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[PMID]:29505518
[Au] Autor:Zhang S; Huang Q; Xu B; Ma J; Cao G; Pei F
[Ad] Endereço:Department of Orthopaedics, West China Hospital, Sichuan University, Chengdu, Sichuan, China.
[Ti] Título:Effectiveness and safety of an optimized blood management program in total hip and knee arthroplasty: A large, single-center, retrospective study.
[So] Source:Medicine (Baltimore);97(1):e9429, 2018 Jan.
[Is] ISSN:1536-5964
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Little has been published on blood management in total hip and knee arthroplasty (THA and TKA, respectively) patients focusing on both hematopoiesis and hemostasis. Our aim was to explore the effectiveness and safety of an optimized blood management program in THA and TKA patients in a large, single-center, retrospective study.We retrospectively reviewed consecutive primary unilateral THA and TKA patients' data at our institution through the National Health Database. They were divided into 3 groups according to an optimized blood management program: group A-combined use of intravenous and topical tranexamic acid (TXA); group B-use of recombinant human erythropoietin (rHuEPO) and iron supplements in addition to treatments in group A; group C-use of additional multiple boluses of TXA in addition to treatments in group B. The primary outcomes were hemoglobin (Hb) drop and calculated total blood loss (TBL). Other outcome measurements such as transfusion rate, postoperative length of stay (PLOS), venous thromboembolism (VTE), and mortality were also compared.From 2014 to 2016, a total of 1907 unilateral THA (986 in group A, 745 in group B, and 176 in group C) and 1505 unilateral TKA (795 in group A, 556 in group B, and 154 in group C) procedures were conducted at our institution. The Hb drop, calculated TBL, and PLOS in group C were significantly lower than those in groups A and B for THA and TKA patients. The transfusion rate in group C was also significantly less than in groups A and B for THA patients, while it was similar in groups A and B for TKA patients. No patients in group C received a transfusion. A significant difference was not detected in the incidence of deep vein thrombosis. No episode of symptomatic pulmonary embolism or all-cause mortality occurred within 30 days postoperatively.The current retrospective study suggests that for patients receiving primary unilateral THA or TKA, multiple boluses of intravenous TXA combined with topical TXA, rHuEPO, and iron supplements can reduce the calculated TBL, Hb drop, transfusion rate, and PLOS without increasing the incidence of VTE or mortality.
[Mh] Termos MeSH primário: Anemia/tratamento farmacológico
Antifibrinolíticos/administração & dosagem
Perda Sanguínea Cirúrgica/prevenção & controle
Eritropoetina/uso terapêutico
Ferro/uso terapêutico
Oligoelementos/uso terapêutico
Ácido Tranexâmico/administração & dosagem
[Mh] Termos MeSH secundário: Administração Intravenosa
Administração Tópica
Adulto
Idoso
Anemia/etiologia
Artroplastia de Quadril/efeitos adversos
Artroplastia do Joelho/efeitos adversos
Feminino
Seres Humanos
Masculino
Meia-Idade
Proteínas Recombinantes/uso terapêutico
Estudos Retrospectivos
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Antifibrinolytic Agents); 0 (Recombinant Proteins); 0 (Trace Elements); 11096-26-7 (Erythropoietin); 6T84R30KC1 (Tranexamic Acid); E1UOL152H7 (Iron)
[Em] Mês de entrada:1803
[Cu] Atualização por classe:180309
[Lr] Data última revisão:
180309
[Sb] Subgrupo de revista:AIM; IM
[Da] Data de entrada para processamento:180306
[St] Status:MEDLINE
[do] DOI:10.1097/MD.0000000000009429


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[PMID]:29447176
[Au] Autor:Svefors P; Selling KE; Shaheen R; Khan AI; Persson LÅ; Lindholm L
[Ad] Endereço:International Maternal and Child Health, Department of Women's and Children's Health, Uppsala University, Uppsala, Sweden.
[Ti] Título:Cost-effectiveness of prenatal food and micronutrient interventions on under-five mortality and stunting: Analysis of data from the MINIMat randomized trial, Bangladesh.
