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  1. AU="Pham, Ngo Nghia"
  2. AU="Eeg-Olofsson, Karin Edebol"
  3. AU="Hosokawa, Yuri"
  4. AU="Christophi, Christopher"
  5. AU="Ren, Zhiyun"
  6. AU="Sabari, Benjamin R"
  7. AU="Sellal, Nabila"
  8. AU="Kamei, Yoshiki"
  9. AU="Htun Nyunt, Oo"
  10. AU="Lalonde, Donald H"
  11. AU=Olliaro Piero L AU=Olliaro Piero L
  12. AU="Fortney, J J"

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  1. Artikel: Preparation and Desalination Performance of PA/UiO-66/PES Composite Membranes.

    Trinh, Dai Xuan / Pham, Ngo Nghia / Chammingkwan, Patchanee / Taniike, Toshiaki

    Membranes

    2021  Band 11, Heft 8

    Abstract: UiO-66 nanoparticles are considered highly potential fillers for the application in desalination membranes. In this study, UiO-66 nanoparticles were anchored to PES membrane substrates, which were subsequently subjected to the interfacial polymerization ... ...

    Abstract UiO-66 nanoparticles are considered highly potential fillers for the application in desalination membranes. In this study, UiO-66 nanoparticles were anchored to PES membrane substrates, which were subsequently subjected to the interfacial polymerization reaction to coat a layer of polyamide (PA) on their surface. For comparison, a blank membrane incorporating no UiO-66 and a reference membrane incorporating ZrO
    Sprache Englisch
    Erscheinungsdatum 2021-08-16
    Erscheinungsland Switzerland
    Dokumenttyp Journal Article
    ZDB-ID 2614641-1
    ISSN 2077-0375
    ISSN 2077-0375
    DOI 10.3390/membranes11080628
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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  2. Artikel ; Online: Microplastics and trace metals in river sediment: Prevalence and correlation with multiple factors.

    Nguyen, Thi Lan Huong / Duong, Thi Lim / Nguyen, Thi Huong Thuy / Dang, Tran Quan / Nguyen, Thi Hue / Dao, Ngoc Nhiem / Nguyen, Kien Trung / Duong, Cong Dien / Pham, Ngo Nghia / Nguyen, Bac Quang

    The Science of the total environment

    2023  Band 895, Seite(n) 165145

    Abstract: Microplastics (MPs), which are ubiquitous, are no longer novel emerging pollutants, yet our knowledge of them is insufficient. This study investigates the prevalence of MPs and trace metals in sediment belonging to Ma River, Vietnam, and their ... ...

    Abstract Microplastics (MPs), which are ubiquitous, are no longer novel emerging pollutants, yet our knowledge of them is insufficient. This study investigates the prevalence of MPs and trace metals in sediment belonging to Ma River, Vietnam, and their interaction with various parameters, including nutrients such as total carbon (TC), total nitrogen (TN), and total phosphorus (TP), grain sizes, and MPs in surface water. The study revealed that the abundance of MPs in sediment (MPs/S) is relatively high (i.e., 1328.3 ± 1925.5 items.kg
    Sprache Englisch
    Erscheinungsdatum 2023-06-28
    Erscheinungsland Netherlands
    Dokumenttyp Journal Article
    ZDB-ID 121506-1
    ISSN 1879-1026 ; 0048-9697
    ISSN (online) 1879-1026
    ISSN 0048-9697
    DOI 10.1016/j.scitotenv.2023.165145
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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  3. Artikel: A comparative study of 0D and 1D Ce-ZnO nanocatalysts in photocatalytic decomposition of organic pollutants

    Luu, Thi Viet Ha / Nguyen, Quang Bac / Dao, Ngoc Nhiem / Luu, Minh Dai / Doan, Van Dat / Pham, Ngoc Chuc / Duong, Thi Lim / Pham, Ngo Nghia

    RSC advances. 2021 Nov. 09, v. 11, no. 57

    2021  

    Abstract: Nanosized zinc oxide is an intriguing material that can be applied in various fields. In this study, Ce doped ZnO nano-catalysts (Ce-ZnO) were synthesized by two different methods (i.e., hydrothermal (Ce-ZnO-HT) and polymer gel combustion (Ce-ZnO-CB) ... ...

