Department of Civil Engineering

Shogo Taniguchi

  (谷口 省吾)

Profile Information

Affiliation
Lecturer, Faculty of Engineering, Department of Civil Engineering, Osaka Sangyo University
Degree
博士(工学)(大阪産業大学)

J-GLOBAL ID
201801009016748370
researchmap Member ID
B000307497

Papers

 31
  • Shogo TANIGUCHI, Yoshiki UCHIYAMA, Ayumi HASHIGUCHI, Hiroaki OZAKI
    48(5) 270-277, Sep, 2019  Peer-reviewed
  • 橋口亜由未, 藤川陽子, 米田稔, 谷口省吾, 尾崎博明
    環境技術, 44(7) 391-401, Jul, 2015  Peer-reviewed
  • Rabindra Raj Giri, Hiroaki Ozaki, Xiao Guo, Ryohei Takanami, Shogo Taniguchi
    DESALINATION AND WATER TREATMENT, 54(13) 3625-3631, Jun, 2015  Peer-reviewed
    The usefulness of ultraviolet-C (UVC: 254nm) and vacuum UV (VUV: 185+ 254nm) photolysis for elimination and mineralization of four selected pharmaceutical compounds (PhCs) in mixed aqueous solution were tested in laboratory batch experiments. UVC photolysis was unable to eliminate moderate and refractory PhCs. Moreover, it was not at all useful for mineralization of the PhCs (<10% TOC removal, 30min reaction) and longer reaction period (i.e. 60min) had no significant positive impact on the mineralization efficiency. On the other hand, VUV photolysis eliminated the PhCs almost completely in a short reaction period irrespective of their nature, and 90% mineralization was achieved in an hour. The greatly enhanced elimination and mineralization efficiencies for VUV photolysis were attributed to accelerated direct and indirect photolysis reactions. Based on the results, it was concluded that VUV photolysis was very promising over UVC photolysis for mineralization of PhCs in mixed aqueous solution. However, more studies are necessary for practical applicability of the method in wastewater treatments.
  • 谷口省吾, 山田修, 尾崎博明
    セラミックス, 50(2) 104-108, Feb, 2015  Invited
  • Yoko Fujikawa, Masataka Sugahara, Tetsuo Honma, Sayaka Hirayama, Phan Do Hung, Shinji Sakurai, Hiroshi Yashima, Ayumi Hashiguchi, Shogo Taniguchi, Hiroaki Ozaki, Paul Lewtas
    e-Journal of Surface Science and Nanotechnology, 13 455-460, 2015  
    © 2015 The Surface Science Society of Japan. We have conducted a pilot study of a biological filtration (BF) system for low-cost arsenic (As) removal from groundwater containing both ferrous iron (Fe(II)) and arsenic (As). Throughout the study, we have observed that arsenite (As(III)) as well as arsenate (As(V)) could be removed with this system. In conventional water treatment technologies, the preoxidation of As(III) to As(V) by oxidizing chemical is a mandatory step for As(III) removal However, such a preoxidation unit has not been used in our BF pilot unit, and hence the mechanisms of As(III) removal by BF have been of interest. Using a flow-through column reactor that simulates the actual BF pond for analysis by X-ray absorption spectroscopy (XAS), we could observe the adsorption of As(III) in water onto iron hydroxides deposited on the biological filter. The time-resolved As K-edge X-ray absorption near-edge structure (XANES) spectra were obtained when the water containing As(III) and Fe(II) was continuously fed to the reactor. An increase in the absorption intensity of the X-ray with time was clearly observed in the time-resolved spectra, indicating that the spectra represented the concentration and chemical state of As adsorbed at the solid-liquid interface of the biological filter. The XAS results also show that while the original water fed to the reactor was supposed to contain only As(III) and Fe(II), a small portion of As(III) was oxidized to As(V) in the influent line when the As(III) solution met the Fe(II) solution before flowing into the reactor. Consequently, besides As(III), As(V) probably formed by the oxidation of As(III) in the influent, was detected on the filter by XAS. The results demonstrate that, in BF, mechanisms of As(III) removal are at least partially explained by the adsorption of As(III) in the raw water to the biological filter as it is.

Misc.

