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Chemosphere

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https://www.readbyqxmd.com/read/30448757/enhanced-phytoremediation-of-uranium-contaminated-soils-by-arbuscular-mycorrhiza-and-rhizobium
#1
Cheng-Gang Ren, Cun-Cui Kong, Shuo-Xiang Wang, Zhi-Hong Xie
Uranium phytoextraction is a promising technology, however, facing difficult that limited plant biomass due to nutrient deficiency in the contaminated sites. The aim of this study is to evaluate the potential of a symbiotic associations of a legume Sesbania rostrata, rhizobia and arbuscular mycorrhiza fungi (AMF) for reclamation of uranium contaminated soils. Results showed AMF and rhizobia had a mutual beneficial relations in the triple symbiosis, which significantly increased plant biomass and uranium accumulation in S...
November 13, 2018: Chemosphere
https://www.readbyqxmd.com/read/30448756/treatment-of-low-level-cu-ii-wastewater-and-regeneration-through-a-novel-capacitive-deionization-electrodeionization-cdi-edi-technology
#2
Chunxia Zhao, Lifang Zhang, Rongshu Ge, Ailin Zhang, Chunhui Zhang, Xiaoxin Chen
It was difficult for mature technologies to manage the low-level heavy metal wastewater due to low efficiency, secondary pollution and difficult enrichment. In this study, a novel capacitive deionization-electrodeionization (CDI-EDI) technology was developed through coordination mechanism of electromigration, electro-adsorption and ion exchange. Based on this technique, the low-content heavy metal ions in high-salinity wastewater could be removed efficiently. Moreover, a higher electro-adsorption CDI electrode was applied in the CDI-EDI stack...
November 13, 2018: Chemosphere
https://www.readbyqxmd.com/read/30448752/adsorption-and-photocatalytic-removal-of-ibuprofen-by-activated-carbon-impregnated-with-tio-2-by-uv-vis-monitoring
#3
Ying Gu, Jan Yperman, Robert Carleer, Jan D'Haen, Jens Maggen, Sara Vanderheyden, Kenny Vanreppelen, Roberto Machado Garcia
The removal of Ibuprofen was investigated by activated carbon impregnated with TiO2 . Emphasis was given on the effect of different parameters, such as composite type, initial Ibuprofen concentration (5-25 mg/L), temperature (22-28 °C) and pH (acidic and alkaline solution). The experiment was carried out in a self-made tubular flow reactor, with one 15 W monochromatic UV lamp (254 nm). The composite AC90T10 gives the highest removal degree of 92% of Ibuprofen solution under UV light within 4 h, due to synergy of adsorption and photodegradation...
November 13, 2018: Chemosphere
https://www.readbyqxmd.com/read/30445397/microalgal-whole-cell-biomarkers-as-sensitive-tools-for-fast-toxicity-and-pollution-monitoring-of-urban-wet-weather-discharges
#4
Antoine Gosset, Claude Durrieu, Pauline Barbe, Christine Bazin, Rémy Bayard
Urban wet weather discharge (UWWD) management is an important issue. UWWD often represents a significant source of pollution in all aquatic bodies. The occurrence of this pollution is difficult to predict due to the variability of storm events and the unknown contents of urban watershed leached out by rain. Previous studies have tried to demonstrate the ecotoxic impact of UWWD. However, most of them merely highlight the limitations of classic monospecific bioassays, given the high dilution of micropollutants or the presence of nutrients masking toxic effects...
November 13, 2018: Chemosphere
https://www.readbyqxmd.com/read/30445396/mrna-expression-of-antioxidant-and-biotransformation-enzymes-in-zebrafish-danio-rerio-embryos-after-exposure-to-the-tricyclic-antidepressant-amitriptyline
#5
Pavla Sehonova, Andrea Zikova, Jana Blahova, Zdenka Svobodova, Petr Chloupek, Werner Kloas
Now-a-days, the occurrence of antidepressant residues in surface waters has become a major concern. Amitriptyline (AMI) has been described to treat depression and other disorders for decades. However, little is known about its effect on non-target organisms. The aim of this study was to assess the potential impact of AMI on the mRNA expression of antioxidant and detoxification enzymes during the early embryonic development of zebrafish (Danio rerio). Fertilized D. rerio embryos were exposed to AMI at concentrations of 300 ng/L and 30 μg/L and sampled 24, 48, 96, and 144 h post fertilization (hpf) to assess the mRNA expressions of cytochrome P450 1A1, glutathione-S-transferase, glutathione peroxidase, superoxide dismutase, and catalase...
