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Alireza Khataee, Peyman Gholami, Dimitrios Kalderis, Eleni Pachatouridou, Michalis Konsolakis
The sonocatalytic performance of CeO2 nanoparticles synthesized by a hydrothermal method (CeO2-H) and CeO2@biochar (CeO2-H@BC) nanocomposite, were evaluated for the degradation of Reactive Red 84 (RR84) under ultrasonic irradiation. For comparison purposes the corresponding performance of bare biochar (BC) and commercial CeO2 (CeO2-C) samples were also assessed. A complementary characterization study, involving scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDX), Transmission electron microscopy (TEM), dynamic light scattering (DLS), X-ray diffraction (XRD), N2 adsorption at -196°C (Brunauer-Emmett-Teller (BET) method) and Fourier transform infrared spectroscopy (FT-IR) was undertaken to gain insight into the structure-performance relationships...
March 2018: Ultrasonics Sonochemistry
Huanhuan Yu, Siyuan Zhong, Baolin Zhu, Weiping Huang, Shoumin Zhang
One-dimensional (1D) Ce-La nanorods with different La contents (Ce and La in the molar ratio of 1:0, 3:1, 1:1, 1:3, and 0:1) were synthesized by hydrothermal process. Au/Ce-La nanorod catalysts were obtained by a modified deposition-precipitation method. The samples were characterized by N2 adsorption-desorption (BET), ICP, X-ray diffraction (XRD), SEM, TEM, EDX, X-ray photoelectron spectroscopy (XPS), UV-vis diffuse reflectance spectroscopy (UV-vis DRS), and temperature-programmed reduction (H2-TPR). It revealed that La existed as LaO x in the 1D nanorods...
November 2, 2017: Nanoscale Research Letters
Andrew C Kline
A short cut review was carried out to establish whether strict physical rest following sports related concussion in children is better than normal activity in reducing post-concussional symptoms. two recent systematic reviews presented the best evidence to answer the clinical question. The author, date and country of publication, patient group studied, study type, relevant outcomes, results and study weaknesses of these papers are tabulated. It is concluded that children who present with a sport-related concussion should have a brief period of cognitive and physical rest followed by a gradual increase in activity...
November 2017: Emergency Medicine Journal: EMJ
Emmy De Buck
A short cut review was carried out to establish whether routine use of emollients on the face reduced the incidence of frostbite in cold environments. 126 papers were found using the reported searches, of which three presented the best evidence to answer the clinical question. The author, date and country of publication, patient group studied, study type, relevant outcomes, results and study weaknesses of these papers are tabulated. It is concluded that the use of emollients on the face is not a good protection against frostbite and may even result in a higher risk...
November 2017: Emergency Medicine Journal: EMJ
Misbah Sultan, Asma Javeed, Maliha Uroos, Muhammad Imran, Farhat Jubeen, Shazia Nouren, Nazish Saleem, Ismat Bibi, Rashid Masood, Waqas Ahmed
The large amount of synthetic dyes in effluents is a serious concern to be addressed. The chemical reduction is one of the potential way to resolve this problem. In this study, linear and crosslinked polyurethanes i.e. LPUR & CLPUR were synthesized from toluene diisocyanate (TDI), polyethylene glycol (PEG;1000g/mole) and tetraethylenepentamine (TEPA). The structure and morphology of synthesized materials were examined by FTIR, SEM and BET. The CLPUR was found stable in aqueous system with 0.80g/cm(3) density and 16...
October 10, 2017: Journal of Hazardous Materials
Mona Mohseni Kafshgari, Hasan Tahermansouri
The functionalization of graphene oxide (GO) with chitosan (Chi) has been investigated to prepare a nanocomposite material (GO-Chi) for the removal of picric acid from aqueous solutions. Materials were characterized by FT-IR, TGA, DTG, FESEM, EDX, XRD and BET. Batch experiments such as solution pH, amount of adsorbents, contact time, concentration of the picric acid and temperature were achieved to study sorption process. Kinetic studies were well described by pseudo-second-order kinetic model for both adsorbents...
October 7, 2017: Colloids and Surfaces. B, Biointerfaces
Xiaoxia Li, Kyung Ho Row
A series of ecofriendly ternary deep eutectic solvents (DESs) with different molar ratios were prepared as candidate functional monomers. Three of the optimal ternary DESs as functional monomers were applied to the preparation of molecularly imprinted polymers (MIPs). After synthesis, the proposed polymers were characterized by elemental analysis (EA), scanning electron microscopy (SEM), thermogravimetric analysis (TGA), Brunauer-Emmett-Teller surface area measurements (BET) and Fourier transform infrared spectroscopy (FT-IR)...