    Abstract Nanosized zinc oxide is an intriguing material that can be applied in various fields. In this study, Ce doped ZnO nano-catalysts (Ce-ZnO) were synthesized by two different methods (i.e., hydrothermal (Ce-ZnO-HT) and polymer gel combustion (Ce-ZnO-CB) methods) to compare their photodegradation efficiency. The prepared material characteristics were investigated using XRD, SEM, TEM, FTIR, UV-Vis, PL, XPS, EDS, and BET. The bandgap of both nanoparticles (NPs) was 2.95 eV, despite the fact that the morphology of Ce-ZnO-HT NPs was 1D-rod-shaped and that of Ce-ZnO-CB NPs was 0D-spherical. However, the surface area and oxygen vacancy rate of Ce-ZnO-HT NPs were higher than those of Ce-ZnO-CB NPs. These differences are directly related to the photocatalytic activity of Ce-ZnO NPs. Accordingly, the results showed that photocatalytic efficiency was classified in the order Ce-ZnO-HT > Ce-ZnO-CB > pure ZnO, and the photocatalytic reaction rate constant of Ce-ZnO-HT used to decompose MB was 3.0 times higher than that of Ce-ZnO-CB. Interestingly, the photodegradation mechanism study revealed that hydroxyl radicals and holes were shown to be more important contributors to methyl blue degradation than photo-induced electrons and superoxide radical ions.
    Schlagwörter combustion ; comparative study ; gels ; nanocatalysts ; oxygen ; photocatalysis ; photolysis ; polymers ; superoxide anion ; surface area ; zinc oxide
    Sprache Englisch
    Erscheinungsverlauf 2021-1109
    Umfang p. 36078-36088.
    Erscheinungsort The Royal Society of Chemistry
    Dokumenttyp Artikel
    ISSN 2046-2069
    DOI 10.1039/d1ra07493h
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  4. Artikel: Heavy metals in surface sediments of the intertidal Thai Binh Coast, Gulf of Tonkin, East Sea, Vietnam: distribution, accumulation, and contamination assessment

    Duong, Lim Thi / Nguyen, Bac Quang / Dao, Cham Dinh / Dao, Nhiem Ngoc / Nguyen, Huong Lan Thi / Nguyen, Thuy Huong Thi / Nguyen, Chi Ha Thi / Duong, Dien Cong / Pham, Ngo Nghia

    Environmental science and pollution research. 2022 June, v. 29, no. 27

    2022  

    Abstract: Heavy metals contamination in sediments may endanger ecosystems and human health via the food chain. In fact, there is little to no understanding about heavy metal accumulation in surface sediment of one of the most economically important marine bodies ... ...

    Abstract Heavy metals contamination in sediments may endanger ecosystems and human health via the food chain. In fact, there is little to no understanding about heavy metal accumulation in surface sediment of one of the most economically important marine bodies for Vietnam, the Thai Binh Coast, where five large rivers co-discharge into the Gulf of Tonkin. Twenty-seven surface sediment samples were collected from the intertidal regions and analyzed for: arsenic (As), cadmium (Cd), chromium (Cr), copper (Cu), mercury (Hg), nickel (Ni), and zinc (Zn) using inductively coupled plasma mass spectroscopy (ICP-MS). The studied area exhibited a large spatial variation in the concentration of heavy metals, e.g., the dry sediment concentration of Cd was the least (0.05–0.49 mg.kg⁻¹), whereas that of Zn was the greatest (45.4–252 mg.kg⁻¹). Based on the geoaccumulation index ([Formula: see text]), most of the studied heavy metals were accumulated at low pollution levels, except four locations exhibited moderately and highly polluted levels of Hg with [Formula: see text] Hg values from 1.92 to 2.66. However, the high contamination factor value implicated that not only Hg but also all other detected heavy metals in this area resulted from anthropogenic activities along the coast and the river upstream. This implied the need for quick action from the government. In addition, numerous analytical methods were used to see the association between metals, total organic carbon (TOC), and particle size distribution, including Pearson correlation coefficient (P) and principal component analysis (PCA). Hg demonstrates lowest connection with TOC (PHg₋TOC ~ 0) but individual heavy metal correlations are largely positive, with many reaching 1.0 (e.g., PNᵢ₋Cᵣ = 0.89, PCd₋Aₛ = 0.72, PNᵢ₋Cᵤ = 0.76, and PCᵤ₋Cᵣ = 0.72). From the PCA diagram, we can observe that those sampling points in the positive direction of PC1 were expected to have a high concentration of Cu, Zn, As, Ni while having extremely little sand content.
    Schlagwörter coasts ; food chain ; heavy metals ; human health ; littoral zone ; mass spectrometry ; particle size distribution ; pollution ; principal component analysis ; research ; rivers ; sand fraction ; sediments ; total organic carbon ; zinc ; Vietnam
    Sprache Englisch
    Erscheinungsverlauf 2022-06
    Umfang p. 41261-41271.
    Erscheinungsort Springer Berlin Heidelberg
    Dokumenttyp Artikel
    ZDB-ID 1178791-0
    ISSN 1614-7499 ; 0944-1344
    ISSN (online) 1614-7499
    ISSN 0944-1344
    DOI 10.1007/s11356-022-18881-0
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    Verfügbar in ZB MED Bonn

