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[PMID]:28709066
[Au] Autor:Chen C; Liang J; Yoza BA; Li QX; Zhan Y; Wang Q
[Ad] Endereço:State Key Laboratory of Heavy Oil Processing, State Key Laboratory of Petroleum Pollution Control, China University of Petroleum, Beijing 102249, China.
[Ti] Título:Evaluation of an up-flow anaerobic sludge bed (UASB) reactor containing diatomite and maifanite for the improved treatment of petroleum wastewater.
[So] Source:Bioresour Technol;243:620-627, 2017 Nov.
[Is] ISSN:1873-2976
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:Novel diatomite (R1) and maifanite (R2) were utilized as support materials in an up-flow anaerobic sludge bed (UASB) reactor for the treatment of recalcitrant petroleum wastewater. At high organic loadings (11kg-COD/m ·d), these materials were efficient at reducing COD (92.7% and 93.0%) in comparison with controls (R0) (88.4%). Higher percentages of large granular sludge (0.6mm or larger) were observed for R1 (30.3%) and R2 (24.6%) compared with controls (22.6%). The larger portion of granular sludge provided a favorable habitat that resulted in greater microorganism diversity. Increased filamentous bacterial communities are believed to have promoted granular sludge formation promoting a conductive environment for stimulation methanogenic Archaea. These communities had enhanced pH tolerance and produced more methane. This study illustrates a new potential use of diatomite and maifanite as support materials in UASB reactors for increased efficiency when treating refractory wastewaters.
[Mh] Termos MeSH primário: Terra de Diatomáceas
Esgotos
Eliminação de Resíduos Líquidos
[Mh] Termos MeSH secundário: Anaerobiose
Reatores Biológicos
Petróleo
Águas Residuais
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Petroleum); 0 (Sewage); 0 (Waste Water); 61790-53-2 (Diatomaceous Earth); 68855-54-9 (diatomite)
[Em] Mês de entrada:1710
[Cu] Atualização por classe:171023
[Lr] Data última revisão:
171023
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170715
[St] Status:MEDLINE


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[PMID]:28598342
[Au] Autor:Lu P; Amburgey JE; Hill VR; Murphy JL; Schneeberger CL; Arrowood MJ; Yuan T
[Ad] Endereço:Department of Environmental Science and Spatial Informatics, China University of Mining and Technology, Xuzhou 221116, China E-mail: lupingcumt@126.com; Civil and Environmental Engineering, University of North Carolina at Charlotte, Charlotte, NC 28223, USA.
[Ti] Título:Removals of cryptosporidium parvum oocysts and cryptosporidium-sized polystyrene microspheres from swimming pool water by diatomaceous earth filtration and perlite-sand filtration.
[So] Source:J Water Health;15(3):374-384, 2017 Jun.
[Is] ISSN:1477-8920
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:Removal of Cryptosporidium-sized microspheres and Cryptosporidium parvum oocysts from swimming pools was investigated using diatomaceous earth (DE) precoat filtration and perlite-sand filtration. In pilot-scale experiments, microsphere removals of up to 2 log were obtained with 0.7 kg·DE/m at a filtration rate of 5 m/h. A slightly higher microsphere removal (2.3 log) was obtained for these DE-precoated filters when the filtration rate was 3.6 m/h. Additionally, pilot-scale perlite-sand filters achieved greater than 2 log removal when at least 0.37 kg/m of perlite was used compared to 0.1-0.4 log removal without perlite both at a surface loading rate of 37 m/h. Full-scale testing achieved 2.7 log of microspheres and oocysts removal when 0.7 kg·DE/m was used at 3.6 m/h. Removals were significantly decreased by a 15-minute interruption of the flow (without any mechanical agitation) to the DE filter in pilot-scale studies, which was not observed in full-scale filters. Microsphere removals were 2.7 log by perlite-sand filtration in a full-scale swimming pool filter operated at 34 m/h with 0.5 kg/m of perlite. The results demonstrate that either a DE precoat filter or a perlite-sand filter can improve the efficiency of removal of microspheres and oocysts from swimming pools over a standard sand filter under the conditions studied.
