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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...
August 21, 2017: 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
Kerstin de Wit
No abstract text is available yet for this article.
September 2017: Emergency Medicine Journal: EMJ
Joel Wilson, Sahar Zarabi
A shortcut review was carried out to establish whether the presence of systemic inflammatory response criteria in emergency department patients with pancreatitis is predictive of the risk of death. Eight papers presented the best evidence to answer the clinical question. The review concludes that the presence of SIRS in emergency department patients with pancreatitis is associated with a higher risk of mortality.
September 2017: Emergency Medicine Journal: EMJ
Bitao Liu, Xuelian Yan, Hengqing Yan, Yucen Yao, Yanhua Cai, Jumeng Wei, Shanyong Chen, Xuhui Xu, Lu Li
Molybdenum (Mo) doped BiVO₄ was fabricated via a simple electrospun method. Morphology, structure, chemical states and optical properties of the obtained catalysts were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), UV-vis diffuse reflectance spectroscopy (DRS), N₂ adsorption-desorption isotherms (BET) and photoluminescence spectrum (PL), respectively. The photocatalytic properties indicate that doping Mo into BiVO₄ can enhance the photocatalytic activity and dark adsorption ability...
August 21, 2017: Materials
Wycliffe Wanzala
Antitick plants and related ethnoknowledge/ethnopractices with potential for integrated tick control and management strategies to improve livestock production are reviewed. About 231 plants reviewed showed a variety of bioactive properties, namely, being toxic, repellent, antifeedant, and antiovipositant and ability to immobilize target tick species. These ethnobotanical substances are potentially useful in developing sustainable, efficient, and effective antitick agents suitable for rural livestock farmers...
2017: Evidence-based Complementary and Alternative Medicine: ECAM
Anindita Chakraborty, Subhajit Laha, Kesavan Kamali, Chandrabhas Narayana, Muthusamy Eswaramoorthy, Tapas Kumar Maji
Self-assembly of metal-organic framework (MOF) nanoparticles (NPs) with a functional material can result in MOF nanocomposites having new and advanced properties along with the fabrication of new nanoscopic structures. However, such assembly of MOFs has not been realized to date. Here we report self-assembled nanocomposites of the zeolitic imidazolate framework (ZIF-8) and layered aminoclay (AC) for the first time, and the ZIF-8@AC composites exhibit significantly enhanced adsorption properties in comparison to those of pristine ZIF-8 nanoparticles...
August 9, 2017: Inorganic Chemistry
Zuo Xi Li, Man-Li Yue, Yi-Fan Jiang, Lin Zhang, Cheng-Yan Yu, Kang-Yu Zou
In this work, Cd-MOFs 1-5 have been synthesized from solvothermal reactions of Cd(NO3)2 with ipa and bib under different solvent systems. 1 shows a 3D diamondoid framework with 1D rhombic and hexagonal channels, and the porosity is 12.9%. 2 exhibits a 2D (4,4) layer with a 1D parallelogram channel and porosity of 23.6%. 3 reveals an 8-connected dense network with the Schäfli symbol of [424.64] based on the Cd6 cluster. 4-5 are isomorphous, and display an absolutely double-bridging 2D (4,4) layer with 1D tetragonal channels and porosity of 29...
August 7, 2017: Chemistry: a European Journal
Pengyu Dong, Xinguo Xi, Xinjiang Zhang, Guihua Hou, Rongfeng Guan
Monoclinic BiVO₄ photocatalysts with porous structures were synthesized by a two-step approach without assistance of any templates. The as-prepared samples were characterized by X-ray diffraction pattern (XRD), scanning electron microscopy (SEM), Brunauer-Emmett-Teller (BET), ultraviolet-visible (UV-vis) diffuse reflectance spectroscopy (DRS), photocurrent responses, and electrochemical impedance spectra (EIS). It is found that the as-prepared BiVO₄ samples had a porous structure with aperture diameter of 50-300 nm...
August 11, 2016: Materials
Janos Baombe
No abstract text is available yet for this article.
August 2017: Emergency Medicine Journal: EMJ
Ya Chen, Bin Wang, Xiaoqing Wang, Lin-Hua Xie, Jinping Li, Yabo Xie, Jian-Rong Li
Copper(II)-paddlewheel-based metal-organic frameworks (CP-MOFs) represent a unique subclass of MOFs with highly predictable porous structures, facile syntheses, and functional open metal sites. However, the lack of high hydrolytic stability is an obstacle for CP-MOFs in many practical applications. In this work, we report a new CP-MOF, [Cu4(tdhb)] (BUT-155), which is constructed from a judiciously designed carboxylate ligand with high coordination connectivity (octatopic), abundant hydrophobic substituents (six methyl groups), and substituent constrained geometry (tetrahedral backbone), tdhb(8-) [H8tdhb = 3,3',5,5'-tetrakis(3,5-dicarboxyphenyl)-2,2',4,4',6,6'-hexamethylbiphenyl)]...
August 16, 2017: ACS Applied Materials & Interfaces
Sihui Zhan, He Zhang, Yu Zhang, Qiang Shi, Yi Li, XiuJun Li
To eliminate nitrogen oxides (NOx), a series of highly ordered mesoporous WO3(χ)-CeO2 nanomaterials (χ represents the mole ratio of W/Ce) were synthesized by using KIT-6 as a hard template, which was used for selective catalytic reduction (SCR) to remove NOx with NH3 at low temperatures. Moreover, the nanomaterials were characterized by TEM, XRD, Raman, XPS, BET, H2-TPR, NH3-TPD and in situ DRIFTS. It can be found that all of the prepared mesoporous WO3(χ)-CeO2 (χ = 0, 0.5, 0.75, 1 and 1.25) showed highly ordered mesoporous channels...
April 2017: Applied Catalysis. B, Environmental
Jony Saha, Debarati Roy Chowdhury, Priyajit Jash, Amit Paul
We report a simple approach for the synthesis of cobalt phosphonate (CoOP) nanocages with two distinct types of pore diameters by utilizing a novel tetra-constituent assembly of CoCl2 ⋅6 H2 O, nitrilotris(methylene)triphosphonic acid (NMPA), F127 surfactant, and polyvinyl alcohol (PVA, co-surfactant). Transmission electron microscopy images revealed the formation of large nanocages in spheres (pore diameter: 20-60 nm) and the existence of narrow micro/mesopores (pore diameter: 1.5-5 nm) on their walls...
June 30, 2017: Chemistry: a European Journal
Xiang Zhu, Shunmin Ding, Carter W Abney, Katie L Browning, Robert L Sacci, Gabriel M Veith, Chengcheng Tian, Sheng Dai
A superacid-promoted "knitting" strategy has been developed for the generation of a novel family of hypercrosslinked nanoporous polycarbazoles for efficient CO2 capture. Using trifluoromethanesulfonic acid, a Brønsted superacid, we demonstrate the facile and rapid synthesis of highly porous polycarbazoles with BET surface areas as high as 1688 m(2) g(-1), and capable of adsorbing 3.5 mmol g(-1) of CO2 at 298 K and 1 bar. This impressive result bestows the material with the highest CO2 uptake capacity for all nanoporous carbazolic polymers and ranks among the best by known porous organic polymers under this condition...
July 4, 2017: Chemical Communications: Chem Comm
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