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  1. Article ; Online: Effective aqueous chromate treatment using triethanolamine anacardate coated magnetic nanoparticles.

    Bui, Nghia Tan / Le, Linh Chi / Hoang, Thanh T / Nguyen, Hang Thi / Tran, Ngoc Thi Thanh / Hoang, Tuan K A

    Environmental research

    2023  Volume 226, Page(s) 115675

    Abstract: Low-cost adsorbents derived from agricultural by-products incorporated magnetic nanoparticles (NPs) are promising for wastewater treatment. They are always preferred due to their great performance and easy separation. This study reports cobalt ... ...

    Abstract Low-cost adsorbents derived from agricultural by-products incorporated magnetic nanoparticles (NPs) are promising for wastewater treatment. They are always preferred due to their great performance and easy separation. This study reports cobalt superparamagnetic (CoFe
    MeSH term(s) Chromates ; Spectroscopy, Fourier Transform Infrared ; Magnetite Nanoparticles/chemistry ; Adsorption ; Water Pollutants, Chemical/analysis ; Hydrogen-Ion Concentration ; Kinetics
    Chemical Substances chromium hexavalent ion (18540-29-9) ; Chromates ; triethanolamine (9O3K93S3TK) ; Magnetite Nanoparticles ; Water Pollutants, Chemical
    Language English
    Publishing date 2023-03-10
    Publishing country Netherlands
    Document type Journal Article
    ZDB-ID 205699-9
    ISSN 1096-0953 ; 0013-9351
    ISSN (online) 1096-0953
    ISSN 0013-9351
    DOI 10.1016/j.envres.2023.115675
    Database MEDical Literature Analysis and Retrieval System OnLINE

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    Zs.A 726: Show issues Location:
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  2. Article ; Online: Effective aqueous chromate treatment using triethanolamine anacardate coated magnetic nanoparticles

    Bui, Nghia Tan / Le, Linh Chi / Hoang, Thanh T. / Nguyen, Hang Thi / Tran, Ngoc Thi Thanh / Hoang, Tuan K.A.

    Environmental Research. 2023 June, v. 226 p.115675-

    2023  

    Abstract: Low-cost adsorbents derived from agricultural by-products incorporated magnetic nanoparticles (NPs) are promising for wastewater treatment. They are always preferred due to their great performance and easy separation. This study reports cobalt ... ...

    Abstract Low-cost adsorbents derived from agricultural by-products incorporated magnetic nanoparticles (NPs) are promising for wastewater treatment. They are always preferred due to their great performance and easy separation. This study reports cobalt superparamagnetic (CoFe₂O₄) nanoparticles (NPs) incorporated with triethanolamine (TEA) based surfactants from cashew nut shell liquid, namely TEA-CoFe₂O₄, for the removal of chromium (VI) ions from aqueous solutions. To have detailed characteristics of the morphology and structural properties, scanning electron microscopy (SEM), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR) and vibrating sample magnetometry (VSM) were employed. The fabricated TEA-CoFe₂O₄ particles exhibit soft and superparamagnetic properties, which make the nanoparticles easily recycled by using a magnet. Chromate adsorption on the TEA-CoFe₂O₄ nanomaterials reached an optimal efficiency of 84.3% at pH = 3 with the initial adsorbent dose of 10 g/L and chromium (VI) concentration of 40 mg/L. The TEA-CoFe₂O₄ nanoparticles can maintain the effective adsorption of chromium (VI) ion (by 29% of efficiency loss) and retain the magnetic separation using a magnet up to three cycles of the regeneration, which promise a high potential of this low-cost adsorbent for long-term treatment of heavy metal ions from polluted waters.
    Keywords Fourier transform infrared spectroscopy ; X-ray diffraction ; adsorbents ; adsorption ; cashew nuts ; chromates ; chromium ; cobalt ; electron microscopy ; heavy metals ; hulls ; liquids ; magnetic materials ; magnetic separation ; magnetism ; nanoparticles ; pH ; research ; wastewater treatment ; Magnetic nanoparticles ; Cashew nut shell liquid ; Triethanolamine anacardate ; Chromate treatment ; Reusability
    Language English
    Dates of publication 2023-06
    Publishing place Elsevier Inc.
    Document type Article ; Online
    ZDB-ID 205699-9
    ISSN 1096-0953 ; 0013-9351
    ISSN (online) 1096-0953
    ISSN 0013-9351
    DOI 10.1016/j.envres.2023.115675
    Database NAL-Catalogue (AGRICOLA)

