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کاربرد نوع شرط:
- جایگاه : پژوهشی
- مجله: Iranian Journal of Chemistry and Chemical Engineering
- نوع مقاله: Journal Article
- کلمات کلیدی: Decolorization,Ligninolytic enzymes,Kissiris-immobilized Phanerochaete chrysosporium,Maxilon-red synthetic dye,Trickle-bed bioreactor
- چکیده:
- چکیده انگلیسی: The decolorization of Maxilon-red dye by Kissiris immobilized Phanerochaete chrysosporium in the trickle-bed reactor (TBR) using the basal nitrogen-limited growth medium was studied. The influence of the superficial liquid velocity (SLV) on the decolorizing ability of the fungus was examined at four SLVs (cm sec-1): 0.05, 0.075, 0.1, and 0.15. Maximum level of the decolorizing activity was about 94 % by day 4-5 of the process when the TBR operated at SLV=0.075 to 0.1 cm sec-1. At these SLVs, the maximum activities of the lignin peroxidase (LiP) and the manganese peroxidase (MnP) were (UL-1): 87 and 207, respectively. In a successive decolorization of the tested dye in a continuous dye addition in the TBR when glucose level decreased to 2 gL-1, significant reduction in the characteristics of the interest were observed. While by controlling the glucose concentration, these properties were improved considerably: The decolorizing ability of the Kissiris immobilized mycelia was more than 85 % after nearly 20 days of the process while the maximum activities of the LiP and the MnP were (UL-1): 320 and 151, respectively. Considerable levels of the enzyme activities were detected by day 19 and after 11 times of the dye additions.
- انتشار مقاله: 01-08-1386
- نویسندگان: Afzal Karimi,Farzaneh Vahabzadeh,Majid Mohseni,Mehrnaz Mehranian
- مشاهده
- جایگاه : پژوهشی
- مجله: Iranian Journal of Chemistry and Chemical Engineering
- نوع مقاله: Journal Article
- کلمات کلیدی: Decolorization,Ligninolytic enzymes,Kissiris-immobilized Phanerochaete chrysosporium,Maxilon-red synthetic dye,Trickle-bed bioreactor
- چکیده:
- چکیده انگلیسی: The decolorization of Maxilon-red dye by Kissiris immobilized Phanerochaete chrysosporium in the trickle-bed reactor (TBR) using the basal nitrogen-limited growth medium was studied. The influence of the superficial liquid velocity (SLV) on the decolorizing ability of the fungus was examined at four SLVs (cm sec-1): 0.05, 0.075, 0.1, and 0.15. Maximum level of the decolorizing activity was about 94 % by day 4-5 of the process when the TBR operated at SLV=0.075 to 0.1 cm sec-1. At these SLVs, the maximum activities of the lignin peroxidase (LiP) and the manganese peroxidase (MnP) were (UL-1): 87 and 207, respectively. In a successive decolorization of the tested dye in a continuous dye addition in the TBR when glucose level decreased to 2 gL-1, significant reduction in the characteristics of the interest were observed. While by controlling the glucose concentration, these properties were improved considerably: The decolorizing ability of the Kissiris immobilized mycelia was more than 85 % after nearly 20 days of the process while the maximum activities of the LiP and the MnP were (UL-1): 320 and 151, respectively. Considerable levels of the enzyme activities were detected by day 19 and after 11 times of the dye additions.
- انتشار مقاله: 01-08-1386
- نویسندگان: Afzal Karimi,Farzaneh Vahabzadeh,Majid Mohseni,Mehrnaz Mehranian
- مشاهده
- جایگاه : پژوهشی
- مجله: Advances in Environmental Technology
- نوع مقاله: Journal Article
- کلمات کلیدی: Decolorization,Glucose oxidase,Kissiris,Heterogeneous Bio-Fenton
- چکیده:
- چکیده انگلیسی: Titanium dioxide (TiO2) and Fe3O4 magnetite particles were coated on spherical Kissirises; glucose oxidase (GOx) enzyme was immobilized on Kissiris/Fe3O4/TiO2 by physical adsorption. This catalyst was analyzed by a scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR), and energy dispersive X-ray (EDX) measurements. The performance of the prepared biocatalyst in the decolorization of Malachite Green dye was investigated. The optimal operation parameters were 20 mg/L, 20 mM, 5.5 and 40 ̊C for initial dye concentration, initial glucose concentration, pH and temperature, respectively. Under these conditions, a 95% Malachite Green decolorization efficiency was obtained after 150 min of reaction by using 1 g of prepared heterogeneous bio-Fenton catalyst. In this process, in contrast to a conventional Fenton’s reaction, external hydrogen peroxide and ferrous ion sources were not used. The effect of various reaction parameters such as initial concentration of dye, amount of catalyst, concentration of glucose, pH value and temperature on MG decolorization efficiency was studied.
- انتشار مقاله: 23-03-1394
- نویسندگان: Vahide Elhami,Afzal Karimi
- مشاهده