Abstract:
:Heterotrophic denitrifiers, capable of simultaneous nitrate reduction and Fe(II) oxidation, can be applied for the remediation of nitrate and Fe(II) combined contamination in groundwater. Under strictly anaerobic condition, denitrifying microbial communities were enriched with the coexistence of soluble nitrate, Fe(II) and associated nutrient elements to monitor the denitrification process. Low abundance of Fe(II) (e.g., 10 mg L-1 in this study) tended to stimulate the activity of denitrifying microbial communities. However, elevated Fe(II) concentration (50 and 100 mg L-1 in this study), acted as a stress, strongly inhibited the activity and reproduction of denitrifiers. Besides, through thermodynamics calculations, methanol rather than Fe(II) was proved to be the preferable electron donors for both energy metabolism and anabolism. Betaproteobacteria was found to be the most predominant (sub)phylum in all enriched microbial assemblages. Methylovesartilis was the most predominant group mainly catalyzed for methanol based denitrification, and others denitrifiers included Methylophilaceae, Dechloromonas and Denitratisoma. Excessive Fe(II) in the solution greatly reduced the proportions of these denitrifying groups, while the influence seemed to be less apparent on functional genes composition. As such, a conceptional metabolism pathway of the most dominant genus (i.e., Methylovesartilis) for nitrate reducing as well as methanol and Fe(II) oxidation confirmed that biotic nitrate reducing and Fe(II) oxidizing were potentially proceeded in cytoplasm by enzymes such as NarGHI. The Fe(II) oxidation rate depended on the rate of Fe(II) entering into the cell. These findings provide a clear mechanistic understanding of heterotrophic denitrification coupling with Fe(II) oxidation, and environmental implication for the bioremediation of nitrate and Fe(II) contaminated groundwater.
journal_name
Ecotoxicol Environ Safjournal_title
Ecotoxicology and environmental safetyauthors
Liu Y,Feng C,Sheng Y,Dong S,Chen N,Hao Cdoi
10.1016/j.ecoenv.2018.09.104subject
Has Abstractpub_date
2018-12-30 00:00:00pages
437-445eissn
0147-6513issn
1090-2414pii
S0147-6513(18)30975-8journal_volume
166pub_type
杂志文章abstract::Global warming has become an important research topic in different disciplines around the world, especially in the fields of environment quality and food security. As a potential problem in soil environments, cadmium (Cd) contamination of rice under global warming conditions has not been thoroughly investigated. In th...
journal_title:Ecotoxicology and environmental safety
pub_type: 杂志文章
doi:10.1016/j.ecoenv.2018.10.047
更新日期:2019-01-30 00:00:00
abstract::The Medaka Extended One Generation Reproduction Test (MEOGRT) is a Tier 2 test within U.S. Environmental Protection Agency's (USEPA) Endocrine Disruptor Screening Program (EDSP), designed to characterize the potential adverse effects to fish of exposure to chemical that can cause disruption of the endocrine system. Th...
journal_title:Ecotoxicology and environmental safety
pub_type: 杂志文章
doi:10.1016/j.ecoenv.2018.06.088
更新日期:2018-10-30 00:00:00
abstract::High temperature damage impairs the growth of tall fescue by inhibiting secondary metabolites. Little is known about the regulation pattern of the fatty acids and carbohydrate metabolism at the whole-transcriptome level in tall fescue under high temperature stress. Here, two tall fescue genotypes, heat tolerant PI5787...
journal_title:Ecotoxicology and environmental safety
pub_type: 杂志文章
doi:10.1016/j.ecoenv.2020.110943
更新日期:2020-10-15 00:00:00
abstract::In this study, the pathways for migration of phosphorus flame retardants (PFRs), tris(1,3-dichloroisopropyl) phosphate (TDCPP) and tricresyl phosphate (TCsP) which were detected from curtains often, from flame-retardant-treated polyester curtains to indoor dust were investigated. Two possible migration pathways were c...