[So] Source:PLoS One;13(2):e0191260, 2018.
[Is] ISSN:1932-6203
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:INTRODUCTION: Nutrition interventions may have favourable as well as unfavourable effects. The Maternal and Infant Nutrition Interventions in Matlab (MINIMat), with early prenatal food and micronutrient supplementation, reduced infant mortality and were reported to be very cost-effective. However, the multiple micronutrients (MMS) supplement was associated with an increased risk of stunted growth in infancy and early childhood. This unfavourable outcome was not included in the previous cost-effectiveness analysis. The aim of this study is to evaluate whether the MINIMat interventions remain cost-effective in view of both favourable (decreased under-five-years mortality) and unfavourable (increased stunting) outcomes. METHOD: Pregnant women in rural Bangladesh, where food insecurity still is prevalent, were randomized to early (E) or usual (U) invitation to be given food supplementation and daily doses of 30 mg, or 60 mg iron with 400 µg of folic acid, or MMS with 15 micronutrients including 30 mg iron and 400 µg of folic acid. E reduced stunting at 4.5 years compared with U, MMS increased stunting at 4.5 years compared with Fe60, while the combination EMMS reduced infant mortality compared with UFe60. The outcome measure used was disability adjusted life years (DALYs), a measure of overall disease burden that combines years of life lost due to premature mortality (under five-year mortality) and years lived with disability (stunting). Incremental cost effectiveness ratios were calculated using cost data from already published studies. RESULTS: By incrementing UFe60 (standard practice) to EMMS, one DALY could be averted at a cost of US$24. CONCLUSION: When both favourable and unfavourable outcomes were included in the analysis, early prenatal food and multiple micronutrient interventions remained highly cost effective and seem to be meaningful from a public health perspective.
[Mh] Termos MeSH primário: Transtornos do Crescimento/etiologia
Fenômenos Fisiológicos da Nutrição do Lactente/economia
Micronutrientes/uso terapêutico
[Mh] Termos MeSH secundário: Adulto
Bangladesh/epidemiologia
Pré-Escolar
Análise Custo-Benefício/métodos
Suplementos Nutricionais
Feminino
Ácido Fólico
Abastecimento de Alimentos
Transtornos do Crescimento/tratamento farmacológico
Transtornos do Crescimento/mortalidade
Seres Humanos
Lactente
Mortalidade Infantil
Fenômenos Fisiológicos da Nutrição do Lactente/efeitos dos fármacos
Fenômenos Fisiológicos da Nutrição do Lactente/fisiologia
Recém-Nascido
Ferro
Masculino
Micronutrientes/administração & dosagem
Política Nutricional
Gravidez
Cuidado Pré-Natal
Fenômenos Fisiológicos da Nutrição Pré-Natal
Oligoelementos
Vitaminas
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Nm] Nome de substância:
0 (Micronutrients); 0 (Trace Elements); 0 (Vitamins); 935E97BOY8 (Folic Acid); E1UOL152H7 (Iron)
[Em] Mês de entrada:1803
[Cu] Atualização por classe:180309
[Lr] Data última revisão:
180309
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:180216
[St] Status:MEDLINE
[do] DOI:10.1371/journal.pone.0191260


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[PMID]:29324800
[Au] Autor:Harrington-Kandt R; Stylianou E; Eddowes LA; Lim PJ; Stockdale L; Pinpathomrat N; Bull N; Pasricha J; Ulaszewska M; Beglov Y; Vaulont S; Drakesmith H; McShane H
[Ad] Endereço:Jenner Institute, University of Oxford, Oxford, United Kingdom.
[Ti] Título:Hepcidin deficiency and iron deficiency do not alter tuberculosis susceptibility in a murine M.tb infection model.
[So] Source:PLoS One;13(1):e0191038, 2018.
