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Bulletin of Environmental Contamination and Toxicology

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https://read.qxmd.com/read/30770961/the-impact-of-sublethal-concentrations-of-treated-leachate-on-nile-til%C3%A3-pia-oreochromis-niloticus
#1
Michel Gallão, Karla G Gnocchi, Luciano R Carvalho, Bruno F Silva, Andressa N Barbosa, Adriana R Chippari-Gomes
The objective of this study was to evaluate the impact of sublethal concentrations of treated landfill leachate on Oreochromis niloticus individuals after exposure for 96 h, by assessing biochemical, genotoxic and immunologic biomarkers. Among biochemical biomarkers (activities of ALT, AST and GST enzymes), the treated landfill leachate did not cause significant alterations on O. niloticus and did not significantly affect leukocytes used as an immunologic biomarker. On the other hand, treated leachate induced genotoxic damages, since an increase in erythrocytic micronuclei and in DNA damage (comet assay) were observed in fish exposed to all treatment (2, 4 and 6 mL L-1 )...
February 15, 2019: Bulletin of Environmental Contamination and Toxicology
https://read.qxmd.com/read/30759262/health-risk-assessment-associated-with-abandoned-copper-and-uranium-mine-tailings
#2
Gica Pehoiu, Cristiana Radulescu, Ovidiu Murarescu, Ioana Daniela Dulama, Ioan Alin Bucurica, Sofia Teodorescu, Raluca Maria Stirbescu
This study aims to investigate the dose rate and pollution level of Ciudanovita, Lisava, Anina, and Moldova Noua mining tailing dumps. In order to accomplish this, soil samples were collected according to LUCAS 2009/2012, in the summer of 2017. To start with, these samples were measured in situ for dose rate and revealed some interesting aspects, following this, they were investigated in the laboratory using different physico-chemical methods for more complex data. Therefore, two techniques have been used for structural investigation that revealed some particularities in terms of morphology, color and shape (optical microscopy, scanning electron microscopy) and, two for chemical composition (Fourier transform infrared spectroscopy and inductive coupled plasma mass spectrometry), which provided the qualitative confirmation of chemical groups involved in soil composition along with the heavy and radioactive metals presence (i...
February 13, 2019: Bulletin of Environmental Contamination and Toxicology
https://read.qxmd.com/read/30756128/application-of-iron-based-materials-for-remediation-of-mercury-in-water-and-soil
#3
REVIEW
Yanyan Gong, Yao Huang, Mengxia Wang, Fangfei Liu, Tong Zhang
Mercury contamination in soil and water has become a major concern to environmental quality and human health. Among the existing remediation technologies for mercury pollution control, sorption via iron-based materials has received wide attention as they are environmental friendly and economic, and their reactivity is high and controllable through modulating the morphology and surface properties of particulate materials. This paper aimed to provide a comprehensive overview on environmental application of a variety of iron-based sorbents, namely, zero valent iron, iron oxides, and iron sulfides, for mercury remediation...
February 12, 2019: Bulletin of Environmental Contamination and Toxicology
https://read.qxmd.com/read/30741324/extraction-and-trace-analysis-of-trihalomethanes-in-water-samples-using-zein-fe-3-o-4-nanocomposite
#4
Fatemeh Hajilari, Khalil Farhadi, Habibollah Eskandari
This study presents a simple dispersive solid phase extraction (DSPE) technique combined with headspace thermal desorption (HSTD) for extraction and determination of the most significant trihalomethanes (THMs), bromodichloromethane, bromoform, chloroform and dibromochloromethane, in water samples by using Zein@Fe3 O4 nanocomposite coupled with gas chromatography/micro electron capture detection (GC-MECD). Various parameters affecting the DSPE-HSTD performance were investigated and optimized. The obtained results revealed that under optimum conditions, LOD and LOQ values were in the range of 0...
February 11, 2019: Bulletin of Environmental Contamination and Toxicology
https://read.qxmd.com/read/30739139/human-biological-monitoring-of-mercury-through-hair-samples-in-china
#5
REVIEW
Ping Li, Shuhui Guo, Jiating Zhao, Yuxi Gao, Yu-Feng Li
Mercury (Hg) is a global pollutant that affects environmental and human health. Considering the high toxicity of Hg, it is required to assess the exposure of Hg in human body for appropriate risk management. In this review paper, we summarized data obtained through regional and small-scaled human biomonitoring (HBM) program for Hg in hair samples in China, which can deliver scientific data to make decisions on environmental health policy. Besides, the major conclusions got from this study and perspectives for future works through these HBM program in China were presented...
