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https://www.readbyqxmd.com/read/28738631/a-review-aptamer-based-analytical-strategies-using-the-nanomaterials-for-environmental-and-human-monitoring-of-toxic-heavy-metals
#1
REVIEW
Leila Farzin, Mojtaba Shamsipur, Shahab Sheibani
Recent developments in biotechnology offer the new methods for the sensitive detection of heavy metals based on the affinity and specificity of aptamers, as nucleic acid ligands selected from random sequence pools in vitro. Heavy metals have received considerable importance as the most toxic metallic pollutants which may cause serious environmental damages. They are classified as trace elements because of their presence in trace concentrations in various environmental matrices. Thus, the precise and sensitive methods to detect heavy metals are important to ensure human and environment safety...
November 1, 2017: Talanta
https://www.readbyqxmd.com/read/28738509/ambient-sediment-quality-conditions-in-minnesota-lakes-usa-effects-of-watershed-parameters-and-aquatic-health-implications
#2
Judy L Crane
Surficial sediments were collected from 50 randomly selected Minnesota lakes, plus four a priori reference lakes, in 2007. The lakes encompassed broad geographic coverage of the state and included a variety of major land uses in the surrounding watersheds. Sediment samples were analyzed for a suite of metals, metalloids, persistent organic pollutants, total organic carbon, and particle size fractions. In addition, a small fish survey was conducted to assess PBDEs in both whole fish and fish tissues. Sediment quality in this set of lakes ranged from good (43%) to moderate (57%) based on an integrative measure of multiple contaminants...
July 18, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28738304/bacteria-contribute-to-pesticide-degradation-in-cryoconite-holes-in-an-alpine-glacier
#3
Claudia Ferrario, Francesca Pittino, Ilario Tagliaferri, Isabella Gandolfi, Giuseppina Bestetti, Roberto Sergio Azzoni, Guglielmina Diolaiuti, Andrea Franzetti, Roberto Ambrosini, Sara Villa
Organic contaminants deposited on glacier snow and ice are subject to partitioning and degradation processes that determine their environmental fate and, consequently, their accumulation in ice bodies. Among these processes, organic compound degradation by supraglacial bacteria has been investigated to a lesser extent than photo- and chemical degradation. We investigated biodegradation of the organophosphorus insecticide chlorpyrifos (CPF), a xenobiotic tracer that accumulates on glaciers after atmospheric medium- and long-range transport, by installing in situ microcosms on an Alpine glacier to simulate cryoconite hole systems...
July 21, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28738232/molecular-tools-and-emerging-strategies-for-deep-genetic-genomic-refactoring-of-pseudomonas
#4
REVIEW
Esteban Martínez-García, Víctor de Lorenzo
The interest of the genus Pseudomonas largely relies on the virulence of some of its species for plants and animals (including humans). Yet, pathogenic features of some isolates coexist with others often present in environmental variants that promote plant growth and degrade chemical pollutants. Many of these traits can be traced to the intrinsic properties of the genomic chassis of this genus along with distinct genetic parts and devices. With the tools of Synthetic Biology these can be enhanced and/or repurposed for the sake of biological control, environmental remediation and whole-cell biocatalysis...
July 21, 2017: Current Opinion in Biotechnology
https://www.readbyqxmd.com/read/28738227/rapid-and-reliable-determination-of-p-nitroaniline-in-wastewater-by-molecularly-imprinted-fluorescent-polymeric-ionic-liquid-microspheres
#5
Xing Lu, Yiwen Yang, Yanbo Zeng, Lei Li, Xiaohua Wu
Rapid and efficient detecting trace amount of environmental p-nitroaniline (p-NA) is in urgent need for security concerns and pollution supervision. In this work we report the use of molecularly imprinted polymeric ionic liquid (MIPIL) microspheres to construct recognizable surfaces for detection of p-NA through fluorescence quenching. The p-NA imprinted microspheres are synthesized by precipitation polymerization upon co-polymerization of 3-(anthracen-9-ylmethyl)-1-vinyl-1H-imidazol-3-ium chloride (Fluorescent IL monomer) with ethyleneglycol dimethacrylate (EGDMA)...