[Is] ISSN:1932-6203
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Tuberculosis (TB), caused by the macrophage-tropic pathogen Mycobacterium tuberculosis (M.tb) is a highly prevalent infectious disease. Since an immune correlate of protection or effective vaccine have yet to be found, continued research into host-pathogen interactions is important. Previous literature reports links between host iron status and disease outcome for many infections, including TB. For some extracellular bacteria, the iron regulatory hormone hepcidin is essential for protection against infection. Here, we investigated hepcidin (encoded by Hamp1) in the context of murine M.tb infection. Female C57BL/6 mice were infected with M.tb Erdman via aerosol. Hepatic expression of iron-responsive genes was measured by qRT-PCR and bacterial burden determined in organ homogenates. We found that hepatic Hamp1 mRNA levels decreased post-infection, and correlated with a marker of BMP/SMAD signalling pathways. Next, we tested the effect of Hamp1 deletion, and low iron diets, on M.tb infection. Hamp1 knockout mice did not have a significantly altered M.tb mycobacterial load in either the lungs or spleen. Up to 10 weeks of dietary iron restriction did not robustly affect disease outcome despite causing iron deficiency anaemia. Taken together, our data indicate that unlike with many other infections, hepcidin is decreased following M.tb infection, and show that hepcidin ablation does not influence M.tb growth in vivo. Furthermore, because even severe iron deficiency did not affect M.tb mycobacterial load, we suggest that the mechanisms M.tb uses to scavenge iron from the host must be extremely efficient, and may therefore represent potential targets for drugs and vaccines.
[Mh] Termos MeSH primário: Anemia Ferropriva/complicações
Modelos Animais de Doenças
Suscetibilidade a Doenças
Hepcidinas/deficiência
Mycobacterium tuberculosis/patogenicidade
Tuberculose/patologia
[Mh] Termos MeSH secundário: Animais
Feminino
Hepcidinas/genética
Homeostase
Ferro/metabolismo
Camundongos
Camundongos Endogâmicos BALB C
Camundongos Endogâmicos C57BL
Camundongos Knockout
Tuberculose/complicações
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Nm] Nome de substância:
0 (Hepcidins); E1UOL152H7 (Iron)
[Em] Mês de entrada:1803
[Cu] Atualização por classe:180309
[Lr] Data última revisão:
180309
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:180112
[St] Status:MEDLINE
[do] DOI:10.1371/journal.pone.0191038


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[PMID]:29214538
[Au] Autor:Akbarzade S; Chamsaz M; Rounaghi GH; Ghorbani M
[Ad] Endereço:Department of Chemistry, Faculty of Sciences, Ferdowsi University of Mashhad, Mashhad, Iran.
[Ti] Título:Zero valent Fe-reduced graphene oxide quantum dots as a novel magnetic dispersive solid phase microextraction sorbent for extraction of organophosphorus pesticides in real water and fruit juice samples prior to analysis by gas chromatography-mass spectrometry.
[So] Source:Anal Bioanal Chem;410(2):429-439, 2018 Jan.
[Is] ISSN:1618-2650
[Cp] País de publicação:Germany
[La] Idioma:eng
[Ab] Resumo:A selective and sensitive magnetic dispersive solid-phase microextraction (MDSPME) coupled with gas chromatography-mass spectrometry was developed for extraction and determination of organophosphorus pesticides (Sevin, Fenitrothion, Malathion, Parathion, and Diazinon) in fruit juice and real water samples. Zero valent Fe-reduced graphene oxide quantum dots (rGOQDs@ Fe) as a new and effective sorbent were prepared and applied for extraction of organophosphorus pesticides using MDSPME method. In order to study the performance of this new sorbent, the ability of rGOQDs@ Fe was compared with graphene oxide and magnetic graphene oxide nanocomposite by recovery experiments of the organophosphorus pesticides. Several affecting parameters in the microextraction procedure, including pH of donor phase, donor phase volume, stirring rate, extraction time, and desorption conditions such as the type and volume of solvents and desorption time were thoroughly investigated and optimized. Under the optimal conditions, the method showed a wide linear dynamic range with R-square between 0.9959 and 0.9991. The limit of detections, the intraday and interday relative standard deviations (n = 5) were less than 0.07 ngmL , 4.7, and 8.6%, respectively. The method was successfully applied for extraction and determination of organophosphorus pesticides in real water samples (well, river and tap water) and fruit juice samples (apple and grape juice). The obtained relative recoveries were in the range of 82.9%-113.2% with RSD percentages of less than 5.8% for all the real samples.