 7

Presentations

 25
  • Nanthapong Chantaraprachoom, Bingzi Chen, Tatsuhide Hamasaki, Shogo Taniguchi, Tadao Mizuno
    第30回年次研究講演会, Nov 25, 2021, 特定非営利活動法人日本オゾン協会
    Even though O3/H2O2 based AOP has been proven to be an effective polishing treatment for sewage effluent, some of organic compounds were still found after treatment as the TOC value of treated sample was around 1 mg/L. In pursue of identifying these remaining substances, High Performance HPSEC-OCD was used to determine range of AMW of the remaining substances. In this study, four HPSEC-OCD results were observed and compared: (a) sewage effluent before AOP, (b) after ozone only treatment, (c) after ozonation with hydrogen peroxide addition in the beginning, (d) after ozonation with hydrogen peroxide continuously added. HPSEC-OCD chromatograms show that biopolymer in AMW range of 30,000 Da and LMW neutrals in AMW range of 500 Da were removed in all cases. However, humic substances and building blocks in AMW range of 2,700 and 2,000 Da are only removed in presence of hydrogen peroxide. LMW acids in which has AMW range of 1,100-1,200 Da were found irremovable. Furthermore, concentration in this AMW range increased after all treatment. The increase was hypothesized to be by-products of AOP reactions with larger molecules.
  • 陳冰子, Nanthapong Chantaraprachoom, 濱崎竜英, 谷口省吾, 水野忠雄
    第30回年次研究講演会, Nov 25, 2021, 特定非営利活動法人日本オゾン協会
    本研究は、回分式実験によりオゾンと4種の人工甘味料の反応量論について検討した。初期人工甘味料濃度を0.2 mmol/L、オゾン水濃度を0.0015〜0.0096 mmol/Lとして2分間反応させた。スクラロースについてはほとんど分解せず、オゾンの減少も少なかったことからほとんど反応が起こっていないと考えられた。サッカリン二水和物、アスパルテーム、アセスルファムカリウムは、オゾン1 molに対して、それぞれ0.92 mol、ア0.67 mol、1.1 mol分解することが確認できた。
  • 濱崎竜英, 陳冰子, 谷口省吾, 橋口亜由未, 水野忠雄
    日本オゾン協会第29回年次研究講演会, Jan 12, 2021, 特定非営利活動法人日本オゾン協会
    A basic experiment was conducted using a batch type experimental device for confirmation of artificial sweetener decomposition amount with respect to ozone consumption. The artificial sweeteners used in the experiment was saccharin sodium dihydrate. Ozone water with an actual measurement value of 7.8 mg/L was gradually mixed with ultrapure water to make 50 mL, it injected into 100 mL of artificial sweetener 0.1 mmol/L. The experiment time was 2 minutes. As a result of the experiment, saccharin sodium dihydrate was decomposed by 0.5 mol with respect to 1 mol of ozone.
  • 陳冰子, 李程, 谷口省吾, 濱崎竜英, 水野忠雄
    特定非営利活動法人日本オゾン協会第28回年次研究講演会, Jun 21, 2019, Japan Ozone Association
    An O3 oxidation process and an O3/H2O2 advanced oxidation process were experimentally examined to decompose artificial sweeteners, which have the tendency to accumulate in ambient water. The artificial sweeteners examined in this experiment were saccharin sodium dihydrate, sucralose, aspartame, and acesulfame K. Decomposition of these sweeteners was achieved via both an O3 oxidation process and an O3/H2O2 advanced oxidation process. However, our results showed that organic byproducts were formed using both the processes.
  • 濱崎竜英, 陳冰子, 谷口省吾, 水野忠雄, 津野洋
    特定非営利活動法人日本オゾン協会第28回年次研究講演会, Jun 21, 2019, Japan Ozone Association
    As a follow up to our previously reported work, an advanced oxidation process involving O3/H2O2 was examined for decomposing organic matter in the effluent obtained from a final sedimentation tank, which was a part of the biological treatment process for sewage. The experiment was conducted using three addition methods of H2O2, which were addition at the beginning once, two-steps addition and continuance addition. The rate of decomposition was evaluated by calculating the rates of TOC decomposition, O3 consumption and H2O2 consumption. In case of this study, the continuance addition method decreased to 3.0 mgC/L, it was the lowest in the other methods.

Teaching Experience

 5

Research Projects

 10

研究テーマ

 2
  • 研究テーマ(英語)
    微量汚染物質を対象とした廃水処理方法の開発
    研究期間(開始)(英語)
    2012/04/01
  • 研究テーマ(英語)
    水および土壌等の環境における新規微量汚染物質の分析法の開発
    研究期間(開始)(英語)
    2012/04/01

免許・資格

 1
  • 免許・資格名(英語)
    公害防止管理者 水質関係第1種
    取得年月日(英語)
    2017/12/15