[Mh] Termos MeSH primário: Cryptosporidium parvum/isolamento & purificação
Filtração/métodos
Microesferas
Saúde Pública/métodos
Piscinas
Purificação da Água/métodos
[Mh] Termos MeSH secundário: Óxido de Alumínio/química
Cryptosporidium parvum/crescimento & desenvolvimento
Terra de Diatomáceas/química
Oocistos
Poliestirenos/análise
Saúde Pública/instrumentação
Dióxido de Silício/química
Purificação da Água/instrumentação
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Polystyrenes); 0SG101ZGK9 (Perlite); 61790-53-2 (Diatomaceous Earth); 7631-86-9 (Silicon Dioxide); LMI26O6933 (Aluminum Oxide)
[Em] Mês de entrada:1711
[Cu] Atualização por classe:171116
[Lr] Data última revisão:
171116
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170610
[St] Status:MEDLINE
[do] DOI:10.2166/wh.2017.221


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[PMID]:28402304
[Au] Autor:Zhao P; Zhang R; Wang J
[Ad] Endereço:College of Chemical Engineering, Huaqiao University, XiaMen, China.
[Ti] Título:Adsorption of methyl orange from aqueous solution using chitosan/diatomite composite.
[So] Source:Water Sci Technol;75(7-8):1633-1642, 2017 Apr.
[Is] ISSN:0273-1223
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:A novel chitosan/diatomite composite was prepared by a simple mixture in the mass ratio to remove methyl orange (MO) from aqueous media in this study. The composite adsorbent was characterized by Fourier transform infrared spectroscopy and scanning electron microscopy analysis. The parameters to influence the adsorption of MO were studied under such conditions as kinetics, adsorption isotherm, pH effect, and thermodynamics. The results revealed that adsorption of MO was initially rapid and the equilibrium time was reached after 40 min. The optimal value of the pH was 5.0 for better adsorption. The equilibrium data were well fitted to the Langmuir isotherm compared to the Freundlich isotherm, and exhibited the highest capacity and a removal rate of 88.37% under an initial dye concentration of 50 mg/L. The kinetic data were well described by the pseudo-second order model. The thermodynamic calculations revealed that the sorption was viable, spontaneous, and exothermic under the conditions studied. In addition, the chitosan/diatomite composite had good adsorption and desorption performance with respect to reusability after six cycles. These results showed that the chitosan/diatomite could be considered as a potential adsorbent for the removal of MO in aqueous solution.
[Mh] Termos MeSH primário: Compostos Azo/química
Quitosana/química
Terra de Diatomáceas/química
Poluentes Químicos da Água/química
[Mh] Termos MeSH secundário: Adsorção
Concentração de Íons de Hidrogênio
Cinética
Microscopia Eletrônica de Varredura
Espectroscopia de Infravermelho com Transformada de Fourier
Termodinâmica
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Azo Compounds); 0 (Water Pollutants, Chemical); 61790-53-2 (Diatomaceous Earth); 68855-54-9 (diatomite); 6B4TC34456 (methyl orange); 9012-76-4 (Chitosan)
[Em] Mês de entrada:1709
[Cu] Atualização por classe:170919
[Lr] Data última revisão:
170919
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170413
[St] Status:MEDLINE
[do] DOI:10.2166/wst.2017.034


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[PMID]:28108578
[Au] Autor:De Vries AJ; Lansink-Hartgring AO; Fernhout FJ; Huet RCG; van den Heuvel ER
[Ad] Endereço:Department of Anesthesiology, University Medical Center Groningen, University of Groningen, Groningen, Netherlands.
[Ti] Título:The activated clotting time in cardiac surgery: should Celite or kaolin be used?
[So] Source:Interact Cardiovasc Thorac Surg;24(4):549-554, 2017 04 01.