November 13, 2018: Chemosphere
https://www.readbyqxmd.com/read/30448753/tio-2-nanoparticles-and-bpa-are-combined-to-impair-the-development-of-offspring-zebrafish-after-parental-coexposure
#6
Lianguo Chen, Chenyan Hu, Yongyong Guo, Qipeng Shi, Bingsheng Zhou
Titanium dioxide (TiO2 ) nanoparticles and bisphenol A (BPA) in aquatic environments interact reciprocally to enhance the maternal transfer of pollutants to offspring, thus varying the innate toxicities during early embryonic development. However, it remains unexplored regarding the molecular mechanisms of developmental toxicity in offspring after parental coexposure. In the present study, adult zebrafish were exposed to TiO2 nanoparticles (100 μg/L), BPA (20 μg/L) or their binary mixture for four months...
November 12, 2018: Chemosphere
https://www.readbyqxmd.com/read/30448751/aqueous-and-solid-phase-molybdenum-geochemistry-of-oil-sands-fluid-petroleum-coke-deposits-alberta-canada
#7
Jared M Robertson, Jake A Nesbitt, Matthew B J Lindsay
Fluid petroleum coke generated at oil sands operations in the Athabasca Oil Sands Region of northern Alberta, Canada, contains elevated concentrations of molybdenum (Mo) and other metals including nickel (Ni) and vanadium (V). Solid-phase Mo concentrations in fluid petroleum coke are typically 10 to 100 times lower than V and Ni, yet dissolved Mo concentrations in associated pore waters are often comparable with these metals. We collected pore water and solids from fluid petroleum coke deposits in the AOSR to examine geochemical controls on Mo mobility...
November 12, 2018: Chemosphere
https://www.readbyqxmd.com/read/30448750/effects-of-ion-species-on-the-disinfection-byproduct-formation-in-artificial-and-real-water
#8
Min Zhang, Hui Ma, Huihui Wang, Tingting Du, Mengmeng Liu, Yingying Wang, Tong Zhang, Yao Li
Disinfection byproducts (DBPs) have attracted extensive attention due to their cytotoxicity and genotoxicity. This study investigates the effects of different ions on DBP formation during chlorination and chloramination in artificial and real water samples. Compared with chlorination, chloramination can reduce the formation of DBPs. K+ only reduce the formation of DBPs during chloramination. Ca2+ forms less DBPs than Mg2+ does during chlorination and chloramination due to the stronger binding effect. Al3+ and their hydroxide colloids have a significant effect on DBP formation...
November 12, 2018: Chemosphere
https://www.readbyqxmd.com/read/30448749/environmental-impact-assessment-of-industrial-activities-on-heavy-metals-distribution-in-street-dust-and-soil
#9
Hossein Khademi, María Gabarrón, Ali Abbaspour, Silvia Martínez-Martínez, Angel Faz, Jose A Acosta
Street dust and soil are important materials for evaluating the contaminants level in industrial areas. Detailed size-resolved distribution of metal(loid)s in street dusts and soils influenced by industrial activities has rarely been investigated. This study was carried out to understand how industrialization might affect the size distribution of metal(loid)s concentration and contamination level in the street dust and soil from Murcia, southern Spain. An industrial and a natural areas were selected and surface soil and street dust samples were taken...
November 12, 2018: Chemosphere
https://www.readbyqxmd.com/read/30448747/effects-of-polystyrene-microplastics-on-the-composition-of-the-microbiome-and-metabolism-in-larval-zebrafish
#10
Zhiqin Wan, Caiyun Wang, Jiajie Zhou, Manlu Shen, Xiaoyu Wang, Zhengwei Fu, Yuanxiang Jin
Microplastics are major pollutants in marine environment and may have health effects on aquatic organisms. In this study, we used two sizes (5 and 50 μm diameter) of fluorescent and virgin polystyrene microplastics to analyze the adverse effects on larval zebrafish. In our study, we evaluated the effects on larval zebrafish after exposure to 100 and 1000 μg/L of two sizes of polystyrene microplastics for 7 days. Our results show that polystyrene microplastics could cause alterations in the microbiome at the phylum and genus levels in larval zebrafish, including changes in abundance and diversity of the microbiome...
