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Katsumata H, Okada T, Kaneco S, Suzuki T, Ohta K. Degradation of fenitrothion by ultrasound/ferrioxalate/UV system. ULTRASONICS SONOCHEMISTRY 2010; 17:200-206. [PMID: 19592289 DOI: 10.1016/j.ultsonch.2009.06.011] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/18/2009] [Revised: 06/08/2009] [Accepted: 06/12/2009] [Indexed: 05/28/2023]
Abstract
The sonochemical photodegradation of fenitrothion, which is one of phosphorothiate insecticides, was carried out in the presence of Fe(III) and oxalate. The degradation rate was strongly influenced by initial concentrations of Fe(III) and oxalate. An initial fenitrothion concentration of 10 mg L(-1) was completely degraded after 30 min at pH 6 under the optimum conditions. Therefore, the photo-Fenton reaction combined with sonication in the presence of oxalate was available around neutral pH. The decrease of TOC as a result of mineralization of fenitrothion was observed during ultrasound (US)/ferrioxalate/UV process. In addition, the formations of nitrite and sulfate ions as end-products were observed during this degradation system. The decomposition of fenitrothion gave two kinds of intermediate products. The degradation mechanism of fenitrothion was proposed on the base of the evidence of the identified intermediates. Based on these results, US/ferrioxalate/UV system could be useful technology for the treatment of wastewater containing fenitrothion.
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Egusa K, Kaneco S, Kondou Y, Katsumata H, Suzuki T, Ohta K. Determination of Silver in Environmental Samples by Electrothermal Atomic Absorption Spectrometry after Preconcentration with Protein. BUNSEKI KAGAKU 2010. [DOI: 10.2116/bunsekikagaku.59.1113] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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53
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Katsumata H, Koike S, Kaneco S, Suzuki T, Ohta K. Degradation of Reactive Yellow 86 with photo-Fenton process driven by solar light. J Environ Sci (China) 2010; 22:1455-1461. [PMID: 21174979 DOI: 10.1016/s1001-0742(09)60275-8] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
The decolorization of Reactive Yellow 86 (RY 86), one of reactive azo dyes, was investigated in the presence of Fenton reagent under solar light irradiation. The decolorization rate was strongly influenced by pH, initial concentrations of H2O2 and Fe(II), and so on. An initial concentration of 40 mg/L was decolored more than 90% after 20 min under optimum conditions. The activation energy of the solar photo-Fenton reaction was 1.50 kJ/mol for RY 86 in the temperature range of 10-60 degrees C. In the kinetic study, the rate constant of RY 86 with OH. radicals could be estimated to be 1.7 x 10(10) L/(mol.sec). The decolorization efficiency of RY 86 under solar light irradiation was comparable to the artificial light irradiation. The decrease of TOC as a result of mineralization of RY 86 was observed during photo-Fenton process. The rate of RY 86 mineralization was about 83% under UV irradiation after 24 hr. The formation of chloride, sulfate, nitrate and ammonium ions as end-products was observed during the photocatalytic process. The decomposition of RY 86 gave two kinds of intermediate products. The degradation mechanism of RY 86 was proposed on the base of the identified intermediates.
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Katsumata H, Sada M, Nakaoka Y, Kaneco S, Suzuki T, Ohta K. Photocatalytic degradation of diuron in aqueous solution by platinized TiO2. JOURNAL OF HAZARDOUS MATERIALS 2009; 171:1081-1087. [PMID: 19604634] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Received: 04/30/2009] [Revised: 06/08/2009] [Accepted: 06/20/2009] [Indexed: 05/28/2023]
Abstract
The photocatalytic degradation of diuron, which is one of phenylurea herbicides, was carried out in the presence of platinized TiO(2) photocatalyst. Platinization was found to increase the rate of diuron degradation. When 0.2wt.% of platinum was deposited onto the surface of TiO(2), an initial diuron concentration of 10 mg L(-1) was completely degraded after 20 min. Furthermore, the first-order rate constant for diuron degradation by Pt-TiO(2) was ca. 4 times higher than P-25 TiO(2). In addition, the photocatalytic activity of Pt-TiO(2) was appeared under visible light. The decrease of TOC as a result of mineralization of diuron was observed during the photocatalytic process. The degree of diuron mineralization was about 97% under UV irradiation after 8h. The formations of chloride, nitrate and ammonium ions as end-products were observed during the photocatalytic system. The decomposition of diuron gave four kinds of intermediate products. The degradation mechanism of diuron was proposed on the base of the evidence of the identified intermediates. Based on these results, the photocatalytic reaction by Pt-TiO(2) could be useful technology for the treatment of wastewater containing diuron.