[Mh] Termos MeSH primário: Sucos de Frutas e Vegetais/análise
Grafite/química
Compostos Organofosforados/análise
Praguicidas/análise
Microextração em Fase Sólida/métodos
Poluentes Químicos da Água/análise
Água/análise
[Mh] Termos MeSH secundário: Cromatografia Gasosa-Espectrometria de Massas/métodos
Ferro/química
Limite de Detecção
Compostos Organofosforados/isolamento & purificação
Oxirredução
Óxidos/química
Praguicidas/isolamento & purificação
Pontos Quânticos/química
Poluentes Químicos da Água/isolamento & purificação
[Pt] Tipo de publicação:JOURNAL ARTICLE; VALIDATION STUDIES
[Nm] Nome de substância:
0 (Organophosphorus Compounds); 0 (Oxides); 0 (Pesticides); 0 (Water Pollutants, Chemical); 059QF0KO0R (Water); 7782-42-5 (Graphite); E1UOL152H7 (Iron)
[Em] Mês de entrada:1803
[Cu] Atualização por classe:180309
[Lr] Data última revisão:
180309
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:171208
[St] Status:MEDLINE
[do] DOI:10.1007/s00216-017-0732-9


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[PMID]:29175397
[Au] Autor:Dong G; Huang L; Wu X; Wang C; Liu Y; Liu G; Wang L; Liu X; Xia H
[Ad] Endereço:Shandong Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Shandong University, Jinan, 250100, China. Electronic address: 963722867@qq.com.
[Ti] Título:Effect and mechanism analysis of MnO on permeable reactive barrier (PRB) system for the removal of tetracycline.
[So] Source:Chemosphere;193:702-710, 2018 Feb.
[Is] ISSN:1879-1298
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:Effect of manganese dioxide (MnO ) on tetracycline (TC) removal/degradation in zero-valent iron (ZVI) based permeable reactive barrier (PRB) system was investigated. To analyze the role of MnO , three different PRB columns packed with ZVI, ZVI and a layer of MnO , and MnO were set up to investigate the removal effect and reaction mechanism of ZVI coupling with MnO on TC removal, respectively. The results show that the removal efficiencies of three PRB columns are 65%, 85%, and 50%, respectively. MnO could accelerate the transformation of Fe into Fe and combine with Fe to degrade TC in different reaction sites in the ZVI-MnO PRB system. Hydroxyl radicals (·OH) were produced in this process, which contributed to about 58.3% for the TC degradation. The UV-Vis spectrum demonstrated that A ring of TC was the main reaction site for interaction with Fe and the BCD rings were crucial for interactions with MnO . On the basis of intermediates identified by LC-ESI-MS, the ring structure of TC was opened, and low-molecular-weight compounds were produced in ZVI-MnO PRB system.
[Mh] Termos MeSH primário: Ferro/química
Compostos de Manganês/farmacologia
Óxidos/farmacologia
Tetraciclina/isolamento & purificação
[Mh] Termos MeSH secundário: Sítios de Ligação
Cromatografia Líquida
Estrutura Molecular
Espectrometria de Massas em Tandem
Tetraciclina/química
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Manganese Compounds); 0 (Oxides); E1UOL152H7 (Iron); F8VB5M810T (Tetracycline); TF219GU161 (manganese dioxide)
[Em] Mês de entrada:1803
[Cu] Atualização por classe:180309
[Lr] Data última revisão:
180309
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:171128
[St] Status:MEDLINE


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[PMID]:28837873
[Au] Autor:Kim J; Lee C; Lee SM; Lalhmunsiama; Jung J
[Ad] Endereço:Division of Environmental Science and Ecological Engineering, Korea University, Seoul 02841, Republic of Korea.
