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December 2017: American Journal on Addictions
Julius Motuzas, Martin Drobek, Dana L Martens, Cyril Vallicari, Anne Julbe, João C Diniz da Costa
Environmentally emerging micro-pollutant, caffeine, was mineralized (i.e., full degradation) by the isomorphic incorporation of Fe into silicalite-1 (mordenite framework inverted (MFI) structure zeolite) through a microwave synthesis method. The Fe incorporation conferred mesopore formation that facilitated caffeine access and transport to the MFI zeolite structure. Increasing the Fe content favored the formation of Fe(O)4 sites within the MFI structure. The catalytic activity for the degradation of caffeine increased as a function of Fe(O)4 sites via a Fenton-like heterogeneous reaction, otherwise not attainable using Fe-free pure MFI zeolites...
November 21, 2017: Environmental Science and Pollution Research International
Nehal Mohamed Ibrahim Saloum, Hayley Wurtz Hunt, Shaimaa Abdelhassib Fadl
This is the 46th installment of a series that will highlight one case per publication issue from the bank of cases available online as part of the American Society of Emergency Radiology (ASER) educational resources. Our goal is to generate more interest in and use of our online materials. To view more cases online, please visit the ASER Core Curriculum and Recommendations for Study online at: .
November 21, 2017: Emergency Radiology
Dong Wook Lee, Yun-Joo Yoo, Md Abdur Razzak, Inhwan Hwang
Chloroplasts import many preproteins that can be classified based on their physicochemical properties. The cleavable N-terminal transit peptide (TP) of chloroplast preproteins contains all of the information required for import into chloroplasts through Toc/Tic translocons. The question of whether and how the physicochemical properties of preproteins affect TP-mediated import into chloroplasts has not been elucidated. Here, we present evidence that proline residues in TP mediate efficient translocation through the chloroplast envelope membranes for proteins containing transmembrane domains (TMDs) or proteins prone to aggregation...
November 20, 2017: Plant Physiology
Xing-Pan Guo, Yi Yang, Da-Pei Lu, Zuo-Shun Niu, Jing-Nan Feng, Yu-Ru Chen, Fei-Yun Tou, Emily Garner, Jiang Xu, Min Liu, Michael F Hochella
Biofilms are ubiquitous throughout aquatic environments and they are thought to promote the acquisition and dissemination of antibiotic resistant genes (ARGs). This study focused on the occurrence and distribution of five types of ARG in naturally-occurring biofilms, in comparison to associated sediment and water samples, from the Yangtze Estuary, which borders the meta-city of Shanghai, China. The detection frequency and abundances of most ARGs showed the following order: biofilm > sediment > water, which can be attributed to a high level of antibiotics and metals that can accelerate the generation and propagation of ARGs in biofilms...
November 13, 2017: Water Research
Muhammad Saleem Arif, Muhammad Riaz, Sher Muhammad Shahzad, Tahira Yasmeen, Muhammad Ashraf, Muhammad Siddique, Muhammad Salman Mubarik, Luca Bragazza, Alexandre Buttler
A field study was conducted to test the potential of 5-year consecutive application of fresh industrial sludge (FIS) and composted industrial sludge (CIS) to restore soil functions at surface (0-15cm) and subsurface (15-30cm) of the degraded agricultural land. Sludge amendments increased soil fertility parameters including total organic carbon (TOC), soil available nitrogen (SAN), soil available phosphorus (SAP) and soil available potassium (SAK) at 0-15cm depth. Soil enzyme activities i.e. dehydrogenase (DHA), β-glucosidase (BGA) and alkaline phosphatase (ALp) were significantly enhanced by FIS and CIS amendments in surface soil...
November 17, 2017: Science of the Total Environment
W A M Hijnen, R Schurer, J A Bahlman, H A M Ketelaars, R Italiaander, A van der Wal, P W J J van der Wielen
It is possible to distribute drinking water without a disinfectant residual when the treated water is biologically stable. The objective of this study was to determine the impact of easily and slowly biodegradable compounds on the biostability of the drinking water at three full-scale production plants which use the same surface water, and on the regrowth conditions in the related distribution systems. Easily biodegradable compounds in the drinking water were determined with AOC-P17/Nox during 2012-2015. Slowly biodegradable organic compounds measured as particulate and/or high-molecular organic carbon (PHMOC), were monitored at the inlet and after the different treatment stages of the three treatments during the same period...
