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Ecotoxicology and Environmental Safety

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https://www.readbyqxmd.com/read/29156432/the-effects-of-human-drugs-in-corbicula-fluminea-assessment-of-neurotoxicity-inflammation-gametogenic-activity-and-energy-status
#1
G V Aguirre-Martínez, C André, F Gagné, L M Martín-Díaz
The constant release of pharmaceuticals products to aquatic environment even at low concentrations (ng L(-1) to µg L(-1)) could lead to unknown chronic effects to non-target organisms. The aim of this study was to evaluate neurotoxic responses, inflammation, gametogenic activity and energy status on the fresh water clam C. fluminea after exposure to different concentrations of caffeine (CAF), ibuprofen (IBU), carbamazepine (CBZ), novobiocin (NOV) and tamoxifen (TMX) for 21 days under laboratory conditions...
November 17, 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/29156308/modulatory-effects-of-green-tea-extract-against-the-hepatotoxic-effects-of-4-nonylphenol-in-catfish-clarias-gariepinus
#2
A H Sayed, Hamdy A M Soliman
The antioxidant role of the green tea (Camellia sinensis) extract (GTE) was examined to remedy the toxic effects of (0.2mgl(-1)) 4-nonylphenol(4-NP). Biochemical parameters, antioxidant enzymes, liver lipid peroxidation (LPO), DNA fragmentation, and apoptosis as well as histopathology of liver of African catfish Clarias gariepinus were considered. Catfishes were divided into four groups: first group (control), second group (0.2mgl(-1) of 4-NP), third group (0.2mgl(-1)of 4-NP +100mg GTE l(-1)water), and fourth group (0...
November 17, 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/29156307/gum-xanthan-psyllium-cl-poly-acrylic-acid-co-itaconic-acid-based-adsorbent-for-effective-removal-of-cationic-and-anionic-dyes-adsorption-isotherms-kinetics-and-thermodynamic-studies
#3
Sukriti Chaudhary, Jitender Sharma, Balbir S Kaith, Satender Yadav, Ashish Kumar Sharma, Aayushi Goel
The present work highlights the synthesis of the adsorbent based on Gum xanthan-psyllium hybrid backbone graft co-polymerized with polyacrylic acid-co-polyitaconic acid chains for the rapid sequestration of auramine-O (Aur-O) and eriochrome black-T (EBT) dyes from the aqueous fluid. The excellent dye removal efficiency of 90.53% for EBT and 95.63% for Aur-O was found at initial dye concentration of 30mgL(-1) (EBT) and 15 mgL(-1) (Aur-O) 40mL(-1) with an adsorbent dose of 600mg within time duration of 5h and 323K temp...
November 17, 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/29156306/effect-of-microcystins-on-root-growth-oxidative-response-and-exudation-of-rice-oryza-sativa
#4
Qing Cao, Richard R Rediske, Lei Yao, Liqiang Xie
A 30 days indoor hydroponic experiment was carried out to evaluate the effect of microcystins (MCs) on rice root morphology and exudation, as well as bioaccumulation of MCs in rice. MCs were bioaccumulated in rice with the greatest concentrations being observed in the leaves (113.68μgg(-1) Fresh weight (FW)) when exposed to 500μgL(-1) MCs. Root activity at 500μgL(-1) decreased 37%, compared to the control. MCs also induced disruption of the antioxidant system and lipid peroxidation in rice roots. Root growth was significantly inhibited by MCs...
November 17, 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/29156305/effect-of-dietary-supplementation-with-spirulina-platensis-on-atrazine-induced-oxidative-stress-mediated-hepatic-damage-and-inflammation-in-the-common-carp-cyprinus-carpio-l
#5
Hosam Toughan, Samah R Khalil, Ashraf Ahmed El-Ghoneimy, Ashraf Awad, A Sh Seddek
The present study evaluated the potential modulatory effect(s) of dietary supplementation with Spirulina platensis (SP) on Atrazine (ATZ)-induced oxidative stress and inflammation in common carp (Cyprinus carpio L.). Common carp was exposed to ATZ (428μg/L) and SP (1%), either alone or in combination, for 40 days. Subsequently, the treatment groups were evaluated for ATZ-induced oxidative stress-mediated hepatic damage and the potential antioxidant effect(s) of SP supplementation. The results indicated that ATZ exposure led to a significant increase in the oxidative stress as suggested by the increased levels of lipid and DNA oxidative damage markers and the significant decline of antioxidant status biomarkers...