November 12, 2018: Chemosphere
https://www.readbyqxmd.com/read/30453275/electrochemical-oxidation-of-gaseous-benzene-on-a-sb-sno-2-foam-ti-nano-coating-electrode-in-all-solid-cell
#11
Bo Zhang, Min Chen, Changbin Zhang, Hong He
An all-solid cell with a solid polymer electrolyte was applied to electrochemical oxidation of low-concentration indoor gaseous aromatic pollution. Antimony-doped tin dioxide nanocoatings deposited on a titanium foam substrate (Ti/Sb-SnO2 ) with different Sb/Sn ratios (4.8-14.0 mol%) and loading weight of Sb-SnO2 (4.4-7.7 mg cm- 2 ) were used as dimensionally stable anodes. Sn and Sb were homogeneously dispersed on the substrate, and a crack-free nanocoating was built when the loading of nanocoating was increased to 6...
November 10, 2018: Chemosphere
https://www.readbyqxmd.com/read/30445404/selection-of-organosilicone-surfactants-for-tank-mixed-pesticides-considering-the-balance-between-synergistic-effects-on-pests-and-environmental-risks
#12
Bei-Xing Li, Yang Liu, Peng Zhang, Xiao-Xu Li, Xiu-Yu Pang, Yun-He Zhao, Hua Li, Feng Liu, Jin Lin, Wei Mu
In this study, the bioactivities of binary mixtures of organosilicone surfactants and indoxacarb against two Lepidopteran pests were investigated along with their environmental risks. All of the tested organosilicone surfactants had obvious synergistic effects on the contact toxicity of indoxacarb against Spodoptera exigua and Agrotis ipsilon. However, all of the organosilicone surfactants exhibited certain antagonism for indoxacarb against S. exigua in terms of stomach & contact toxicity; both Silwet-408 and Silwet-806 exhibited additivity against A...
November 10, 2018: Chemosphere
https://www.readbyqxmd.com/read/30447611/neurobehavioral-effects-of-bisphenol-s-exposure-in-early-life-stages-of-zebrafish-larvae-danio-rerio
#13
Jie Gu, Jiayao Zhang, Yaoyao Chen, Hongye Wang, Min Guo, Lei Wang, Zhen Wang, Shengmin Wu, Lili Shi, Aihua Gu, Guixiang Ji
As an alternate of bisphenol A (BPA), bisphenol S (BPS) is now widely used to produce our daily consumer goods. Some studies have shown that BPS has the potential to disrupt the reproduction and glucose homeostasis. However, the impact of BPS on the nervous system remains unclear. The purpose of this study is to investigate the impact of BPS on the nervous systems of zebrafish in their early growing stages. The 96 h-LC50 value of BPS to zebrafish larvae was 323 mg/L (95%CI: 308-339 mg/L). Zebrafish embryos were exposed to BPS at concentrations of 0, 0...
November 9, 2018: Chemosphere
https://www.readbyqxmd.com/read/30447610/assessment-of-the-adverse-impacts-of-aflatoxin-b-1-on-gut-microbiota-dependent-metabolism-in-f344-rats
#14
Jun Zhou, Lili Tang, Jia-Sheng Wang
The adverse impacts of AFB1 on gut-microbiota dependent metabolism in F344 rats were assessed via ultra-high performance liquid chromatography (UHPLC)-profiling and UHPLC-mass spectrometry (MS) metabolomic analyses. UHPLC-profiling analysis found 1100 raw peaks from the fecal samples collected at week 4, of which 335 peaks showed peak shape qualified for quantitation. A total of 24, 40 and 71 peaks were significantly decreased (>2-fold, p < 0.05) among the exposure groups treated with 5, 25, and 75 μg AFB1 kg-1 body weight (B...
November 9, 2018: Chemosphere
https://www.readbyqxmd.com/read/30445403/response-of-freshwater-sediment-archaeal-community-to-metal-spill
#15
Qingwei Guo, Ningning Li, Sili Chen, Yao Chen, Shuguang Xie
Archaea play an important role in the biogeochemical cycling of elements in the environment. Heavy metals are ubiquitous pollutants in the environment. Previous studies have revealed a considerable influence of metal pollution on the archaeal community, but the short-term response of the archaeal community to metal pollution remains unclear. Hence, the present study investigated the short versus long-term responses of overall archaeal communities in freshwater sediments after exposure to accidental metal pollution caused by the discharge of heavy metal-containing wastewater from an indium-producing factory...