[Is] ISSN:1569-9285
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:Objectives: Both kaolin- and Celite-activated clotting times (ACT) are used to guide anticoagulation during cardiopulmonary bypass. It is unknown whether these methods lead to similar management procedures for anticoagulation in patients and are thus interchangeable in terms of bias, precision and variability. Methods: We randomized 97 patients undergoing coronary artery bypass grafting or aortic valve replacement to either kaolin- or Celite-guided anticoagulation. The ACT was measured simultaneously with the other method. We administered 300 IU/kg heparin to obtain initial ACT values greater than 400 s and additional heparin in each group using the minimum value of duplicate measurements according to a predefined protocol. The primary end point was the total heparin dose and the number of heparin supplements. Results: The total heparin dose per patient in the 48 Celite-guided patients was 35 271 ± 12 406 IU with 51 supplements and in the 49 kaolin-guided patients, 35 997 ± 11 540 IU ( P = 0.77) with 56 supplements ( P = 0.53). Postoperative thrombin generation time, fibrinolytic response time, chest tube loss and transfusion requirements were not different between the two groups. However, the methods differed in individual patients with regard to supplemental heparin ( P = 0.002). Bias between methods at baseline was +10.3%, Celite being higher, and changed to a value of -12.9% at 2 h bypass. The coefficient of variation at baseline for individual patients was 2.6 times larger with kaolin than with Celite ( P < 0.001). Correlation between ACT values at baseline was only 45%. Conclusions: Kaolin- and Celite-guided management of anticoagulation is clinically not different, but the methods are not interchangeable. Clinical registration number: www.trialregister.nl identifier 1738.
[Mh] Termos MeSH primário: Anticoagulantes/uso terapêutico
Ponte Cardiopulmonar
Ponte de Artéria Coronária
Terra de Diatomáceas/uso terapêutico
Implante de Prótese de Valva Cardíaca
Caulim/uso terapêutico
[Mh] Termos MeSH secundário: Idoso
Transfusão de Sangue
Feminino
Heparina/uso terapêutico
Seres Humanos
Masculino
Meia-Idade
Estudos Prospectivos
Tempo de Coagulação do Sangue Total
[Pt] Tipo de publicação:JOURNAL ARTICLE; RANDOMIZED CONTROLLED TRIAL
[Nm] Nome de substância:
0 (Anticoagulants); 24H4NWX5CO (Kaolin); 61790-53-2 (Diatomaceous Earth); 9005-49-6 (Heparin)
[Em] Mês de entrada:1708
[Cu] Atualização por classe:170802
[Lr] Data última revisão:
170802
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170122
[St] Status:MEDLINE
[do] DOI:10.1093/icvts/ivw435


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[PMID]:27737795
[Au] Autor:Park SH; Kim J; Kim D; Moon Y
[Ad] Endereço:Laboratory of Mucosal Exposome and Biomodulation, Department of Biomedical Sciences, Pusan National University School of Medicine, Yangsan, South Korea; Research Institute for Basic Sciences and Medical Research Institute, Pusan National University, Busan, South Korea; Immunoregulatory Therapeutics
[Ti] Título:Mycotoxin detoxifiers attenuate deoxynivalenol-induced pro-inflammatory barrier insult in porcine enterocytes as an in vitro evaluation model of feed mycotoxin reduction.
[So] Source:Toxicol In Vitro;38:108-116, 2017 Feb.