November 17, 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/29156304/water-management-regimes-alter-pb-uptake-and-translocation-in-fragrant-rice
#6
Umair Ashraf, Saddam Hussain, Nadeem Akbar, Shakeel Ahmad Anjum, Waseem Hassan, Xiangru Tang
Rice cultivation in lead (Pb) polluted soils often leads to high Pb contents in rice grains. The present study investigated the dynamics of Pb uptake under different water regimes in two fragrant rice cultivars i.e., Guixiangzhan and Nongxiang-18. Results revealed that water dynamics regulated the antioxidant activities in both rice cultivars under Pb toxicity. Compared to continuous ponding (CP), taken as control, alternate wetting and drying (AWD) reduced the Pb contents in roots, stems, leaves, and grains up to 17%, 41%, 22%, and 52% in Guixiangzhan and 23%, 19%, 17%, and 37% in Nongxiang-18, respectively...
November 17, 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/29156303/assessment-of-nickel-bioavailability-through-chemical-extractants-and-red-clover-trifolium-pratense-l-in-an-amended-soil-related-changes-in-various-parameters-of-red-clover
#7
Ali Khan Shahbaz, Muhammad Iqbal, Abdul Jabbar, Sabir Hussain, Muhammad Ibrahim
Application of immobilizing agents may efficiently reduce the bioavailability of nickel (Ni) in the soil. Here we report the effect of biochar (BC), gravel sludge (GS) and zeolite (ZE) as a sole treatment and their combinations on the bioavailability of Ni after their application into a Ni-polluted soil. The bioavailability of Ni after the application of immobilizing agents was assessed through an indicator plant (red clover) and chemical indicators of bioavailability like soil water extract (SWE), DTPA and Ca(NO3)2 extracts...
November 17, 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/29154140/mouthpart-deformities-in-chironomidae-diptera-as-bioindicators-of-heavy-metals-pollution-in-shiroro-lake-niger-state-nigeria
#8
Francis O Arimoro, Yohanna I Auta, Oghenekaro N Odume, Unique N Keke, Adamu Z Mohammed
In this study, mouthpart deformities in Chironomid larvae (Diptera) were investigated in relation to sediment contamination in the Shiroro Lake in Nigeria. Metals and chironomids were sampled monthly at three stations (A-C) between August 2013 and January 2014. Across the stations, zinc ranged (3.9-75mg/g), manganese (1.29-1.65mg/g), lead (0.00-0.10mg/g), iron (101-168mg/g) and copper (0.13-0.17mg/g). The metal ions did not differ significantly (P > 0.05) between the sampling stations. However, zinc and iron ions were significantly different between the sampling seasons (P < 0...
November 16, 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/29154139/perfluorinated-compounds-in-surface-waters-of-shanghai-china-source-analysis-and-risk-assessment
#9
Rui Sun, Minghong Wu, Liang Tang, Jiajun Li, Zhaoqiu Qian, Tao Han, Gang Xu
17 perfluorinated compounds (PFCs) were systematically investigated in the surface water from principal watersheds of Shanghai, China. 10 PFCs were above the detection limit (0.08-0.28ng/L) in 39 surface water samples. The perfluorooctanoic acid (PFOA) and perfluorobutanesulfonate (PFBS) were the two dominant compounds with a median concentration 50.67ng/L and 29.84ng/L, respectively. Concentrations of perfluorooctanesulfonate (PFOS) were generally less than PFBS, which might result from the global phase-out of PFOS production and the use of PFBS as a substitute for PFOS-based products...
November 16, 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/29154134/validation-of-a-biotic-ligand-model-on-site-specific-copper-toxicity-to-daphnia-magna-in-the-yeongsan-river-korea
#10
Jinhee Park, Jin-Sung Ra, Hojung Rho, Jaeweon Cho, Sang Don Kim
The objective of this study was to determine whether the water effect ratio (WER) or biotic ligand model (BLM) could be applied to efficiently develop water quality criteria (WQC) in Korea. Samples were collected from 12 specific sites along the Yeongsan River (YSR), Korea, including two sewage treatment plants and one estuary lake. A copper toxicity test using Daphnia magna was performed to determine the WER and to compare to the BLM prediction. The results of the WER from YSR samples also indicated significantly different copper toxicities in all sites...
