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Bulletin of Environmental Contamination and Toxicology

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https://www.readbyqxmd.com/read/28528485/lead-and-arsenic-accumulation-and-its-effects-on-plasma-cortisol-levels-in-oreochromis-sp
#1
Nguyen Quoc Thang, Bui The Huy, Le Van Tan, Nguyen Thi Kim Phuong
The accumulation, elimination and effect of heavy metals on plasma cortisol levels in Oreochromis sp. were studied in the exposure and recovery phases. In the exposure phase, the mean rate of accumulation in the tissues was in the order gill > liver > muscle for Pb exposure and muscle > liver > gill for As exposure. In the recovery phase, the order of elimination in the tissues was gill > liver > muscle for Pb and liver > gill > muscle for As. The amount of cortisol secreted by the Oreochromis sp...
May 20, 2017: Bulletin of Environmental Contamination and Toxicology
https://www.readbyqxmd.com/read/28528484/current-contamination-status-of-perfluoroalkyl-substances-in-tapwater-from-17-cities-in-the-eastern-china-and-their-correlations-with-surface-waters
#2
Ke-Yan Tan, Guo-Hui Lu, Hai-Tao Piao, Shu Chen, Xing-Chun Jiao, Nan Gai, Eriko Yamazaki, Nobuyoshi Yamashita, Jing Pan, Yong-Liang Yang
The contamination status of perfluoroalkyl substances (PFASs) were investigated in 64 tapwater samples collected from 17 cities and 45 surface water samples from adjacent areas in the eastern China. The total PFAS concentrations in tapwater ranged from 1.4 to 175 ng/L; relatively higher PFAS levels were observed in samples collected from the Yangtze River Delta region, which was similar to the geographical distribution pattern of PFAS levels observed in rivers and lakes. The highest total PFASs in tapwater was found in Changshu, where several fluorine-related industries are located, whereas the lowest was observed in Beijing...
May 20, 2017: Bulletin of Environmental Contamination and Toxicology
https://www.readbyqxmd.com/read/28526924/effects-of-water-ph-on-life-history-parameters-of-a-new-bosminid-cladocera-bosmina-bosmina-tripurae-korinek-saha-and-bhattachaya-1999-in-laboratory-condition
#3
Himadri Saha, K S Wisdom, Asem Lembika Devi, Da-U-Ruhi Pde, Sukham Tuni Devi, Makamguang Kamei, Anamika Biswas, Ratan K Saha, Prasenjit Pal
The effects of water pH on life history parameters of Bosmina tripurae have been studied to determine the most suitable water pH desired for the maximum growth and development of this newly discovered cladoceran species. The study was carried out under the laboratory condition at 20 ± 2°C. Five pH ranges 5.0 ± 0.2, 6.0 ± 0.2, 7.0 ± 0.2, 8.0 ± 0.2 and 9.0 ± 0.2 with six replicates for each pH consisting of one animal in each Petri dish (80 × 15 mm) were used for the study...
May 19, 2017: Bulletin of Environmental Contamination and Toxicology
https://www.readbyqxmd.com/read/28523368/two-stage-prediction-on-effects-of-mixtures-containing-phenolic-compounds-and-heavy-metals-on-vibrio-qinghaiensis-sp-q67
#4
Ling-Yun Mo, Jie Liu, Li-Tang Qin, Hong-Hu Zeng, Yan-Peng Liang
Two-stage prediction (TSP) model had been developed to predict toxicities of mixtures containing complex components, but its prediction power need to be further validated. Six phenolic compounds and six heavy metals were selected as mixture components. One mixture (M1) was built with equivalent-effect concentration ratio and four mixtures (M2-M5) were designed with fixed concentration ratio. In M1-M5, the toxicities were well predicted by TSP model, while CA overestimated and IA underestimated the toxicities...
May 18, 2017: Bulletin of Environmental Contamination and Toxicology
https://www.readbyqxmd.com/read/28516255/water-quality-interaction-with-alkaline-phosphatase-in-the-ganga-river-implications-for-river-health
#5
Amita Yadav, Jitendra Pandey
Carbon, nitrogen and phosphorus inputs through atmospheric deposition, surface runoff and point sources were measured in the Ganga River along a gradient of increasing human pressure. Productivity variables (chlorophyll a, gross primary productivity, biogenic silica and autotrophic index) and heterotrophy (respiration, substrate induced respiration, biological oxygen demand and fluorescein diacetate hydrolysis) showed positive relationships with these inputs. Alkaline phosphatase (AP), however, showed an opposite trend...