July 15, 2017: Biosensors & Bioelectronics
https://www.readbyqxmd.com/read/28738089/a-random-forest-approach-to-predict-the-spatial-distribution-of-sediment-pollution-in-an-estuarine-system
#6
Eric S Walsh, Betty J Kreakie, Mark G Cantwell, Diane Nacci
Modeling the magnitude and distribution of sediment-bound pollutants in estuaries is often limited by incomplete knowledge of the site and inadequate sample density. To address these modeling limitations, a decision-support tool framework was conceived that predicts sediment contamination from the sub-estuary to broader estuary extent. For this study, a Random Forest (RF) model was implemented to predict the distribution of a model contaminant, triclosan (5-chloro-2-(2,4-dichlorophenoxy)phenol) (TCS), in Narragansett Bay, Rhode Island, USA...
2017: PloS One
https://www.readbyqxmd.com/read/28737932/ins-and-outs-in-environmental-and-occupational-safety-studies-of-asthma-and-engineered-nanomaterials
#7
Marina A Dobrovolskaia, Michael R Shurin, Valerian E Kagan, Anna A Shvedova
According to the Centers for Disease Control and Prevention, approximately 25 million Americans suffer from asthma. The disease total annual cost is about $56 billion and includes both the direct and indirect costs of medications, hospital stays, missed work, and decreased productivity. Air pollution with xenobiotics, bacterial agents, and industrial nanomaterials, such as carbon nanotubes, contribute to the exacerbation of this condition and are a point of particular attention in environmental toxicology as well as in occupational health and safety research...
July 24, 2017: ACS Nano
https://www.readbyqxmd.com/read/28737929/enhanced-degradation-of-tce-on-a-superfund-site-using-endophyte-assisted-poplar-tree-phytoremediation
#8
Sharon Lafferty Doty, John Leonard Freeman, Christopher M Cohu, Joel Gerard Burken, Andrea Firrincieli, Andrew Simon, Zareen Khan, Jud G Isebrands, Joseph Lukas, Michael J Blaylock
Trichloroethylene (TCE) is a widespread environmental pollutant common in groundwater plumes associated with industrial manufacturing areas. We had previously isolated and characterized a natural bacterial endophyte, Enterobacter sp. strain PDN3, of poplar trees, that rapidly metabolizes TCE, releasing chloride ion. We now report findings from a successful three-year field trial of endophyte-assisted phytoremediation on the Middlefield-Ellis-Whisman Superfund Study Area TCE plume in the Silicon Valley of California...
July 24, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28737443/fertirrigation-with-sugarcane-vinasse-foreseeing-potential-impacts-on-soil-and-water-resources-through-vinasse-characterization
#9
Lucas T Fuess, Isabella J Rodrigues, Marcelo L Garcia
This paper reports the characterization of the polluting potential of sugarcane vinasse, the main wastewater from ethanol production. Compositional data from vinasse samples collected from sugarcane biorefineries were used to predict negative effects on the soil, water resources and crops potentially associated with fertirrigation, the primary final destination of vinasse in Brazil. High risks of soil salinization were associated with the land disposal of vinasse, as evidenced by the high levels of total dissolved solids (TDS; >4,000 mg L(-1)) and electrical conductivity (>6...
July 24, 2017: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
https://www.readbyqxmd.com/read/28737385/a-synthetic-circuit-for-mercury-bioremediation-using-self-assembling-functional-amyloids
#10
Pei Kun Richie Tay, Peter Q Nguyen, Neel S Joshi
Synthetic biology approaches to bioremediation are a key sustainable strategy to leverage the self-replicating and programmable aspects of biology for environmental stewardship. The increasing spread of anthropogenic mercury pollution into our habitats and food chains is a pressing concern. Here, we explore the use of programmed bacterial biofilms to aid in the sequestration of mercury. We demonstrate that by integrating a mercury-responsive promoter and an operon encoding a mercury-absorbing self-assembling extracellular protein nanofiber, we can engineer bacteria that can detect and sequester toxic Hg2+ ions from the environment...