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Katsumata H, Suzuki K, Tanaka T, Imanaka K. The involvement of cognitive processing in a perceptual-motor process examined with EEG time–frequency analysis. Clin Neurophysiol 2009; 120:484-96. [DOI: 10.1016/j.clinph.2008.11.024] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2008] [Revised: 09/08/2008] [Accepted: 11/23/2008] [Indexed: 11/28/2022]
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56
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Ohba K, Katsumata H, Watanabe M, Suzuki N, Kaneco S, Suzuki T, Ohta K. Source Estimation of PCDD/Fs and Dioxin-Like PCBs in Sediments at Nagoya City. BUNSEKI KAGAKU 2009. [DOI: 10.2116/bunsekikagaku.58.81] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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57
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Katsumata H, Matsumoto T, Kaneco S, Suzuki T, Ohta K. Preconcentration of diazinon using multiwalled carbon nanotubes as solid-phase extraction adsorbents. Microchem J 2008. [DOI: 10.1016/j.microc.2007.10.002] [Citation(s) in RCA: 60] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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58
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Nurul Amin M, Kaneco S, Kato T, Katsumata H, Suzuki T, Ohta K. Removal of thiobencarb in aqueous solution by zero valent iron. CHEMOSPHERE 2008; 70:511-515. [PMID: 17963816 DOI: 10.1016/j.chemosphere.2007.09.017] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/03/2007] [Revised: 09/07/2007] [Accepted: 09/10/2007] [Indexed: 05/25/2023]
Abstract
A cost-effective method with zero valent iron (ZVI) powder was developed for the purification of thiobencarb (TB)-contaminated water. The removal treatment was performed in the batch system. A sample solution of 10 ml containing 10 microg ml(-1) of TB could be almost completely treated by 100mg of ZVI at 25 degrees C for 12h of treatment time. Since the formation of chloride ion in the aqueous solution during the treatment of TB was observed, the removal of TB with ZVI may contain two processes: reduction (degradation) and adsorption. Because the present treatment for TB is simple, easy handling and cheap, the developed technology with ZVI can contribute to the treatment of agricultural wastewaters.
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Dabwan AHA, Imai D, Kaneco S, Senmatsu I, Nakahama K, Katsumata H, Suzuki T, Ohta K. Water purification with sintered porous materials fabricated at 400 degrees C from sea bottom sediments. J Environ Sci (China) 2008; 20:172-176. [PMID: 18574957 DOI: 10.1016/s1001-0742(08)60027-3] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
A sintering technology for preparing porous materials from sea bottom sediments was developed for use in water purification. The purpose of the present study was to develop methods for converting the sea bottom sediments dredged from Ago Bay into value-added recycled products. The sintered products fabricated at 400 degrees C were found to be very effective adsorbents for the removal of heavy metals.
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Katsumata H, Asai H, Kaneco S, Suzuki T, Ohta K. Determination of linuron in water samples by high performance liquid chromatography after preconcentration with octadecyl silanized magnetite. Microchem J 2007. [DOI: 10.1016/j.microc.2006.07.001] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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61
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Amin MN, Kaneco S, Kitagawa T, Begum A, Katsumata H, Suzuki T, Ohta K. Removal of Arsenic in Aqueous Solutions by Adsorption onto Waste Rice Husk. Ind Eng Chem Res 2006. [DOI: 10.1021/ie060344j] [Citation(s) in RCA: 149] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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62
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Katsumata H, Kaneco S, Suzuki T, Ohta K. Determination of atrazine and simazine in water samples by high-performance liquid chromatography after preconcentration with heat-treated diatomaceous earth. Anal Chim Acta 2006; 577:214-9. [PMID: 17723674 DOI: 10.1016/j.aca.2006.06.052] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2006] [Revised: 06/21/2006] [Accepted: 06/21/2006] [Indexed: 11/16/2022]
Abstract
A sensitive and selective column adsorption method is proposed for the preconcentration and determination of atrazine and simazine. Atrazine and simazine were preconcentrated on heat-treated diatomaceous earth as an adsorbent and then determined by high-performance liquid chromatography (HPLC). Several parameters on the recoveries of the analytes were investigated. The experimental results showed that it was possible to obtain quantitative analysis when the solution pH was 2 using 100 mL of validation solution containing 1.5 microg of triazines and 5 mL of ethanol as an eluent. Recoveries of atrazine and simazine were 95.7+/-4.2% and 75.0+/-1.9% with a relative standard deviation for seven determinations of 4.7% and 2.7% under optimum conditions. The maximum preconcentration factor was 100 for triazines when 500 mL of sample solution volume was used. The linear ranges of calibration curves for atrazine and simazine were 1-150 ng mL(-1) and 1-300 ng mL(-1), respectively, with correlation coefficients of 0.999 and the detection limits (3Signal-to-Noise) were 0.24 ng mL(-1) and 0.21 ng mL(-1) for atrazine and simazine. The capacity of the adsorbent was also examined and found to be 0.8 mg g(-1) and 1.3 mg g(-1) for atrazine and simazine, respectively. The proposed method was successfully applied to the determination of triazines in river water and tap water samples with high precision and accuracy.