[Ti] Título:Chemical and toxicological assessment of arsenic sorption onto Fe-sericite composite powder and beads.
[So] Source:Ecotoxicol Environ Saf;147:80-85, 2018 Jan.
[Is] ISSN:1090-2414
[Cp] País de publicação:Netherlands
[La] Idioma:eng
[Ab] Resumo:Batch sorption and leaching of arsenic (1-30mgL ) on Fe-sericite composite powder and beads were investigated in this study. Fe-sericite composite powder was made from natural sericite modified with iron, and alginate was used to transform the powder into beads. The maximum sorption capacities of the Fe-sericite composite powder (15.04 and 13.21mgg for As(III) and As(V), respectively) were higher than those of the corresponding beads (9.02 and 7.11mgg for As(III) and As(V), respectively) owing to the higher specific surface area of the powder. In addition, the leaching amounts of As(III) from Fe-sericite composite beads (≤ 15.03%) were higher than those of the corresponding powder (≤ 5.71%). However, acute toxicity of As(III)-sorbed Fe-sericite composite beads toward Daphnia magna was not significantly different from that of the corresponding powder (p > 0.05). Considering higher uptake of the powder particles by the daphnids, Fe-sericite composite beads seem to be a more appropriate and safer sorbent for arsenic removal in practical application. Based on Fe content, Fe-sericite composite beads had similar or higher maximum sorption capacities (71.19 and 56.11mgg Fe for As(III) and As(V), respectively) than those of previously reported sorbents.
[Mh] Termos MeSH primário: Arseniatos/análise
Arsenitos/análise
Ferro/química
Dióxido de Silício/química
Poluentes Químicos da Água/análise
Purificação da Água/métodos
[Mh] Termos MeSH secundário: Adsorção
Alginatos/química
Animais
Arseniatos/toxicidade
Arsenitos/toxicidade
Daphnia/efeitos dos fármacos
Ácido Glucurônico/química
Ácidos Hexurônicos/química
Modelos Teóricos
Tamanho da Partícula
Pós
Propriedades de Superfície
Testes de Toxicidade Aguda
Poluentes Químicos da Água/toxicidade
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Alginates); 0 (Arsenates); 0 (Arsenites); 0 (Hexuronic Acids); 0 (Powders); 0 (Water Pollutants, Chemical); 0 (sericite); 7631-86-9 (Silicon Dioxide); 8A5D83Q4RW (Glucuronic Acid); 8C3Z4148WZ (alginic acid); E1UOL152H7 (Iron)
[Em] Mês de entrada:1803
[Cu] Atualização por classe:180309
[Lr] Data última revisão:
180309
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170825
[St] Status:MEDLINE


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[PMID]:29268646
[Au] Autor:Kaserer A; Stein P; Spahn GH; Spahn DR
[Ad] Endereço:1 Institut für Anästhesiologie, Universität und Universitätsspital Zürich, Zürich.
[Ti] Título:Patient Blood Management: Der Standard heute..
[So] Source:Ther Umsch;74(7):369-376, 2017.
[Is] ISSN:0040-5930
[Cp] País de publicação:Switzerland
[La] Idioma:ger
[Mh] Termos MeSH primário: Anemia Ferropriva/terapia
Anemia/terapia
Transfusão de Sangue/normas
Cuidados Intraoperatórios/normas
Monitorização Intraoperatória/métodos
[Mh] Termos MeSH secundário: Anemia/diagnóstico
Anemia Ferropriva/diagnóstico
Medicina Baseada em Evidências
Seres Humanos
Ferro
Resultado do Tratamento
[Pt] Tipo de publicação:JOURNAL ARTICLE; REVIEW
[Nm] Nome de substância:
E1UOL152H7 (Iron)
[Em] Mês de entrada:1803
[Cu] Atualização por classe:180308
[Lr] Data última revisão:
180308
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:171223
[St] Status:MEDLINE
[do] DOI:10.1024/0040-5930/a000928


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[PMID]:29194015
[Au] Autor:Tripathi P; A JL; Kapoor M
[Ad] Endereço:a Department of Protein Chemistry and Technology , CSIR-Central Food Technological Research Institute , Mysuru , Karnataka , India.
