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https://www.readbyqxmd.com/read/28938141/amendment-damages-the-function-of-continuous-flooding-in-decreasing-cd-and-pb-uptake-by-rice-in-acid-paddy-soil
#1
Xinxin Ye, Hongying Li, Ligan Zhang, Rushan Chai, Renfeng Tu, Hongjian Gao
Combinations of remediation technologies are needed to solve the problem of soil contamination in paddy rice, due to multiple potential toxic elements (PTEs). Two potential mitigation methods, water management and in-situ remediation by soil amendment, have been widely used in treatment of PTE-polluted paddy soil. However, the interactive relationship between soil amendment and water management, and its influence on the accumulation of PTEs in rice are poorly understood. Greenhouse pot experiments were conducted to examine the effects of phosphate amendment on Cd and Pb availability in soil and their influence on Cd and Pb uptake into rice, on Fe and P availability in soil, and on the alteration of Fe amount and compartment on root surface among different water management strategies...
September 19, 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/28937161/cold-sprayed-wo3-and-tio2-electrodes-for-photoelectrochemical-water-and-methanol-oxidation-in-renewable-energy-applications
#2
Christoph Haisch, Jenny Schneider, Manuel Fleisch, Henning Gutzmann, Thomas Klassen, Detlef W Bahnemann
Films prepared by cold spray have potential applications as photoanodes in electrochemical water splitting and waste water purification. In the present study cold sprayed photoelectrodes produced with WO3 (active under visible light illumination) and TiO2 (active under UV illumination) on titanium metal substrates were investigated as photoanodes for the oxidation of water and methanol, respectively. Methanol was chosen as organic model pollutant in acidic electrolytes. Main advantages of the cold sprayed photoelectrodes are the improved metal-semiconductor junctions and the superior mechanical stability...
September 22, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28935241/fluorescence-based-multi-parameter-approach-to-characterize-dynamics-of-organic-carbon-faecal-bacteria-and-particles-at-alpine-karst-springs
#3
Simon Frank, Nadine Goeppert, Nico Goldscheider
Karst springs, especially in alpine regions, are important for drinking water supply but also vulnerable to contamination, especially after rainfall events. This high variability of water quality requires rapid quantification of contamination parameters. Here, we used a fluorescence-based multi-parameter approach to characterize the dynamics of organic carbon, faecal bacteria, and particles at three alpine karst springs. We used excitation emission matrices (EEMs) to identify fluorescent dissolved organic material (FDOM)...
September 18, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28934709/toxicity-of-ammonia-cadmium-and-nitrobenzene-to-four-local-fishes-in-the-liao-river-china-and-the-derivation-of-site-specific-water-quality-criteria
#4
Zhihong Liu, Xiaojun Li, Peidong Tai, Lizong Sun, Honghong Yuan, Xiaonan Yang
Water quality criteria (WQC) are considered to be an effective management tool for protecting aquatic environments. To derive site-specific WQC for an area, local data based on local species are essential to improve the applicability of WQC derived. Due to the paucity of local fish data available for the development of site-specific WQC for the Liao River, China, four local and widespread fishes (Pseudorasbora parva, Abbottina liaoningensis, Ctenogobius giurinus, and Misgurnus anguillicaudatus) were chosen to test their sensitivities to ammonia, cadmium and nitrobenzene...
September 18, 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/28934708/different-partition-of-polycyclic-aromatic-hydrocarbon-on-environmental-particulates-in-freshwater-microplastics-in-comparison-to-natural-sediment
#5
Wenfeng Wang, Jun Wang
Microplastics pollution in the aquatic ecosystems has aroused increasing concerns in recent years. Though microplastics are known to sorb organic contaminants from water, the interaction mechanisms between microplastics and organic chemicals are not yet well understood. Here we investigated the partition characteristics of phenanthrene (Phe) in three mass-produced plastic particles, including polyethylene (PE), polystyrene (PS) and polyvinylchloride (PVC), and one natural sediment, as a comparison. The sorption kinetics of Phe onto microplastics and natural sediment were successfully described by the pseudo-second-order model (R(2) > 0...