November 9, 2018: Chemosphere
https://www.readbyqxmd.com/read/30447615/environmental-and-behavioral-determinants-affecting-the-association-of-airway-macrophages-carbon-load-with-distance-to-major-roads-and-traffic-density
#16
Seyed Mojtaba Momtaz, Parvin Mehdipour, Payam Dadvand, Mohammad Hassan Ehrampoush, Mohammad Taghi Ghaneian, Mohammad Hassan Lotfi, Alireza Sarsangi Aliabad, Fereshte Molavi, Mohammad Javad Zare Sakhvidi
Biomarkers are promising indicators to evaluate human exposure to air pollutants and to predict the health outcomes. Area of Airway macrophages that is occupied by Black Carbon could be used as a biomarker of personal long term exposure to traffic related air pollution. Association of airway macrophages carbon load with weighted average distance and environmental and subject-specific behavior are considered in this study. Sputum samples were taken from 160 healthy adult women and airway macrophages carbon load (AMCL) were determined in 93 subjects, which represent a success rate of 62% in sputum induction...
November 8, 2018: Chemosphere
https://www.readbyqxmd.com/read/30447609/changes-of-nitrogen-removal-performance-and-that-of-the-bacterial-community-in-a-mixed-culture-comprising-freshwater-and-marine-anammox-bacteria-under-averaged-environmental-condition
#17
Yasunori Kawagoshi, Yuki Yamashita, Luong Van Duc, Takehide Hama, Hiroaki Ito
Nitrogen-removal processes using anammox bacteria are expected to achieve high-rate removal while remaining economical, and their practical applications have been investigated. However, anammox bacteria still have unfavorable characteristics for practical use, including susceptibility to a change in environmental conditions. In this study, with an aim of exploring the adaptability of mixed anammox bacteria to environmental conditions, the shift of nitrogen-removal performance and bacterial community in a mixed culture comprising freshwater anammox bacteria (FAB) and marine anammox bacteria (MAB) were investigated by a continuously stirred tank reactor (CSTR)...
November 8, 2018: Chemosphere
https://www.readbyqxmd.com/read/30447612/characterization-of-leachates-from-waste-landfill-sites-in-a-religious-camp-along-lagos-ibadan-expressway-nigeria-and-its-hepatotoxicity-in-rats
#18
Aemere Ogunlaja, Sunny O Abarikwu, Chiagoziem A Otuechere, Olufisayo O Oshoro
Landfill sites near human settlements are known to have adverse health effects. Here, we investigated the effect of different concentrations of leachates from the Redemption Camp landfill (RCLL, 10%, 30%, 50%) on the liver of adult female rats after 21 days of exposure in their drinking water. The physicochemical and metal analyses showed that biochemical oxygen and chemical oxygen demand, zinc and magnesium levels were significantly high, whereas copper level was low in RCLL when compared to water samples from residential areas close to the landfill site, and were higher than the acceptable limits (p < 0...
November 7, 2018: Chemosphere
https://www.readbyqxmd.com/read/30445395/application-of-a-novel-gene-encoding-bromophenol-dehalogenase-from-ochrobactrum-sp-t-in-tbbpa-degradation
#19
Zhishu Liang, Guiying Li, Bixian Mai, Huimin Ma, Taicheng An
Tetrabromobisphenol-A (TBBPA), a typical brominated flame retardant, leaked from commercial products into the environments has attracted people's attention around the world. Ochrobactrum sp. T capable of degradation and mineralization of TBBPA was isolated in our early work. In this study, the identification of TBBPA-degrading gene from the strain was further carried out by combining whole-genome sequencing with gene cloning and expression procedures. In total, 3877 open reading frames were found within 3.9 Mb genome and seven of them were identified as dehalogenating-relating genes...
November 7, 2018: Chemosphere
https://www.readbyqxmd.com/read/30419383/growth-antioxidant-capacity-intestinal-morphology-and-metabolomic-responses-of-juvenile-oriental-river-prawn-macrobrachium-nipponense-to-chronic-lead-exposure
#20
Zhili Ding, Youqin Kong, Xianping Shao, Yixiang Zhang, Cicheng Ren, Xiaoman Zhao, Wangshu Yu, Tingqi Jiang, Jinyun Ye
Understanding the mechanisms of metal toxicity to organisms farmed for food may suggest mitigation strategies. We determined the 24-, 48-, 72-, and 96-h median lethal concentrations of lead in juvenile oriental river prawn (Macrobrachium nipponense). The prawns were then exposed to sub-lethal concentrations (13.13 and 26.26 μg/L) of lead for 60 days and growth, antioxidant enzyme activity, intestinal morphology, and metabolite profiles were assessed. Prawns exposed to 26.26 μg/L but not to 13.13 μg/L lead exhibited lower weight gain than controls...
November 6, 2018: Chemosphere
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