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Ecotoxicology and Environmental Safety

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https://www.readbyqxmd.com/read/30641318/exposure-and-ecological-risk-of-phthalate-esters-in-the-taihu-lake-basin-china
#1
Xiangyun Gao, Ji Li, Xiaonan Wang, Junli Zhou, Bo Fan, Wenwen Li, Zhengtao Liu
The environmental spatial distribution and exposure risk of 6 phthalate esters (PAEs) including dimethyl phthalate (DMP), diethyl phthalate (DEP), butyl benzyl phthalate (BBP), di-n-octyl phthalate (DnOP), bis(2-ethylhexyl) phthalate (DEHP), and dibutyl phthalate (DBP), in surface water and sediment of Taihu Lake basin, China, were investigated at 65 sites. The exposure concentrations of 6 PAEs (∑6PAEs) detected in the samples spanned a range of 0.740-13.0 μg/L in surface water and 5.15-20.9 mg/kg in sediment...
January 11, 2019: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/30641317/evaluation-of-the-potential-for-caesium-transfer-from-contaminated-soil-to-the-food-chain-as-a-consequence-of-uptake-by-edible-vegetables
#2
Daniela De Medici, Dana Komínková, Marco Race, Massimiliano Fabbricino, Lucie Součková
This paper analyzes the effect of caesium (Cs) concentration on seed germination, seedling growth, root uptake, and leaf uptake of Lactuca sativa to understand the potential transfer of the metal from contaminated soil to humans through the food chain. The results of germination experiments show that seed germination and seedling growth strongly depend on increasing Cs concentration, with a decrease in the number of germinated seeds compared to the control up to 13.6% and a reduction in seedling growth up to 10...
January 11, 2019: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/30641316/mutagenicity-of-indoor-air-pollutants-adsorbed-on-spider-webs
#3
Radosław Rutkowski, Justyna Rybak, Wioletta Rogula-Kozłowska, Maciej Bełcik, Katarzyna Piekarska, Izabela Jureczko
In this study, air pollutants were determined on spider webs collected from six indoor sites in the Lower Silesia region, southwest Poland. In order to assess the mutagenicity (M) of the collected samples, the standard Salmonella assay was used with two Salmonella typhimurium strains, TA98 and YG1041. The assays were conducted with and without metabolic activation (S9 mix). The presence of 15 polycyclic aromatic hydrocarbons (PAHs) and PAH-derivatives (nitro-PAHs; NPAHs) on spider webs was also assessed at the studied sites...
January 11, 2019: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/30641315/use-of-plant-growth-promoting-rhizobacteria-pgpr-and-mycorrhizae-to-improve-the-growth-and-nutrient-utilization-of-common-bean-in-a-soil-infected-with-white-rot-fungi
#4
Ibrahim Mohamed, Khaled E Eid, Mohamed H H Abbas, Ahmed A Salem, Nevin Ahmed, Maha Ali, Ghulam Mustafa Shah, Chen Fang
Extensive use of fertilizers and pesticides led to dangerous ecological effects and therefore the biological approaches have been widely recommended to prevent further deterioration for the environment. The current study was conducted to explore the potentiality of using single or combined inoculations by mycorrhizae, Bacillus subtilis and Pseudomonas fluorescence for controlling the infection of common bean plants with Sclerotium rolfsii on one hand and as bio-fertilizers for improving plants nutritional status on the other hand...
January 11, 2019: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/30641314/the-toxicity-of-exogenous-arsenic-to-soil-dwelling-springtail-folsomia-candida-in-relation-to-soil-properties-and-aging-time
#5
Xianglong Lin, Zaijin Sun, Long Zhao, Jin Ma, Xing Li, Fei He, Hong Hou
Arsenic (As) is a toxic metalloid, but studies on As toxicity to soil-dwelling springtails are fairly limited, and did not consider the effects of various soil properties and long aging time. To address this, the toxicity of As to model organism-Folsomia candida were evaluated in the laboratory studies. The results showed that compared to the soils aged only for 15 d, the concentrations inhibiting 50% reproduction (EC50 ) significantly increased by 1.3- to 2.0-fold in four soils aged for 150 d, the concentrations causing 50% mortality (LC50 ) were higher than the highest test concentration in the most soils...