October 7, 2017: Journal of Chromatography. B, Analytical Technologies in the Biomedical and Life Sciences
Thabo J Brooms, Benton Otieno, Maurice S Onyango, Aoyi Ochieng
This study evaluated the photocatalytic activity of polyaniline (PANI)-capped titanium dioxide and zinc oxide (TiO2/ZnO) hybrid, for the degradation of P-Cresol. The hybrid was synthesized by precipitating ZnO on the surface of commercial TiO2. An "in situ" chemical oxidative polymerization method was used to prepare the PANI capped hybrid (TiO2/ZnO/PANI). The photocatalysts were characterized by powder X-ray diffraction (XRD), a Brunauer Emmett Teller (BET) analyzer, Fourier-transform infrared (FTIR) and photoluminescence spectroscopies, high resolution-transmission electron microscopy (HR-TEM) and thermogravimetric analysis (TGA)...
October 13, 2017: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
Buscotin Horax Beakou, Kaoutar El Hassani, Mohammed Amine Houssaini, Mounir Belbahloul, Elhassan Oukani, Abdellah Anouar
The adsorptive removal of Malachite Green (MG) by a novel biochar namely Cassava Rind Carbon (CRC) was studied in a batch system. Moreover, Box-Behnken Response Surface Methodology was used to optimize operating conditions of the adsorption process. Characterization was done by Thermo Gravimetric Analysis (TGA), Attenuated Total Reflectance Fourier Transform Infra-Red Spectroscopy (ATR/FTIR), Brunauer-Emmett-Teller (BET) surface area, Scanning Electron Microscopy (SEM), X-Ray Diffraction (XRD) and pH zero charge point (pHZCP)...
September 2017: Water Science and Technology: a Journal of the International Association on Water Pollution Research
Rohini Ambati, Parag R Gogate
The present work deals with synthesis of Fe (III) doped TiO2 catalyst using the ultrasound assisted approach and conventional sol-gel approach with an objective of establishing the process intensification benefits. Effect of operating parameters such as Fe doping, type of solvent, solvent to precursor ratio and initial temperature has been investigated to get the best catalyst with minimum particle size. Comparison of the catalysts obtained using the conventional and ultrasound assisted approach under the optimized conditions has been performed using the characterization techniques like DLS, XRD, BET, SEM, EDS, TEM, FTIR and UV-Vis band gap analysis...
January 2018: Ultrasonics Sonochemistry
Payam Margan, Mohammad Haghighi
In this research, CdO-ZnO nano-photocatalysts were synthesized in various compositions by ultrasound assisted co-precipitation method. The samples were investigated via analyses of XRD, FESEM, BET, DRS, FTIR and EDX dot mapping to determine the physical, chemical and optical properties of the nanocomposites. Successful synthesis of CdO-ZnO photocatalyst in crystalline form was confirmed by XRD analysis resulting lower crystallite sizes for ZnO compared to CdO in the composites. The FESEM analysis demonstrated a nanostructured catalyst with a distinct decrease in particle size by addition of CdO to ZnO photocatalyst...
January 2018: Ultrasonics Sonochemistry
Atousa Bahiraei, Abbas Afkhami, Tayyebeh Madrakian, Rasoul Gheitaran
Maghemite nanoparticles, as an adsorbent, was used for the removal of sulfur species including sulfide, sulfite and thiosulfate from waste water samples by ultrasonic-assisted adsorption method. The characterization of the prepared nanoparticles was carried out by Fourier transform infrared spectroscopy, scanning electron microscopy, X-ray diffraction and BET technique. The nanoparticles well dispersed in the water. The adsorbent was easily separated magnetically from the solution after loading with adsorbate...
January 2018: Ultrasonics Sonochemistry
Xiaojuan Li, Zhongmin Wang, Haijun Liang, Jingliang Ning, Guiyin Li, Zhide Zhou
Lead (Pb) pollution has triggered a great threat to ecological system as well as public health due to its highly toxic and mutagenic properties. In this study, chitosan surface modified persimmon tannin (PT-CS) biomass composite as an environmental friendly bioadsorbent for highly efficient removal of Pb(II) from aqueous solutions was investigated. FT-IR, XRD, SEM, BET, XPS and Zeta potential were used to elucidate the adsorption mechanism. Combining of oxidation reaction, electrostatic interaction and chelation reaction, PT-CS exhibited fine adsorption performance to Pb(II)...