journal_title:Ecotoxicology and environmental safety
pub_type: 杂志文章
doi:10.1016/j.ecoenv.2018.11.052
更新日期:2019-03-01 00:00:00
abstract::Subalpine wetland is a mercury (Hg) sensitive ecosystem, but there is poor understanding of Hg behavior in this typical wetland. Here, distribution and speciation of Hg in waters of a subalpine wetland (Dajiuhu) in China were investigated, and an initial model of the Hg geochemical cycle in the wetland was established...
journal_title:Ecotoxicology and environmental safety
pub_type: 杂志文章
doi:10.1016/j.ecoenv.2020.111507
更新日期:2021-01-15 00:00:00
abstract::Brominated flame retardants (BFRs) and Dechlorane Plus (DP) were measured in both human hair and paired serum samples from a cohort of university students in South China. Segmental analysis was conducted to explore gender difference and the relationships between the hair and serum. The concentrations of total PBDEs in...
journal_title:Ecotoxicology and environmental safety
pub_type: 杂志文章
doi:10.1016/j.ecoenv.2017.09.047
更新日期:2018-01-01 00:00:00
abstract::Amaranthus mangostanus L. (amaranth) was hydroponically grown in different concentrations of biochar amended nutrient solution to investigate the mineral elements migration and physiological response of amaranth as affected by biochar. Our results showed that exposure to 26.6 g/L of biochar greatly increased the root ...
journal_title:Ecotoxicology and environmental safety
pub_type: 杂志文章
doi:10.1016/j.ecoenv.2019.03.039
更新日期:2019-07-15 00:00:00
abstract::Benzo[a]pyrene (BaP) is a model compound of polycyclic aromatic hydrocarbons. The relationship between its toxicity and some target biomolecules has been investigated. To reveal the interactions of BaP biodegradation and metabolic network, BaP intermediates, proteome, carbon metabolism and ion transport were analyzed....
journal_title:Ecotoxicology and environmental safety
pub_type: 杂志文章
doi:10.1016/j.ecoenv.2019.01.044
更新日期:2019-05-15 00:00:00
abstract::Perfluorooctanoic acid (PFOA) and perfluorooctane sulfonate (PFOS) have been reported to cause adverse health effects on wildlife as well as humans. Numerous studies demonstrated that PFOA and PFOS could interfere with the transcriptional activation of estrogen receptor α (ERα) by mimicking the function of endogenous ...
journal_title:Ecotoxicology and environmental safety
pub_type: 杂志文章
doi:10.1016/j.ecoenv.2019.01.027
更新日期:2019-04-30 00:00:00
abstract::A rare sexual-only race of Dugesia dorotocephala produces offspring from cocoons rather than by fissioning, allowing individuals to be accurately aged. Because each animal possesses fully developed male and female reproductive systems and a true brain with synapses, many types of toxicological studies which normally u...
journal_title:Ecotoxicology and environmental safety
pub_type: 杂志文章
doi:10.1016/0147-6513(89)90022-5
更新日期:1989-12-01 00:00:00
abstract::In 2010, the Deepwater Horizon oil spill released 134 million gallons of crude oil into the Gulf of Mexico making it the largest oil spill in US history. The three month oil spill left tens of thousands of birds dead; however, the fate of tens of thousands of other migratory birds that were affected but did not immedi...
journal_title:Ecotoxicology and environmental safety
pub_type: 杂志文章
doi:10.1016/j.ecoenv.2017.05.028
更新日期:2017-12-01 00:00:00
abstract::Nonylphenol (NP) is one of commonly detected contaminants in the environment. Biological degradation is mainly responsible for remediation of NP-contaminated site. Knowledge about the structure of NP-degrading microbial community is still very limited. Microcosms were constructed to investigate the structure of microb...
journal_title:Ecotoxicology and environmental safety
pub_type: 杂志文章
doi:10.1016/j.ecoenv.2014.04.019
更新日期:2014-08-01 00:00:00
abstract::The mineralization of [14C]acetate was studied in bottles with fresh soil and groundwater. Addition of toxicants inhibited the formation of 14CO2 and dose-effect curves were obtained. The acetate mineralization was not inhibited by zinc, cadmium, K2Cr2O7, chloropyrifos, and paraquat in an acid sandy soil at 1000 mg/kg...
