Read by QxMD icon Read

Bulletin of Environmental Contamination and Toxicology

Ivan N Perez-Maldonado, Angeles C Ochoa-Martinez, Sandra T Orta-Garcia, Tania Ruiz-Vera, Jose A Varela-Silva
Human biomonitoring (HBM) is an appreciated tool used to evaluate human exposure to environmental, occupational or lifestyle chemicals. Therefore, the aim of this study was to evaluate the exposure levels for environmental chemicals in urine and blood samples of children from San Luis Potosí, Mexico (SLP). This study identifies environmental chemicals of concern such as: arsenic (45.0 ± 15.0 µg/g creatinine), lead (5.40 ± 2.80 µg/dL), t,t-muconic acid (266 ± 220 µg/g creatinine), 1-hydroxypyrene (0...
June 23, 2017: Bulletin of Environmental Contamination and Toxicology
Li Yan, Cuilan Li, Jinjing Zhang, Odeshnee Moodley, Shuoran Liu, Chang Lan, Qiang Gao, Wenjing Zhang
A microcosm experiment was conducted to compare how different chelating agents enhance the phytoextraction of lead (Pb) by Mirabilis jalapa from an artificially Pb-contaminated soil. Chelating agents used included ethylene diamine tetraacetic acid (EDTA), nitrilotriacetic acid (NTA), ethylene diamine disuccinic acid (EDDS), oxalic acid, humic acid, citric acid and tartaric acid, with concentrations ranging from 0 to 2000 mg/kg. Results show that with increasing concentrations of chelating agents, the concentrations, bioaccumulation coefficients, and translocation factors of Pb in M...
June 23, 2017: Bulletin of Environmental Contamination and Toxicology
Wiktor Halecki, Sławomir Klatka
The goal of the study was to evaluate bioaccumulation of trace elements in plants grown in post-mining soils amended with the biosolids material. Phaseolus vulgaris was investigated on the laboratory scale, and a mixture of grasses, Melilotus albus, Beta vulgaris, Zea mays L. and Miscanthus × giganteus were evaluated on the field scale. The results of the research showed that P. vulgaris fertilized with the Carbocrash substrate was able to grow. In addition, growth was enhanced following stimulation with gibberellic acid...
June 23, 2017: Bulletin of Environmental Contamination and Toxicology
Huayun Yang, Weidong Li, Qi Liu
This study investigated the enantiomeric and depth profiles of organochlorine pesticides (OCPs) accumulated in the sediments of Qiandao Lake, China. OCP concentrations in sediments have increased gradually since the early 1960s, when extensive OCPs application in China began. Concentrations reached maximum levels after 1992, this timing corresponds with the emerging of the "new" usage of hexachlorocyclohexanes (HCHs) and dichlorodiphenyltrichloroethane (DDTs). In addition, the degradation of chiral OCPs were enantioselective, resulting in enriched (-)-enantiomers for α-HCH and o, p'-DDD...
June 22, 2017: Bulletin of Environmental Contamination and Toxicology
Marco R Hernandez, Nargis Ismail, Ken G Drouillard, Hugh J MacIsaac
The International Maritime Organization (IMO) will enforce a new abundance-based performance standard for ballast water in September, 2017. Strong oxidants, like chlorine, have been proposed as a method for achieving this standard. However chlorine treatment of ballast water can produce hazardous trihalomethanes. We assessed maximum trihalomethane production from one chlorine dose for three types of ballast water (fresh, brackish and marine) and three levels of total organic carbon (TOC) concentration (natural, filtered, enhanced)...
June 21, 2017: Bulletin of Environmental Contamination and Toxicology
Wenwen Gu, Ying Chen, Yu Li
Based on the experimental subcooled liquid vapor pressures (P L) of 17 polychlorinated naphthalene (PCN) congeners, one type of three-dimensional quantitative structure-activity relationship (3D-QSAR) models, comparative molecular similarity indices analysis (CoMSIA), was constructed with Sybyl software. Full factor experimental design was used to obtain the final regulation scheme for PCN, and then carry out modification of PCN-2 to significantly lower its P L. The contour maps of CoMSIA model showed that the migration ability of PCN decreases when the Cl atoms at the 2-, 3-, 4-, 5-, 6-, 7- and 8-positions of PCNs are replaced by electropositive groups...