[Ti] Título:Phytase from Citrobacter koseri PM-7: Enhanced production using statistical method and application in ameliorating mineral bioaccessibility and protein digestibility of high-phytate food.
[So] Source:Prep Biochem Biotechnol;48(1):84-91, 2018 Jan 02.
[Is] ISSN:1532-2297
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:The present study was aimed at enhancing phytase (Phy-Ck) production from Citrobacter koseri PM-7 using response surface methodology (RSM) and improving the bioaccessibility of minerals (Fe and Zn) and protein digestibility in high-phytate food using Phy-Ck. A five-variable and three-level central composite design of RSM using wheat bran (6.681%, w/v), inoculum level (2.5%, v/v), and triton X-100 (0.2%, v/v) resulted in up to 5.57-fold (1.047 U/ml) improvement in Phy-Ck yield from C. koseri PM-7 when compared with fermentation media I and II. The model was successfully validated in the design space by taking a random set of variable combinations. Treatment of high-phytate food with partially purified Phy-Ck showed improvement in mineral bioaccessibility maximally for defatted sesame flour (DSF) (Fe 45.5%; Zn 50.7%) followed by wheat flour (WF) (Fe 13.5%; Zn 14.4%), green gram flour (GGF) (Fe 0.7%; Zn 3.8%) and defatted groundnut flour (DGF) (Zn 5.6%). The in vitro protein digestibility (IVPD) of WF increased from 48.83 to 65.04%, GGF from 45.04 to 57.12%, and DSF from 47.34 to 55.7% after Phy-Ck treatment.
[Mh] Termos MeSH primário: 6-Fitase/metabolismo
Citrobacter koseri/enzimologia
[Mh] Termos MeSH secundário: Ração Animal/análise
Fibras na Dieta/análise
Fermentação
Farinha/análise
Ferro/metabolismo
Ácido Fítico/análise
Ácido Fítico/metabolismo
Proteólise
Triticum/química
Zinco/metabolismo
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Dietary Fiber); 7IGF0S7R8I (Phytic Acid); E1UOL152H7 (Iron); EC 3.1.3.26 (6-Phytase); J41CSQ7QDS (Zinc)
[Em] Mês de entrada:1803
[Cu] Atualização por classe:180308
[Lr] Data última revisão:
180308
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:171202
[St] Status:MEDLINE
[do] DOI:10.1080/10826068.2017.1405024


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[PMID]:28278779
[Au] Autor:Lominchar MA; Rodríguez S; Lorenzo D; Santos N; Romero A; Santos A
[Ad] Endereço:a Dpto. Ingeniería Química, Facultad CC, Químicas , Universidad Complutense de Madrid , Madrid , Spain.
[Ti] Título:Phenol abatement using persulfate activated by nZVI, H O and NaOH and development of a kinetic model for alkaline activation.
[So] Source:Environ Technol;39(1):35-43, 2018 Jan.
[Is] ISSN:0959-3330
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:Three persulfate (PS) activation methods (nanoparticles of zero-valent iron (nZVI), hydrogen peroxide and alkali) were compared using phenol as target pollutant. Firstly, four experiments were conducted at 25°C in a batch way using the same initial phenol and oxidant concentrations (10 mM and 420 mM, respectively), being the molar ratio activator/PS fixed to 0.005 with nZVI (mass ratio 0.0011 nZVI/PS), to 2 using hydrogen peroxide and to 2 and 4 with NaOH. Phenol and PS conversions and aromatic byproducts profiles during 168 h reaction time were measured and compared, as well as mineralization and ecotoxicity of the samples. It was found that both phenol and aromatic byproducts (catechol and hydroquinone) totally disappeared using PS activated by alkali before 24 h, while a significant amount of aromatic intermediates was obtained with nZVI and H O . Additional runs were carried out using shorter times (0-2 h) to discriminate the oxidation route and the kinetic model of phenol abatement by using PS activated by alkali. Different initial concentrations of phenol (5-15 mM), PS (210 and 420 mM) and molar ratio NaOH/PS (2 and 4) were employed. The kinetic model obtained predicts accurately the evolution of phenol, persulfate, hydroquinone and catechol.