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63
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Kaneco S, Iiba K, Katsumata H, Suzuki T, Ohta K. Electrochemical reduction of high pressure CO2 at a Cu electrode in cold methanol. Electrochim Acta 2006. [DOI: 10.1016/j.electacta.2006.01.032] [Citation(s) in RCA: 51] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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64
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Katsumata H, Kaneco S, Suzuki T, Ohta K, Yobiko Y. Photo-Fenton degradation of alachlor in the presence of citrate solution. J Photochem Photobiol A Chem 2006. [DOI: 10.1016/j.jphotochem.2005.09.013] [Citation(s) in RCA: 67] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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65
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Kaneco S, Katsumata H, Suzuki T, Ohta K. Electrochemical reduction of carbon dioxide to ethylene at a copper electrode in methanol using potassium hydroxide and rubidium hydroxide supporting electrolytes. Electrochim Acta 2006. [DOI: 10.1016/j.electacta.2005.09.025] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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66
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Katsumata H, Kaneco S, Suzuki T, Ohta K, Yobiko Y. Degradation of polychlorinated dibenzo-p-dioxins in aqueous solution by Fe(II)/H2O2/UV system. CHEMOSPHERE 2006; 63:592-9. [PMID: 16213552 DOI: 10.1016/j.chemosphere.2005.08.015] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/15/2005] [Revised: 08/04/2005] [Accepted: 08/12/2005] [Indexed: 05/04/2023]
Abstract
The photodegradation of polychlorinated dibenzo-p-dioxins (PCDDs), which include tetra- to octa-CDDs (TeCDD, PeCDD, HxCDD, HpCDD and OCDD), was carried out in the presence of Fe(II) and H2O2 mixed reagent. The degradation efficiency was strongly influenced by UV irradiation, and the initial concentrations of H2O2 and Fe(II). An initial TeCDD concentration of 10 ng l(-1) was completely degraded within 20 min under the optimum conditions. All PCDDs tested were successfully degraded by Fe(II)/H2O2/UV treatment and complete degradation of TeCDD, PeCDD and HxCDD was achieved within 120 min. PCDD photodegradation rates decreased with the number of chlorine atoms. The degradation process of TeCDD by this system seems to be initiated by an oxidative reaction (OH* radical attack) because less chlorinated DDs as intermediate products were not detected. From the Frontier electron density calculation, the first OH* radical attack positions on TeCDD were found to be four C atoms neighboring two O atoms. The decomposition of TeCDD gave 4,5-dichlorocatechol as an intermediate product. A TeCDD degradation scheme was proposed based on the identified intermediate and the values of Frontier electron density. Based on these results, Fe(II)/H2O2/UV system could be useful technology for the treatment of wastewater containing persistent pollutants such as dioxins and polychlorinated biphenyls.
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Katsumata H, Kato Y, Fujisawa T. House Dust Mite Extract Induces Interleukin-9 Expression in Human Eosinophils. J Allergy Clin Immunol 2006. [DOI: 10.1016/j.jaci.2005.12.244] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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68
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Rahman MA, Kaneco S, Suzuki T, Katsumata H, Ohta K. Optimized conditions for the solar photocatalytic degradation of bisphenol A in water using zinc oxide. ANNALI DI CHIMICA 2005; 95:715-9. [PMID: 16342744 DOI: 10.1002/adic.200590083] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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69
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Rahman MA, Kaneco S, Suzuki T, Katsumata H, Ohta K. Slurry Sampling Techniques for the Determination of Lead in Bangladeshi Fish Samples by Electrothermal Atomic Absorption Spectrometry with a Metal Tube Atomizer. ACTA ACUST UNITED AC 2005; 95:325-33. [PMID: 16477940 DOI: 10.1002/adic.200590037] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
Ultrasonic slurry sampling electrothermal atomic absorption spectrometry with a metal tube atomizer has been applied to the determination of lead in Bangladeshi fish samples. The slurry sampling conditions, such as slurry stabilizing agent, slurry concentration, pyrolysis temperature for the slurried fish samples, particle size and ultrasonic agitation time, were optimized for electrothermal atomic absorption spectrometry with the Mo tube atomizer. Thiourea was used as the chemical modifier for the interference of matrix elements. The detection limit was 53 fg (3S/N). The determined amount of lead in Bangladeshi fish samples was consistent with those measured in the dissolved acid-digested samples. The advantages of the proposed methods are easy calibration, simplicity, low cost and rapid analysis.