June 21, 2017: Bulletin of Environmental Contamination and Toxicology
María Del Carmen Cuevas-Díaz, Dinora Vázquez-Luna, Sergio Martínez-Hernández, Oswaldo Guzmán-López, Angel I Ortíz-Ceballos
Contamination of soil with petroleum is common in oil-producing areas across the tropical regions of the world. There is limited knowledge on the sensitivity of endogeic tropical earthworms to the contamination of soil with total petroleum hydrocarbons (TPH) present in crude oil. Pontoscolex corethrurus is a dominant species in tropical agroecosystems around oil-processing facilities. The sensitivity of P. corethrurus to soil artificially contaminated with "Maya" Mexican heavy crude oil was investigated through avoidance and acute ecotoxicity tests, using the following measured concentrations: 0 (reference soil), 551, 969, 4845, 9991 and 14,869 mg/kg...
June 21, 2017: Bulletin of Environmental Contamination and Toxicology
Takeo Sakurai, Jun Kobayashi, Nozomi Ito, Shigeko Serizawa, Hiroaki Shiraishi, Tohru Yabe, Yuichi Ishii, Noriyuki Suzuki
We determined the respiratory uptake and depuration kinetics of perfluorooctanesulfonate (PFOS) in Perinereis wilsoni, a polychaete sandworm used as a model species to investigate the fate of chemical pollutants in coastal environments. The sandworms were kept in gravel-packed containers, and the water levels were varied cyclically to mimic the tides. We used seawater kept at 17.1°C. A 7-day exposure period was followed by a 9-day depuration period. The dissolved PFOS concentration averaged 28 ng/L during the exposure period...
June 20, 2017: Bulletin of Environmental Contamination and Toxicology
Tuncer Okan Genç, Fevzi Yilmaz
The concentrations of six metals (Hg, Cd, Cu, Pb, Cr and Zn) individual total metal load (IMBI) values and its relation to condition index were determined in water, sediment and tissues of crab (Callinectes sapidus) and two fish species (Mugil cephalus and Anguilla anguilla) inhabiting Köyceğiz Lagoon System. The average distribution of the IMBI values ranged from 0.033 to 0.265. Distribution patterns of IMBI in species follow the sequence: A. anguilla > M. cephalus > C. sapidus. Results showed that there are positive relationships between species sizes and metal levels in most cases...
June 13, 2017: Bulletin of Environmental Contamination and Toxicology
E Martínez-López, P Gómez-Ramírez, S Espín, M P Aldeguer, A J García-Fernández
The objective of this study was to assess metal exposure in the Mediterranean Pond Turtle (Mauremys leprosa) inhabiting a watercourse in an ancient mining district polluted by different metals ("Rambla de Las Moreras", southeastern Spain) and included in the Ramsar Convention. For this purpose, mercury (Hg), lead (Pb), copper (Cu), zinc (Zn) and cadmium (Cd) were analysed in blood samples from 42 M. leprosa healthy adults (27 males and 13 females). The highest median concentrations were found for Zn, followed by Cu, Pb, Hg and Cd (366, 33, 9, 0...
June 9, 2017: Bulletin of Environmental Contamination and Toxicology
Amund Maage, Bente M Nilsen, Kaare Julshamn, Livar Frøyland, Stig Valdersnes
Meat samples of 84 minke whales (Balaenoptera acutorostrata) mainly from the Barents Sea, collected between 1 May and 16 August 2011, were analyzed for total mercury, methylmercury, cadmium, lead, total arsenic, inorganic arsenic and selenium. The average total mercury concentration found was 0.15 ± 0.09 mg/kg, with a range from 0.05 to 0.49 mg/kg. The molar ratio of selenium to mercury varied between 1.0 and 10.3. Cadmium content ranged from 0.002 to 0.036 mg/kg, while the content of lead in whale meat ranged from <0...
June 2, 2017: Bulletin of Environmental Contamination and Toxicology
Şebnem Arslan, Çiğdem Yücel, Süleyman Selim Çallı, Mehmet Çelik
This study was carried out to assess the groundwater pollution in the northern Develi Closed Basin by using the heavy metal pollution index (HPI). Samples from 10 wells and 5 springs were collected in dry and wet seasons and concentrations of Pb, Zn, Cr, Mn, Fe, Cu, Cd, As and B were determined. In both seasons, for more than half of the samples, As, B and Fe concentrations exceeded the Turkish drinking water guideline values. Due to the occurrence of these metals in high concentrations in some samples HPI values are up to 1740...
June 2, 2017: Bulletin of Environmental Contamination and Toxicology
Hongli Tan, Changfeng Peng, Ying Guo, Xiaodong Wang, Yan Wu, Da Chen
House dust associated with organic pollutants is not only a potential source of pollutants to the outdoor environment, but also a source to human exposure. The present study investigated the occurrence and concentrations of organophosphate flame retardants (OPFRs) in house dust collected from South China dwellings (n = 20). The results revealed a universal presence of most target OPFRs in house dust, with concentrations of ΣOPFRs ranging from 2.06 to 19.95 μg/g. The median concentration of ΣOPFR (9...