February 9, 2019: Bulletin of Environmental Contamination and Toxicology
https://read.qxmd.com/read/30734841/speciation-distribution-and-risk-assessment-of-metals-in-sediments-from-a-water-body-replenished-by-effluent-from-a-wastewater-treatment-plant
#6
Nan Wang, Xiaochang C Wang, Honglei Liu, Yucong Zheng, Yan Zhang, Jiaqing Xiong, Pan Pan, Yanzheng Liu
To assess the status and risk of metal pollution in landscape water body replenished by wastewater treatment plant effluent, the distribution of metals in sediments from three regions [regulation pond (RP), wetland lake (WL), and main lake (ML)] of Harbor Lake, Tianjin, China, was characterized. Higher levels of all metals (except Cr and Pb) were observed in RP sediments. As, Cr, Cu, Ni, Pb, and Zn were mainly bound to organic matter and sulfide (F3) and residual fractions (F4), while the exchangeable and carbonate fraction (F1) and Fe/Mn oxide fraction (F2) were the dominant forms for Cd...
February 8, 2019: Bulletin of Environmental Contamination and Toxicology
https://read.qxmd.com/read/30734056/enantioselective-oxidative-stress-induced-by-s-and-rac-metolachlor-in-wheat-triticum-aestivum-l-seedlings
#7
Qian Qu, Mingjing Ke, Yizhi Ye, Qi Zhang, Tao Lu, Zhenyan Zhang, Haifeng Qian
The unfounded use of chiral pesticides has caused widespread concern. In this study, the enantioselective effects of S- and racemic (Rac)-metolachlor on the oxidative stress of wheat seedlings was determined based on physiological and gene transcription differences. Growth inhibition increased with increasing concentrations of tested metolachlor, and S-metolachlor had a stronger inhibitory effect than did Rac-metolachlor. Root growth was also significantly inhibited, but no enantioselective effects from the tested concentrations of the metolachlor enantiomers were observed...
February 7, 2019: Bulletin of Environmental Contamination and Toxicology
https://read.qxmd.com/read/30729251/trace-metal-contamination-and-risk-assessment-of-an-urban-river-in-limpopo-province-south-africa
#8
Ngonidzashe A G Moyo, Mmaditshaba M Rapatsa
Ecological and human health risk assessments were undertaken in an urban river, Sand River. Suitability of river water for irrigation was also determined. Samples were taken on a monthly basis from four sites. Site 1 was upstream of a sewage treatment plant, sites 2, 3 and 4 were downstream. The mean concentrations of trace metals in Sand River water after sewage effluent discharge followed the order Fe > Mn > Pb > Cu > Zn ≥ Cd. Trace metal concentrations in the sediment, grass and fish after discharge followed the order Fe > Mn > Zn > Cu > Pb > Cd...
February 7, 2019: Bulletin of Environmental Contamination and Toxicology
https://read.qxmd.com/read/30726511/caddisfly-assemblages-in-metal-contaminated-rivers-of-the-tikhaya-basin-east-kazakhstan
#9
Liubov V Yanygina, Anna A Evseeva
The Ulba river basin is one of the most industrialized regions of Kazakhstan. The development of mining and metallurgical industries has increased pollution of the basin's surface waters by heavy metals, primarily zinc and copper. The taxonomical structure of Trichoptera was studied in reference and impacted reaches of the river basin. A significant decrease in Trichoptera species richness was recorded in the most polluted areas. A total of 35 species were identified at the reference site of the Breksa River, but only 14 in the impacted sites...
February 6, 2019: Bulletin of Environmental Contamination and Toxicology
https://read.qxmd.com/read/30726510/effects-of-urban-rural-atmospheric-environment-on-heavy-metal-accumulation-and-resistance-characteristics-of-pinus-tabulaeformis-in-northern-china
#10
Ruirui Zhao, Tong Yang, Cong Shi, Meili Zhou, Guoping Chen, Fuchen Shi
The washed and unwashed current (C) and previous year (C + 1) needles, branches and top soils of Pinus tabulaeformis trees were sampled at five sites Haitai industrial district (HT), Puji River (PJ), Fukang road (FK), Residential area (RA) and Baxian Mountain (BX) in Tianjin along an urban-rural gradient and analyzed for heavy metals (Cu, Mn, Zn, Pb and Cd) concentrations via ICP. C + 1 needles generally had higher Mn, Pb, Cd than C needles while the opposite was for Cu and Zn. Total Cu, Zn, Pb, Cd in soils peaked at HT and decreased at RA and BX...
