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... Freshwater mussels are used as an effective bioindicator of metal pollution. There is no data on the accumulation of any metal-oxide nanoparticles (NPs) in tissues of Unio tigridis. Thus, this study was undertaken to investigate accumulation of Al₂O₃, CuO, and TiO₂ NPs following exposure to different concentrations (0, 1, 3, and 9 mg/L) of NPs for 14 days. Metal concentrations in tissues were dete ...
Mayra A. Cañizares-Martínez; Mercedes Quintanilla-Mena; Marcela Del-Río-García; Isajav Rivas-Reyes; María V. Patiño-Suárez; Victor M. Vidal-Martínez; M. Leopoldina Aguirre-Macedo; Carlos A. Puch-Hau
... In this study, we report molecular and metabolic responses of Sciaenops ocellatus during an acute oil exposure bioassay (100, 800 and 8000 mg 1–¹ of crude oil). The global DNA methylation and expression profiles of key genes of the xenobiotic biotransformation system (cytochrome P450 1A [cyp1a] and glutathione S-tranferase [gst]), oxidative stress system (glutathione peroxidase [gpx], catalase [ca ...
... Oxaziclomefone is an organic heterocyclic herbicide which has been widely used in rice fields. The aim of this paper is to investigate the adsorption–desorption and migration of oxaziclomefone in four Chinese agricultural soils. All the four soils show high adsorption capacity for oxaziclomefone, with similar adsorption rates at 84.48%–96.70%. Four adsorption kinetic models were used to fit the ad ...
... In aquatic life, environmental chemicals are accumulated by mussels due to their sentinel nature and filter-feeding characteristics. Herein, the present study focused on assessing the concentrations of Cu, Zn, Mg, Mn, Fe, Cd, Pb, Ca, K, and Na levels in freshwater mussels (Unio elangatulus eucirrus) depending on sex and age. For all trace metals, some important differences of bioaccumulations were ...
... Antibiotic compounds can enter the environment and eventually into drinking water, when manure containing non-metabolized antibiotic residues is applied to agricultural land. In this study, the publication data was analyzed from the aspects of countries, subject categories and keywords during the period of 1946–2016 from Web of Science. The results indicated that, during the period of 2004–2016, t ...
Apium; celery; chlorfenapyr; food safety; gas chromatography; greenhouses; half life; pollution; spectrometers; toxicology; China
Abstract:
... The degradation kinetics and migration pattern of chlorfenapyr in celery and soil at Lhasa and Pengzhou were investigated. A simple, rapid analytical method for the quantification of chlorfenapyr in celery and soil was developed using gas chromatography-tandem mass spectrometer. The results indicated that the half-lives of chlorfenapyr in celeries and soils at Lhasa were 6.3 days and 12.8 days. Wh ...
... The prevention of acid generation from sulfidic mine wastes is a problem that challenges the global scientific community for decades. A promising strategy is related to the formation of coating layer around sulfides for inhibiting surface oxidation. In the current research, the conditions favoring the formation of an efficient silicate-based coating around pyrite and arsenopyrite were studied, usi ...
... Phosphatic clays, one type of phosphorite industry wastes, could induce environmental issues and geological disasters when they are piled in the open air. Previous research demonstrated that phosphatic clays usually exhibit poor performance in heavy metal immobilization mostly due to low phosphate content. Thus, phosphatic clays could not be applied in practical heavy metal remediation without pre ...
... Despite the importance of reptiles in agroecosystems, little is known about the effects of agricultural intensification and pesticide use on these animals. We compared antioxidant and haematological biomarkers in the wild Italian wall lizards Podarcis siculus from three olive groves representing a gradient of management intensity. Lizards from the conventional grove showed induced antioxidant defe ...
María Magdalena Uribe-Flores; Ulises García-Cruz; Emanuel Hernández-Nuñez; Daniel Cerqueda-García; M. Leopoldina Aguirre-Macedo; José Q. García-Maldonado
... Degradation efficiency of a heavy crude oil by a marine microbial consortium was evaluated in this study, with and without the addition of a chemical dispersant (Nokomis 3-F4). 15.50% of total petroleum hydrocarbons (TPH) were removed after 15 days of incubation without dispersant, with a degradation rate of 2.39 ± 0.22 mg L⁻¹ day⁻¹. In contrast, the addition of Nokomis 3-F4 increased TPH degradat ...
air quality; benzene; ethylbenzene; gasoline; pollution; residential areas; toluene; toxicology; xylene; Brazil
Abstract:
... The Metropolitan Region of Rio de Janeiro is the second largest urban and industrial region in Brazil. While the south and south-east areas are affected by vehicular emissions, the districts and cities located in the northern area are subjected to industrial emissions and have the poorest air quality of the region. In this study, BTEX concentrations were determined in the District of Irajá, a resi ...
