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https://www.readbyqxmd.com/read/29929147/transformation-products-of-amoxicillin-and-ampicillin-after-photolysis-in-aqueous-matrices-identification-and-kinetics
#1
Juliana Bazzan Arsand, Rodrigo Barcellos Hoff, Louise Jank, Lucas N Meirelles, M Silvia Díaz-Cruz, Tânia Mara Pizzolato, Damià Barceló
Antibiotics are widely used in human medicine and veterinary production. Residues of these compounds reach the water sources through waste or direct application (e.g. aquaculture). The constant input of the parent drugs and their transformation products into the environment leads these pharmaceuticals to be considered as emerging pollutants. For some molecules, the pathway of degradation and formation in products is less known. To assess the impact of these substances in the environment and in the human health, it is necessary to elucidate the transformation products and their kinetic of degradation to evaluate the possible risks...
June 18, 2018: Science of the Total Environment
https://www.readbyqxmd.com/read/29928986/peptides-as-biosorbents-promising-tools-for-resource-recovery
#2
Robert Braun, Stefanie Bachmann, Nora Schönberger, Sabine Matys, Franziska Lederer, Katrin Pollmann
Despite many innovations, meeting both economic and ecological requirements remains challenging for conventional resource recovery technology. The development of highly selective peptides puts a new competitor on the market. We present an approach to identify peptides for resource recovery using Phage Surface Display. Here, we describe the development of peptides for binding of rare earth element terbium-containing solids and for removal and enrichment of the heavy metal ions of cobalt and nickel out of waste waters and leaching solutions...
June 18, 2018: Research in Microbiology
https://www.readbyqxmd.com/read/29928772/development-of-escherichia-coli-based-gene-expression-profiling-of-sewage-sludge-leachates
#3
Manish Goswami, Faisal Ahmad Khan, Admir Ibrisevic, Per-Erik Olsson, Jana Jass
AIMS: The impact of municipal waste on pathogenic microorganisms released into the environment is a public health concern. The present study aims to evaluate the effects of sewage sludge and antibiotic contaminants on stress response, virulence and antibiotic resistance in a pathogenic Escherichia coli. METHODS AND RESULTS: The effects of sewage sludge leachates on uropathogenic E. coli CFT073 were determined by monitoring the expression of 45 genes associated with antibiotic/metal resistance, stress response and virulence using RT-qPCR...
June 21, 2018: Journal of Applied Microbiology
https://www.readbyqxmd.com/read/29926250/method-of-evaluating-the-impact-of-landfill-leachate-on-groundwater-quality
#4
Kazimierz Szymański, Beata Janowska, Anna Iżewska, Robert Sidełko, Izabela Siebielska
Closed municipal and industrial waste landfill sites create potential hazard of ground water pollution. Pollutants that occur in leachate infiltrate to the soil substratum, where they are carried to in underground water. A municipal waste landfill substratum can be used for elimination of pollutants contained in leachates. Model research was performed with the use of a sand bed and artificially prepared leachates. Efficiency of filtration in a bed of defined thickness was assessed based on change of COD value...
June 20, 2018: Environmental Monitoring and Assessment
https://www.readbyqxmd.com/read/29926227/sarcopenia-in-a-mice-model-of-chronic-liver-disease-role-of-the-ubiquitin-proteasome-system-and-oxidative-stress
#5
Fabián Campos, Johanna Abrigo, Francisco Aguirre, Bruno Garcés, Marco Arrese, Saul Karpen, Daniel Cabrera, Marcelo E Andía, Felipe Simon, Claudio Cabello-Verrugio
Sarcopenia is the loss of muscle mass and strength produced by aging or secondary to chronic diseases such as chronic liver disease (CLD). Although not all types of sarcopenia involve the same features, the most common are decreased fiber diameter and myosin heavy chain (MHC) levels, increased activity of ubiquitin-proteasome system (UPS) and reactive oxygen species (ROS). In this study, we aim to characterize the development of sarcopenia secondary to CLD induced by the hepatotoxin 5-diethoxycarbonyl-1,4-dihydrocollidine (DDC)...