July 24, 2017: ACS Synthetic Biology
https://www.readbyqxmd.com/read/28737160/health-and-environmental-risk-assessment-project-for-bottlenose-dolphins-tursiops-truncatus-from-the-southeastern-usa-ii-environmental-aspects
#11
REVIEW
John S Reif, Adam M Schaefer, Gregory D Bossart, Patricia A Fair
Bottlenose dolphins Tursiops truncatus are the most common apex predators found in coastal and estuarine ecosystems along the southeastern coast of the USA, where these animals are exposed to multiple chemical pollutants and microbial agents. In this review, we summarize the results of investigations of environmental exposures evaluated in 360 free-ranging dolphins between 2003 and 2015. Bottlenose dolphins inhabiting the Indian River Lagoon, Florida (IRL, n = 246), and coastal waters of Charleston, South Carolina (CHS, n = 114), were captured, given comprehensive health examinations, and released as part of a multidisciplinary and multi-institutional study of individual and population health...
July 24, 2017: Diseases of Aquatic Organisms
https://www.readbyqxmd.com/read/28735468/the-effect-of-water-contamination-and-host-related-factors-on-ectoparasite-load-in-an-insectivorous-bat
#12
Carmi Korine, Shai Pilosof, Amit Gross, Juan B Morales-Malacara, Boris R Krasnov
We examined the effects of sex, age, and reproductive state of the insectivorous bat Pipistrellus kuhlii on the abundance and prevalence of arthropod ectoparasites (Macronyssidae and Cimicidae) in habitats with either sewage-polluted or natural bodies of water, in the Negev Desert, Israel. We chose water pollution as an environmental factor because of the importance of water availability in desert environments, particularly for P. kuhlii, which needs to drink on a daily basis. We predicted that parasite infestation rates would be affected by both environment and demographic cohort of the host...
July 22, 2017: Parasitology Research
https://www.readbyqxmd.com/read/28735436/assessing-differences-in-macrofaunal-assemblages-as-a-factor-of-sieve-mesh-size-distance-between-samples-and-time-of-sampling
#13
Lenaïg G Hemery, Kristin K Politano, Sarah K Henkel
With increasing cascading effects of climate change on the marine environment, as well as pollution and anthropogenic utilization of the seafloor, there is increasing interest in tracking changes to benthic communities. Macrofaunal surveys are traditionally conducted as part of pre-incident environmental assessment studies and post-incident monitoring studies when there is a potential impact to the seafloor. These surveys usually characterize the structure and/or spatiotemporal distribution of macrofaunal assemblages collected with sediment cores; however, many different sampling protocols have been used...
August 2017: Environmental Monitoring and Assessment
https://www.readbyqxmd.com/read/28735361/concentrations-source-identification-and-lung-cancer-risk-associated-with-springtime-pm2-5-bound-polycyclic-aromatic-hydrocarbons-pahs-in-nanjing-china
#14
Chong Chen, Zhonghuan Xia, Minmin Wu, Qianqian Zhang, Tao Wang, Liping Wang, Hao Yang
This study concentrated on the pollution level, sources, and lung cancer risk of PM2.5-bound polycyclic aromatic hydrocarbons (PAHs) in spring in Nanjing, China. The PM2.5 samples were collected in spring of the year 2016 in Nanjing. Sixteen United States Environmental Protection Agency priority PAHs were extracted and analyzed after sampling. The mean concentrations of PAHs and BaPeq were 3.98 ± 1.01 and 0.29 ± 0.08 ng/m(3), respectively, which is a low level among results from regions worldwide. The diurnal variations of PAHs and BaPeq concentrations showed a relatively high level in the early morning, at the morning rush time of work and traffic transportation, and in the evening traffic peak hours...
July 22, 2017: Archives of Environmental Contamination and Toxicology
https://www.readbyqxmd.com/read/28735245/association-of-16-priority-polycyclic-aromatic-hydrocarbons-with-humic-acid-and-humin-fractions-in-a-peat-soil-and-implications-for-their-long-term-retention
#15
Weixiao Chen, Hui Wang, Qian Gao, Yin Chen, Senlin Li, Yu Yang, David Werner, Shu Tao, Xilong Wang
To elucidate the environmental fate of polycyclic aromatic hydrocarbons (PAHs) once released into soil, sixteen humic acids (HAs) and one humin (HM) fractions were sequentially extracted from a peat soil, and sixteen priority PAHs in these humic substances (HSs) were analyzed. It was found that the total concentration of 16 PAHs (∑16PAHs) increased evidently from HA1 to HA16, and then dramatically reached the highest value in HM. The trend of ∑16PAHs in HAs relates to surface carbon and C-H/C-C contents, the bulk aliphatic carbon content and aliphaticity, as well as the condensation enhancement of carbon domains, which were derived from elemental composition, XPS, (13)C NMR, as well as thermal analyses...
