Abstract:
:Excessive nitrogen (N) input is one of the most important causative factors of lake eutrophication, which has aroused increasing public attention in past decades. Estrogen contamination is also an increasing environmental problem in aquatic systems around the world. Although both substances usually co-exist in aquatic ecosystems, many researches have only investigated the influences of either N or estrogen individually on sediment bacterial community and nitrous oxide (N2O) emission. Knowledge regarding the combined effects of N and estrogen is still very limited. In this study, a 30-day laboratory incubation experiment was performed to examine the impacts of different N sources (ammonium and nitrate) combined with 17β-estradiol (E2) on sediment bacterial community. High-throughput 16S rRNA gene sequencing technique was used and N2O emission was measured. The results revealed that the relative abundances of Proteobacteria and Bacteroidetes were higher in nitrate treatment than ammonium treatment. Compared to N treatments, N and E2 combined treatments showed higher relative abundances of Proteobacteria, Bacteroidetes, and Firmicutes, but lower relative abundances of Chloroflexi, Acidobacteria, and Actinobacteria over entire incubation period. At the genus level, the relative abundances of genera Flavobacterium, Pseudomonas, Arenimonas, Novosphingobium, Massilia, Aquabacterium, and Bacillus were enhanced by N treatments and especially N and E2 combined treatments, compared to sediment without addition of N and E2. However, the relative abundances of Sporacetigenium, Gaiella, Desulfatiglans, Nitrospira, and Haliangium were decreased in N treatments. Apart from the changes in bacterial community structure, N2O emission was also influenced by different treatments. Nitrate exerted a more significant positive effect on N2O emission than ammonium, and the cumulative emission of N2O was highest in nitrate and E2 combined treatment. Very low abundances of ammonia monooxygenase (amoA) gene and hydroxylamine oxidase (hao) gene were observed in sediments compared to other genes involved in N cycles (such as nitrate reductase (narG and napA) genes, nitrite reductase (nirB, nirK, and nrfA) genes, and nitric oxide reductase (norB) gene), implying that denitrification rather than nitrification played an important role in sediments. The abundances of napA, nirK, and norB were higher in N and E2 combined treatments, indicating that E2 might provide a carbon source for denitrifiers. Moreover, decrease in the abundance of nitrous oxide reductase (nosZ) gene during the denitrifying process in N and E2 combined treatment might be an important reason for increases of N2O emission. These results indicated that alterations of the bacterial community structure due to the co-existence of N and E2 could also change the abundances of genes involved in N cycle.
journal_name
Environ Resjournal_title
Environmental researchauthors
Li Y,Sun Y,Zhang H,Wang L,Zhang W,Niu L,Wang P,Wang Cdoi
10.1016/j.envres.2019.108769subject
Has Abstractpub_date
2019-12-01 00:00:00pages
108769issue
Pt Aeissn
0013-9351issn
1096-0953pii
S0013-9351(19)30566-3journal_volume
179pub_type
杂志文章abstract::The air pollution disasters in London in 1952, the Meuse valley in 1930, and in Donoroa, Pennsylvania, in 1948 made it clear that extremely high levels of particulate-based smog could produce large increases in the daily mortality rate. Recent studies of fluctuations in daily air pollution and daily mortality have rep...
journal_title:Environmental research
pub_type: 杂志文章
doi:10.1006/enrs.1994.1004
更新日期:1994-01-01 00:00:00
abstract:OBJECTIVE:To study pregnancy outcome including development of childhood cancer in areas within Sweden with the highest radioactive fallout after the Chernobyl accident in 1986. METHODS:Various Swedish health registries were used in order to identify all pregnancies and their outcome in Sweden according to the measured...
journal_title:Environmental research
pub_type: 杂志文章
doi:10.1006/enrs.1994.1070
更新日期:1994-11-01 00:00:00
abstract:BACKGROUND:Tuberculosis (TB) is a serious public health problem in China. There is evidence to prove that meteorological factors and exposure to air pollutants have a certain impact on TB. But the evidence of this relationship is insufficient, and the conclusions are inconsistent. METHODS:Descriptive epidemiological m...