September 18, 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/28934707/investigating-sources-and-sinks-of-n2o-expression-from-freshwater-microbial-communities-in-urban-watershed-sediments
#6
Christopher Weisener, Jumin Lee, Subba Rao Chaganti, Thomas Reid, Nick Falk, Ken Drouillard
Wastewater treatment plants (WWTPs) serve as point-source inputs for a variety of nutrients often dominated by nitrogenous compounds as a result of anthropogenic influence. These effluents can impact biogeochemical cycles in freshwater estuaries, influencing microbial communities in both the water and sediment compartments. To assess the impact of point source nutrients, a transect of sediment and pore water samples were collected from 4 locations in the Little River Sub-watershed including locations above and below the Little River Pollution Control Plant (LRPCP)...
September 11, 2017: Chemosphere
https://www.readbyqxmd.com/read/28934645/graphene-a-new-activator-of-sodium-persulfate-for-the-advanced-oxidation-of-parabens-in-water
#7
Leonidas Bekris, Zacharias Frontistis, George Trakakis, Lamprini Sygellou, Costas Galiotis, Dionissios Mantzavinos
Graphene was successfully employed as a catalyst for the activation of sodium persulfate, towards the effective degradation of propylparaben, an emerging micro-pollutant, representative of the parabens family. A novel process is proposed which utilizes a commercial graphene nano-powder as the catalyst and sodium persulfate as the oxidizing agent. It was found that over 95% of micro-pollutant degradation occurs within 15 min of reaction time. The effects of catalyst loading (75 mg/L to 1 g/L), sodium persulfate (SPS) concentration (10 mg/L to 1 g/L), initial solution pH (3-9) and initial paraben concentration (0...
September 13, 2017: Water Research
https://www.readbyqxmd.com/read/28934546/oxygen-vacancy-promoted-heterogeneous-fenton-like-degradation-of-ofloxacin-at-ph-3-2-9-0-by-cu-substituted-magnetic-fe3o4-feooh-nanocomposite
#8
Hang Jin, Xike Tian, Yulun Nie, Zhaoxin Zhou, Chao Yang, Yong Li, Liqiang Lu
To develop an ultra-efficient and reusable heterogeneous Fenton-like catalyst at a wide working pH range is a great challenge for its application in practical water treatment. We report an oxygen vacancy promoted heterogeneous Fenton-like reaction mechanism and an unprecedented ofloxacin (OFX) degradation efficiency of Cu doped Fe3O4@FeOOH magnetic nanocomposite. Without the aid of external energy, OFX was always completely removed within 30 min at pH 3.2-9.0. Compared with Fe3O4@FeOOH, the pseudo-first-order reaction constant was enhanced by 10 times due to Cu substitution (9...
September 21, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28934127/removal-of-phenolic-compounds-from-water-using-sewage-sludge-based-activated-carbon-adsorption-a-review
#9
REVIEW
Nuhu Dalhat Mu'azu, Nabeel Jarrah, Mukarram Zubair, Omar Alagha
Due to their industrial relevance, phenolic compounds (PC) are amongst the most common organic pollutants found in many industrial wastewater effluents. The potential detrimental health and environmental impacts of PC necessitate their removal from wastewater to meet regulatory discharge standards to ensure meeting sustainable development goals. In recent decades, one of the promising, cost-effective and environmentally benign techniques for removal of PC from water streams has been adsorption onto sewage sludge (SS)-based activated carbon (SBAC)...
September 21, 2017: International Journal of Environmental Research and Public Health
https://www.readbyqxmd.com/read/28933756/a-disposable-amperometric-sensor-based-on-high-performance-pedot-pss-ionic-liquid-nanocomposite-thin-film-modified-screen-printed-electrode-for-the-analysis-of-catechol-in-natural-water-samples
#10
Francis D Krampa, Yaw Aniweh, Gordon A Awandare, Prosper Kanyong
A conducting polymer-based composite material of poly(3,4-ethylenedioxythiophene) (PEDOT): poly(4-styrenesulfonate) (PSS) doped with different percentages of a room temperature ionic liquid (IL), 1-ethyl-3-methylimidazolium tetrafluoroborate ([EMIM][BF₄]), was prepared and a very small amount of the composite (2.0 µL) was drop-coated on the working area of a screen-printed carbon electrode (SPCE). The SPCE, modified with PEDOT:PSS/IL composite thin-film, was characterized by cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS), scanning electron microscopy (SEM), profilometry and sessile contact angle measurements...