February 6, 2019: Bulletin of Environmental Contamination and Toxicology
https://read.qxmd.com/read/30725130/lead-pollution-and-isotope-tracing-of-surface-sediments-in-the-huainan-panji-coal-mining-subsidence-area-anhui-china
#11
Liugen Zheng, Xu Liu, Quan Tang, Jinping Ou
In this study, the provenance of anthropogenic lead, a major pollutant of surface sediments, was determined in Huainan Panji coal mining area. The lead concentrations and the pollution degree were investigated by the enrichment factor. Tessier five-step morphology extraction method was used to discuss its potential hazard. By comparing the lead isotope ratios of surface sediments and surrounding potential polluted end-members, the lead isotope ternary mixture model was appropriated to explore the sources and relative contribution fractions...
February 6, 2019: Bulletin of Environmental Contamination and Toxicology
https://read.qxmd.com/read/30725129/a-review-on-the-distribution-and-cycling-of-mercury-in-the-pacific-ocean
#12
REVIEW
Lufeng Chen, Yanbin Li
With the rapid development of economy in surrounding land, the Pacific Ocean is facing a number of serious environmental challenges, including mercury (Hg) pollution. Over the past several decades, a number of studies have been conducted on investigating the cycling of Hg in this ecosystem. This review summarizes recent studies on the distribution of Hg species in the water, sediment, and biota and the important processes controlling Hg cycling in the Pacific Ocean. Although a lot of studies have been conducted in this system, more efforts should be made on Hg speciation and cycling in the Pacific Ocean, especially some areas that have rarely studied so far...
February 6, 2019: Bulletin of Environmental Contamination and Toxicology
https://read.qxmd.com/read/30706079/is-hyalella-azteca-a-suitable-model-leaf-shredding-benthic-crustacean-for-testing-the-toxicity-of-sediment-associated-metals-in-europe
#13
Jochen P Zubrod, Dominic Englert, Alexander Feckler, Ricki R Rosenfeldt, Hendrik Pasternack, Henner Hollert, Thomas-Benjamin Seiler, Ralf Schulz, Mirco Bundschuh
The leaf-shredding crustacean Hyalella azteca, which is indigenous to Northern and Central America, is used to assess environmental risks associated with (metal-)contaminated sediments and to propose sediment quality standards also in Europe. Yet, it is unknown if H. azteca is protective for European crustacean shredders. We thus compared the sensitivity of H. azteca with that of the European species Asellus aquaticus and Gammarus fossarum towards copper- and cadmium-contaminated sediments (prepared according to OECD 218) under laboratory conditions employing mortality and leaf consumption as endpoints...
January 31, 2019: Bulletin of Environmental Contamination and Toxicology
https://read.qxmd.com/read/30688999/sub-lethal-responses-of-the-polychaete-armandia-agilis-in-whole-sediment-toxicity-testing
#14
Renan Vandre da Silva Toscano Saes, Lucas Buruaem Moreira, Tiago Farias Peres, Satie Taniguchi, Marcia Caruso Bícego, Rozane Valente Marins, Denis Moledo de Souza Abessa
The present study assessed biochemical responses as sublethal endpoints in the polychaete Armandia agilis exposed to contaminated sediments to in order to assess its potential use as a test organism. Sediment samples from several locations at a dredging site were obtained and used in whole-sediment exposures. Samples were tested with A. agilis to determine the 10-day toxicity of the 100% sample and the enzymatic activity of catalase (CAT), glutathione-S-transferase (GST) and acetylcholinesterase (AChE) biochemical measurements made in whole-body homogenates of a subset of the surviving organisms...
January 28, 2019: Bulletin of Environmental Contamination and Toxicology
https://read.qxmd.com/read/30683955/responses-of-nonprotein-thiols-to-stress-of-vanadium-and-mercury-in-maize-zea-mays-l-seedlings
#15
Ming Hou, Mingyuan Li, Xinhan Yang, Renbing Pan
The heavy metal pollution in ecosystems is of increasing global concern. This study investigated firstly the responses of phytochelatins (PCs), glutathione (GSH) and other nonprotein thiols (NPT) in maize seedlings under vanadium (V), mercury (Hg) or their combined stress. With V or V-Hg combined stress, the contents of PCs, GSH and NPT in shoots and roots both increased with increasing the V stress level, and reached the maximum when the V stress level was 5 mg/L. Accumulation of V in all organs of maize seedlings was in sequence as follows: roots ≫ shoots, while Hg inhibited the accumulation of V...
