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https://www.readbyqxmd.com/read/29241155/dissolved-organic-matter-reduces-cuo-nanoparticle-toxicity-to-duckweed-in-simulated-natural-systems
#1
Devin A Rippner, Peter G Green, Thomas M Young, Sanjai J Parikh
With increasing demand for recycled wastewater for irrigation purposes, there is a need to evaluate the potential for manufactured nanomaterials in waste water to impact crop production and agroecosystems. Copper oxide nanoparticles (CuO NPs) have previously been shown to negatively impact the growth of duckweed (Landoltia punctata) a model aquatic plant consumed by water fowl and widely found in agricultural runoff ditches in temperate climates. However, prior studies involving CuO NP toxicity to duckweed have focused on systems without the presence of dissolved organic matter (DOM)...
December 11, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/29239573/urbanisation-and-its-effect-on-risk-factors-associated-with-childhood-diarrhoea-in-mbour-senegal-a-visualisation
#2
Sokhna Thiam, Samuel Fuhrimann, Aminata Niang-Diène, Ibrahima Sy, Ousmane Faye, Jürg Utzinger, Guéladio Cissé
Rapid urbanisation, particularly in secondary cities in Africa, brings along specific challenges for global health, including the prevention and control of infectious diseases such as diarrhoea. Our purpose was to visualise urbanisation trends and its effect on risk factors associated with childhood diarrhoea, e.g. water supply, sanitation, wastewater and solid waste management in Mbour, a secondary city in south-western Senegal. Our visualisation is facilitated by epidemiological and geographical surveys carried out in 2016...
November 27, 2017: Geospatial Health
https://www.readbyqxmd.com/read/29235508/genetic-adaptation-of-microbial-populations-present-in-high-intensity-catfish-production-systems-with-therapeutic-oxytetracycline-treatment
#3
Qifan Zeng, Xiangli Tian, Luxin Wang
Microbial communities that are present in aquaculture production systems play significant roles in degrading organic matter, controlling diseases, and formation of antibiotic resistance. It is important to understand the diversity and abundance of microbial communities and their genetic adaptations associated with environmental physical and chemical changes. Here we collected water and sediment samples from a high-intensity catfish production system and its original water reservoir. The metagenomic analysis showed that Proteobacteria, Actinobacteria, Bacteroidetes, Cyanobacteria, and Firmicutes were the top five phyla identified from all samples...
December 13, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29234706/adsorption-of-diclofenac-onto-different-biochar-microparticles-dataset-characterization-and-dosage-of-biochar
#4
Linson Lonappan, Tarek Rouissi, Satinder Kaur Brar, Mausam Verma, Rao Y Surampalli
Due to its wide occurrence in water resources and toxicity, pharmaceuticals and personal care products are becoming an emerging concern throughout the world. Application of residual/waste materials for water remediation can be a good strategy in waste management as well as in waste valorization. Herein, this dataset provides information on biochar application for the removal of emerging contaminant, diclofenac from water matrices. The data presented here is an extension of the research article explaining the mechanisms of adsorption diclofenac on biochars (Lonappan et al...
February 2018: Data in Brief
https://www.readbyqxmd.com/read/29233712/removal-of-lead-ii-from-aqeouos-waste-using-cd-pcl-tio2-bio-nanocomposites
#5
K M Seema, B B Mamba, J Njuguna, R Z Bakhtizin, A K Mishra
Lead (Pb) pollution is our water system is a major concern, as this metal is toxic even at low concentration. This study aim to fabricate a bio-nanocomposite (cyclodextrin-polycaprolactone titanium dioxide) that will be used as an adsorbent for the removal of lead in aqueous waste. In this study, titanium dioxide was synthesized via sol-gel technique then incorporated in a polymer blend (CD-PCL) via solution blending method. The resulting bio-nanocomposites were characterized using Scanning Electron Microscopy (SEM), transmission electron microscope (TEM) and Brunauer Emmett and Teller (BET)...