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70
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Nagao M, Fujisawa T, Kato Y, Noma Y, Katsumata H, Nishimori H, Atsuta J, Iguchi K, Ogawauchi I, Tanaka H, Higashiura M, Kamiya H. Clinical utility of serum TARC/CCL17 levels in children with atopic dermatitis. J Allergy Clin Immunol 2005. [DOI: 10.1016/j.jaci.2004.12.1097] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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71
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Noma Y, Fujisawa T, Katsumata H, Nagao M, Atsuta J, Iguchi K, Kamiya H. Changing outcome of childhood asthma with increased use of inhaled corticosteroids. J Allergy Clin Immunol 2005. [DOI: 10.1016/j.jaci.2004.12.056] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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72
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Katsumata H, Fujii A, Kaneco S, Suzuki T, Ohta K. Determination of simazine in water samples by HPLC after preconcentration with diatomaceous earth. Talanta 2005; 65:129-34. [PMID: 18969774 DOI: 10.1016/j.talanta.2004.05.045] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2004] [Revised: 05/08/2004] [Accepted: 05/20/2004] [Indexed: 11/24/2022]
Abstract
A sensitive and selective batch adsorption method is proposed for the preconcentration and determination of simazine. Simazine was preconcentrated on diatomaceous earth as an adsorbent and then determined by high-performance liquid chromatography (HPLC). Several parameters on the recovery of the analyte were investigated. The experimental results showed that it was possible to obtain quantitative analysis when the solution pH was 2 using 100mL of validation solution containing 1.5mug of simazine and 5mL of ethanol as an eluent. Recovery of simazine was 89.0 +/- 1.6% with a relative standard deviation for seven determinations of 1.5% under optimum conditions. The maximum preconcentration factor was 100 for simazine when 500mL of sample solution volume was used. The linear range of calibration curve was 1-200ngmL(-1) with a correlation coefficient of 0.996 and the detection limit (3S/N) was 0.3ngmL(-1). The capacity of the adsorbent was also examined and found to be 1.1mgg(-1) for simazine. The proposed method was successfully applied to the determination of simazine in river water with high precision and accuracy.
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73
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Rahman MA, Ahsan S, Kaneco S, Katsumata H, Suzuki T, Ohta K. Wastewater treatment with multilayer media of waste and natural indigenous materials. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2005; 74:107-110. [PMID: 15627464 DOI: 10.1016/j.jenvman.2004.08.012] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/14/2003] [Revised: 06/01/2004] [Accepted: 08/26/2004] [Indexed: 05/24/2023]
Abstract
Wastewater treatment using waste materials (refuse concrete, waste paper and charcoal) and natural indigenous rocks (andesite, limestone, granite and nitrolite) in the form of multilayer media was investigated. The removal of suspended solids (SS), phosphate ion, nitrate ion, ammonium ion, toxic metals and chemical oxygen demand (COD) were evaluated for the multilayer wastewater treatment system. Effective removal of heavy metals such as cadmium, chromium, mercury and lead was demonstrated. SS and phosphate ion were removed with relatively high efficiency and the COD after treatment was lessened using certain combinations of media. The present wastewater treatment system is simple, convenient and low cost. Therefore, this method can be applied in small scale plants for wastewater treatment in local and nonexclusive areas.
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Katsumata H, Kaneco S, Suzuki T, Ohta K. Long-Term Sampling Method for PCDD/Fs in Atmosphere by Adsorption onto Economical Materials. CHEM LETT 2004. [DOI: 10.1246/cl.2004.1618] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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75
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Rahman MA, Kaneco S, Suzuki T, Katsumata H, Ohta K. Separation of zinc compounds by sequential metal vapor elution analysis with atomic absorption detection. Talanta 2004; 64:989-92. [DOI: 10.1016/j.talanta.2004.04.017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2004] [Revised: 04/21/2004] [Accepted: 04/21/2004] [Indexed: 10/26/2022]
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