November 16, 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/29154133/signaling-molecule-methylglyoxal-ameliorates-cadmium-injury-in-wheat-triticum-aestivum-l-by-a-coordinated-induction-of-glutathione-pool-and-glyoxalase-system
#11
Zhong-Guang Li, Qian Nie, Cong-Li Yang, Yue Wang, Zhi-Hao Zhou
Methylglyoxal (MG) now is found to be an emerging signaling molecule. It can relieve the toxicity of cadmium (Cd), however its alleviating mechanism still remains unknown. In this study, compared with the Cd-stressed seedlings without MG treatment, MG treatment could stimulate the activities of glutathione reductase (GR) and gamma-glutamylcysteine synthetase (γ-ECS) in Cd-stressed wheat seedlings, which in turn induced an increase of reduced glutathione (GSH). Adversely, the activated enzymes related to GSH biosynthesis and increased GSH were weakened by N-acetyl-L-cysteine (NAC, MG scavenger), 2,4-dihydroxy-benzylamine (DHBA) and 1,3-bischloroethyl-nitrosourea (BCNU, both are specific inhibitors of GR), buthionine sulfoximine (BSO, a specific inhibitors of GSH biosynthesis), and N-ethylmaleimide (NEM, GSH scavenger), respectively...
November 16, 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/29154138/preparation-of-biochar-from-enteromorpha-prolifera-and-its-use-for-the-removal-of-polycyclic-aromatic-hydrocarbons-pahs-from-aqueous-solution
#12
Kaili Qiao, Weijun Tian, Jie Bai, Jie Dong, Jing Zhao, Xiaoxi Gong, Shuhui Liu
EP-biochar was produced from Enteromorpha prolifera (EP) at temperatures of 200-600°C under limited-oxygen conditions and then activated using HCl and HF. To optimize the sorption of pyrene (PYR) and benzo[a]pyrene (BaP), the effect of the pyrolysis temperature was studied, and the results showed that EP-biochar produced at 500°C gave the highest removal efficiency. The physiochemical properties of EP-biochar pyrolyzed at 500°C were characterized. The examination indicated that the surface area of EP-biochar was 205...
November 15, 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/29154137/the-ecotoxicity-of-binary-mixtures-of-imazamox-and-ionized-ammonia-on-freshwater-copepods-implications-for-environmental-risk-assessment-in-groundwater-bodies
#13
Walter D Di Marzio, Marco Cifoni, María E Sáenz, Diana M P Galassi, Tiziana Di Lorenzo
Groundwater bodies are impacted by substances such as pesticides and N-fertilizers, which usually occur in the environment as complex mixtures rather than isolated pollutants. The threat that these mixtures pose to groundwater-dwelling organisms is still poorly understood. The aims of the present study were to test the acute effect of a binary mixture of a herbicide (Imazamox) and NH4(+) on epigean (Eucyclops serrulatus) and hypogean (Diacyclops belgicus) freshwater copepod species. In addition, to evaluate if the effect of the mixture can be explained by referencing non-interaction models or by more complex interaction models; and the implications for groundwater risk assessment...
November 15, 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/29154136/transcriptional-activity-of-detoxification-genes-is-altered-by-ultraviolet-filters-in-chironomus-riparius
#14
José-Luis Martínez-Guitarte
Ultraviolet (UV) filters are compounds used to prevent the damage produced by UV radiation in personal care products, plastics, etc. They have been associated with endocrine disruption, showing anti-estrogen activity in vertebrates and altering the ecdysone pathway in invertebrates. Although they have attracted the attention of multiple research teams there is a lack of data about how animals activate detoxification systems, especially in invertebrates. Here, analysis of the effects of two UV filters, benzophenone-3 (BP3) and 4-methylbenzylidene camphor (4MBC), on the transcriptional activity of nine genes covering the three steps of the detoxification process has been performed...
November 15, 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/29154135/acute-exposure-to-sunscreen-containing-titanium-induces-an-adaptive-response-and-oxidative-stress-in-mytillus-galloprovincialis
#15
Antoni Sureda, Xavier Capó, Carla Busquets-Cortés, Silvia Tejada
The use of sunscreens to protect against ultraviolet radiation exposure progressively increases as result of a greater awareness of the people and the greater arrival of tourists. The components of these creams can end up in the waters affecting coastal species. Mediterranean mussels (Mytillus galloprovincialis) were subjected to an acute exposure of a sunscreen with TiO2 in their composition during 24h. The low and medium concentrations used in the assays contained a concentration of TiO2 in the range of values found in coastal waters of the Balearic Islands...