[Mh] Termos MeSH primário: Modelos Químicos
Nanopartículas/química
Fenol/química
Hidróxido de Sódio/química
Sulfatos/química
Poluentes Químicos da Água/química
[Mh] Termos MeSH secundário: Peróxido de Hidrogênio
Ferro
Cinética
Oxirredução
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Sulfates); 0 (Water Pollutants, Chemical); 339NCG44TV (Phenol); 55X04QC32I (Sodium Hydroxide); BBX060AN9V (Hydrogen Peroxide); E1UOL152H7 (Iron)
[Em] Mês de entrada:1803
[Cu] Atualização por classe:180308
[Lr] Data última revisão:
180308
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170311
[St] Status:MEDLINE
[do] DOI:10.1080/09593330.2017.1294203


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[PMID]:28278773
[Au] Autor:Feng Y; Liao C; Li H; Liu C; Shih K
[Ad] Endereço:a Department of Civil Engineering , The University of Hong Kong , Hong Kong.
[Ti] Título:Cu O-promoted degradation of sulfamethoxazole by α-Fe O -catalyzed peroxymonosulfate under circumneutral conditions: synergistic effect, Cu/Fe ratios, and mechanisms.
[So] Source:Environ Technol;39(1):1-11, 2018 Jan.
[Is] ISSN:0959-3330
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:To promote the application of iron oxides in sulfate radical-based advanced oxidation processes, a convenient approach using Cu O as a catalyst additive was proposed. Composite catalysts based on α-Fe O (CTX%Cu O, X = 1, 2.5, 5, and 10) were prepared for peroxymonosulfate (PMS) activation, and sulfamethoxazole was used as a model pollutant to probe the catalytic reactivity. The results show that a synergistic catalytic effect exists between Cu O and α-Fe O , which was explained by the promoted reduction of Fe(III) by Cu(I). Iron K-edge X-ray absorption spectroscopy investigations indicated that the promoted reduction probably occurred with PMS acting as a ligand that bridges the redox centers of Cu(I) and Fe(III). The weight ratio between Cu O and α-Fe O influenced the degradation of sulfamethoxazole, and the optimal ratio depended on the dosage of PMS and catalysts. With 40 mg L PMS and 0.6 g L catalyst, a pseudo-first-order constant of ∼0.019 min was achieved for CT2.5%Cu O, whereas only 0.004 min was realized for α-Fe O . Nearly complete degradation of the sulfamethoxazole was achieved within 180 min under the conditions of 40 mg L PMS, 0.4 g L CT2.5%Cu O, and pH 6.8. In contrast, less than 20% degradation was realized with α-Fe O under similar conditions. The CT2.5%Cu O catalyst had the best stoichiometric efficiency of PMS (0.317), which was 4.5 and 5.8 times higher than those of Cu O (0.070) and α-Fe O (0.054), respectively. On the basis of the products identified, the cleavage of the S-N bond was proposed as a major pathway for the degradation of sulfamethoxazole.
[Mh] Termos MeSH primário: Modelos Químicos
Sulfametoxazol/química
Poluentes Químicos da Água/química
[Mh] Termos MeSH secundário: Cobre/química
Compostos Férricos/química
Ferro/química
Peróxidos/química
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Ferric Compounds); 0 (Peroxides); 0 (Water Pollutants, Chemical); 1K09F3G675 (ferric oxide); 22047-43-4 (peroxymonosulfate); 789U1901C5 (Copper); E1UOL152H7 (Iron); JE42381TNV (Sulfamethoxazole)
[Em] Mês de entrada:1803
[Cu] Atualização por classe:180308
[Lr] Data última revisão:
180308
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170311
[St] Status:MEDLINE
[do] DOI:10.1080/09593330.2017.1293164



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