The Experts below are selected from a list of 33 Experts worldwide ranked by ideXlab platform

Assiyeh Alizadeh S Tabatabai - One of the best experts on this subject based on the ideXlab platform.

  • mitigation of algal organic matter released from chaetoceros affinis and Hymenomonas by in situ generated ferrate
    Chemosphere, 2018
    Co-Authors: Bhaskar Jyoti Deka, Sanghyun Jeong, Assiyeh Alizadeh S Tabatabai, Alicia Kyoungjin An
    Abstract:

    This research was financially supported by the Research Grants Council of Hong Kong for Early Career Scheme (Project number: 21201316) and General Research Fund (Project number: 11207717), and Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education (2017R1A6A3A04004335).

  • mitigation of algal organic matter released from chaetoceros affinis and Hymenomonas by in situ generated ferrate
    Chemosphere, 2018
    Co-Authors: Bhaskar Jyoti Deka, Sanghyun Jeong, Assiyeh Alizadeh S Tabatabai
    Abstract:

    Abstract This study demonstrates the application of in situ ferrate (Fe(VI)) for the efficient removal of dissolved algal organic matter (AOM) from seawater. Sodium hypochlorite (NaOCl) and ferric (Fe(III)) were used to produce in situ Fe(VI) by wet chemical oxidation. First, the removal efficiencies of two model AOM compounds, humic acid (HA) and sodium alginate (SA), were evaluated in the presence of sodium chloride with an initial influent dissolved organic carbon (DOC) concentration of 5.0 mg C L−1 at different pH levels to establish the optimal doses for in situ Fe(VI) generation. The concentration of Fe(VI) was determined by the 2,2-Azino-bis (3-ethylbenzothiazoline-6-sulfonic acid) ultraviolet–visible spectrophotometry method. In the case of HA, 72% DOC removal was recorded when applied with 1.5 mg L−1 of Fe(III) and 1.5 mg L−1 of NaOCl (in situ Fe(VI) concentration of 1.46 mg L−1) while 42% DOC removal was observed for SA. Subsequently, the removal of AOM extracted from two bloom-forming algal species, Chaetoceros affinis (CA) and Hymenomonas (Hym), cultivated in seawater from the Red Sea, were tested with in situ generated Fe(VI) at the established optimum condition. In situ Fe(VI) recorded superior performance in removing AOM extracted from CA and Hym, showing 83% and 92% DOC removal when the influent DOC concentrations were 2.48 and 2.63 mg L−1, respectively. A detailed AOM characterization was conducted using liquid chromatography–organic carbon detection.

Bhaskar Jyoti Deka - One of the best experts on this subject based on the ideXlab platform.

  • mitigation of algal organic matter released from chaetoceros affinis and Hymenomonas by in situ generated ferrate
    Chemosphere, 2018
    Co-Authors: Bhaskar Jyoti Deka, Sanghyun Jeong, Assiyeh Alizadeh S Tabatabai, Alicia Kyoungjin An
    Abstract:

    This research was financially supported by the Research Grants Council of Hong Kong for Early Career Scheme (Project number: 21201316) and General Research Fund (Project number: 11207717), and Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education (2017R1A6A3A04004335).

  • mitigation of algal organic matter released from chaetoceros affinis and Hymenomonas by in situ generated ferrate
    Chemosphere, 2018
    Co-Authors: Bhaskar Jyoti Deka, Sanghyun Jeong, Assiyeh Alizadeh S Tabatabai
    Abstract:

    Abstract This study demonstrates the application of in situ ferrate (Fe(VI)) for the efficient removal of dissolved algal organic matter (AOM) from seawater. Sodium hypochlorite (NaOCl) and ferric (Fe(III)) were used to produce in situ Fe(VI) by wet chemical oxidation. First, the removal efficiencies of two model AOM compounds, humic acid (HA) and sodium alginate (SA), were evaluated in the presence of sodium chloride with an initial influent dissolved organic carbon (DOC) concentration of 5.0 mg C L−1 at different pH levels to establish the optimal doses for in situ Fe(VI) generation. The concentration of Fe(VI) was determined by the 2,2-Azino-bis (3-ethylbenzothiazoline-6-sulfonic acid) ultraviolet–visible spectrophotometry method. In the case of HA, 72% DOC removal was recorded when applied with 1.5 mg L−1 of Fe(III) and 1.5 mg L−1 of NaOCl (in situ Fe(VI) concentration of 1.46 mg L−1) while 42% DOC removal was observed for SA. Subsequently, the removal of AOM extracted from two bloom-forming algal species, Chaetoceros affinis (CA) and Hymenomonas (Hym), cultivated in seawater from the Red Sea, were tested with in situ generated Fe(VI) at the established optimum condition. In situ Fe(VI) recorded superior performance in removing AOM extracted from CA and Hym, showing 83% and 92% DOC removal when the influent DOC concentrations were 2.48 and 2.63 mg L−1, respectively. A detailed AOM characterization was conducted using liquid chromatography–organic carbon detection.