July 26, 2017: Sensors
https://www.readbyqxmd.com/read/28933555/a-water-stable-cl-ag14-cluster-based-metal-organic-open-framework-for-dichromate-trapping-and-bacterial-inhibition
#11
Shan-Shan Zhang, Xin Wang, Hai-Feng Su, Lei Feng, Zhi Wang, Wen-Qiang Ding, Vladislav A Blatov, Mohamedally Kurmoo, Chen-Ho Tung, Di Sun, Lan-Sun Zheng
Decoding the principles of cluster-based framework assembly at the molecular level remains a persistent challenge. Herein, we isolated and characterized a novel water-stable three-dimensional (3D) metal-organic open framework [Cl@Ag14(cPrC≡C)10Cl2·(p-TOS)·1/3H2O]n (SD/Ag14, cPrC≡CH = cyclopropylacetylene; p-TOS = p-toluenesulfonate), which contains a chloride-templated Ag14 cluster as building block. For SD/Ag14, one chloride acts as the template to shape the Ag14 cluster and the other bridges the clusters to a 3D pcu-h open framework...
September 21, 2017: Inorganic Chemistry
https://www.readbyqxmd.com/read/28933021/sources-composition-and-spectroscopiccharacteristics-of-dissolved-organic-matter-extractedfrom-sediments-in-an-anthropogenic-impacted-riverin-southeastern-china
#12
Tongbin Zhu, Pengfei Duan, Jianguo He, Miaomiao Zhao, Ming Li
The fluorescence and ultraviolet spectroscopic characteristics of dissolved organic matter extracted from sediments in an anthropogenic-impacted river (Hao River) in Southeastern China were analyzed in the current study. Excitation-emission matrix (EEM) fluorescence combined with parallel factor analysis (PARAFAC) was conducted to analyze the sources and composition of dissolved organic matter (DOM). The average dissolved organic carbon (DOC) concentrations of all samples at depths of 0-10, 10-20, and 20-30 cm were 317, 319, and 319 mg kg(-1) dry weight, respectively...
September 20, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28932619/extraction-of-phosphate-from-polluted-waters-using-calcium-alginate-beads-doped-with-active-carbon-derived-from-a-aspera-plant-as-adsorbent
#13
Ravulapalli Sujitha, Kunta Ravindhranath
An adsorbent prepared by entrapping active carbon derived from the stems of Achyranthes aspera plant in the calcium alginate beads (CABAA) has been investigated for its adsorption nature towards the removal of phosphate by varying various physicochemical parameters. Surface morphological studies are made using FTIR, XRD, FESEM, and EDX. The sorption mechanism is analyzed using Freundlich, Langmuir, Dubinin-Radushkevich, and Temkin adsorption isotherms. The adsorption kinetics is found to follow the pseudo-second-order model...
2017: Journal of Analytical Methods in Chemistry
https://www.readbyqxmd.com/read/28931793/itai-itai-disease-lessons-from-the-investigations-of-environmental-epidemiology-conducted-in-the-1970-s-with-special-reference-to-the-studies-of-the-toyama-institute-of-health
#14
Keiko Aoshima
The outbreak of itai-itai disease, which is the most severe stage of chronic cadmium poisoning, has occurred in the cadmium-polluted Jinzu River basin in Toyama. In this area, the river was contaminated by slags from a mine upstream; consequently, the soil in rice paddies became polluted with heavy metals including cadmium through irrigation water streams from around 1910 to the 1960s. The inhabitants of the Jinzu River basin used the river water for drinking and cooking until around 1960. In this paper, we review the geographical features of the Jinzu River basin and the endemic area of itai-itai disease, and reevaluated the studies conducted in 1970's by the Toyama Institute of Health, because these studies have revealed a clear relationship between renal dysfunction or occurrence of itai-itai disease and exposure to cadmium through irrigation water streams...
2017: Nihon Eiseigaku Zasshi. Japanese Journal of Hygiene
https://www.readbyqxmd.com/read/28929352/the-relative-sensitivity-of-freshwater-species-to-antimony-iii-implications-for-water-quality-guidelines-and-ecological-risk-assessments
#15
Maximilian Obinna Obiakor, Matthew Tighe, Zhen Wang, Chigozie Damian Ezeonyejiaku, Lily Pereg, Susan C Wilson
Antimony (Sb) is a pollutant in many jurisdictions, yet its threat to aquatic biota is unclear. Water quality guidelines (WQGs) for Sb are not well established and large uncertainty factors are commonly applied in derivation. We constructed freshwater species sensitivity distributions (SSDs) for Sb(III) using available acute toxicity data sourced from temperate and tropical regional studies. A tiered ecological risk assessment (ERA) approach using risk quotients (RQs) was applied for characterisation of risks presented by Sb(III) concentrations measured in the freshwater environment...