December 9, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/29229200/waste-based-alternative-adsorbents-for-the-remediation-of-pharmaceutical-contaminated-waters-has-a-step-forward-already-been-taken
#6
REVIEW
Carla Patrícia Silva, Guilaine Jaria, Marta Otero, Valdemar I Esteves, Vânia Calisto
When adsorption is considered for water treatment, commercial activated carbon is usually the chosen adsorbent for the removal of pollutants from the aqueous phase, particularly pharmaceuticals. In order to decrease costs and save natural resources, attempts have been made to use wastes as raw materials for the production of alternative carbon adsorbents. This approach intends to increase efficiency, cost-effectiveness, and also to propose an alternative and sustainable way for the valorization/management of residues...
December 2, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/29228006/sea-star-wasting-disease-in-asterias-forbesi-along-the-atlantic-coast-of-north-america
#7
Caitlin Bucci, Madison Francoeur, Jillon McGreal, Roxanna Smolowitz, Vanesa Zazueta-Novoa, Gary M Wessel, Marta Gomez-Chiarri
As keystone species, sea stars serve to maintain biodiversity and species distribution through trophic level interactions in marine ecosystems. Recently, Sea Star Wasting Disease (SSWD) has caused widespread mass mortality in several sea star species from the Pacific Coast of the United States of America (USA) and Asterias forbesi on the Atlantic Coast. A densovirus, named Sea Star associated Densovirus (SSaDV), has been associated with the wasting disease in Pacific Coast sea stars, and limited samples of A...
2017: PloS One
https://www.readbyqxmd.com/read/29227941/extractive-waste-management-a-risk-analysis-approach
#8
Neha Mehta, Giovanna Antonella Dino, Franco Ajmone-Marsan, Manuela Lasagna, Chiara Romè, Domenico Antonio De Luca
Abandoned mine sites continue to present serious environmental hazards because the heavy metals associated with extractive waste are continuously released into the environment, where they threaten human life and the environment. Remediating and securing extractive waste are complex, lengthy and costly processes. Thus, in most European countries, a site is considered for intervention when it poses a risk to human health and the surrounding environment. As a consequence, risk analysis presents a viable decisional approach towards the management of extractive waste...
December 8, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/29225395/review-water-recovery-from-brines-and-salt-saturated-solutions-operability-and-thermodynamic-efficiency-considerations-for-desalination-technologies
#9
Leland M Vane
BACKGROUND: When water is recovered from a saline source, a brine concentrate stream is produced. Management of the brine stream can be problematic, particularly in inland regions. An alternative to brine disposal is recovery of water and possibly salts from the concentrate. RESULTS: This review provides an overview of desalination technologies and discusses the thermodynamic efficiencies and operational issues associated with the various technologies particularly with regard to high salinity streams...
March 8, 2017: Journal of Chemical Technology and Biotechnology
https://www.readbyqxmd.com/read/29224716/the-role-of-constructed-wetlands-in-a-new-circular-economy-resource-oriented-and-ecosystem-services-paradigm
#10
F Masi, A Rizzo, M Regelsberger
Wastewater management is included in one of the 17 Sustainable Development Goals (SDGs): SDG 6 is dedicated to water and sanitation and sets out to "ensure availability and sustainable management of water and sanitation for all". SDG 6 expands the Millennium Development Goals (MDGs) focus on drinking water and basic sanitation to now cover the entire water cycle, including the management of water, wastewater and ecosystem resources. A UN report in 2017 states that likely over 80% of the wastewater worldwide is still discharged without adequate treatment...
December 7, 2017: Journal of Environmental Management
https://www.readbyqxmd.com/read/29222091/waste-management-informal-recycling-environmental-pollution-and-public-health
#11
Hong Yang, Mingguo Ma, Julian R Thompson, Roger J Flower
With rapid population growth, especially in low-income and middle-income countries, the generation of waste is increasing at an unprecedented rate. For example, annual global waste arising from waste electrical and electronic equipment alone will have increased from 33.8 to 49.8 million tonnes between 2010 and 2018. Despite incineration and other waste treatment techniques, landfill still dominates waste disposal in low-income and middle-income countries. There is usually insufficient funding for adequate waste management in these countries and uptake of more advanced waste treatment technologies is poor...