January 11, 2019: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/30641313/enhanced-electrokinetic-remediation-of-manganese-and-ammonia-nitrogen-from-electrolytic-manganese-residue-using-pulsed-electric-field-in-different-enhancement-agents
#6
Jiancheng Shu, Xiaolong Sun, Renlong Liu, Zuohua Liu, Haiping Wu, Mengjun Chen, Bobo Li
Electrolytic manganese residue (EMR) is a solid waste generated in the process of producing electrolytic metal manganese and contains a lot of manganese and ammonia nitrogen. In this study, electrokinetic remediation (EK) of manganese and ammonia nitrogen from EMR were carried out by using pulse electric field (PE) in different agents, and sodium dodecyl benzene sulfonate (SDBS), citric acid (CA) and ethylene diamine tetraacetic acid (EDTA) were used as enhancement agents. The removal behavior of ammonia nitrogen and manganese under direct current field (DC) and PE, and the relationship between manganese fractionation and transport behavior, as well as the energy consumption were investigated...
January 11, 2019: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/30641312/assessment-of-pm-2-5-monitoring-using-micropem-a-validation-study-in-a-city-with-elevated-pm-2-5-levels
#7
Yanjun Du, Qin Wang, Qinghua Sun, Ting Zhang, Tiantian Li, Beizhan Yan
Portable monitors such as MicroPEM can accurately characterize personal exposure of pollutants, which is critical for linking exposure and health effects of air pollution. The RTI (RTI International, Research Triangle Park, NC, USA) MicroPEM V3.2A provides both real-time fine particulate matter (PM2.5 ) concentrations and time-integrated PM samples collected onto Teflon filters that can be used to correct real-time data as well as allow further lab chemical analysis of species on filters (e.g., metal, black carbon)...
January 11, 2019: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/30641311/evaluation-of-the-uptake-capacities-of-heavy-metals-in-chinese-cabbage
#8
Baobin Mi, Feng Liu, Lingling Xie, Huoqiang Zhou, Fangfang Wu, Xiongze Dai
Heavy metal (HM) contamination in soil result in second pollution damage to Chinese cabbage, leading to deleterious health impacts. To elucidate the common transfer and accumulation characteristics of HMs in Chinese cabbage cultivar is important for safety breeding and consumption. In this case, concentrations and transfer capacities of HMs (Cd, Cr, Hg, Pb and As) in 35 common Chinese cabbage genotypes and their genotypic difference were investigated in this work. Results indicate that Chinese cabbage cultivar was more susceptible to Cd pollution, Hg was easily sifted from underground part to aerial part, Cr and Pb have similar enrichment and translocation characteristics, and Chinese cabbage cultivar had tolerance to As toxicity to some extent...
January 11, 2019: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/30639957/protective-effect-of-n-acetylcysteine-on-fenitrothion-induced-toxicity-the-antioxidant-status-and-metabolizing-enzymes-expression-in-rats
#9
Azza A A Galal, Raghda A Ramadan, Mohamed M M Metwally, Sawsan M A El-Sheikh
The existence of fenitrothion (FNT) in the soil, water, and food products has harmful effects on non-target organisms. Therefore, this study was conducted to evaluate the hepatotoxic, nephrotoxic and neurotoxic effects of FNT and the possible ameliorative effect of N-acetylcysteine (NAC), a precursor of intracellular GSH, on FNT-induced toxicity. For this purpose, thirty-two adult male albino rats were allocated into control group and groups treated with NAC (200 mg/kg), FNT (10 mg/kg) and FNT + NAC via gastric tube daily for 28 days...
January 10, 2019: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/30639956/effect-of-roxarsone-metabolites-in-chicken-manure-on-soil-biological-property
#10
Lixian Yao, Lianxi Huang, Cuihua Bai, Changmin Zhou, Zhaohuan He
Roxarsone (ROX), an organoarsenic feed additive, occurs as itself and its metabolites including As(V), As(III), monomethylarsonic acid (MMA) and dimethylarsinic acid (DMA) in animal manure. Animal manure improves soil biological property, whereas As compounds impact microorganisms. The integral influence of animal manure bearing ROX metabolites on soil biological quality is not clear yet. Herein, the effect of four chicken manures excreted by chickens fed with four diets containing 0, 40, 80 and 120 mg ROX kg-1 , on soil biological attributes...