journal_title:Environmental research
pub_type: 杂志文章
doi:10.1016/j.envres.2020.110310
更新日期:2020-10-22 00:00:00
abstract::Soil contaminants are common in industrialized countries, causing widespread contamination directly of soil and indirectly of ground water and food. Among these pollutants particular attention should be paid to soil mutagens and carcinogens due to their potentially hazardous effects on animal populations and human hea...
journal_title:Environmental research
pub_type: 杂志文章
doi:10.1006/enrs.2001.4317
更新日期:2002-01-01 00:00:00
abstract:OBJECTIVES:Uranium miners are chronically exposed to radon and its progeny, which are known to cause lung cancer and may be associated with leukemia. This study was undertaken to evaluate risk of non-lung solid cancers among uranium miners in Příbram region, Czech Republic. METHODS:A retrospective stratified case-coho...
journal_title:Environmental research
pub_type: 杂志文章
doi:10.1016/j.envres.2011.01.008
更新日期:2011-04-01 00:00:00
abstract::Recent data show that arsenic may play a role in obesity-related diseases. However, urinary arsenic studies report an inverse association between arsenic level and body mass index (BMI). We explored whether toenail arsenic, a long-term exposure measure, was associated with BMI in 74 welders with known arsenic exposure...
journal_title:Environmental research
pub_type: 杂志文章
doi:10.1016/j.envres.2014.03.010
更新日期:2014-05-01 00:00:00
abstract::Dust wipe samples collected in the field were tested by nondestructive X-ray fluorescence (XRF) followed by laboratory analysis with flame atomic absorption spectrophotometry (FAAS). Data were analyzed for precision and accuracy of measurement. Replicate samples with the XRF show high precision with an intraclass corr...
journal_title:Environmental research
pub_type: 杂志文章
doi:10.1006/enrs.2000.4058
更新日期:2000-06-01 00:00:00
abstract::Variation in individual susceptibility to arsenic-induced disease may be partially explained by genetic differences in arsenic metabolism. Mounting epidemiological evidence and in vitro studies suggest that methylated arsenic metabolites, particularly monomethylarsonic (MMA3), are more acutely toxic than inorganic ars...
journal_title:Environmental research
pub_type: 杂志文章
doi:10.1016/j.envres.2010.05.001
更新日期:2010-08-01 00:00:00
abstract::Toxicologic studies have shown that soluble transition metals in residual oil fly ash (ROFA) can induce pulmonary injury. In this study, we investigated the association between the fractional concentration of expired nitric oxide (FENO) and exposure to metal constituents of particulate matter with an aerodynamic mass ...
journal_title:Environmental research
pub_type: 杂志文章
doi:10.1016/s0013-9351(03)00017-3
更新日期:2003-10-01 00:00:00
abstract::We examined biomarkers of selenium status (whole blood Se; serum Se; glutathione peroxidase activity) and thyroid status (concentrations and ratios of thyroxine, T4; tri-iodothyronine, T3; albumin) in polar bears to assess variations among cohorts, and relationships to circulating concentrations of contaminants. Conce...
journal_title:Environmental research
pub_type: 杂志文章
doi:10.1016/j.envres.2011.08.009
更新日期:2011-11-01 00:00:00
abstract::Iron-modified graphitic carbon nitride (FG materials) was prepared through a simple and cost-effective method using iron oxide and melamine to achieve simultaneous oxidation and adsorption of arsenic. We hypothesized that graphitic carbon nitride oxidizes As(III) to As(V) under light irradiation, and the converted As(...
journal_title:Environmental research
pub_type: 杂志文章
doi:10.1016/j.envres.2020.109832
更新日期:2020-09-01 00:00:00
abstract::Simultaneous monitoring of the vapors in several sewer headspaces by three direct-reading instruments, the Century OVA flame ionization detector, a 10.2 eV H-Nu Photoionization Detector, and a Hydrogen Sulfide Ecolyzer revealed that the majority of condensable organic vapors in areas of the Metropolitan Sewer District...