journal_title:Ecotoxicology and environmental safety
pub_type: 杂志文章
doi:10.1006/eesa.1993.1036
更新日期:1993-08-01 00:00:00
abstract::Direct immersion solid phase microextraction (DI-SPME) coupled to liquid chromatography-tandem mass spectrometry (LC-MS/MS) is of significant research interest because of its low solvent consumption, simple design, and efficient, sensitive, fast performance. In this work, a combination of these two methods (DI-SPME-LC...
journal_title:Ecotoxicology and environmental safety
pub_type: 杂志文章
doi:10.1016/j.ecoenv.2019.03.104
更新日期:2019-07-30 00:00:00
abstract::Phytoremediation and bioremediation are site-specific processes, and feasibility studies should be performed as an initial step in scaling-up these processes. Soil microcosms can be a useful tool for investigating the efficiency of remediation alternatives under realistic conditions. In the present study, the degradat...
journal_title:Ecotoxicology and environmental safety
pub_type: 杂志文章
doi:10.1016/j.ecoenv.2011.08.009
更新日期:2011-11-01 00:00:00
abstract::In this study, we reported the design and the fabrication of Ag and TiO2 modified polycaprolactone (PCL) electrospun nanofiber (NF) mats. The as-prepared NF mats were fabricated by one-step electrospinning and it was exploited for three different purposes (i) reusable SERS substrate for quantitative analysis to trace ...
journal_title:Ecotoxicology and environmental safety
pub_type: 杂志文章
doi:10.1016/j.ecoenv.2019.109856
更新日期:2020-01-30 00:00:00
abstract::Herein we investigated the multi-phase distribution and estrogenic effects of endocrine disrupting chemicals (EDCs) in suspended particulate matter (SPM), colloids, and soluble phases from the Shaying River to assess the composition of estrogenic compounds and associated estrogenic risk. The yeast two hybrid (YES) met...
journal_title:Ecotoxicology and environmental safety
pub_type: 杂志文章
doi:10.1016/j.ecoenv.2019.02.016
更新日期:2019-05-30 00:00:00
abstract::Atlantic salmon smolts were exposed to three doses of the fungicide azoxystrobin for 4 days, and physiological blood parameters and transcriptional effects in liver and muscle were evaluated in search for potential negative effects. Azoxystrobin exposure mediated up-regulation of catalase, MAPK1 and IGFBP1 in liver ti...
journal_title:Ecotoxicology and environmental safety
pub_type: 杂志文章
doi:10.1016/j.ecoenv.2010.07.017
更新日期:2010-11-01 00:00:00
abstract::Pollinator populations are in decline worldwide. Multiple factors have been cited as potential causes to these declines. In honey bees, a combination of stressors is known to cause colony losses. Adequate nutrition is a key factor for honey bee growth and colony development. Several studies show that the nutritional q...
journal_title:Ecotoxicology and environmental safety
pub_type: 杂志文章
doi:10.1016/j.ecoenv.2019.109917
更新日期:2020-02-01 00:00:00
abstract::A basic theory of nonspecific toxicity has been developed using bioconcentration as a basis and applying kinetic relationships developed in previous work. This approach has involved calculation of the critical volume fraction and critical concentration in lipid tissue of fish for a variety of organic compounds at the ...
journal_title:Ecotoxicology and environmental safety
pub_type: 杂志文章
doi:10.1016/0147-6513(92)90001-j
更新日期:1992-12-01 00:00:00
abstract::Nanoparticles (NPs) are inevitably released into the aquatic environment for being widely used and may affect the toxicity of other contaminants already present in the environment, such as trace metals. However, the effects of NPs on the ecotoxicity of cadmium (Cd), a common environmental trace metal pollutant, are no...
journal_title:Ecotoxicology and environmental safety
pub_type: 杂志文章
doi:10.1016/j.ecoenv.2018.03.007
更新日期:2018-07-30 00:00:00
abstract::The adsorption of sulfamethoxazole (SMZ) and ketoprofen (KET) using carbon nanotubes (CNTs) and CNTs modified with ionic liquids (ILs) was investigated. Two ionic liquids (1-benzyl, 3-hexyl imidazolium, IL1 and 1-benzyl, 3-decahexyl imidazolium, IL2) were synthesized, and characterized by nuclear magnetic resonance (1...