[Is] ISSN:1879-3177
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:Deoxynivalenol (DON), the most prevalent mycotoxin worldwide, leads to economic losses for animal food production. Swine is a most sensitive domestic animal to DON due to rapid absorption and low detoxification by gut microbiota. Specifically, DON can severely damage pig intestinal tissue by disrupting the intestinal barrier and inducing inflammatory responses. We evaluated the effects of several mycotoxin detoxifiers including bentonites, yeast cell wall components, and mixture-typed detoxifier composed of mineral, microorganisms, and phytogenic substances on DON-insulted intestinal barrier and pro-inflammatory responses using in vitro porcine enterocyte culture model. DON-induced disruption of the in vitro gut barrier was attenuated by all three mycotoxin detoxifiers in dose-dependent manners. These mycotoxin detoxifiers also suppressed DON-induced pro-inflammatory chemokine expression to different degrees, which was mediated by downregulation of mitogen-activated kinases and early growth response-1. Of note, the mixture-typed detoxifier was the most prominent mitigating agent at the cellular levels whereas the high dose of bentonite clay also had suppressive action against DON-induced pro-inflammatory insult. The in vitro porcine enterocyte-based assessment of intestinal barrier integrity and inflammatory signals provides sensitive and simplified alternative bioassay of feed additives such as detoxifiers against enteropathogenic mycotoxins with comprehensive mechanistic confirmation.
[Mh] Termos MeSH primário: Ração Animal
Enterócitos/efeitos dos fármacos
Contaminação de Alimentos/prevenção & controle
Tricotecenos/toxicidade
[Mh] Termos MeSH secundário: Animais
Bentonita/farmacologia
Linhagem Celular
Parede Celular
Quimiocina CCL2/metabolismo
Terra de Diatomáceas/farmacologia
Enterócitos/metabolismo
Interleucina-8/metabolismo
Suínos
Leveduras
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Chemokine CCL2); 0 (Interleukin-8); 0 (Trichothecenes); 1302-78-9 (Bentonite); 61790-53-2 (Diatomaceous Earth); JT37HYP23V (deoxynivalenol)
[Em] Mês de entrada:1703
[Cu] Atualização por classe:170330
[Lr] Data última revisão:
170330
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:161015
[St] Status:MEDLINE


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[PMID]:27616063
[Au] Autor:Sramska P; Maciejka A; Topolewska A; Stepnowski P; Halinski LP
[Ad] Endereço:Department of Environmental Analysis, Faculty of Chemistry, University of Gdansk, Wita Stwosza 63, 80-308 Gdansk, Poland.
[Ti] Título:Isolation of atropine and scopolamine from plant material using liquid-liquid extraction and EXtrelut columns.
[So] Source:J Chromatogr B Analyt Technol Biomed Life Sci;1043:202-208, 2017 Feb 01.
[Is] ISSN:1873-376X
[Cp] País de publicação:Netherlands
[La] Idioma:eng
[Ab] Resumo:Tropane alkaloids are toxic secondary metabolites produced by Solanaceae plants. Among them, plants from Datura genus produce significant amounts of scopolamine and hyoscyamine; the latter undergoes racemization to atropine during isolation. Because of their biological importance, toxic properties and commonly reported food and animal feed contamination by different Datura sp. organs, there is a constant need for reliable methods for the analysis of tropane alkaloids in many matrices. In the current study, three extraction and sample-clean up procedures for the determination of scopolamine and atropine in plant material were compared in terms of their effectiveness and repeatability. Standard liquid-liquid extraction (LLE) and EXtrelut NT 3 columns were used for the sample clean-up. Combined ultrasound-assisted extraction and 24h static extraction using ethyl acetate, followed by multiple LLE steps was found the most effective separation method among tested. However, absolute extraction recovery was relatively low and reached 45-67% for atropine and 52-73% for scopolamine, depending on the compound concentration. The same method was also the most effective one for the isolation of target compounds from Datura stramonium leaves. EXtrelut columns, on the other hand, displayed relatively low effectiveness in isolating atropine and scopolamine from such a complex matrix and hence could not be recommended. The most effective method was also applied to the extraction of alkaloids from roots and stems of D. stramonium. Quantitative analyses were performed using validated method based on gas chromatography with flame ionization detector (GC-FID). Based on the results, the importance of the proper selection of internal standards in the analysis of tropane alkaloids was stressed out.