May 17, 2017: Bulletin of Environmental Contamination and Toxicology
https://www.readbyqxmd.com/read/28516254/use-of-muscular-cholinesterase-of-astyanax-bifasciatus-teleostei-characidae-as-a-biomarker-in-biomonitoring-of-rural-streams
#6
Jardel Nimet, Ana Tereza Bittencourt Guimarães, Rosilene Luciana Delariva
Cholinesterase (ChE) activity was measured in Astyanax bifasciatus maintained in controlled conditions. Muscle ChE activity of individuals collected in field conditions in two seasons was compared among specimens collected in seven streams (forest and rural) of the lower Iguaçu river basin in association with physical, chemical, pesticides and biological factors. Significant differences in muscle ChE activity between control fish and fish collected in streams in both seasons were found, with higher activity in natural conditions...
May 17, 2017: Bulletin of Environmental Contamination and Toxicology
https://www.readbyqxmd.com/read/28508304/effects-of-pesticide-mixtures-on-zooplankton-assemblages-in-aquatic-microcosms-simulating-rice-paddy-fields
#7
Pengfei Xiao, Fuguang Liu, Yihua Liu, Sumei Yao, Guonian Zhu
The individual and combined effects of pesticides (chlorpyrifos, triadimefon and butachlor) on the zooplankton assemblages of microcosms were investigated. Laboratory microcosms were constructed with water and sediment to simulate aquatic conditions in China's rice paddy fields. Results from principal response curves analysis showed that butachlor and triadimefon had no significant impact individually on the population level in zooplankton assemblages. The deleterious effects of pesticide mixtures on the zooplankton were mainly caused by chlorpyrifos...
May 15, 2017: Bulletin of Environmental Contamination and Toxicology
https://www.readbyqxmd.com/read/28500355/fabrication-of-metal-organic-framework-mof-177-coatings-on-stainless-steel-fibers-for-head-space-solid-phase-microextraction-of-phenols
#8
Guan-Hua Wang, Yong-Qian Lei
Direct head-space solid-phase microextraction (HS-SPME) of phenols in water is usually difficult due to its polarity and solubility in aqueous matrix. Herein we report the fabrication of metal-organic framework MOF-177 coated stainless steel fiber for the HS-SPME of phenols (2-methylolphenol, 4-methylolphenol, 2,4-dimethylolphenol, 2,4-dichlorphenol, and 3-methyl-4-chlorophenol) in environmental water samples prior to the gas chromatography-mass spectrometry detection. Several parameters affecting the extraction efficiency were optimized in the experiment, including extraction temperature and time, the pH value and salt addition...
May 12, 2017: Bulletin of Environmental Contamination and Toxicology
https://www.readbyqxmd.com/read/28500354/assessment-of-mine-water-quality-using-heavy-metal-pollution-index-in-a-coal-mining-area-of-damodar-river-basin-india
#9
Mukesh Kumar Mahato, Gurdeep Singh, Prasoon Kumar Singh, Abhay Kumar Singh, Ashwani Kumar Tiwari
A total no. of 16 mine water (underground and opencast coal mine pump discharges) samples were collected from East Bokaro coalfield during pre-monsoon, monsoon and post-monsoon seasons. The concentrations of Fe, Mn, Cu, Pb, Zn, Ni, As, Se, Al, Cd and Cr were determined using inductively coupled plasma mass spectrometry for the assessment of spatio-temporal variations, source apportionment and heavy metal pollution indexing. The results demonstrated that concentrations of the metals showed significant seasonality and most variables exhibited higher levels in the pre-monsoon season...
May 12, 2017: Bulletin of Environmental Contamination and Toxicology
https://www.readbyqxmd.com/read/28497383/form-of-dietary-methylmercury-does-not-affect-total-mercury-accumulation-in-the-tissues-of-zebra-finch
#10
Claire W Varian-Ramos, Margaret Whitney, Gary W Rice, Daniel A Cristol
Exposure to mercury in humans, other mammals, and birds is primarily dietary, with mercury in the methylated form and bound to cysteine in the tissues of prey items. Yet dosing studies are generally carried out using methylmercury chloride. Here we tested whether the accumulation of total mercury in zebra finch blood, egg, muscle, liver, kidney or brain differed depending on whether dietary mercury was complexed with chloride or cysteine. We found no effect of form of mercury on tissue accumulation. Some previous studies have found lower accumulation of mercury in tissues of animals fed complexed mercury...