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    In stock of ZB MED Cologne/Königswinter

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  3. Article ; Online: Enhancing the removal efficiency of methylene blue in water by fly ash

    Dinh, Nga Thi / Vo, Linh Ngoc Hoang / Tran, Ngoc Thi Thanh / Phan, Tuan Dinh / Nguyen, Duc Ba

    RSC advances

    2021  Volume 11, Issue 33, Page(s) 20292–20302

    Abstract: An effective adsorbent of methylene blue was synthesized from coal fly ash (FA; waste material from a coal power plant) by a denaturing process with an alkaline solution at 90 °C. The denatured fly ash (D-FA) has a surface area and pore volume of 66.39 ... ...

    Abstract An effective adsorbent of methylene blue was synthesized from coal fly ash (FA; waste material from a coal power plant) by a denaturing process with an alkaline solution at 90 °C. The denatured fly ash (D-FA) has a surface area and pore volume of 66.39 m
    Language English
    Publishing date 2021-06-07
    Publishing country England
    Document type Journal Article
    ISSN 2046-2069
    ISSN (online) 2046-2069
    DOI 10.1039/d1ra02637b
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article: Enhancing the removal efficiency of methylene blue in water by fly ash via a modified adsorbent with alkaline thermal hydrolysis treatment

    Dinh, Nga Thi / Vo, Linh Ngoc Hoang / Tran, Ngoc Thi Thanh / Phan, Tuan Dinh / Nguyen, Duc Ba

    RSC advances. 2021 June 07, v. 11, no. 33

    2021  

    Abstract: An effective adsorbent of methylene blue was synthesized from coal fly ash (FA; waste material from a coal power plant) by a denaturing process with an alkaline solution at 90 °C. The denatured fly ash (D-FA) has a surface area and pore volume of 66.39 m² ...

    Abstract An effective adsorbent of methylene blue was synthesized from coal fly ash (FA; waste material from a coal power plant) by a denaturing process with an alkaline solution at 90 °C. The denatured fly ash (D-FA) has a surface area and pore volume of 66.39 m² g⁻¹ and 15.33 cm³ g⁻¹, respectively, whereas the values of the original FA are negligible, i.e., 3.55 m² g⁻¹ and 0.02 cm³ g⁻¹. The removal of methylene blue (MB) in aqueous solution by D-FA was increased in the range of initial MB concentration (10–20 mg L⁻¹); contact time (0–120 min); pH (2–8); D-FA dosage (1–4 g L⁻¹). However, a larger value of those operational parameters would not improve the removal activity. Furthermore, the methylene blue adsorption on the denatured FA was fitted with the Langmuir model with R² = 0.9991; the maximum adsorption capacity was determined as 28.65 mg g⁻¹ from the model. Overall, the highest removal efficiency of MB using D-FA with the dosage of 4 g L⁻¹ was 97.1% in 30 mg L⁻¹ solution of methylene blue at pH = 7. The alkaline hydrothermal denaturation of waste FA is a promising approach to produce an adsorbent with beneficial environmental engineering applications.
    Keywords adsorbents ; adsorption ; aqueous solutions ; coal ; coal fly ash ; denaturation ; methylene blue ; models ; pH ; power plants ; sorption isotherms ; surface area ; thermal hydrolysis
    Language English
    Dates of publication 2021-0607
    Size p. 20292-20302.
    Publishing place The Royal Society of Chemistry
    Document type Article
    ISSN 2046-2069
    DOI 10.1039/d1ra02637b
    Database NAL-Catalogue (AGRICOLA)

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  5. Article ; Online: Direct synthesis of Rev peptide-conjugated gold nanoparticles and their application in cancer therapeutics.

