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https://www.readbyqxmd.com/read/29353198/a-tiered-approach-to-assess-effects-of-diclofenac-on-the-brown-mussel-perna-perna-a-contribution-to-characterize-the-hazard
#1
Mayana Karoline Fontes, Paloma Kachel Gusso-Choueri, Luciane Alves Maranho, Denis Moledo de Souza Abessa, Wesley Almeida Mazur, Bruno Galvão de Campos, Luciana Lopes Guimarães, Marcos Sergio de Toledo, Daniel Lebre, Joyce Rodrigues Marques, Andreia Arantes Felicio, Augusto Cesar, Eduardo Alves Almeida, Camilo Dias Seabra Pereira
Pharmaceutical discharges into the aquatic ecosystem are of environmental concern and sewage treatment plants (STPs) have been pointed out as the major source of these compounds to coastal zones, where oceanic disposal of sewage occurs through submarine outfalls. Diclofenac (DCF) is one of the most frequently detected pharmaceuticals in water, but little is known about the effects on marine organisms. In this study, we employed a tiered approach involving the determination of environmental concentrations of DCF in marine water and the adverse biological effects for fertilization, embryo-larval development and biomarker responses of the mussel Perna perna...
December 29, 2017: Water Research
https://www.readbyqxmd.com/read/29352084/detection-of-human-bocavirus-species-2-and-3-in-bivalve-shellfish-in-italy
#2
G La Rosa, G Purpari, A Guercio, S Di Bella, F Gucciardi, Y T R Proroga, M Pisanu, S Della Libera, M Iaconelli, E Suffredini
Human bocavirus (HBoV) has been shown to be a common cause of respiratory infections and gastroenteritis in children. Recently, HBoVs have been detected in sewage and river waters in Italy and worldwide. However, no studies are yet available on their presence in other water environments and in bivalve molluscs.In this study, 316 bivalve shellfish samples collected in three Italian regions over a six-year period (2012-2017) were analyzed by nested PCR and sequencing using broad-range primer pairs targeting the capsid proteins VP1/VP2 of HBoV...
January 19, 2018: Applied and Environmental Microbiology
https://www.readbyqxmd.com/read/29350219/reducing-the-nitrogen-footprint-of-a-small-residential-college
#3
Neil Leary, Elizabeth de la Reguera, Steven Fitzpatrick, Olivia Boggiano-Peterson
The release of reactive nitrogen contributes to its accumulation in the environment, causing a variety of harmful effects. To measure Dickinson College's contribution to nitrogen pollution, and quantify the potential to reduce its contribution, we calculated the college's nitrogen footprint and simulated the effects of selected nitrogen mitigation measures. The analysis was obtained using the Nitrogen Footprint Tool, developed at the University of Virginia. Food production is by far the largest contributor to Dickinson's footprint, followed by heat and power...
April 1, 2017: Sustainability (New Rochelle)
https://www.readbyqxmd.com/read/29350132/toward-forensic-uses-of-microbial-source-tracking
#4
Christopher M Teaf, David Flores, Michele Garber, Valerie J Harwood
The science of microbial source tracking has allowed researchers and watershed managers to go beyond general indicators of fecal pollution in water such as coliforms and enterococci, and to move toward an understanding of specific contributors to water quality issues. The premise of microbial source tracking is that characteristics of microorganisms that are strongly associated with particular host species can be used to trace fecal pollution to particular animal species (including humans) or groups, e.g., ruminants or birds...
January 2018: Microbiology Spectrum
https://www.readbyqxmd.com/read/29350131/antimicrobial-resistance-in-stenotrophomonas-spp
#5
Yang Wang, Tao He, Zhangqi Shen, Congming Wu
Bacteria of the genus Stenotrophomonas are found throughout the environment, in close association with soil, sewage, and plants. Stenotrophomonas maltophilia, the first member of this genus, is the predominant species, observed in soil, water, plants, animals, and humans. It is also an opportunistic pathogen associated with the increased number of infections in both humans and animals in recent years. In this article, we summarize all Stenotrophomonas species (mainly S. maltophilia) isolated from animals and food products of animal origin and further distinguish all isolates based on antimicrobial susceptibility and resistance phenotypes...