journal_title:Environmental research
pub_type: 杂志文章
doi:10.1016/s0013-9351(86)80057-3
更新日期:1986-04-01 00:00:00
abstract:BACKGROUND:Lead is an established toxic substance, with wide-ranging health effects, including neurodevelopmental decrements and behavioural problems, even at low levels in blood. Anecdotal reports of lead melting to make fishing sinkers in South African subsistence fishing communities prompted the conduct of an epidem...
journal_title:Environmental research
pub_type: 杂志文章
doi:10.1016/j.envres.2013.05.009
更新日期:2013-10-01 00:00:00
abstract::Pharmaceuticals are designed to have physiological effects on target organisms. Their presence and effect in aquatic ecosystems in the Annapolis Valley in Nova Scotia is relatively unknown. Over-the-counter (OTC) and prescription drugs are continually introduced to aquatic ecosystems through treated sewage effluent ou...
journal_title:Environmental research
pub_type: 杂志文章
doi:10.1016/j.envres.2011.11.011
更新日期:2012-01-01 00:00:00
abstract::The present study depicts the geospatial relation between basinal geomorphology and heterogeneous arsenic (As) distribution in the Bengal Delta Plain (BDP). The distribution pattern largely varies throughout the study area (higher: Karimpur-II AsT average 214.73 μgL-1; lower: Tehatta AsT average 27.84 μgL-1). Both saf...
journal_title:Environmental research
pub_type: 杂志文章
doi:10.1016/j.envres.2020.110314
更新日期:2021-01-01 00:00:00
abstract::Blood lead (PbB) and hemoglobin levels (Hb) were determined in 40 battery repair/recycling shop workers, 16 radiator repair shop workers, and 20 children living in the immediate vicinity of these shops. Unexposed residents with similar socioeconomic status were also investigated. Mean PbB level was significantly highe...
journal_title:Environmental research
pub_type: 杂志文章
doi:10.1006/enrs.1999.4024
更新日期:2000-03-01 00:00:00
abstract::The influence of cadmium (Cd) body burden on mortality remains controversial. Excess mortality and the dose-response relationship between mortality and urinary cadmium excretion were investigated in this study among environmentally exposed subjects. A 15-year follow-up study was carried out on 3119 inhabitants (1403 m...
journal_title:Environmental research
pub_type: 杂志文章
doi:10.1016/j.envres.2005.08.014
更新日期:2006-03-01 00:00:00
abstract::Polar bears (Ursus maritimus) consume large quantities of seal blubber and other high trophic marine mammals and consequently have some of the highest tissue concentrations of organohalogen contaminants (OHCs) among Arctic biota. In the present paper we carried out a risk quotient (RQ) evaluation on OHC-exposed polar ...
journal_title:Environmental research
pub_type: 杂志文章
doi:10.1016/j.envres.2015.03.011
更新日期:2015-07-01 00:00:00
abstract::The practice of burning sugarcane obtained by non-mechanized harvesting exposes workers and the people of neighboring towns to high concentrations of particulate matter (PM) that is harmful to health, and may trigger a series of cardiorespiratory diseases. The aim of this study was to analyze the chemical composition ...
journal_title:Environmental research
pub_type: 杂志文章
doi:10.1016/j.envres.2014.07.030
更新日期:2014-11-01 00:00:00
abstract::The concentration of a number of trace elements (Ag, Al, As, B, Ba, Be, Bi, Cd, Cr, Co, Cu, Fe, Mg, Mn, Mo, Ni, Pb, Sb, Sc, Se, Sm, Sr, Sn, Tl, Ti, V and Zn) were determined in 42 commercialized denim garments (jeans and shirts), being dermal exposure subsequently assessed. Migration experiments with artificial acid a...
journal_title:Environmental research
pub_type: 杂志文章
doi:10.1016/j.envres.2019.02.030
更新日期:2019-05-01 00:00:00
abstract::Residents in close proximity to agricultural land are at risk of higher pesticide exposures. The purpose of this study was to generate national population-level exposure estimates for Canada for three commonly applied pesticides that are suspected carcinogens (2,4-dichlorophenoxyacetic acid (2,4-D), glyphosate and chl...