June 20, 2018: Pflügers Archiv: European Journal of Physiology
https://www.readbyqxmd.com/read/29926191/occurrence-and-levels-of-potentially-harmful-elements-phes-in-natural-waters-of-the-gold-mining-areas-of-the-kette-batouri-region-of-eastern-cameroon
#6
M A Jordaan, M E Mimba, S C NguemheFils, B T Edith-Etakah, M Shapi, J Penaye, T C Davies
This study was designed to determine the extent to which alluvial and bedrock gold mining activities in the Kette-Batouri region of Eastern Cameroon are responsible for the discharge of potentially harmful elements (PHEs) into natural water bodies. This is considered to be of great public concern, since elevated levels of PHEs in these water bodies, which are widely used for domestic purposes, could have adverse health and environmental effects on the population and nearby ecosystems. The investigation into the levels of PHEs in natural water bodies of this area was conducted to ascertain the toxicity posed by mine waste stockpiles as data from the literature on this subject are scarce...
June 21, 2018: Environmental Monitoring and Assessment
https://www.readbyqxmd.com/read/29920458/mechanism-insights-into-bio-floc-bound-water-transformation-based-on-synchrotron-x-ray-computed-microtomography-and-viscoelastic-acoustic-response-analysis
#7
Boran Wu, Meng Zhou, Xiaohu Dai, Xiaoli Chai
This study visually tracked the micro-spatial water distribution in bio-flocs of waste activated sludge through in situ synchrotron X-ray computed microtomography. Primarily, the two fractions of bound water, the vicinal water adhering to the surface of organic compositions and the interstitial water mechanically trapped in the net-like structure of bio-flocs, were proposed based on the cross-section imaging results. Furthermore, the determinants on bound water occurrences were explored in terms of viscoelastic acoustic responses of extracellular polymeric substances (EPS)...
June 5, 2018: Water Research
https://www.readbyqxmd.com/read/29915874/the-toxic-truth-about-carbon-nanotubes-in-water-purification-a-perspective-view
#8
Rasel Das, Bey Fen Leo, Finbarr Murphy
Without nanosafety guidelines, the long-term sustainability of carbon nanotubes (CNTs) for water purifications is questionable. Current risk measurements of CNTs are overshadowed by uncertainties. New risks associated with CNTs are evolving through different waste water purification routes, and there are knowledge gaps in the risk assessment of CNTs based on their physical properties. Although scientific efforts to design risk estimates are evolving, there remains a paucity of knowledge on the unknown health risks of CNTs...
June 18, 2018: Nanoscale Research Letters
https://www.readbyqxmd.com/read/29914193/antimicrobial-and-antibiofilm-activities-of-citrus-water-extracts-obtained-by-microwave-assisted-and-conventional-methods
#9
Leonardo Caputo, Laura Quintieri, Maria Maddalena Cavalluzzi, Giovanni Lentini, Solomon Habtemariam
Citrus pomace is a huge agro-food industrial waste mostly composed of peels and traditionally used as compost or animal feed. Owing to its high content of compounds beneficial to humans (e.g., flavonoids, phenol-like acids, and terpenoids), citrus waste is increasingly used to produce valuable supplements, fragrance, or antimicrobials. However, such processes require sustainable and efficient extraction strategies by solvent-free techniques for environmentally-friendly good practices. In this work, we evaluated the antimicrobial and antibiofilm activity of water extracts of three citrus peels (orange, lemon, and citron) against ten different sanitary relevant bacteria...
June 17, 2018: Biomedicines
https://www.readbyqxmd.com/read/29914191/concrete-properties-comparison-when-substituting-a-25-cement-with-slag-from-different-provenances
#10
María Eugenia Parron-Rubio, Francisca Perez-García, Antonio Gonzalez-Herrera, María Dolores Rubio-Cintas
Concrete consumption greatly exceeds the use of any other material in engineering. This is due to its good properties as a construction material and the availability of its components. Nevertheless, the present worldwide construction increases and the high-energy consumption for cement production means a high environmental impact. On the other hand, one of the main problems in the iron and steel industry is waste generation and byproducts that must be properly processed or reused to promote environmental sustainability...