January 2018: Microbiology Spectrum
https://www.readbyqxmd.com/read/29348062/improving-sewage-sludge-composting-by-addition-of-spent-mushroom-substrate-and-sucrose
#6
Liqiang Meng, Shumei Zhang, Hainan Gong, Xiancheng Zhang, Chuandong Wu, Weiguang Li
The effects of spent mushroom substrate (SMS) and sucrose (S) amendment on emissions of nitrogenous gas (mainly NH3 and N2O) and end products quality of sewage sludge (SS) composting were evaluated. Five treatments were composted for 20 days in laboratory-scale using SS with different dosages of SMS and S, without additive amended treatment used as control. The results indicated that SMS amendments especially combination with S promoted dehydrogenase activity, CO2 production, organic matter degradation and humification in the composting, and maturity indices of composting also showed that the 30%SMS+2%S treatment could be much more appropriate to improve the composting process, such as total Kjeldahl nitrogen, nitrification index, humic acids/fulvic acids ratio and germination index, while the emissions of NH3 and N2O were reduced by 34...
January 4, 2018: Bioresource Technology
https://www.readbyqxmd.com/read/29343711/silver-nanoparticles-in-the-water-environment-in-malaysia-inspection-characterization-removal-modeling-and-future-perspective
#7
Achmad Syafiuddin, Salmiati Salmiati, Tony Hadibarata, Ahmad Beng Hong Kueh, Mohd Razman Salim, Muhammad Abbas Ahmad Zaini
The current status of silver nanoparticles (AgNPs) in the water environment in Malaysia was examined and reported. For inspection, two rivers and two sewage treatment plants (STPs) were selected. Two activated carbons derived from oil palm (ACfOPS) and coconut (ACfCS) shells were proposed as the adsorbent to remove AgNPs. It was found that the concentrations of AgNPs in the rivers and STPs are in the ranges of 0.13 to 10.16 mg L-1 and 0.13 to 20.02 mg L-1, respectively, with the highest concentration measured in July...
January 17, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29340454/human-leptospirosis-in-the-federal-district-brazil-2011-2015-eco-epidemiological-characterization
#8
Ivanildo de Oliveira Correia Santos, Marina Frota de Albuquerque Landi, Laurício Monteiro Cruz, Maria Isabel Rao Bofill, Divino Eterno Dos Santos, Eduardo Maurício Mendes de Lima, Márcio Botelho de Castro
INTRODUCTION: Leptospirosis is an infectious disease that affects more than 5,000 people per year in Brazil. The Federal District (FD) lacks epidemiological studies of human leptospirosis and presents concerning rates of this disease, especially considering its lethality. METHODS: Seventy-nine autochthonous human cases of leptospirosis between 2011 and 2015 were analyzed, with the probable infection location serving as a basis for the collection and analysis of the environmental and epidemiological variables...
November 2017: Revista da Sociedade Brasileira de Medicina Tropical
https://www.readbyqxmd.com/read/29339611/mechanism-of-1-4-dioxane-microbial-degradation-revealed-by-16s-rrna-and-metatranscriptomic-analyses
#9
Xiangyu Guan, Fei Liu, Jing Wang, Caoxiang Li, Xiaoxuan Zheng
1,4-Dioxane (dioxane), a probable human carcinogen, often exists in industrial wastewater and domestic sewage. In this study, we applied 16S rRNA and metatranscriptomic methods to analyze the dioxane biodegradation mechanism by activated sludge. Tetrahydrofuran (THF) was added as an essential co-metabolite to promote the degradation of dioxane. We found the dioxane removal ratio increased with increasing THF concentrations. When the THF concentration increased from 60.0 to 200.0 mg/L, the dioxane degradation rate was stable...
January 2018: Water Science and Technology: a Journal of the International Association on Water Pollution Research
https://www.readbyqxmd.com/read/29339599/full-scale-performance-of-selected-starch-based-biodegradable-polymers-in-sludge-dewatering-and-recommendation-for-applications
#10
Kuangxin Zhou, Johan Stüber, Rabea-Luisa Schubert, Christian Kabbe, Matthias Barjenbruch
Agricultural reuse of dewatered sludge is a valid route for sludge valorization for small and mid-size wastewater treatment plants (WWTPs) due to the direct utilization of nutrients. A more stringent of German fertilizer ordinance requires the degradation of 20% of the synthetic additives like polymeric substance within two years, which came into force on 1 January 2017. This study assessed the use of starch-based polymers for full-scale dewatering of municipal sewage sludge. The laboratory-scale and pilot-scale trials paved the way for full-scale trials at three WWTPs in Germany...