January 10, 2019: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/30639875/evaluating-expression-of-autophagy-related-genes-in-oriental-river-prawn-macrobrachium-nipponense-as-potential-biomarkers-for-hypoxia-exposure
#11
Shengming Sun, Ying Wu, Hongtuo Fu, Ming Yang, Xianping Ge, Jian Zhu, Fujun Xuan, Xugan Wu
Autophagy, a crucial process for maintaining cellular homeostasis, is under the control of several autophagy-related (ATG) proteins, and is highly conserved in most animals, but its response to adverse environmental conditions is poorly understood in crustaceans. Herein, we hypothesised that autophagy acts as a protective response to hypoxia, and Beclin 1, ATG7 and ATG8 in oriental river prawn (Macrobrachium nipponense) were chosen as potential biomarkers under hypoxia exposure; thus, their full-length cDNA sequences were cloned and characterised...
January 9, 2019: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/30639874/adverse-effects-of-bisphenol-a-on-sertoli-cell-blood-testis-barrier-in-rare-minnow-gobiocypris-rarus
#12
Shiyu Tao, Lihong Wang, Zeliang Zhu, Yan Liu, Lang Wu, Cong Yuan, Guo Zhang, Zaizhao Wang
Bisphenol A (BPA), an environmental contaminant, has been shown to disturb the dynamics of Sertoli cell blood-testis barrier (BTB) in mammal testis. However, the effects of BPA on Sertoli cell barrier (SC barrier) were little known in fish to date. To evaluate the potential mechanism of reproductive toxicity of BPA, we studied the damage of SC barrier using in vivo models. In this study, male adult rare minnow Gobiocypris rarus were exposed to 15 μg/L BPA for 7-35 days. Gonadal histology and the integrity of SC barrier were analyzed...
January 9, 2019: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/30639873/osteopontin-potentiates-pm-induced-il-1%C3%AE-and-il-1%C3%AE-production-via-the-erk-jnk-signaling-pathway
#13
Jian Wang, Jianan Huang, Mengchan Zhu, Shujing Chen, Cuicui Chen, Changhong Miao, Hong He, Yuanlin Song
Ambient particulate matter (PM) poses a great threat to global health and contributes to pulmonary inflammation. However, the potential mechanism of PM-induced inflammation of the lung remains unclear. Osteopontin (OPN) is a multifunctional protein that reportedly regulates inflammatory responses in different diseases. Here, we explored the expression of OPN with PM exposure in vivo and in vitro and attempted to elucidate the regulatory role of OPN in PM-induced airway inflammation. Our results showed that PM exposure increased the expression of OPN in the bronchial epithelium, serum, and bronchoalveolar lavage fluid (BALF) of mice...
January 9, 2019: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/30639872/toxicokinetics-and-toxic-effects-of-a-chinese-pfos-alternative-f-53b-in-adult-zebrafish
#14
Yongming Wu, Mi Deng, Yuanxiang Jin, Xin Liu, Zhaohuan Mai, Hailin You, Xiyan Mu, Xiaoli He, Reem Alharthi, Daniel Joseph Kostyniuk, Chunyan Yang, Wenqing Tu
6:2 chlorinated polyfluorinated ether sulfonate (F-53B), a Chinese PFOS alternative, has recently been identified in river water, sewage sludge, wildlife and humans, causing great concerns about its potential toxic effects. Here, we report the first investigation of the toxicokinetics and oxidative stress of F-53B in adult zebrafish. Adult male and female zebrafish were exposed to 10 and 100 μg/L of F-53B for 7 days followed by a 5-d depuration period to examine bioaccumulation, distribution, and depuration of F-53B in fish...
January 9, 2019: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/30639871/cadmium-and-arsenic-accumulation-during-the-rice-growth-period-under-in-situ-remediation
#15
Jiao-Feng Gu, Hang Zhou, Hui-Ling Tang, Wen-Tao Yang, Min Zeng, Zhi-Ming Liu, Pei-Qin Peng, Bo-Han Liao
Rice (Oryza sativa L.) planted in cadmium (Cd)- and arsenic (As)-contaminated soil is considered the main source of dietary Cd and As intake for humans in Southeast Asia and thereby poses a threat to human health. Minimizing the transfer of these pollutants to rice grain is an urgent task for environmental researchers. The main objective of this study was to investigate the effects and the mechanisms of a combined amendment (hydroxyapatite + zeolite + biochar, HZB) on decreasing Cd and As accumulation in rice...