June 17, 2018: Materials
https://www.readbyqxmd.com/read/29913600/adsorption-of-low-concentration-perchlorate-from-aqueous-solution-onto-modified-cow-dung-biochar-effective-utilization-of-cow-dung-an-agricultural-waste
#11
Dongjin Wan, Lairong Wu, Yongde Liu, Hailiang Zhao, Jun Fu, Shuhu Xiao
In this study, cow dung biochar (CDB) and ferric chloride-modified CDB (Fe@CDB) were synthesized to remove low concentration perchlorate from water. The pseudo-second-order kinetics model was used and satisfactorily described perchlorate removal onto CDB and Fe@CDB. The Langmuir model fit the experimental isotherm data better than the Freundlich model. The maximum adsorption capacity obtained using the Langmuir model was 1787 μg/g for Fe@CDB and 304 μg/g for CDB. The detrimental effects of coexisting anions decreased as: NO3 -  > SO4 2 -  > Cl- ...
September 15, 2018: Science of the Total Environment
https://www.readbyqxmd.com/read/29913591/characteristics-of-removal-of-waste-water-marking-pharmaceuticals-with-typical-hydrophytes-in-the-urban-rivers
#12
Haidong Zhou, Xiaojing Liu, Xiaomeng Chen, Tianqi Ying, Zhenxi Ying
The investigations on their variation and distribution of 13 called waste-water marking pharmaceuticals (WWMPs) were conducted under 4 hydrophyte conditions (without plants, with submerged aquatic plant (Myriophyllum verticillatum L.), emergent aquatic plant cattail (Typha orientalis Presl) and floating aquatic plant (Lemna minor L.)) in a simulated urban river system. By the calculation of mass balance, the quantitative distribution of WWMPs in water phase, sediment and plant tissues was identified, and the overall removal efficiencies of target pharmaceuticals in the whole system could be determined...
September 15, 2018: Science of the Total Environment
https://www.readbyqxmd.com/read/29913402/effect-of-surfactant-application-practices-on-the-vertical-transport-potential-of-hydrophobic-pesticides-in-agrosystems
#13
Jeanne Dollinger, Veronika J Schacht, Caroline Gaus, Sharon Grant
Surfactants have the potential to modify the environmental behavior of hydrophobic pesticides leading to an enhanced or reduced mobility risk. This risk is often overlooked in registration procedures due to a lack of suitable methodologies to quantify the transport potential of pesticides with surfactants. In this study we present a novel methodology designed to study the surfactant facilitated transport of pesticides under controlled equilibrium and dynamic hydrologic conditions. Using this methodology, we investigated the risk of chlorpyrifos enhanced mobility for two common surfactant application practices in agrosystems: pesticide spraying and irrigation with waste water...
June 14, 2018: Chemosphere
https://www.readbyqxmd.com/read/29913301/in-vivo-and-in-vitro-anti-inflammatory-effects-of-sophora-flavescens-residues
#14
Hongyan Ma, Qi Huang, Wenshan Qu, Linyuan Li, Min Wang, Shao Li, Fujiang Chu
ETHNOPHARMACOLOGICAL RELEVANCE: The dried roots of Sophora flavescens Ait. (Leguminosae) is traditionally used as antipyretic medicine to reduce inflammation. It is well known that alkaloids and flavonoids are the main constituents of S. flavescens. However, the clinical researches and applications of S. flavescens is mainly based on its water-extracted alkaloids, its flavonoids may still remain in residues and have been underused. With development and manufacturing of S. flavescens in recent years, more herb residues are being produced...
June 15, 2018: Journal of Ethnopharmacology
https://www.readbyqxmd.com/read/29911029/disorders-of-water-balance-following-sellar-and-suprasellar-surgeries-patterns-determinants-and-utility-of-quantitative-analysis
#15
Sonu Kalappurakkal Simon, Praveen Valliyaparambil Pavithran, Aldyne Reena Asirvatham, R Ayyadurai, A Parasuram
Background and Objective: The primary objective of this study was to evaluate the application of principles of quantitative analysis to assess disorders of water balance following surgeries for sellar and suprasellar masses and also to investigate potential factors influencing the occurrence and course of these disorders. Materials and Methods: A total of 36 consecutive adult patients who underwent surgery for sellar and suprasellar masses between 2014 and 2015 were prospectively followed up in this observational study...