November 6, 2017: Water Research
Usman Ali, Rahat Riaz, Andrew James Sweetman, Kevin C Jones, Jun Li, Gan Zhang, Riffat Naseem Malik
Black carbon and total organic carbon (TOC) along with organochlorines (OCs) were analyzed in soils from four sampling zones of Lesser Himalayan Region based on source proximity/anthropogenic influences along the altitude. CTO-375 method was used for BC analysis while OCs were analyzed by GC-MS/MS system. BC and TOC ranged between 0.16-1.77 and 6.8-41.3 mg g(-1) while those of OCPs and PCBs ranged between 0.69 and 5.77 and 0.12-2.55 ng g(-1), respectively. ∑DDTs were the dominant (87.9%) among OCPs while tri- and tetra- (65...
November 16, 2017: Environmental Pollution
Jingxia Weng, Huichao Jia, Bing Wu, Bingcai Pan
Ozonation is a promising option to treat reverse osmosis concentrate (ROC). However, a systematic understanding and assessment of ozonation on toxicity reduction is insufficient. In this study, ROC sampled from a typical industrial park wastewater treatment plant of China was fractionated into hydrophobic acid (HOA), hydrophobic base (HOB), hydrophobic neutral (HON), and hydrophilic fraction (HI). Systematic bioassays covering bacteria, algae, fish, and human cell lines were conducted to reveal the role of ozonation in toxicity variation of the four ROC fractions...
October 10, 2017: Chemosphere
Ninad Oke, Swati Singh, Anurag Garg
The bleaching effluent discharged from a pulp and paper mill contains chlorinated organic compounds which are toxic to living matter. Physicochemical treatments such as coagulation and different advanced oxidation processes (AOPs) were employed for combined bleaching effluent generated from the first two stages (i.e. chlorination and alkali extraction) (pH = 3.5, chemical oxygen demand (COD) = 1,920 mg/L, and total organic carbon (TOC) = 663 mg/L). At optimum conditions (pH = 7.5, polyaluminium chloride (PAC) dose = 3...
November 2017: Water Science and Technology: a Journal of the International Association on Water Pollution Research
Baolin Hou, Renjian Deng, Bozhi Ren, Zhi Li
A novel type of catalytic particle electrode (SAC-Fe) was developed from sewage sludge and iron sludge via a facile method. The catalytic particle electrodes (CPEs) were also supposed to be heterogeneous catalyst for electro-Fenton (EF). The CPEs were characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD) and Fourier transform infrared spectroscopy (FTIR). SAC-Fe showed superior porous structure and higher adsorption capacity and catalytic activity than Fe3O4 magnetic nanoparticles. Catechol and total organic carbon (TOC) removal efficiency can reach 96...
November 2017: Water Science and Technology: a Journal of the International Association on Water Pollution Research
Haoran Dong, Zhao Jiang, Cong Zhang, Junmin Deng, Kunjie Hou, Yujun Cheng, Lihua Zhang, Guangming Zeng
This study investigated the degradation of tetracycline (TC) by Fe/Ni bimetallic nanoparticles (Fe/Ni BNPs) and nanoscale zero-valent iron (NZVI) in aqueous solution. Results revealed that Fe/Ni BNPs showed much better performance than NZVI. The effects of pH (5, 7 and 9), initial TC concentration and competitive anions (NO3(-), H2PO4(-), SO4(2-) and HCO3(-)) on the removal of TC by Fe/Ni BNPs were investigated. The results indicated that the removal of TC was higher under acidic conditions and the reaction reached equilibrium more quickly at lower initial TC concentrations...
November 8, 2017: Journal of Colloid and Interface Science
Julian F Guest, Jaime Esteban, Anton G Manganelli, Andrea Novelli, Giuliano Rizzardini, Miquel Serra
OBJECTIVE: This NMA compared the efficacy and safety between IV antibiotics that are used in the current standard of care for managing adult patients (≥18 years of age) with ABSSSI. METHODS: Comparators were chosen on the basis that both direct and indirect comparisons between the interventions of interest could be performed. Outcomes of the analysis were selected on the basis that they are frequently measured and reported in trials involving ABSSSI patients, and only published randomised control trials of any size and duration and with any blinding status were eligible for inclusion in the analysis...