Sanghyun Jeong - One of the best experts on this subject based on the ideXlab platform.

  • mitigation of algal organic matter released from chaetoceros affinis and Hymenomonas by in situ generated ferrate
    Chemosphere, 2018
    Co-Authors: Bhaskar Jyoti Deka, Sanghyun Jeong, Assiyeh Alizadeh S Tabatabai, Alicia Kyoungjin An
    Abstract:

    This research was financially supported by the Research Grants Council of Hong Kong for Early Career Scheme (Project number: 21201316) and General Research Fund (Project number: 11207717), and Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education (2017R1A6A3A04004335).

  • mitigation of algal organic matter released from chaetoceros affinis and Hymenomonas by in situ generated ferrate
    Chemosphere, 2018
    Co-Authors: Bhaskar Jyoti Deka, Sanghyun Jeong, Assiyeh Alizadeh S Tabatabai
    Abstract:

    Abstract This study demonstrates the application of in situ ferrate (Fe(VI)) for the efficient removal of dissolved algal organic matter (AOM) from seawater. Sodium hypochlorite (NaOCl) and ferric (Fe(III)) were used to produce in situ Fe(VI) by wet chemical oxidation. First, the removal efficiencies of two model AOM compounds, humic acid (HA) and sodium alginate (SA), were evaluated in the presence of sodium chloride with an initial influent dissolved organic carbon (DOC) concentration of 5.0 mg C L−1 at different pH levels to establish the optimal doses for in situ Fe(VI) generation. The concentration of Fe(VI) was determined by the 2,2-Azino-bis (3-ethylbenzothiazoline-6-sulfonic acid) ultraviolet–visible spectrophotometry method. In the case of HA, 72% DOC removal was recorded when applied with 1.5 mg L−1 of Fe(III) and 1.5 mg L−1 of NaOCl (in situ Fe(VI) concentration of 1.46 mg L−1) while 42% DOC removal was observed for SA. Subsequently, the removal of AOM extracted from two bloom-forming algal species, Chaetoceros affinis (CA) and Hymenomonas (Hym), cultivated in seawater from the Red Sea, were tested with in situ generated Fe(VI) at the established optimum condition. In situ Fe(VI) recorded superior performance in removing AOM extracted from CA and Hym, showing 83% and 92% DOC removal when the influent DOC concentrations were 2.48 and 2.63 mg L−1, respectively. A detailed AOM characterization was conducted using liquid chromatography–organic carbon detection.

Wolfgang Schiller - One of the best experts on this subject based on the ideXlab platform.

  • Contribution to the biodiversity of the lower Frankfurt Formation (Miocene) in the Hanau Basin (Germany): a new Hymenomonas (calcareous nannoplankton) and a new Scrippsiella (dinoflagellate) species
    Palaeobiodiversity and Palaeoenvironments, 2017
    Co-Authors: Erlend Martini, Wolfgang Schiller
    Abstract:

    Fine-grained calcareous sediments often contain mass occurrences of well-preserved micro- and nannofossils, providing a wide range for biodiversity studies and enable to establish index-fossils. In our research, we depicted very tiny nannofossils which might be easily overlooked. Two new species Hymenomonas kelleri (calcareous nannoplankton) and Scrippsiella francofurtana (dinoflagellate, calcareous resting stage) are described, representing ecologically important forms. Their stratigraphic occurrence is documented from the lower part of the Frankfurt Formation (Miocene, Upper Hydrobia Beds). The collected sediment samples were taken from the temporary excavation site “WestendDuo” tower in the city of Frankfurt/Main, Germany. Both extremely small species show exceptionally fine structures and only slight signs of diagenesis. Their association with remains of further dinoflagellates and other species of algae ( S . francofurtana together with a mass occurrence of the calcareous nannoplankton species Coccolithus pelagicus ) as well as stromatoliths, shells of gastropods ( Hydrobia species) and skeletons of fishes ( Gobius species) gives hints to a highly diversed former biocoenosis and to a characteristic Miocene thanatocoenosis. Furthermore, a new mass occurrence of nannoplankton named layer +21 is described.

Alicia Kyoungjin An - One of the best experts on this subject based on the ideXlab platform.