July 20, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28735151/do-air-pollution-and-neighborhood-greenness-exposures-improve-the-predicted-cardiovascular-risk
#16
Maayan Yitshak-Sade, Itai Kloog, Victor Novack
BACKGROUND: Numerous studies show associations between exposure to Particulate Matter and Cardiovascular disease (CVD). Current cardiovascular equations incorporate the major risk factors for CVD. The patients' environment, however, is not incorporated in these equations. METHODS: In a retrospective analysis, we assessed the contribution of neighborhood greenness and particulate matter (coarse-PM and PM<2.5μm-PM2.5) to the development of CVD by analyzing the change in prediction abilities...
July 20, 2017: Environment International
https://www.readbyqxmd.com/read/28734371/electrospun-nanofibrous-mercury-filter-efficient-concentration-and-determination-of-trace-mercury-in-water-with-high-sensitivity-and-tunable-dynamic-range
#17
Huaming Wang, Wenyao Huang, Lin Tang, Ying Chen, Ying Zhang, Mengxi Wu, Yi Song, Sheng Wen
Herein, we reported a simple and highly sensitive method for the concentration and determination of trace mercury in water samples based on a novel electropsun nanofibrous mercury filter (ENMF). The method consisted of two simple steps: first, the concentration of mercury on a piece of thiol-containing ENMF; and second, the determination of mercury captured on the ENMF using a direct mercury analyzer (DMA). By changing the volume of water sample, the dynamic range of the method could extend from 0.0025 to 6...
August 22, 2017: Analytica Chimica Acta
https://www.readbyqxmd.com/read/28734266/air-quality-and-health-effects-of-biogenic-volatile-organic-compounds-emissions-from-urban-green-spaces-and-the-mitigation-strategies
#18
Yuan Ren, Zelong Qu, Yuanyuan Du, Ronghua Xu, Danping Ma, Guofu Yang, Yan Shi, Xing Fan, Akira Tani, Peipei Guo, Ying Ge, Jie Chang
Biogenic volatile organic compounds (BVOCs) emissions lead to fine particulate matter (PM2.5) and ground-level ozone pollution, and are harmful to human health, especially in urban areas. However, most BVOCs estimations ignored the emissions from urban green spaces, causing inaccuracies in the understanding of regional BVOCs emissions and their environmental and health effects. In this study, we used the latest local vegetation datasets from our field survey and applied an estimation model to analyze the spatial-temporal patterns, air quality impacts, health damage and mitigating strategies of BVOCs emissions in the Greater Beijing Area...
July 19, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28734264/a-small-scale-portable-method-for-extracting-microplastics-from-marine-sediments
#19
Rachel L Coppock, Matthew Cole, Penelope K Lindeque, Ana M Queirós, Tamara S Galloway
Microplastics (plastic particles, 0.1 μm-5 mm in size) are widespread marine pollutants, accumulating in benthic sediments and shorelines the world over. To gain a clearer understanding of microplastic availability to marine life, and the risks they pose to the health of benthic communities, ecological processes and food security, it is important to obtain accurate measures of microplastic abundance in marine sediments. To date, methods for extracting microplastics from marine sediments have been disadvantaged by complexity, expense, low extraction efficiencies and incompatibility with very fine sediments...
July 19, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28734249/nitrogen-losses-and-greenhouse-gas-emissions-under-different-n-and-water-management-in-a-subtropical-double-season-rice-cropping-system
#20
Kaiming Liang, Xuhua Zhong, Nongrong Huang, Rubenito M Lampayan, Yanzhuo Liu, Junfeng Pan, Bilin Peng, Xiangyu Hu, Youqiang Fu
Nitrogen non-point pollution and greenhouse gas (GHG) emission are major challenges in rice production. This study examined options for both economic and environmental sustainability through optimizing water and N management. Field experiments were conducted to examine the crop yields, N use efficiency (NUE), greenhouse gas emissions, N losses under different N and water management. There were four treatments: zero N input with farmer's water management (N0), farmer's N and water management (FP), optimized N management with farmer's water management (OPTN) and optimized N management with alternate wetting and drying irrigation (OPTN+AWD)...
July 19, 2017: Science of the Total Environment
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