... This study reports the implications of silver nanoparticles (AgNPs) and cow-dung contamination on water quality and oxidative perturbations in antioxidant biomarkers in the exposed Clarias gariepinus. Sixteen samples of C. gariepinus were exposed to fresh-water, 0.75 mg/mL each of AgNPs, cow-dung and a mixture of AgNPs-cow dung dosed water for 10 days. Cow-dung significantly (p < 0.05) depleted di ...
bioavailability; fulvic acids; ion exchange; neodymium; particle size; pollution; toxicology
Abstract:
... It has been well known that the free ion concentration of metals plays a vital role in metal bioavailability. However, measurement of this fraction is still not easy over years of development. Nowadays, rare earth elements (REEs) are drawing more attentions as an emerging contaminant due to their wide applications in our daily life. To analyze the free ion concentration of neodymium (Nd), we adopt ...
... Polycyclic aromatic hydrocarbons (PAHs) are persistent toxic substances that have ubiquitous presence in water, air, soil, and sediment environments. The growth of PAH toxicities and related ecotoxicology risk in estuary sediment has a serious concern. Present study examined the PAHs concentration, sources, and ecological risk from selected sites in Subarnarekha River estuary (SRE) sediment deposi ...
Larissa Souza Passos; Gabriel Carvalho Coppo; Tatiana Miura Pereira; Barbara Chisté Teixeira; Alliny Magalhães Bona; Julia Merçon; Taciana Onesorge Miranda Lopes; Adriana Regina Chippari-Gomes
... The present study aimed to evaluate the toxicity of the association between Fe and Mn in Oreochromis niloticus through genotoxic (micronucleus test and comet assay) and biochemical (CAT and GST enzymes) assays. The tested treatments were T1 = control group (without metal addition), T2 = 2.60 mg L⁻¹ of Fe + 0.2 mg L⁻¹ of Mn, and T3 = 4.40 mg L⁻¹ of Fe + 3.49 mg L⁻¹ of Mn, during 96-h bioassays. All ...
... Soil pollution by metal(loid)s is an important issue in Europe, as it causes environmental and health problems. Therefore, remediation of these areas is needed. The success of phytoremediation process will depend on the ability of plants to implement, which can require the addition of amendments to the soil in order to improve soil conditions, immobilize pollutant and thus ameliorate plant growth. ...
Sébastien Putzeys; Miryam Juárez-Fonseca; Sonia S. Valencia-Agami; Armando Mendoza-Flores; Daniel Cerqueda-García; Ana C. Aguilar-Trujillo; Manuel E. Martínez-Cruz; Yuri B. Okolodkov; Flor Arcega-Cabrera; Jorge A. Herrera-Silveira; M. Leopoldina Aguirre-Macedo; Daniel Pech
Bacillariophyceae; Chlorophyceae; Dinophyceae; community structure; oil spills; petroleum; phytoplankton; pollution; salinity; temperature; toxicology; Gulf of Mexico; Mexico
Abstract:
... Oiling scenarios following spills vary in concentration and usually can affect large coastal areas. Consequently, this research evaluated different crude oil concentrations (10, 40, and 80 mg L⁻¹) on the nearshore phytoplanktonic community in the southern Gulf of Mexico. This experiment was carried out for ten days using eight units of 2500 L each; factors monitored included shifts in phytoplankto ...
... The present study assessed the utility of Allium cepa based cyto-genotoxicity bioassays in evaluating the arsenic toxicity and remediation potential of Pteris vittata on contaminated soil of Lakhimpur-Kheri district. Untreated and P. vittata treated soil extracts were used for cyto-genotoxicity tests in A. cepa. Results showed that P. vittata extracted high concentration of arsenic, which ranged f ...
Juan José Sandoval-Gío; Ángel Gabriel Polanco-Rodríguez; Jesús Alfredo Araujo-León; Mateo Israel Burgos-Díaz; Beatriz Yáñez-Rivera; Juan Candelero-de la Cruz
Limulus polyphemus; arthropods; bioaccumulation; conservation areas; environmental impact; glyphosate; high performance liquid chromatography; spectrometers; toxicology; water pollution; wildlife; Mexico
Abstract:
... Glyphosate is the most used herbicide in the world. Unfortunately, contamination of water bodies by this herbicide has been reported. A severe concern has been triggered given its detrimental impact on the environment and wildlife. The American horseshoe crab (Limulus polyphemus) is a benthic arthropod that inhabits the Yucatan Peninsula in Southeast Mexico. This study evaluates the glyphosate con ...
Omar Cruz-Santiago; Claudia G. Castillo; Guillermo Espinosa-Reyes; Iván N. Pérez-Maldonado; Donaji J. González-Mille; María del Carmen Cuevas-Díaz; César A. Ilizaliturri-Hernández
... The lower basin of Coatzacoalcos River is one of the most polluted regions of the southern Gulf of Mexico. Organochlorine compounds, polybrominated diphenyl ethers, polycyclic aromatic hydrocarbons, and heavy metals have been registered in this region. In the present study, genotoxicity was evaluated in the blood of giant toads (Rhinella marina) from Coatzacoalcos’ rural and industrial zones, and ...