journal_title:Environmental research
pub_type: 杂志文章
doi:10.1016/j.envres.2020.110100
更新日期:2020-12-01 00:00:00
abstract::Polychlorobiphenyls (PCBs), polybromodiphenylethers (PBDEs) and organochlorine pesticides (OCPs), such as dichlorodiphenyltrichloroethane (DDT) and hexachlorobenzene (HCB), are considered as endocrine disruptors in laboratory and wild animals. This study investigated whether these compounds and their hydroxylated meta...
journal_title:Environmental research
pub_type: 杂志文章
doi:10.1016/j.envres.2012.09.004
更新日期:2013-01-01 00:00:00
abstract::Heat waves are considered to be increasing in frequency and intensity whereas they comprise a significant weather-related cause of deaths in several countries. Two heat waves occurred in Greece in summer 2007. These severe heat waves are assessed by analyzing the prevailing synoptic conditions, evaluating human therma...
journal_title:Environmental research
pub_type: 杂志文章
doi:10.1016/j.envres.2009.12.002
更新日期:2010-02-01 00:00:00
abstract::To determine which of the faster and slower large myelinated nerve fibers (alpha fiber group) are more sensitive to chronic lead exposure, the distribution of nerve conduction velocities (DCV) as well as conventional sensory nerve conduction velocity (SCV) were measured once a month for 20 and 11 months in two male le...
journal_title:Environmental research
pub_type: 杂志文章
doi:10.1006/enrs.1993.1118
更新日期:1993-08-01 00:00:00
abstract::Although the commercial synthesis of polychlorinated biphenyls (PCBs) has been banned in the United States for several decades, they are persistent in the environment with exposure mainly being through diet. The biologic and toxic effects of PCBs and their metabolites are due in part to their ability to interact with ...
journal_title:Environmental research
pub_type: 杂志文章
doi:10.1016/j.envres.2004.05.013
更新日期:2005-05-01 00:00:00
abstract::Pleural calcifications are described in 122 of 268 (45.5%) inhabitants of four villages (Metsovo, Anilio, Milea, and Votonosi) in a small area of northwestern Greece (total population about 5000). All affected individuals are of one ethnic group, Vlachi. Calcifications were not noted in any of the 103 persons in the c...
journal_title:Environmental research
pub_type: 杂志文章
doi:10.1016/0013-9351(85)90096-9
更新日期:1985-12-01 00:00:00
abstract::An iterative scheme of short-term bacterial mutagenesis assays and multidimensional liquid chromatographic methods was used to isolate mutagens from a neutral fraction of a complex carcinogenic tar formed as a by-product of coal gasification. Mutagens in the complementary reversed- and normal-phase liquid chromatograp...
journal_title:Environmental research
pub_type: 杂志文章
doi:10.1016/s0013-9351(86)80135-9
更新日期:1986-12-01 00:00:00
abstract::There is only limited monitoring data of black carbon for epidemiologic analyses. In the current study, we used the distributed lag models to evaluate the association between mortality outcomes (both total and cause-specific) and exposure to black carbon and fine particle (PM(2.5)) in Shanghai, China. During our resea...
journal_title:Environmental research
pub_type: 杂志文章
doi:10.1016/j.envres.2012.08.007
更新日期:2013-01-01 00:00:00
abstract::An attempt has been made to study the biochemical properties of lung alkaline phosphatase so that it may serve as a model for measuring the toxicity of air pollutants, especially metals. Lung was shown to be a better source of this enzyme in comparison to other organs in rats. The optimum pH, metal requirements, subst...
journal_title:Environmental research
pub_type: 杂志文章
doi:10.1016/s0013-9351(87)80053-1
更新日期:1987-06-01 00:00:00
abstract::This study uses soil lead as a means of describing the urban lead levels in the metropolitan area of the Twin Cities, and assesses the soil lead levels next to homes of neighborhoods of the metropolitan area. Lead levels of rural soils are around 5 micrograms/g. Near the city limits they increase to 25-50 micrograms/g...
journal_title:Environmental research
pub_type: 杂志文章
doi:10.1016/0013-9351(84)90076-8
更新日期:1984-06-01 00:00:00