May 11, 2017: Bulletin of Environmental Contamination and Toxicology
https://www.readbyqxmd.com/read/28497382/attenuation-of-sulfur-dioxide-damage-to-wheat-seedlings-by-co-exposure-to-nitric-oxide
#11
Yang Liu, Yunfeng Li, Lingmei Li, Ying Zhu, Jinyang Liu, Guangzhe Li, Lin Hao
The protective function of nitric oxide (NO) has been extensively clarified in plant responses to abiotic stresses. However, little is known about the regulation of NO in plants exposed to sulfur dioxide (SO2). In the present study, we found that co-exposure to NO significantly attenuated SO2-induced wheat seedling growth inhibition. Data showed that NO efficiently prevented SO2-triggered oxidative stress, as indicated by decreasing reactive oxygen species production, lipid peroxidation, and electrolyte leakage...
May 11, 2017: Bulletin of Environmental Contamination and Toxicology
https://www.readbyqxmd.com/read/28484804/endosulfan-degradation-by-selected-strains-of-plant-growth-promoting-rhizobacteria
#12
Rupa Rani, Vipin Kumar
Sixty endosulfan tolerant bacterial strains were isolated from pesticide stressed agricultural soils. Five most tolerant strains were tested for plant growth promoting (PGP) activities and endosulfan degradation under different optimizing conditions in broth and soil. The strains PRB101 and PRB77 were the most efficient in terms of endosulfan degradation and PGP activities and showed solubilization indexes of 3.3 and 3.1 mm, indole acetic acid production of 71 and 68 μg mL(-1), siderophore zones of 13 mm each at the recommended dosage, respectively...
May 8, 2017: Bulletin of Environmental Contamination and Toxicology
https://www.readbyqxmd.com/read/28455811/historical-trends-of-polycyclic-aromatic-hydrocarbons-in-the-reservoir-sediment-of-the-dianchi-watershed-southwest-china
#13
Panpan Sun, Biao Xie, Yimin Song, Hao Yang, Yanhua Wang
Using gas-chromatography/mass spectrometry (GC-MS) method dating data ((210)Pb and (137)Cs) and OCPs signatures, the temporal distribution of polycyclic aromatic hydrocarbons (PAHs) was investigated in dated sediment core from Baoxianghe reservoir in Dianchi watershed, Southwest China. The concentrations of total PAHs were in the range of 162.3-762.2 ng g(-1) from 1945 to 2013. There showed an obvious increase from 1960s to 2000s. The distributions of PAHs were influenced by local population and Gross Domestic Product (GDP) during the period between1962 and 2004...
April 28, 2017: Bulletin of Environmental Contamination and Toxicology
https://www.readbyqxmd.com/read/28434068/assessment-of-ddt-and-metabolites-in-soil-and-sediment-of-potentially-contaminated-areas-of-bel%C3%A3-m-amazon-region-brazil
#14
Andreia Oliveira Rodrigues, Larissa Costa de Souza, Cássia Christina da Silva Rocha, Amilton Cesar Gomes da Costa, Rosivaldo de Alcântara Mendes
The aim of this study was to evaluate the distribution of DDT and metabolites in surface soils and soil profiles from two areas containing deposits of obsolete pesticides in Belém, Amazon Region, Brazil. DDT and metabolites were extracted by microwave assisted extraction and analyzed by gas chromatography with electron capture detection. Concentrations of total DDT in surface soil samples ranged from 64.22 mg kg(-1) in area 1 (A1) to 447.84 mg kg(-1) in area 2 (A2). Lower levels were found in soil profiles than at the surface (6...
April 22, 2017: Bulletin of Environmental Contamination and Toxicology
https://www.readbyqxmd.com/read/28434067/sediment-metal-contamination-in-the-kafue-river-of-zambia-and-ecological-risk-assessment
#15
Ethel M'kandawire, Kennedy Choongo, John Yabe, Maxwell Mwase, Ngonda Saasa, Shouta M M Nakayama, Nesta Bortey-Sam, Claudia A Blindauer
Zambia's Kafue River receives wastes from various sources, resulting in metal pollution. This study determined the degree of contamination of 13 metals (Al, Cr, Mn, Fe, Co, Ni, Cu, Zn, As, Se, Cd, Hg and Pb) in Kafue River sediment and the associated ecological risks at six sites in three different seasons. The level of contamination for most metals showed significant site and seasonal differences. The contamination factor and pollution load index indicated that concentrations of most metals particularly copper (Cu), cobalt (Co), manganese (Mn) and arsenic (As) were very high at sites within the Copperbelt mining area...
