oxide (CaO) powder in a planetary ball mill at room temperature. A mechanochemical reaction was induced, resulting in the decomposition of DP through dechlorination. The influences of both the charge ratio and content of CaO were investigated. The co-ground samples were ...


    pub_type: 杂志文章


    authors: Zhang W,Huang J,Yu G,Deng S,Zhu W

    更新日期:2010-09-01 00:00:00

  • Biosorption of diethyl phthalate ester by living and nonliving Burkholderia cepacia and the role of its cell surface components.

    abstract::In this study, the dibutyl phthalate (DBP) binding properties of a DBP-tolerant bacterium (B. cepacia) were characterized in terms of adsorption kinetics and isotherm. Living and nonliving cells both exhibited rapid removal of DBP, achieving more than 80% of maximum sorption within 30 min of contact and reached the eq...


    pub_type: 杂志文章


    authors: Luo S,Li L,Chen A,Zeng Q,Xia H,Gu JD

    更新日期:2017-07-01 00:00:00