September 19, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28929288/complex-organic-pollutant-mixtures-originating-from-industrial-and-municipal-emissions-in-surface-waters-of-the-megacity-jakarta-an-example-of-a-water-pollution-problem-in-emerging-economies
#16
Larissa Dsikowitzky, Lukas Hagemann, Dwiyitno, Farida Ariyani, Hari Eko Irianto, Jan Schwarzbauer
During the last decades, the global industrial production partly shifted from industrialized nations to emerging and developing countries. In these upcoming economies, the newly developed industrial centers are generally located in densely populated areas, resulting in the discharge of often only partially treated industrial and municipal wastewaters into the surface waters. There is a huge gap of knowledge about the composition of the complex organic pollutant mixtures occurring in such heavily impacted areas...
September 19, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28929280/ecology-of-scedosporium-species-present-knowledge-and-future-research
#17
A Rougeron, S Giraud, A Alastruey-Izquierdo, J Cano-Lira, J Rainer, A Mouhajir, S Le Gal, G Nevez, W Meyer, J P Bouchara
The genus Scedosporium, which comprises at least five clinically relevant species, i.e. Scedosporium apiospermum, Scedosporium boydii, Scedosporium aurantiacum, Scedosporium dehoogii and Scedosporium minutisporum, ranks the second among the filamentous fungi colonizing the airways of patients with cystic fibrosis (CF). This colonization of the airways is thought to contribute to the inflammatory reaction leading to a progressive deterioration of the lung function. Additionally, these colonizing fungi may lead to severe disseminated infections in case of lung transplantation...
September 19, 2017: Mycopathologia
https://www.readbyqxmd.com/read/28927887/epidermal-overexpression-of-xenobiotic-receptor-pxr-impairs-the-epidermal-barrier-and-triggers-th2-immune-response
#18
Andreas Elentner, Matthias Schmuth, Nikolaos Yannoutsos, Thomas O Eichmann, Robert Gruber, Franz Pw Radner, Martin Hermann, Barbara Del Frari, Sandrine Dubrac
The skin is in daily contact with environmental pollutants, but the long-term effects of such exposure remain under-investigated. Many of these toxins bind and activate the pregnane x receptor (PXR), a ligand-activated transcription factor that regulates genes central to xenobiotic metabolism. The objective of this work was to investigate the effect of constitutive activation of PXR in the basal layer of the skin to mimic repeated skin exposure to noxious molecules. We designed a transgenic mouse model which overexpresses the human PXR gene linked to the herpes simplex VP16 domain under the control of the keratin 14 promoter...
September 16, 2017: Journal of Investigative Dermatology
https://www.readbyqxmd.com/read/28926812/isotope-and-microbiome-data-provide-complementary-information-to-identify-natural-nitrate-attenuation-processes-in-groundwater
#19
Elena Hernández-Del Amo, Anna Menció, Frederic Gich, Josep Mas-Pla, Lluís Bañeras
Natural attenuation processes alleviate the impact of fertilization practices on groundwater resources. Therefore, identifying the occurrence of denitrification has become a requirement for water quality management. Several approaches are useful for this purpose, such as isotopic and microbiological methods, each of them providing distinct but complementary information about denitrification reactions, attenuation rates and their occurrence in the aquifer. In this paper, we investigate the contribution of both approaches to describe denitrification in a consolidated rock aquifer (limestone and marls), with a porosity related to fracture networks located in the northeastern sector of the Osona basin (NE Spain)...
September 16, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28925595/determination-of-crassphage-in-water-samples-and-applicability-for-tracking-human-faecal-pollution
#20
Cristina García-Aljaro, Elisenda Ballesté, Maite Muniesa, Juan Jofre
In recent decades, considerable effort has been devoted to finding microbial source-tracking (MST) markers that are suitable to assess the health risks of faecally polluted waters, with no universal marker reported so far. In this study, the abundance and prevalence of a crAssphage-derived DNA marker in wastewaters of human and animal origins were studied by a new qPCR assay with the ultimate aim of assessing its potential as an MST marker. crAssphage showed up to 10(6) GC/ml in the sewage samples of human origin, in both the total DNA and the viral DNA fraction...
September 19, 2017: Microbial Biotechnology
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