January 9, 2019: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/30639870/wastewater-agar-as-a-selection-environment-a-first-step-towards-a-fungal-in-situ-bioaugmentation-strategy
#16
Valeria Tigini, Federico Bevione, Valeria Prigione, Anna Poli, Lucrezia Ranieri, Francesco Spennati, Giulio Munz, Giovanna Cristina Varese
Viable and metabolically active fungi in toxic mixed liquors, treating landfill leachates and municipal wastewaters, were identified by culture depending methods. A selective culture medium consisting of wastewater and agar (WA) restrained fungi that could be randomly present (94% of the 51 taxa retrieved on WA were sample-specific), overcoming the problem of fast growing fungi or mycoparasite fungi. Moreover, WA allowed the isolation of fungi with a possible role in the degradation of pollutants typically present in the two wastewaters...
January 9, 2019: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/30639869/genome-wide-identification-and-expression-analysis-of-hkt-transcription-factor-under-salt-stress-in-nine-plant-species
#17
Huayang Li, Guangzhao Xu, Chao Yang, Long Yang, Zhenchang Liang
High-affinity K+ (HKT) gene family is regulated the transport of Na+ and maintain the balance between Na+ and K+ in the process of plant growth, development and response to abiotic stress. Despite this fact, systemic and comprehensive studies on HKT in multiply plants remains unknown. A total of 29 HKT genes distributed on nine species were identified. Phylogenetic tree analysis results indicated that HKT genes were divided into five homology subfamilies. Combining structural analysis with protein contains five highly conservative motifs, HKT family has similar gene structures and special gene characteristics...
January 9, 2019: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/30639868/immobilization-of-cadmium-and-improvement-of-bacterial-community-in-contaminated-soil-following-a-continuous-amendment-with-lime-mixed-with-fertilizers-a-four-season-field-experiment
#18
Lei Shi, Zhaohui Guo, Chi Peng, Xiyuan Xiao, Wenli Feng, Bo Huang, Hongzhen Ran
The effects of the continuous amendments with lime (L), lime mixed with organic manure (LO), or phosphate fertilizer (LP) on the soil bacterial community, soil available cadmium (Cd) content, and Cd accumulation in rice planted in a Cd contaminated paddy soil were determined through a four-season field experiment. The results showed that with continuous application of amendments during the four seasons, the soil pH increased significantly compared with the control, while the soil available Cd content significantly decreased by 12...
January 9, 2019: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/30639867/population-effects-of-heavy-metal-pollution-in-wild-algerian-mice-mus-spretus
#19
Ana Sofia Quina, Ana Filipa Durão, Francesc Muñoz-Muñoz, Jacint Ventura, Maria da Luz Mathias
Heavy metal mining is one of the largest sources of environmental pollution. The analysis of different types of biomarkers in sentinel species living in contaminated areas provides a measure of the degree of the ecological impact of pollution and is thus a valuable tool for human and environmental risk assessments. In previous studies we found that specimens from two populations of the Algerian mice (Mus spretus) living in two abandoned heavy metal mines (Aljustrel and Preguiça, Portugal) had higher body burdens of heavy metals, which led to alterations in enzymatic activities and in haematological, histological and genotoxic parameters, than mice from a nearby reference population...
January 8, 2019: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/30634092/levels-and-health-risks-of-pm-2-5-bound-toxic-metals-from-firework-firecracker-burning-during-festival-periods-in-response-to-management-strategies
#20
Jianwei Liu, Yanjiao Chen, Sihong Chao, Hongbin Cao, Aichen Zhang
Daily PM2.5 was collected in the periods before, during and after the Chinese Spring Festival (CSF) in both 2016 and 2018 to clarify the annual variation in the concentrations and health risks of toxic metals under different firework/firecracker (FF) management strategies. PM2.5 and bound metals all decreased during the CSF from 2016 to 2018. According to relative abundance analysis, toxic metals, i.e., Ba, Pb, Cu and Cr, showed obvious peak concentrations and abundance levels on intensive FF burning days, i...
January 8, 2019: Ecotoxicology and Environmental Safety
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