    Z 5915: Hefte anzeigen

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  5. Artikel ; Online: Heavy metals in surface sediments of the intertidal Thai Binh Coast, Gulf of Tonkin, East Sea, Vietnam: distribution, accumulation, and contamination assessment.

    Duong, Lim Thi / Nguyen, Bac Quang / Dao, Cham Dinh / Dao, Nhiem Ngoc / Nguyen, Huong Lan Thi / Nguyen, Thuy Huong Thi / Nguyen, Chi Ha Thi / Duong, Dien Cong / Pham, Ngo Nghia

    Environmental science and pollution research international

    2022  Band 29, Heft 27, Seite(n) 41261–41271

    Abstract: Heavy metals contamination in sediments may endanger ecosystems and human health via the food chain. In fact, there is little to no understanding about heavy metal accumulation in surface sediment of one of the most economically important marine bodies ... ...

    Abstract Heavy metals contamination in sediments may endanger ecosystems and human health via the food chain. In fact, there is little to no understanding about heavy metal accumulation in surface sediment of one of the most economically important marine bodies for Vietnam, the Thai Binh Coast, where five large rivers co-discharge into the Gulf of Tonkin. Twenty-seven surface sediment samples were collected from the intertidal regions and analyzed for: arsenic (As), cadmium (Cd), chromium (Cr), copper (Cu), mercury (Hg), nickel (Ni), and zinc (Zn) using inductively coupled plasma mass spectroscopy (ICP-MS). The studied area exhibited a large spatial variation in the concentration of heavy metals, e.g., the dry sediment concentration of Cd was the least (0.05-0.49 mg.kg
    Mesh-Begriff(e) Arsenic/analysis ; Cadmium/analysis ; China ; Chromium/analysis ; Ecosystem ; Environmental Monitoring/methods ; Geologic Sediments/chemistry ; Humans ; Mercury/analysis ; Metals, Heavy/analysis ; Organic Chemicals ; Risk Assessment ; Rivers/chemistry ; Thailand ; Vietnam ; Water Pollutants, Chemical/analysis
    Chemische Substanzen Metals, Heavy ; Organic Chemicals ; Water Pollutants, Chemical ; Cadmium (00BH33GNGH) ; Chromium (0R0008Q3JB) ; Mercury (FXS1BY2PGL) ; Arsenic (N712M78A8G)
    Sprache Englisch
    Erscheinungsdatum 2022-01-28
    Erscheinungsland Germany
    Dokumenttyp Journal Article
    ZDB-ID 1178791-0
    ISSN 1614-7499 ; 0944-1344
    ISSN (online) 1614-7499
    ISSN 0944-1344
    DOI 10.1007/s11356-022-18881-0
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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  6. Artikel: Strong Adsorption of Arsenite and Phosphate from Aqueous Solution Using La2O3–CeO2 Composite

    Nhiem, Dao Ngoc / Duc, Dao Hong / Lim, Duong Thi / Bac, Nguyen Quang / Chuc, Pham Ngoc / Dung, Doan Trung / Chi, Nguyen Thi Ha / Pham, Ngo Nghia / Trung, Do Quang / Mai, Nguyen Vu Ngoc / Mau, Tran Xuan / Khieu, Dinh Quang

    Journal of polymers and the environment. 2021 Apr., v. 29, no. 4

    2021  

    Abstract: In the present paper, the synthesis of La₂O₃–CeO₂ composite using the sol–gel combustion method with gelatin as a template and its application for arsenite and phosphate removal are demonstrated. The obtained composite was characterized using thermal ... ...