2017: PloS One
Marin Kovacic, Nina Kopcic, Hrvoje Kusic, Urska Lavrencic Stangar, Dionysios D Dionysiou, Ana Loncaric Bozic
One of the most important features of photocatalytic materials intended to be used for water treatment is their long-term stability. The study is focused on the application of thermal and chemical treatments for the reactivation of TiO2-SnS2 composite photocatalyst, prepared by hydrothermal synthesis and immobilized on the glass support using titania/silica binder. Such a catalytic system was applied in solar-driven treatment, solar/TiO2-SnS2/H2O2, for the purification of water contaminated with diclofenac (DCF)...
November 10, 2017: Environmental Science and Pollution Research International
Rui Zhou, Tingting Li, Yu Su, Taigang Ma, Lijian Zhang, Hejun Ren
Metronidazole (MNZ) is widely used in clinical applications and animal feed as an antibiotic agent and additive, respectively. Widespread occurrence of MNZ in wastewater treatment and hospital effluents has been reported. In this study, the mechanism of MNZ degradation in aqueous solutions via thermally activated persulfate (TAP) process was established under different conditions. The kinetic model was derived for MNZ degradation and followed pseudo-first-order reaction kinetics and was consistent with the model fitted by experimental data (R (2) > 98...
November 10, 2017: Environmental Science and Pollution Research International
Usman Ali, Andrew James Sweetman, Rahat Riaz, Jun Li, Gan Zhang, Kevin C Jones, Riffat Naseem Malik
Black carbon (BC) and total organic carbon (TOC) along with their relationship with organochlorine pesticides (OCPs) and polychlorinated biphenyls (PCBs) were assessed in Lesser Himalayan Region (LHR) in different altitudinal zones based on anthropogenic influence/source proximity under the scope of this study. Results revealed the concentrations of BC, TOC, OCPs and PCBs varied between 0.3 and 43.5mgg(-1), 1.7-65.4mgg(-1), 0.59-3.64ngg(-1) and 0.01-1.31ngg(-1), respectively. Spatial distribution trends have shown higher levels of OCPs and PCBs contamination near populated and urban areas along the altitude...
November 7, 2017: Science of the Total Environment
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No abstract text is available yet for this article.
December 2017: Anatomical Record: Advances in Integrative Anatomy and Evolutionary Biology
Ming-Yi Ren, Li-Yuan Yang, Long-Feng Wang, Xue-Mei Han, Jie-Rui Dai, Xu-Gui Pang
Surface soil samples collected from Nansi Lake catchment were analyzed for mercury (Hg) to determine its spatial trends and environmental impacts. Results showed that the average soil Hg contents were 0.043 mg kg(-1). A positive correlation was shown between TOC and soil Hg contents. The main type of soil with higher TOC contents and lower pH values showed higher soil Hg contents. Soil TOC contents and CV values were both higher in the eastern catchment. The eastern part of the catchment, where the industry is developed, had relatively high soil Hg contents and a banding distribution of high Hg contents was corresponded with the southwest-northeast economic belt...
November 9, 2017: Environmental Science and Pollution Research International
Kaiyi Wu, Fengzhen Zhang, Haizhen Wu, Chaohai Wei
Coking wastewater after biological treatment still possesses potential environmental risk and should be mineralized further. This work focused on the mineralization of bio-treated coking wastewater using catalytic ozonation by NiO. First, oxalic acid, the typical by-product of advanced oxidation process (AOPs), was used to test the catalytic performance of NiOs, prepared by modified hydrothermal methods upon addition of different surfactants. This demonstrated that NiO upon addition of hexadecyltrimethylammonium (CTAB) had the best catalytic activity, due to its high concentration surface hydroxyl density and strong stability...
November 9, 2017: Environmental Science and Pollution Research International
Antonio Girona-García, David Badía-Villas, Clara Martí-Dalmau, Oriol Ortiz-Perpiñá, Juan Luis Mora, Cecilia M Armas-Herrera
Prescribed burning has been readopted in the last decade in the Central Pyrenees to stop the regression of subalpine grasslands in favour of shrublands, dominated among others by Echinospartum horridum (Vahl) Rothm. Nevertheless, the effect of this practice on soil properties is uncertain. The aim of this work was to analyse the effects of these burnings on topsoil organic matter and biological properties. Soil sampling was carried out in an autumnal prescribed fire in Buisán (NE-Spain, November 2015). Topsoil was sampled at 0-1cm, 1-2cm and 2-3cm depth in triplicate just before (U), ~1h (B0), 6months (B6) and 12months (B12) after burning...
November 6, 2017: Science of the Total Environment
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