March 2018: Indian Journal of Endocrinology and Metabolism
https://www.readbyqxmd.com/read/29909322/contaminated-landslide-runout-deposits-in-rivers-method-for-estimating-long-term-ecological-risks
#16
G Göransson, J Norrman, M Larson
The potential catastrophic event of a landslide bringing contaminants to surface waters has been highlighted in public media, but there are still few scientific studies analyzing the risk of landslides with contaminated soil. The aim of this study is to present a method to estimate the risk of potential long-term ecological effects on water bodies due to contaminated soil released into a river through a landslide. The study constitutes further development of previous work focusing on the instantaneous (short-term) release of contaminants and associated effects...
June 14, 2018: Science of the Total Environment
https://www.readbyqxmd.com/read/29908500/new-approach-for-point-pollution-source-identification-in-rivers-based-on-the-backward-probability-method
#17
Jiabiao Wang, Jianshi Zhao, Xiaohui Lei, Hao Wang
Pollution risk from the discharge of industrial waste or accidental spills during transportation poses a considerable threat to the security of rivers. The ability to quickly identify the pollution source is extremely important to enable emergency disposal of pollutants. This study proposes a new approach for point source identification of sudden water pollution in rivers, which aims to determine where (source location), when (release time) and how much pollutant (released mass) was introduced into the river...
June 13, 2018: Environmental Pollution
https://www.readbyqxmd.com/read/29908454/hydrogen-ions-and-organic-acids-secreted-by-ectomycorrhizal-fungi-pisolithus-sp1-are-involved-in-the-efficient-removal-of-hexavalent-chromium-from-waste-water
#18
Liang Shi, Jiawang Xue, Binhao Liu, Pengcheng Dong, Zhugui Wen, Zhenguo Shen, Yahua Chen
Pisolithus sp1 is an ectomycorrhizal (ECM) fungi that was chosen during a screening test of six strains of ECM fungi due to its ability to tolerate and remove hexavalent chromium (Cr(VI)). The physiological responses of Pisolithus sp1 to Cr(VI) exposure, the relationship between Pisolithus sp1 and exogenously added organic acids (EAOAs) or Na3 VO4 (H+ -ATPase inhibitor) and the ability of Pisolithus sp1 to reduce Cr(VI) in liquid culture were also investigated. Hydrogen ions (H+ ), which were produced directly by Pisolithus sp1, reduced the pH of the medium and played an important role in Cr(VI) reduction; however, Na3 VO4 significantly inhibited this process and resulted in a decrease in the Cr(VI) reduction rates...
June 13, 2018: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/29906754/high-adsorption-performance-for-as-iii-and-as-v-onto-novel-aluminum-enriched-biochar-derived-from-abandoned-tetra-paks
#19
Zhuhong Ding, Xuebin Xu, Thihongnhung Phan, Xin Hu, Guangze Nie
In order to develop promising sorbents for value-added application of solid wastes, low-cost aluminum-enriched biochar was prepared from abandoned Tetra Pak used to hold milks, a paper-polyethylence-Al foil laminated package box, after acid pretreatment and subsequent slow pyrolysis under an oxygen-limited environment at 600 °C. The basic physicochemical properties of the resultant biochar were characterized and the sorption performance of aqueous As(III) and As(V) was investigated via batch and column sorption experiments...
June 12, 2018: Chemosphere
https://www.readbyqxmd.com/read/29906752/heavy-metal-pollution-and-spatial-distribution-in-surface-sediments-of-mustafakemalpa%C3%A5-a-stream-located-in-the-world-s-largest-borate-basin-turkey
#20
Philip Isaac Omwene, Mehmet Salim Öncel, Meltem Çelen, Mehmet Kobya
Mining activities in addition to the geology of Mustafakemalpaşa catchment have for long been linked to its deteriorating water and sediment quality. This study assessed contamination levels of heavy metals and other major elements (Pb, As, B, Cd, Zn, Cr, Mo, Co, Ni, Cu, and Ag) in surface sediments of the area, and identified possible pollution sources. Sediment quality indicators, such as contamination factor (CF), enrichment factor (EF), geo-accumulation index (Igeo ) and sediment quality guidelines were used, in addition to multivariate statistical technics; Pearson Correlation Matrix (PCM), Principal Component Analysis (PCA) and Hierarchical Cluster Analysis (HCA)...
June 7, 2018: Chemosphere
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