    Abstract In the present paper, the synthesis of La₂O₃–CeO₂ composite using the sol–gel combustion method with gelatin as a template and its application for arsenite and phosphate removal are demonstrated. The obtained composite was characterized using thermal analysis (TG–DTA), X-ray diffraction (XRD), transmission electron microscopy (TEM), high-resolution transmission electron microscopy (HR-TEM), and energy-dispersive X-ray spectroscopy elemental mapping (EDX-elemental mapping). It is found that the La–Ce bimetallic oxide consists of nanoparticles of La₂O₃ and CeO₂ with a size of around 10–20 nm. The La₂O₃ and CeO₂ particles in the composite are highly dispersed. The adsorption of arsenite and phosphate from aqueous solutions on the La₂O₃–CeO₂ composite was investigated at ambient temperature utilizing a batch technique. The arsenite and phosphate adsorption capacity derived from the Langmuir isotherm is 102.5 and 193.3 mg g⁻¹, respectively, which is higher than those reported in the previous papers. The material does not lose much capacity even after eight cycles. The high capacity for phosphate adsorption at low and high concentrations enables the La₂O₃–CeO₂ composite to become a potential material for water and wastewater treatment.
    Schlagwörter X-ray diffraction ; adsorption ; ambient temperature ; aqueous solutions ; arsenites ; combustion ; energy-dispersive X-ray analysis ; gelatin ; phosphates ; sorption isotherms ; transmission electron microscopy ; wastewater treatment
    Sprache Englisch
    Erscheinungsverlauf 2021-04
    Umfang p. 1310-1323.
    Erscheinungsort Springer US
    Dokumenttyp Artikel
    ZDB-ID 2017207-2
    ISSN 1572-8919 ; 1572-8900 ; 1566-2543
    ISSN (online) 1572-8919 ; 1572-8900
    ISSN 1566-2543
    DOI 10.1007/s10924-020-01967-6
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  7. Artikel ; Online: A comparative study of 0D and 1D Ce-ZnO nanocatalysts in photocatalytic decomposition of organic pollutants.

    Luu, Thi Viet Ha / Nguyen, Quang Bac / Dao, Ngoc Nhiem / Luu, Minh Dai / Doan, Van Dat / Pham, Ngoc Chuc / Duong, Thi Lim / Pham, Ngo Nghia

    RSC advances

    2021  Band 11, Heft 57, Seite(n) 36078–36088

    Abstract: Nanosized zinc oxide is an intriguing material that can be applied in various fields. In this study, Ce doped ZnO nano-catalysts (Ce-ZnO) were synthesized by two different methods ( ...

    Abstract Nanosized zinc oxide is an intriguing material that can be applied in various fields. In this study, Ce doped ZnO nano-catalysts (Ce-ZnO) were synthesized by two different methods (
    Sprache Englisch
    Erscheinungsdatum 2021-11-09
    Erscheinungsland England
    Dokumenttyp Journal Article
    ISSN 2046-2069
    ISSN (online) 2046-2069
    DOI 10.1039/d1ra07493h
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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  8. Artikel ; Online: Facile synthesis of 4- and 7-azaindoles from the corresponding imines by palladium-catalyzed cascade C-C and C-N coupling.

    Pham, Ngo Nghia / Dang, Thanh Tuan / Ngo, Ngoc Thang / Villinger, Alexander / Ehlers, Peter / Langer, Peter

    Organic & biomolecular chemistry

    2015  Band 13, Heft 21, Seite(n) 6047–6058

    Abstract: The cyclization of 2,3-dihalopyridines with readily available imines provides a convenient and regioselective approach to 4- and 7-azaindoles. The regioselectivity can be controlled by the choice of the halogen atoms at the pyridine ring (chlorine versus ...

    Abstract The cyclization of 2,3-dihalopyridines with readily available imines provides a convenient and regioselective approach to 4- and 7-azaindoles. The regioselectivity can be controlled by the choice of the halogen atoms at the pyridine ring (chlorine versus bromine).
    Mesh-Begriff(e) Catalysis ; Cyclization ; Halogenation ; Imines/chemical synthesis ; Imines/chemistry ; Indoles/chemical synthesis ; Indoles/chemistry ; Models, Molecular ; Palladium/chemistry ; Pyridines/chemical synthesis ; Pyridines/chemistry
    Chemische Substanzen 7-azaindole dimer ; Imines ; Indoles ; Pyridines ; Palladium (5TWQ1V240M)
    Sprache Englisch
    Erscheinungsdatum 2015-06-07
    Erscheinungsland England
    Dokumenttyp Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 2097583-1
    ISSN 1477-0539 ; 1477-0520
    ISSN (online) 1477-0539
    ISSN 1477-0520
    DOI 10.1039/c5ob00720h
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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