December 8, 2017: Journal of Epidemiology and Community Health
https://www.readbyqxmd.com/read/29221091/raman-lidar-for-hydrogen-gas-concentration-monitoring-and-future-radioactive-waste-management
#12
Anasthase Liméry, Nicolas Cézard, Didier Fleury, Didier Goular, Christophe Planchat, Johan Bertrand, Alain Hauchecorne
A multi-channel Raman lidar has been developed, allowing for the first time simultaneous and high-resolution profiling of hydrogen gas and water vapor. The lidar measures vibrational Raman scattering in the UV (355 nm) domain. It works in a high-bandwidth photon counting regime using fast SiPM detectors and takes into account the spectral overlap between hydrogen and water vapor Raman spectra. Measurement of concentration profiles of H2 and H2O are demonstrated along a 5-meter-long open gas cell with 1-meter resolution at 85 meters...
November 27, 2017: Optics Express
https://www.readbyqxmd.com/read/29220818/reuse-of-sustainable-materials-for-xylenol-orange-dye-and-copper-ii-ion-ammoniacal-removal
#13
M I Garrudo-Guirado, A Blanco-Flores, H P Toledo-Jaldin, V Sánchez-Mendieta, A R Vilchis-Néstor
Water pollution caused by heavy metals and organic compounds is an environmental problem with negative impact, making the restoration of water quality a priority. In this paper, the adsorption of xylenol orange dye (XO) on vitreous tuff mineral (VT) was studied. It was established that the adsorption capacity of VT was 45.17 mg/g. The removal was carried out by interactions between active sites on the surface of the material and the functional groups of the dye. The solid waste obtained from this process (VTXO) was reused as adsorbent material for Cu removal in the form of the complex Cu-NH3 because this process was done in an ammoniacal medium...
December 5, 2017: Journal of Environmental Management
https://www.readbyqxmd.com/read/29220805/processing-of-wet-kinnow-mandarin-citrus-reticulata-fruit-waste-into-novel-br%C3%A3-nsted-acidic-ionic-liquids-and-their-application-in-hydrolysis-of-sucrose
#14
Pratibha Dwivedi, Mangat Singh, Naina Sehra, Nishant Pandey, Rajender S Sangwan, Bhuwan B Mishra
In citrus processing industries, where up to 60% of the whole fruit is discarded, generates citrus waste (peel, seeds, membrane, and pulp) on a massive scale. The waste does not currently have high-value applications, instead the majority is disposed of or pelletized for animal feed. Therefore, a concise and efficacious protocol for processing of Kinnow mandarin (Citrus reticulata) fruit waste to numerous novel Brønsted acidic ionic liquids (3a-k) have been developed. BAILs were characterized using spectroscopic techniques (FT-IR and NMR)...
December 2, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/29220774/mitigating-land-pollution-through-pesticide-packages-the-case-of-a-collection-scheme-in-rural-china
#15
Shuqin Jin, Bettina Bluemling, Arthur P J Mol
Pesticide packages that are discarded on agricultural land can contaminate water bodies and pose a threat to the environment and human health. Little is known about how developing countries deal with this kind of land pollution. While in developed countries, packages are collected by professional organizations, the smallholder context in developing countries makes the collection of this waste much more difficult. This paper introduces and analyses a successful Pesticide Package Collection Scheme in one of the poorest regions in China, i...