January 2018: Water Science and Technology: a Journal of the International Association on Water Pollution Research
https://www.readbyqxmd.com/read/29339343/an-integrated-evaluation-of-some-faecal-indicator-bacteria-fib-and-chemical-markers-as-potential-tools-for-monitoring-sewage-contamination-in-subtropical-estuaries
#11
Ana Caroline Cabral, Jonathan S Stark, Hedda E Kolm, César C Martins
Sewage input and the relationship between chemical markers (linear alkylbenzenes and coprostanol) and fecal indicator bacteria (FIB, Escherichia coli and enterococci), were evaluated in order to establish thresholds values for chemical markers in suspended particulate matter (SPM) as indicators of sewage contamination in two subtropical estuaries in South Atlantic Brazil. Both chemical markers presented no linear relationship with FIB due to high spatial microbiological variability, however, microbiological water quality was related to coprostanol values when analyzed by logistic regression, indicating that linear models may not be the best representation of the relationship between both classes of indicators...
January 12, 2018: Environmental Pollution
https://www.readbyqxmd.com/read/29335025/prevalence-of-a-carbapenem-resistance-gene-kpc-vancomycin-resistance-genes-van-a-b-and-a-methicillin-resistance-gene-meca-in-hospital-and-municipal-sewage-in-a-southwestern-province-of-saudi-arabia
#12
Vinod Kumar Basode, Ahmed Abdulhaq, Mohammed Uthman A Alamoudi, Hassan Mohammad Tohari, Waleed Ali Quhal, Aymen Mohammed Madkhali, Yahya Hasan Hobani, Almonther Abdullah Hershan
OBJECTIVE: According to the World Health Organization, the increasing antibiotic resistance of pathogens is one of the most important threats to human health. Prevalence of a carbapenem-resistance gene (KPC), vancomycin-resistance genes (van A/B) and a methicillin-resistance gene (mecA) in hospital and municipal sewages will be potential threat to public health. RESULTS: Vancomycin-resistance genes were detected in the sewage of community tank-II, sewage tank of the tertiary and general hospital...
January 15, 2018: BMC Research Notes
https://www.readbyqxmd.com/read/29332148/occurrence-of-pharmaceuticals-and-personal-care-products-and-their-associated-environmental-risks-in-a-large-shallow-lake-in-north-china
#13
Panwei Zhang, Huaidong Zhou, Kun Li, Xiaohui Zhao, Qiaona Liu, Dongjiao Li, Gaofeng Zhao
Eighteen selected pharmaceuticals and personal care products (PPCPs), consisting of five non-antibiotic pharmaceuticals (N-APs), four sulfonamides (SAs), four tetracyclines (TCs), four macrolides (MCs), and one quinolone (QN) were detected in water, pore water, and sediment samples from Baiyangdian Lake, China. A total of 31 water samples and 29 sediment samples were collected in March 2017. Caffeine was detected with 100% frequency in surface water, pore water, and sediment samples. Carbamazepine was detected with 100% frequency in surface water and sediment samples...
January 13, 2018: Environmental Geochemistry and Health
https://www.readbyqxmd.com/read/29331913/speciation-evolution-of-zinc-and-copper-during-pyrolysis-and-hydrothermal-carbonization-treatments-of-sewage-sludges
#14
Rixiang Huang, Bei Zhang, Emily M Saad, Ellery D Ingall, Yuanzhi Tang
Thermal and hydrothermal treatments are promising techniques for sewage sludge management that can potentially facilitate safe waste disposal, energy recovery, and nutrient recovery/recycling. Content and speciation of heavy metals in the treatment products affect the potential environmental risks upon sludge disposal and/or application of the treatment products. Therefore, it is important to study the speciation transformation of heavy metals and the effects of treatment conditions. By combining synchrotron X-ray spectroscopy/microscopy analysis and sequential chemical extraction, this study systematically characterized the speciation of Zn and Cu in municipal sewage sludges and their chars derived from pyrolysis (a representative thermal treatment technique) and hydrothermal carbonization (HTC; a representative hydrothermal treatment technique)...
January 4, 2018: Water Research
https://www.readbyqxmd.com/read/29331894/pharmaceutical-concentration-variability-at-sewage-treatment-plant-outlets-dominated-by-hydrology-and-other-factors
#15
Andrea F Brunsch, Thomas L Ter Laak, Huub Rijnaarts, Ekkehard Christoffels
A study was conducted in which the effluent at four small to medium sized sewage treatment plants (STP) in North Rhine-Westphalia, Germany was monitored for three pharmaceutical compounds (carbamazepine, diclofenac, metoprolol) over a period of four years. Grab sampling and auto sampling campaigns were accomplished with respect to various weather conditions in the catchment area. Flow volumes and hydraulic retention times (HRT) from various sampling dates which provide information on processes causing emission changes were additionally taken into account...