November 15, 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/29149662/in-ovo-transformation-of-two-emerging-flame-retardants-in-japanese-quail-coturnix-japonica
#16
Nathalie Briels, Mari E Løseth, Tomasz M Ciesielski, Govindan Malarvannan, Giulia Poma, Sara A Kjærvik, Alexis Léon, Ronan Cariou, Adrian Covaci, Veerle L B Jaspers
Tris(1,3-dichloro-2-propyl) phosphate (TDCIPP) and Dechlorane Plus (DP) are two chlorinated, alternative flame retardants that have been found in wild birds and bird eggs. Little is known about the fate and effect of these compounds in birds, especially during the vulnerable stages of embryonic development. To investigate the ability of birds to biotransform these compounds, an in ovo exposure experiment with Japanese quail eggs was performed. Quail eggs were injected in the yolk sac with 1000ng/g egg of TDCIPP (2...
November 14, 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/29149661/unraveling-the-effects-of-arbuscular-mycorrhizal-fungus-on-uptake-translocation-and-distribution-of-cadmium-in-phragmites-australis-cav-trin-ex-steud
#17
Xiaochen Huang, Li Wang, Shishu Zhu, Shih-Hsin Ho, Jieting Wu, Prasanta K Kalita, Fang Ma
Phragmites australis (Cav.) Trin. ex Steud. has been reported to form a symbiosis with arbuscular mycorrhizal fungus (AMF). However, the tolerance mechanism for AMF symbiosis on cadmium (Cd) phytotoxicity still remains unclear. In this study, we investigated the effects of Rhizophagus irregularis inoculation on Cd-stressed (0, 1, and 20mgL(-1)) roots, stems, and leaves of P. australis with regard to subcellular Cd distribution and chemical forms of Cd. In addition, transmission electron microscopy and Fourier transform infrared spectroscopy were used to investigate variations in subcellular structures and functional groups in plant organs...
November 14, 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/29149660/a-systems-level-approach-for-investigating-organophosphorus-pesticide-toxicity
#18
Jingbo Zhu, Jing Wang, Yan Ding, Baoyue Liu, Wei Xiao
The full understanding of the single and joint toxicity of a variety of organophosphorus (OP) pesticides is still unavailable, because of the extreme complex mechanism of action. This study established a systems-level approach based on systems toxicology to investigate OP pesticide toxicity by incorporating ADME/T properties, protein prediction, and network and pathway analysis. The results showed that most OP pesticides are highly toxic according to the ADME/T parameters, and can interact with significant receptor proteins to cooperatively lead to various diseases by the established OP pesticide -protein and protein-disease networks...
November 14, 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/29145163/spread-of-multidrug-resistant-escherichia-coli-harboring-integron-via-swine-farm-waste-water-treatment-plant
#19
Jin-Hyeong Park, Young-Ji Kim, Binn-Kim, Kun-Ho Seo
Wastewater treatment plants (WWTPs) that release treated wastewater into the environment have emerged as a major threat to public health. In this study, we investigated Escherichia coli load and antibiotic-resistance profiles across different treatment processes at a swine farm WWTP. The frequency of the detection of class 1 and 2 integrons, and their association with antibiotic resistance, were also analyzed. Samples were obtained at each of five sampling sites that represented each processing step within the WWTP...
November 13, 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/29145162/biomonitoring-based-exposure-assessment-of-benzene-toluene-ethylbenzene-and-xylene-among-workers-at-petroleum-distribution-facilities
#20
Behzad Heibati, Krystal J Godri Pollitt, Jamshid Yazdani Charati, Alan Ducatman, Mohammad Shokrzadeh, Ali Karimi, Mahmoud Mohammadyan
Elevated emissions of volatile organic compounds, including benzene, toluene, ethylbenzene, and o, p, and m-xylenes (BTEX), are an occupational health concern at oil transfer stations. This exploratory study investigated personal exposure to BTEX through environmental air and urine samples collected from 50 male workers at a major oil distribution company in Iran. Airborne BTEX exposures were evaluated over 8h periods during work-shift by using personal passive samplers. Urinary BTEX levels were determined using solid-phase microextraction with gas chromatography mass spectrometry for separation and detection...
November 13, 2017: Ecotoxicology and Environmental Safety
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