journal_title:Ecotoxicology and environmental safety
pub_type: 杂志文章
doi:10.1016/j.ecoenv.2018.06.019
更新日期:2018-10-01 00:00:00
abstract::The aim of the present study was to assess the physiological response of male zebrafish Danio rerio to the fungicide tebuconazole and recovery in fungicide-free water. Acute toxicity tests were carried out and the median lethal concentration (LC(50)) from 24 to 96 h was calculated. The fish were exposed to a sublethal...
journal_title:Ecotoxicology and environmental safety
pub_type: 杂志文章
doi:10.1016/j.ecoenv.2009.09.020
更新日期:2010-03-01 00:00:00
abstract::The in vivo and in vitro influence of MnCl2 on carp pronephros cells was investigated. Increased cytotoxicity against both YAC-1 and P 815 target cells was observed following an intraperitoneal injection of 40, 80, or 120 micrograms MnCl2/g body wt administrated 24 hr prior to the in vitro 51Cr release assay. Similarl...
journal_title:Ecotoxicology and environmental safety
pub_type: 杂志文章
doi:10.1016/0147-6513(90)90003-n
更新日期:1990-12-01 00:00:00
abstract::Three-dimensional (3D) porous graphene oxide-maize amylopectin (GO-MA) composites with controllable pore-sizes composites in the range of 6-40 nm were prepared by facile hydrothermal-assisted assembly approaches. The morphologies, pore sizes, specific surface area (SSA) and compositions of GO-MAx:y composites with and...
journal_title:Ecotoxicology and environmental safety
pub_type: 杂志文章
doi:10.1016/j.ecoenv.2019.03.069
更新日期:2019-07-30 00:00:00
abstract::Community-scale impacts of glyphosate-based herbicides on wetland plant communities and the magnitude of those impacts that should be considered biologically relevant are poorly understood. We contrast three different thresholds for setting biologically meaningful critical effect sizes for complex ANOVA study designs....
journal_title:Ecotoxicology and environmental safety
pub_type: 杂志文章
doi:10.1016/j.ecoenv.2019.109475
更新日期:2019-11-15 00:00:00
abstract::Toxic effects of unbleached (sulfate or sulfite) and bleached (sulfate) paper mill effluents were studied in a primary culture of rainbow trout liver cells. The effluents and control water from a clean area were extracted with diethyl ether and added to the cultures dissolved in dimethyl sulfoxide. Plasma membrane int...
journal_title:Ecotoxicology and environmental safety
pub_type: 杂志文章
doi:10.1016/0147-6513(92)90036-3
更新日期:1992-08-01 00:00:00
abstract::Lead (Pb) is a non-essential metal. Its occurrence in the environment is related principally to anthropogenic contamination. Pb is toxic to aquatic organisms and can provoke damage to membranes and inhibit the activity of essential enzymes. The filter-feeding, Manila clam Ruditapes philippinarum is widely used as a bi...
journal_title:Ecotoxicology and environmental safety
pub_type: 杂志文章
doi:10.1016/j.ecoenv.2018.04.033
更新日期:2018-08-30 00:00:00
abstract::Predicted climate change could impact the effects that various chemicals have on organisms. Increased temperature or change in precipitation regime could either enhance or lower toxicity of pesticides. The aim of this study is to assess how change in temperature and soil moisture affect biochemical biomarkers in Eisen...
journal_title:Ecotoxicology and environmental safety
pub_type: 杂志文章
doi:10.1016/j.ecoenv.2017.10.072
更新日期:2018-02-01 00:00:00
abstract::In a recent study, we showed that the earthworm species Eisenia fetida, inhabiting an extremely high metal polluted compost heap on a wine farm, did not have elevated body loads of the metals but exhibited genotoxic tolerance when exposed to Cd in the laboratory (Voua Otomo and Reinecke, 2010). To unravel the mechanis...
journal_title:Ecotoxicology and environmental safety
pub_type: 杂志文章
doi:10.1016/j.ecoenv.2011.05.014
更新日期:2011-10-01 00:00:00