January 11, 2018: Environmental Pollution
https://www.readbyqxmd.com/read/29331853/mobility-of-heavy-metals-in-sandy-soil-after-application-of-composts-produced-from-maize-straw-sewage-sludge-and-biochar
#16
K Gondek, M Mierzwa-Hersztek, M Kopeć
Studies on the availability of heavy metals in composted organic materials and in soil amended with these materials are of practical significance. They are used in the assessment of the purity of the soil environment and of the biological value of plants intended for human and animal consumption. Composting of organic materials has a significant effect on changes in mobile forms of heavy metals. Therefore, the aim of this study was to determine the effect of the addition of biochar and sewage sludge on (i) the contents of water soluble forms of Cu, Cd, Pb, and Zn in composts; and (ii) the contents of mobile forms of these elements in sandy soil after the addition of composts...
January 11, 2018: Journal of Environmental Management
https://www.readbyqxmd.com/read/29331718/partition-of-zn-cd-and-pb-during-co-combustion-of-sedum-plumbizincicola-and-sewage-sludge
#17
Feihong Guo, Zhaoping Zhong, Hui Xue
Co-combustion of sedum plumbizincicola and sewage sludge was performed in a tubular furnace. The influence of experimental conditions on the partitioning of Zn, Cd, and Pb was investigated. The results showed that 30% sewage sludge was proposed as the optimal ratio for the co-combustion as a compromise between low calorific value and high amount of heavy metal remained in the bottom ash. High temperature increased the volatilization degree of heavy metals, among which the performance of Cd and Pb was obvious than Zn...
January 6, 2018: Chemosphere
https://www.readbyqxmd.com/read/29329343/effect-of-freeze-thaw-cycling-on-grain-size-of-biochar
#18
Zuolin Liu, Brandon Dugan, Caroline A Masiello, Leila M Wahab, Helge M Gonnermann, Jeffrey A Nittrouer
Biochar may improve soil hydrology by altering soil porosity, density, hydraulic conductivity, and water-holding capacity. These properties are associated with the grain size distributions of both soil and biochar, and therefore may change as biochar weathers. Here we report how freeze-thaw (F-T) cycling impacts the grain size of pine, mesquite, miscanthus, and sewage waste biochars under two drainage conditions: undrained (all biochars) and a gravity-drained experiment (mesquite biochar only). In the undrained experiment plant biochars showed a decrease in median grain size and a change in grain-size distribution consistent with the flaking off of thin layers from the biochar surface...
2018: PloS One
https://www.readbyqxmd.com/read/29329010/uva-uvb-activation-of-hydrogen-peroxide-and-persulfate-for-advanced-oxidation-processes-efficiency-mechanism-and-effect-of-various-water-constituents
#19
Wenyu Huang, Angelica Bianco, Marcello Brigante, Gilles Mailhot
In the present work we investigate the activation efficiency of H2O2 and S2O82- using UVA and UVB radiation. Bisphenol-A (BPA) is used as model pollutants to estimate the oxidative process efficiency in simulated and real sewage treatment plant waters. Particular attention is paid to the BPA removal efficiency and to the radical mechanism involvement considering the effect of typical inorganic water constituents (carbonates and chloride ions) and organic matter. Despite a detrimental effect observed when carbonate ions are in solution using both hydrogen peroxide and persulafate, the presence of high chloride ions concentration was found to improve BPA removal using S2O82- as radical precursor...
January 4, 2018: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/29328986/post-anaerobic-digestion-thermal-hydrolysis-of-sewage-sludge-and-food-waste-effect-on-methane-yields-dewaterability-and-solids-reduction
#20
Kine Svensson, Oda Kjørlaug, Matthew J Higgins, Roar Linjordet, Svein J Horn
Post-anaerobic digestion (PAD) treatment technologies have been suggested for anaerobic digestion (AD) to improve process efficiency and assure hygenization of organic waste. Because AD reduces the amount of organic waste, PAD can be applied to a much smaller volume of waste compared to pre-digestion treatment, thereby improving efficiency. In this study, dewatered digestate cakes from two different AD plants were thermally hydrolyzed and dewatered, and the liquid fraction was recirculated to a semi-continuous AD reactor...
January 4, 2018: Water Research
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