June 1, 2017: Bulletin of Environmental Contamination and Toxicology
Ruiling Zhang, Ruijie Zhang, Shichun Zou, Ying Yang, Jun Li, Yinghui Wang, Kefu Yu, Gan Zhang
The occurrence and distribution of five selected fluoroquinolones (FQs) were studied in the Dongjiang River and the Beijiang River, South China. Ciprofloxacin, norfloxacin and enoxacin, used as human and veterinary medicines, were detected with detection frequencies of 75%-100% and average concentrations of 9.5-18.8 ng L(-1) in the two rivers. Meanwhile, enrofloxacin, which is only used as veterinary medicine, was detected at lower levels (2.9-4.0 ng L(-1)) than those of ciprofloxacin, norfloxacin and enoxacin...
May 29, 2017: Bulletin of Environmental Contamination and Toxicology
Elif Seda Koçoğlu, Sezgin Bakırdere, Seyfullah Keyf
A simple, green and fast analytical method was developed for the determination of sertraline in tap and waste water samples at trace levels by using supportive liquid-liquid extraction with gas chromatography-mass spectrometry. Different parameters affecting extraction efficiency such as types and volumes of extraction and supporter solvents, extraction period, salt type and amount were optimized to get lower detection limits. Ethyl acetate was selected as optimum extraction solvent. In order to improve the precision, anthracene-D10 was used as an internal standard...
May 29, 2017: Bulletin of Environmental Contamination and Toxicology
Sebastian Żmudzki, Natnael T Hamda, Patrycja Gibas-Tybur
The aim of the study was to determine the influence of migration on copper (Cu) kinetics of male Tribolium castaneum after 25 generations of exposure for Cu-adapted and non-Cu-adapted inbred lines. Adapted lines were kept on a flour medium contaminated with 1000 mg Cu kg(-1). A medium contaminated with 2000 mg Cu kg(-1) of copper was used during the intoxication phase. Based on our data and literature reports, we introduced a new two-phase four-stage toxicokinetics (TK) model. The intoxication phase was successfully divided into three stages with separate assimilation rate constant (ka) and elimination rate constant (ke) values...
May 26, 2017: Bulletin of Environmental Contamination and Toxicology
Tawfiq M Al Antary, Mahmoud A Alawi, Hussein Estityah, Nizar Haddad
One hundred samples of mother breast milk were gathered from six middle governorates and districts in Jordan in 2013/2014 to monitor Organochlorine pesticides pollutants. The results showed clearly that banned organochlorine pesticides are still detected in the monitored samples in low concentration despite banning of these persistent pollutants in Jordan since 36 years ago. However, the results indicated that 1% of the contaminated samples contained β-HCH, 5% γ-HCH, 3% p,p'-DDD, 2% heptachlor, 45% p,p'-DDE and 3% p,p'-DDT...
May 24, 2017: Bulletin of Environmental Contamination and Toxicology
Halis Boran, Serap Terzi
The present study evaluates potential toxic effects of bis(2-ethylhexyl) adipate (DEHA) plasticizer to larval (72 h post fertilization) zebrafish (Danio rerio) by analyzing changes in expression levels of stress-related genes (p53, rad51 and xrcc5) and assessing possible DNA damage of DEHA in larvae. The lethal concentration for 50% mortality (LC50) in larval zebrafish exposed for 96 h to 0-200 mg L(-1) DEHA was 89.9 ± 8.03 mg L(-1). A concentration-dependent increase in DNA strand breaks was detected in cells from larvae exposed for 96 h to DEHA...
May 24, 2017: Bulletin of Environmental Contamination and Toxicology
Anil K Tyor, Kanika Pahwa
The purpose of the present study was to evaluate the severity of pollution impact at two extreme sites of river Yamuna in Delhi region utilizing oxidative stress, genotoxic and histopathological biomarkers in gonad (ovary) of Clarias gariepinus. To evaluate oxidative stress, TBAR's and ferric reducing antioxidant power (FRAP) assay were employed while comet assay and classic histology were used to estimate genotoxicity and cellular damage respectively. The results indicated significant increase (p < 0...
May 23, 2017: Bulletin of Environmental Contamination and Toxicology
Raae Jung, Young Sang Ahn
This study aimed to determine mercury concentrations in tree rings and surface soils at distances of 4, 26 and 40 km from a fertilizer plant located in Yeosu City, Korea. Mercury concentrations in all tree rings were low prior to the establishment of the plant in 1977 and became elevated thereafter. The highest average mercury concentration in the tree rings was 11.96 ng g(-1) at the Yeosu site located nearest to the plant, with the lowest average mercury concentration of 4.45 ng g(-1) at the Suncheon site furthest away from the plant...
May 23, 2017: Bulletin of Environmental Contamination and Toxicology
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"