April 22, 2017: Bulletin of Environmental Contamination and Toxicology
https://www.readbyqxmd.com/read/28434066/toxicity-and-genotoxicity-of-three-antimicrobials-commonly-used-in-veterinary-medicine
#16
Anahí Magdaleno, Sofía Carusso, Juan Moretton
The toxicity of chlortetracycline (CTC), oxytetracycline (OTC) and enrofloxacin (ENF) was tested on two green algal species: the international standard Pseudokirchneriella subcapitata and the native Argentine species Ankistrodesmus fusiformis. All three antibiotics inhibited the algal growth. The most sensitive species was P. subcapitata, for which the EC50 for CTC, OTC and ENF were 1.19 ± 0.53, 0.92 ± 0.30 and 5.18 ± 3.80 mg L(-1), respectively. The EC50 for A. fusiformis, were 3.23 ± 0...
April 22, 2017: Bulletin of Environmental Contamination and Toxicology
https://www.readbyqxmd.com/read/28409193/dietary-accumulation-of-inorganic-selenium-by-a-larval-amphibian-hyla-chrysoscelis-and-influence-on-accumulation-of-background-mercury
#17
Christopher L Rowe, Andrew Heyes
Larval gray tree frogs (Hyla chrysoscelis) were exposed to inorganic Se (SeO2) added to the diet (10.2 and 86.3 ug/g dw) and monitored for accumulation and effect. Background concentrations of Hg were also measured in food and carcasses to assess possible effects of Se on Hg accumulation. Selenium was accumulated in a dose dependent manner, and life stages did not differ. No effects of Se exposure were observed on survival, growth, or time to metamorphosis. Mercury concentrations in carcasses, resulting from background concentrations in food, were significantly affected by the presence of Se...
April 13, 2017: Bulletin of Environmental Contamination and Toxicology
https://www.readbyqxmd.com/read/28401255/contaminants-in-liquid-organic-fertilizers-used-for-agriculture-in-japan
#18
Dao M Hai, Xuchun Qiu, Hai Xu, Masato Honda, Mitsuyasu Yabe, Kiwao Kadokami, Yohei Shimasaki, Yuji Oshima
To provide an overview of anthropogenic contaminants in liquid organic fertilizers (LOFs), products from four biogas plants in Kyushu, Japan, were analyzed for a wide range of contaminants, including copper, cadmium, tributyltin (TBT), dibutyltin (DBT), perfluorooctane sulfonate, 952 semi-volatile organic compounds, and 89 antibiotics. The highest concentrations of copper (31.1 mg/L) and cadmium (0.08 mg/L) were found in LOFs from the Hita biogas plant. Only ofloxacin and sulfapyridine were detected in total 89 antibiotics screened...
April 11, 2017: Bulletin of Environmental Contamination and Toxicology
https://www.readbyqxmd.com/read/28393305/acute-toxicity-of-imidazole-nitrate-ionic-liquids-with-varying-chain-lengths-to-earthworms-eisenia-foetida
#19
Yuting Shao, Zhongkun Du, Cheng Zhang, Lusheng Zhu, Jinhua Wang, Jun Wang
When ionic liquids (ILs) first came into use, we thought that they were safe. However, upon further investigation, researchers found that ILs are not harmless. In this study, the model soil organism, earthworms (Eisenia foetida), were used to study the acute toxicity of imidazole nitrate ionic liquids with varying chain lengths from 2 to 12. The experiment used two different methods, a filter paper contact test (48 h) and an artificial soil test (14 days), to determine the toxicity. These results demonstrated that the toxicity increased with the length of carbon chains until C8 and that the cut-off effect occurred at 1-octyl-3-methyl imidazole nitrates...
April 9, 2017: Bulletin of Environmental Contamination and Toxicology
https://www.readbyqxmd.com/read/28374113/determination-of-two-sulfonylurea-herbicides-residues-in-soil-environment-using-hplc-and-phytotoxicity-of-these-herbicides-by-lentil-bioassay
#20
Mohammad Mehdizadeh, Mohammad Taghi Alebrahim, Mahmoud Roushani
A HPLC-UV detection system was used for determination of sulfosulfuron and tribenuron methyl residues from soils. The soils were fortified with sulfosulfuron and tribenuron methyl at rates of 26 and 15 g a.i. ha(-1) respectively and samples were taken randomly on 0 (2 h), 1, 2, 4, 10, 20, 40, 60, 90 and 120 days after treatment. The final extracts were prepared for analysis by HPLC. The results showed that degradation of both herbicides in the silty loam soil was faster than sandy loam soil. Half-life of sulfosulfuron was ranged from 5...
April 3, 2017: Bulletin of Environmental Contamination and Toxicology
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