September 15, 2017: Environmental Technology
Harkirat Kaur, Amit Bansiwal, Girivyankatesh Hippargi, Girish R Pophali
Adsorption of three pharmaceuticals and personal care products (PPCPs), namely caffeine, ibuprofen and triclosan on commercial powdered activated carbon was examined in aqueous medium. The contaminants were chosen based on their diverse log Kow (octanol-water partition coefficient) viz. - 0.07 for caffeine, 3.97 for ibuprofen and 4.76 for triclosan to examine the role of hydrophobicity on adsorption process. The adsorbent characterisation was achieved using BET surface area, SEM, pore size distribution studies and FTIR...
September 11, 2017: Environmental Science and Pollution Research International
Vicky Dhongde, Kailas L Wasewar, Biswajit S De
The objective of present study is advancement of an efficient nanomaterial which was investigated to substantiate its efficiency, using kinetic studies to ensnare fluoride in order to make water potable. A new crystalline ZrAlCa nanohybrid adsorbent for fluoride removal was successfully synthesized by a co-precipitation method in this study. The prepared adsorbents were characterized by XRD, FT-IR, TGA, BET and FESEM and EDX. The adsorption properties of the developed adsorbent were studied using batch adsorption method which shown the noticeable fluoride removal efficiency up to 99% at near neutral pH as well as in acidic pH range...
September 4, 2017: Chemosphere
Kyriakos Kaderides, Athanasia M Goula
The replacement of maltodextrins as carriers for the spray drying of sticky and sugar based bioactives is an important development for the food industry. In this work, orange juice industry by-product was used to obtain a high dietary fiber powder to be used as carrier material. This powder was characterized with respect to its physical and chemical properties related to the process of encapsulation by spray drying. Adsorption isotherms of orange waste powder were determined at 30, 45, and 60°C. The data were fitted to several models including two-parameter (BET, Halsey, Smith, and Oswin), three-parameter (GAB), and four-parameter (Peleg) relationships...
October 2017: Food Research International
James R Schmidt
One powerfully robust method for the study of human contingency learning is the colour-word contingency learning paradigm. In this task, participants respond to the print colour of neutral words, each of which is presented most often in one colour. The contingencies between words and colours are learned, as indicated by faster and more accurate responses when words are presented in their expected colour relative to an unexpected colour. In a recent report, Forrin and MacLeod (2017b, Memory & Cognition) asked to what extent this performance (i...
September 1, 2017: Memory & Cognition
Kamya Parashar, Niladri Ballav, Sushanta Debnath, Kriveshini Pillay, Arjun Maity
A new hybrid material comprising hydrous zirconium oxide (HZrO2) supported onto polyaniline (PANI) nanofibres (HZrO2@PANI NFs) was prepared via the precipitation of HZrO2 onto as-synthesized PANI NFs and tested for its defluoridation capabilities. The developed adsorbent (HZrO2@PANI NFs) was fully characterized by FTIR, BET, XRD, SEM-EDX, TEM-(S)TEM, XPS, and zeta potential measurements. HZrO2@PANI NFs achieved 2-fold BET surface area ∼86.64 m(2)/gas compared to PANI NFs ∼44.72 m(2)/g, implying that the incorporation of HZrO2 onto the PANI nanofibres enhanced the available surface area for effective fluoride adsorption...
August 16, 2017: Journal of Colloid and Interface Science
Karla K Beltrame, André L Cazetta, Patrícia S C de Souza, Lucas Spessato, Taís L Silva, Vitor C Almeida
The present work reports the preparation of activated carbon fibers (ACFs) from pineapple plant leaves, and its application on caffeine (CFN) removal from aqueous solution. The preparation procedure was carried out using the H3PO4 as activating agent and slow pyrolysis under N2 atmosphere. The characterization of materials was performed from the N2 adsorption and desorption isotherms, scanning electron microscopy (SEM), thermogravimetric analysis (TGA), Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), Raman spectroscopy, Boehm titration and pHpzc method...
January 2018: Ecotoxicology and Environmental Safety
Joel Wilson, Jerry Baskerville, Sahar Zarabi
A shortcut review was carried out to establish whether serum procalcitonin levels can be used to identify serious bacterial infection in ED patients with undifferentiated SIRS. 14 papers presented the best evidence to answer the clinical question. The review concludes that raised procalcitonin levels are associated with bacteraemia; however, there are no clinical management studies addressing this question in ED patients with SIRS.
September 2017: Emergency Medicine Journal: EMJ
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