[Mh] Termos MeSH primário: Atropina/isolamento & purificação
Terra de Diatomáceas/química
Extração Líquido-Líquido/métodos
Hidrobrometo de Escopolamina/isolamento & purificação
[Mh] Termos MeSH secundário: Atropina/análise
Atropina/química
Cromatografia Gasosa
Datura/química
Limite de Detecção
Modelos Lineares
Extração Líquido-Líquido/instrumentação
Extratos Vegetais/química
Reprodutibilidade dos Testes
Hidrobrometo de Escopolamina/análise
Hidrobrometo de Escopolamina/química
Sonicação
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Plant Extracts); 451IFR0GXB (Scopolamine Hydrobromide); 61790-53-2 (Diatomaceous Earth); 68445-07-8 (Extrelut); 7C0697DR9I (Atropine)
[Em] Mês de entrada:1703
[Cu] Atualização por classe:170308
[Lr] Data última revisão:
170308
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:160913
[St] Status:MEDLINE


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[PMID]:27433013
[Au] Autor:Nazmi A; Hauck R; Davis A; Hildebrand M; Corbeil LB; Gallardo RA
[Ad] Endereço:Department of Population Health and Reproduction, School of Veterinary Medicine, University of California, Davis, 1089 Veterinary Medicine Dr. VM3B, Davis, CA 95616.
[Ti] Título:Diatoms and diatomaceous earth as novel poultry vaccine adjuvants.
[So] Source:Poult Sci;96(2):288-294, 2017 Feb 01.
[Is] ISSN:1525-3171
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:Diatoms are single cell eukaryotic microalgae; their surface possesses a porous nanostructured silica cell wall or frustule. Diatomaceous earth (DE) or diatomite is a natural siliceous sediment of diatoms. Since silica has been proved to have adjuvant capabilities, we propose that diatoms and DE may provide an inexpensive and abundant source of adjuvant readily available to use in livestock vaccines.In a first experiment, the safety of diatoms used as an adjuvant for in-ovo vaccination was investigated. In a second experiment, we assessed the humoral immune response after one in-ovo vaccination with inactivated Newcastle Disease Virus (NDV) and DE as adjuvant followed by 2 subcutaneous boosters on d 21 and 29 of age. In both experiments, results were compared to Freund's incomplete adjuvant and aluminum hydroxide.No detrimental effects on hatchability and chick quality were detected after in-ovo inoculation of diatoms and DE in experiments 1 and 2 respectively. In experiment 2 no humoral responses were detected after the in-ovo vaccination until 29 d of age. Seven d after the second subcutaneous booster an antibody response against NDV was detected in chickens that had received vaccines adjuvanted with Freund's incomplete adjuvant, aluminum hydroxide, and DE. These responses became significantly higher 10 d after the second booster. Finally, 15 d after the second booster, the humoral responses induced by the vaccine with Freund's incomplete adjuvant were statistically higher, followed by comparable responses induced by vaccines containing DE or aluminum hydroxide that were significantly higher than DE+PBS, PBS+INDV and PBS alone. From an applied perspective, we can propose that DE can serve as a potential adjuvant for vaccines against poultry diseases.
[Mh] Termos MeSH primário: Galinhas
Terra de Diatomáceas/farmacologia
Diatomáceas/química
Doença de Newcastle/imunologia
Vírus da Doença de Newcastle/imunologia
Doenças das Aves Domésticas/imunologia
Vacinas Virais/imunologia
[Mh] Termos MeSH secundário: Adjuvantes Imunológicos/farmacologia
Animais
Embrião de Galinha/efeitos dos fármacos
Imunidade Humoral/efeitos dos fármacos
Imunização Secundária/veterinária
Injeções Subcutâneas
Vacinas de Produtos Inativados/imunologia
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Adjuvants, Immunologic); 0 (Vaccines, Inactivated); 0 (Viral Vaccines); 61790-53-2 (Diatomaceous Earth)
[Em] Mês de entrada:1705
[Cu] Atualização por classe:170524
[Lr] Data última revisão:
170524
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:160720
[St] Status:MEDLINE
[do] DOI:10.3382/ps/pew250


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[PMID]:27279365
[Au] Autor:Wang B; Shui Y; Ren H; He M
[Ad] Endereço:a Department of Chemistry and Chemical Engineering , Southwest Petroleum University , Chengdu Sichuan , People's Republic of China.