January 25, 2019: Bulletin of Environmental Contamination and Toxicology
https://read.qxmd.com/read/30683954/effect-of-chronic-exposure-to-methomyl-on-tissue-damage-and-apoptosis-in-testis-of-tilapia-oreochromis-niloticus-and-recovery-pattern
#16
Shun Long Meng, Tao Liu, Xi Chen, Li Ping Qiu, Geng Dong Hu, Chao Song, LiMin Fan, Yao Zheng, Jia Zhang Chen, Pao Xu
Tilapia were exposed to 0, 0.2, 2, 20, 200 µg/L methomyl for 30 days, and then transferred to methomyl-free water for 18 days. Caspase-8 in serum, apoptosis rate, microstructure and ultra-microstructure of testis were checked after methomyl exposure and at 18 days after transferring to methomyl-free water. There were no significant changes in Caspase-8 activity, apoptosis rate, and tissue structure in testis exposed to 0.2 and 2 µg/L compared with control. However, when tilapia exposed to 20 and 200 µg/L, the Caspase-8 activity and apoptosis rate were induced significantly, and tissue damage happened compared with the control...
January 25, 2019: Bulletin of Environmental Contamination and Toxicology
https://read.qxmd.com/read/30683953/lc-ms-ms-analysis-of-five-neonicotinoid-pesticides-in-sheep-and-cow-milk-samples-collected-in-jordan-valley
#17
Giorgio Fedrizzi, Alberto Altafini, Sara Armorini, Khaled Mefleh Al-Qudah, Paola Roncada
The purpose of the present study was to evaluate the presence of five neonicotinoid pesticides, acetamiprid, imidacloprid, clothianidin, thiacloprid, and thiamethoxam, in sheep and cow milk samples collected from animals bred in the Jordan Valley. In this area, numerous citrus plantations are present, and these insecticides are commonly used to protect plants from pests and diseases. Thirty-seven sheep milk samples and 31 cow milk samples were analysed. The analytical method, based on a single cleanup extraction step with SPE cartridges packed with diatomaceous earth material, together with analysis by LC-MS/MS, has guaranteed average recoveries between 75...
January 25, 2019: Bulletin of Environmental Contamination and Toxicology
https://read.qxmd.com/read/30673810/malachite-green-induced-ultrastructural-corneal-lesions-in-cyprinus-carpio-and-its-amelioration-using-emblica-officinalis
#18
Rajinder Jindal, Reshma Sinha
Malachite green, a multi-purpose dye induces cyto-toxicity upon its entry and bioaccumulation in tissues. A semi-static chronic (60 days) bioassay was conducted by exposing Cyprinus carpio to sublethal concentration of the dye and Emblica officinalis in four experimental groups viz control, malachite green, E. officinalis, and malachite green + E. officinalis. Effect of dye on the cornea was investigated considering ultra-structural alterations owing to its direct contact to the pollutant in the aquatic medium...
January 23, 2019: Bulletin of Environmental Contamination and Toxicology
https://read.qxmd.com/read/30671617/selenium-se-does-not-reduce-cadmium-cd-uptake-and-translocation-in-rice-oryza-sativa-l-in-naturally-occurred-se-rich-paddy-fields-with-a-high-geological-background-of-cd
#19
Bei-Bei Yang, Cheng Yang, Zong-Yuan Shao, Hao Wang, Shu-Ting Zan, Meng Zhu, Shou-Biao Zhou, Ru-Yi Yang
This study examined the selenium (Se) and cadmium (Cd) uptake by rice from soil and analyzed the relationship between Se and Cd in naturally occurred Se-rich paddy fields with a high geological background of Cd. Significant correlations were observed between soil Se and plant biomass Se, but not between soil Cd and plant biomass Cd. High concentrations of Cd were detected in rice plants and particularly in rice grains, suggesting potential health risks to human. Contrary to results from other previous studies, our results showed that high soil Se did not reduce Cd uptake by rice, although it decreased the availability of Cd in soil...
January 22, 2019: Bulletin of Environmental Contamination and Toxicology
https://read.qxmd.com/read/30666389/occurence-and-prioritization-of-pharmaceutical-active-compounds-in-domestic-municipal-wastewater-treatment-plants
#20
Ilda Vergili, Yasemin Kaya, Z Beril Gönder, Andrea Boergers, Jochen Tuerk
In this study, pharmaceutically active compounds (PhACs) were analyzed in the influent and effluent of a domestic wastewater treatment plant in Turkey and a municipal wastewater treatment plant in Germany and the toxicity of these wastewaters were estimated using a toxic unit (TU) approach. A total of 21 and 32 PhACs were detected in the domestic wastewater and the municipal wastewater, respectively. The TUs estimated for PhACs in municipal wastewater were higher than the TUs estimated for PhACs present in domestic wastewater...
January 21, 2019: Bulletin of Environmental Contamination and Toxicology
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