    Tran, Ngoc Thi Thanh / Wang, Tzu-Hao / Lin, Chiao-Yun / Tsai, Yi-Chun / Lai, Chyong-Huey / Tai, Yian / Yung, Benjamin Y M

    Bioconjugate chemistry

    2011  Volume 22, Issue 7, Page(s) 1394–1401

    Abstract: We have developed a simple approach for generating peptide-conjugated gold nanoparticles (AuNPs) from the Rev peptide and gold aqueous solution. The peptide functions as both a reducing agent and a capping molecule. AuNPs of various sizes (20-300 nm) and ...

    Abstract We have developed a simple approach for generating peptide-conjugated gold nanoparticles (AuNPs) from the Rev peptide and gold aqueous solution. The peptide functions as both a reducing agent and a capping molecule. AuNPs of various sizes (20-300 nm) and shapes (spheres, triangular plates, and polygons) can be obtained upon modulating the ratio of gold ions to the Rev peptide. Transmission electron microscopy, X-ray diffraction, and UV-vis spectroscopy were utilized to characterize these nanoparticles. Fourier-transform infrared and X-ray photoelectron spectroscopy measurements were performed to investigate chemical interactions between the Rev peptide and AuNPs. Lactate dehydrogenase and 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide assays revealed that the Rev peptide-AuNP nanocomposites exhibited exceptionally high cytotoxic effects toward mouse ovarian surface epithelial cell lines, relative to the effects of equal doses of the free Rev peptide. Our study suggests a new way of utilizing biomolecule-conjugated AuNPs as potentially effective anticancer drugs.
    MeSH term(s) Animals ; Antineoplastic Agents/chemistry ; Antineoplastic Agents/pharmacology ; Cell Line ; Cell Survival/drug effects ; Gold/chemistry ; Gold/pharmacology ; Mice ; Nanoparticles/chemistry ; Nanoparticles/ultrastructure ; Neoplasms/drug therapy ; Particle Size ; Peptides/chemistry ; Peptides/pharmacology
    Chemical Substances Antineoplastic Agents ; Peptides ; Rev peptide ; Gold (7440-57-5)
    Language English
    Publishing date 2011-07-20
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 1024041-x
    ISSN 1520-4812 ; 1043-1802
    ISSN (online) 1520-4812
    ISSN 1043-1802
    DOI 10.1021/bc2001215
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    Zs.A 3400: Show issues Location:
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  6. Article: Synthesis of methotrexate-conjugated gold nanoparticles with enhanced cancer therapeutic effect

    Tran, Ngoc Thi Thanh / Wang, Tzu-Hao / Lin, Chiao-Yun / Tai, Yian

    Biochemical engineering journal

    Volume v. 78

    Abstract: We have developed a simple approach to synthesize gold nanoparticle (AuNP) by utilizing the anti-cancer drug, methotrexate (MTX), as both the reducing agent and the capping molecule. MTX-conjugated AuNPs (MTX-AuNPs) of various sizes (∼3 and ∼20nm) can be ...

    Abstract We have developed a simple approach to synthesize gold nanoparticle (AuNP) by utilizing the anti-cancer drug, methotrexate (MTX), as both the reducing agent and the capping molecule. MTX-conjugated AuNPs (MTX-AuNPs) of various sizes (∼3 and ∼20nm) can be obtained in a one-pot synthesis. We utilized transmission electron microscopy, X-ray diffraction, and UV–vis spectroscopy to characterize these nanoparticles, and Fourier-transform infrared (FTIR) spectroscopy and Raman spectroscopy to investigate the chemical interactions between the MTX and AuNPs. To examine the cancer therapeutic effect of these nanoparticles, we applied the lactate dehydrogenase (LDH) and 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) assay tests. The results demonstrated that the MTX-AuNPs of small size (∼3nm) exhibited considerably high cytotoxic effects in human choriocarcinoma cell lines compared to the effects of equal doses of free MTX; these results suggest that anti-cancer drug-conjugated AuNPs have an enhanced therapeutic effect.
    Keywords transmission electron microscopy ; therapeutics ; nanogold ; lactate dehydrogenase ; cytotoxicity ; chemical interactions ; humans ; methotrexate ; X-ray diffraction ; Raman spectroscopy ; reducing agents ; nanoparticles ; Fourier transform infrared spectroscopy
    Language English
    Document type Article
    ISSN 1369-703X
    Database AGRIS - International Information System for the Agricultural Sciences and Technology

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