[Ti] Título:Research of combined adsorption-coagulation process in treating petroleum refinery effluent.
[So] Source:Environ Technol;38(4):456-466, 2017 Feb.
[Is] ISSN:0959-3330
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:The petroleum refinery industry generates a significant amount of wastewater that contains a high level of organic matter, which calls for effective and costly treatments. In this research, the effectiveness of the petroleum refinery effluent (PRE) treatment with physicochemical process of combined adsorption and coagulation was evaluated. The effects of initial pH, hydraulic condition , and combined sequence of treatment process, different treating reagent types and dosages on the chemical oxygen demand (COD) removal were investigated. Additionally, the elimination efficiency of pollutant wastewater was monitored by gas chromatography-mass spectrometry (GC-MS), and Fourier transformed infrared (FT-IR) spectrophotometer was adopted to describe the structure of the wastewater. Wooden activated carbon was chosen as adsorbent at the dosage of 10 g/L as a primary treatment, and 1500 mg/L polymeric magnesium ferric sulfate was used in coagulation. Results showed that adsorption and subsequent coagulation displayed the best performance when initial pH was 9 at shear rates (G) of G1 = 65 s and G2 = 20 s , which reached maximal removal rate of COD and total organic carbon GC-MS testing result revealed that adsorption was effective in phenols and iso-alkanes removal, whereas coagulation was good at removing esters and n-alkanes.
[Mh] Termos MeSH primário: Indústrias Extrativas e de Processamento
Resíduos Industriais
Petróleo
Eliminação de Resíduos Líquidos/métodos
[Mh] Termos MeSH secundário: Adsorção
Hidróxido de Alumínio/química
Bentonita/química
Análise da Demanda Biológica de Oxigênio
Carbono/análise
Carbono/química
Terra de Diatomáceas/química
Compostos Férricos/química
Floculação
Concentração de Íons de Hidrogênio
Polímeros/química
Águas Residuais/análise
Águas Residuais/química
Poluentes da Água/análise
Poluentes da Água/química
Zeolitas/química
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Ferric Compounds); 0 (Industrial Waste); 0 (Petroleum); 0 (Polymers); 0 (Waste Water); 0 (Water Pollutants); 0 (polyferric aluminum chloride); 1302-78-9 (Bentonite); 1318-02-1 (Zeolites); 1327-41-9 (aluminum oxychloride); 3HWS7HF5XD (ferric sulfate); 5QB0T2IUN0 (Aluminum Hydroxide); 61790-53-2 (Diatomaceous Earth); 68855-54-9 (diatomite); 7440-44-0 (Carbon)
[Em] Mês de entrada:1702
[Cu] Atualização por classe:170213
[Lr] Data última revisão:
170213
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:160610
[St] Status:MEDLINE
[do] DOI:10.1080/09593330.2016.1197319


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[PMID]:27363165
[Au] Autor:Zhu J; Wang P; Lin Y; Lei MJ; Chen Y
[Ti] Título:[Differential Effect and Mechanism of in situ Immobilization of Cadmium Contamination in Soil Using Diatomite Produced from Different Areas].
[So] Source:Huan Jing Ke Xue;37(2):717-25, 2016 Feb 15.