December 5, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/29220749/phosphorus-loaded-biochar-changes-soil-heavy-metals-availability-and-uptake-potential-of-maize-zea-mays-l-plants
#16
Munir Ahmad, Adel R A Usman, Abdullah S Al-Faraj, Mahtab Ahmad, Abdelazeem Sallam, Mohammad I Al-Wabel
Biochar (BC) was produced by pyrolyzing the date palm leaf waste at 600 °C and then loaded with phosphorus (P) via sorption process. Greenhouse pot experiment was conducted to investigate the application effects of BC and P-loaded biochar (BCP) on growth and availability of P and heavy metals to maize (Zea mays L.) plants grown in contaminated mining soil. The treatments consisted of BC and BCP (at application rates of 5, 10, 20, and 30 g kg-1 of soil), recommended NK and NPK, and a control (no amendment)...
November 28, 2017: Chemosphere
https://www.readbyqxmd.com/read/29220059/fluorescence-detection-and-removal-of-copper-from-water-using-a-biobased-and-biodegradable-2d-soft-material
#17
Meng Li, Zhijiang Liu, Shuwen Wang, David G Calatayud, Wei-Hong Zhu, Tony D James, Lidong Wang, Boyang Mao, Hui-Ning Xiao
We have developed a green and robust fluorogenic (λex = 410 nm, λem = 510 nm) cellulose membrane using graphene oxide (GO) as a construct for simultaneous copper ion recognition and filtration at environmentally relevant levels. The detection limit and removal limit of Cu2+ are 7.3 × 10-7 M and 1000 ppm, respectively. The simplicity and scalability achieved for the detection and removal of metal ions in waste water is particularly noteworthy given the significant problems associated with metal ion pollution of drinking water...
December 8, 2017: Chemical Communications: Chem Comm
https://www.readbyqxmd.com/read/29219839/efficient-exfoliation-of-layered-materials-by-waste-liquor
#18
Jiheng Ding, Hongran Zhao, Yan Zheng, Qiaolei Wang, Hao Chen, Huimin Dou, Haibin Yu
Based on the unique material properties, two-dimensional (2D) nanomaterials such as graphene, molybdenum disulfide (MoS2), and boron nitride (BN) have been attracting increasing research interest. The potential of 2D materials in the form of nanoplatelets used as new materials will be important to both nanomaterials and advanced materials. Usually water is considered as the ideal dispersed medium, while the essential hydrophobicity of 2D nanoplatelets and limitation of mass production became the quite serious obstacles for the usage in various fields...
December 8, 2017: Nanotechnology
https://www.readbyqxmd.com/read/29219396/what-controls-thermo-osmosis-molecular-simulations-show-the-critical-role-of-interfacial-hydrodynamics
#19
Li Fu, Samy Merabia, Laurent Joly
Thermo-osmotic and related thermophoretic phenomena can be found in many situations from biology to colloid science, but the underlying molecular mechanisms remain largely unexplored. Using molecular dynamics simulations, we measure the thermo-osmosis coefficient by both mechanocaloric and thermo-osmotic routes, for different solid-liquid interfacial energies. The simulations reveal, in particular, the crucial role of nanoscale interfacial hydrodynamics. For nonwetting surfaces, thermo-osmotic transport is largely amplified by hydrodynamic slip at the interface...
November 24, 2017: Physical Review Letters
https://www.readbyqxmd.com/read/29216470/occurrence-and-risk-assessment-of-antibiotics-in-water-and-lettuce-in-ghana
#20
David Azanu, Bjarne Styrishave, Godfred Darko, Johan Juhl Weisser, Robert Clement Abaidoo
Hospital wastewater and effluents from waste stabilization ponds in Kumasi, Ghana, are directly discharged as low quality water into nearby streams which are eventually used to irrigate vegetables. The presence of 12 commonly used antibiotics in Ghana (metronidazole, ciprofloxacin, erythromycin, trimethoprim, ampicillin, cefuroxime, sulfamethoxazole, amoxicillin, tetracycline, oxytetracycline, chlortetracycline and doxycycline) were investigated in water and lettuce samples collected in three different areas in Kumasi, Ghana...
December 4, 2017: Science of the Total Environment
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