[Is] ISSN:0250-3301
[Cp] País de publicação:China
[La] Idioma:chi
[Ab] Resumo:In order to understand the difference of in situ immobilization effect and mechanism of Cd contamination in soil using diatomite produced from different areas, the test was conducted using diatomite produced from Yunnan Tengchong, Jilin Linjiang, Zhejiang Shengzhou and Henan Xinyang of China as modifiers to immobilize cadmium contamination in simulated soil. The results indicated that the diatomite from all the four producing areas could effectively immobilize available Cd in soil, decreasing the available Cd content in soil by 27.7%, 28.5%, 30.1% and 57.2%, respectively when the adding concentration was 30 g x kg(-1). Their ability for immobilizing available Cd in soil followed the sequence of Henan Xinyang > Zhejiang Shengzhou > Jilin Linjiang > Yunnan Tengchong. It was also found that the physical and chemical properties of diatomite played a main role in soil cadmium immobilization, lower bulk density, larger specific surface area, more micro pores and wider distribution range of aperture were more favorable for available Cd immobilization. The results also showed that, the diatomite could control Cd contamination by changing soil physical and chemical properties, among these properties, pH and organic matter content were the key factors, increasing soil pH value and organic matter content was favorable for available cadmium immobilization, while the soil water content had little effect on available cadmium immobilization. The control of soil cadmium contamination by using diatomite to change cation exchange capacity was limited by time in some degree. The diatomite produced from Henan Xinyang, Zhejiang Shengzhou and Yunnan Tengchong increased the soil pH value and organic matter content, and was favorable for available Cd immobilization, while the diatomite from Jilin Linjiang showed converse effect.
[Mh] Termos MeSH primário: Cádmio/química
Terra de Diatomáceas/química
Poluentes do Solo/química
Solo/química
[Mh] Termos MeSH secundário: China
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Soil); 0 (Soil Pollutants); 00BH33GNGH (Cadmium); 61790-53-2 (Diatomaceous Earth); 68855-54-9 (diatomite)
[Em] Mês de entrada:1607
[Cu] Atualização por classe:171116
[Lr] Data última revisão:
171116
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:160702
[St] Status:MEDLINE


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[PMID]:27232419
[Au] Autor:Zha Y; Zhou Z; He H; Wang T; Luo L
[Ad] Endereço:Department of Chemistry, Shanghai University, Shanghai 200444, China E-mail: luck@shu.edu.cn.
[Ti] Título:Nanoscale zero-valent iron incorporated with nanomagnetic diatomite for catalytic degradation of methylene blue in heterogeneous Fenton system.
[So] Source:Water Sci Technol;73(11):2815-23, 2016.
[Is] ISSN:0273-1223
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:Nanoscale zero-valent iron (nZVI) incorporated with nanomagnetic diatomite (DE) composite material was prepared for catalytic degradation of methylene blue (MB) in heterogeneous Fenton system. The material was constructed by two facile steps: Fe3O4 magnetic nanoparticles were supported on DE by chemical co-precipitation method, after which nZVI was incorporated into magnetic DE by liquid-phase chemical reduction strategy. The as-prepared catalyst was characterized by scanning electron microscopy, Fourier-transform infrared spectroscopy, X-ray diffraction, magnetic properties measurement and nitrogen adsorption-desorption isotherm measurement. The novel nZVI@Fe3O4-diatomite nanocomposites showed a distinct catalytic activity and a desirable effect for degradation of MB. MB could be completely decolorized within 8 min and the removal efficiency of total organic carbon could reach to 90% after reaction for 1 h.
[Mh] Termos MeSH primário: Terra de Diatomáceas/química
Ferro/química
Nanopartículas de Magnetita/química
Azul de Metileno/química
Poluentes Químicos da Água/química
[Mh] Termos MeSH secundário: Adsorção
Catálise
Precipitação Química
Peróxido de Hidrogênio
Magnetismo
Microscopia Eletrônica de Varredura
Nanocompostos
Difração de Raios X
[Pt] Tipo de publicação:EVALUATION STUDIES; JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Nm] Nome de substância:
0 (Fenton's reagent); 0 (Magnetite Nanoparticles); 0 (Water Pollutants, Chemical); 61790-53-2 (Diatomaceous Earth); 68855-54-9 (diatomite); BBX060AN9V (Hydrogen Peroxide); E1UOL152H7 (Iron); T42P99266K (Methylene Blue)
[Em] Mês de entrada:1609
[Cu] Atualização por classe:160528
[Lr] Data última revisão:
160528
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:160528
[St] Status:MEDLINE
[do] DOI:10.2166/wst.2016.134



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