حذف کاتالیتیک اشیرشیا کلی از محلول های آبی با استفاده از نانو ذرات اکسید روی، یک مطالعه کینتیک

علیخانی, محمد یوسف and لی, سئونگ موک and یانگ, جای کیو and شیرزاد سیبنی, مهدی and پیری دوگاهه, هادی and سیدین خراسانی, مسعود and نوشک, محمد علی and سمرقندی, محمدرضا (1391) حذف کاتالیتیک اشیرشیا کلی از محلول های آبی با استفاده از نانو ذرات اکسید روی، یک مطالعه کینتیک. Water Science & Technology ــ 67 (3). pp. 557-563. شاپا 0273-1223

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Photocatalytic removal of Escherichia coli from aquatic solutions using synthesized ZnO nanoparticles: a kinetic study

English Abstract

Development of effective and low-cost disinfection technology is needed to address the problems caused by an outbreak of harmful microorganisms. In this work, an effective photocatalytic removal of Gram-negative bacteria Escherichia coli from aqueous solution was reported by using ZnO nanoparticles under UV light irradiation. The effect of various parameters such as solution pH, ZnO dosage, contact time and initial E. coli concentration were investigated. Maximum photocatalytic disinfection was observed at neutral pH because of the reduced photocatalytic activity of ZnO at low and high pH values originated from either acidic/photochemical corrosion of the catalyst and/or surface passivation with Zn(OH)2. As the ZnO dosage increased, the photocatalytic disappearance of E. coli was continuously enhanced, but was gradually decreased above 2 g/L of ZnO due to the increased blockage of the incident UV light used. The optimum ZnO dosage was determined as 1 g/L. Photocatalytic removal of E. coli decreased as initial E. coli concentration increased. Three kinetic models (zero-, first- and second-order equations) were used to correlate the experimental data and to determine the kinetic parameters.

Item Type:Article
زبان سند : انگلیسی
نویسنده اول :محمد یوسف علیخانی
نویسنده مسئول :مهدی شیرزاد سیبنی
نویسنده :هادی پیری دوگاهه
Additional Information:Indexed/Abstracted in: Aqua. Abstr., Biosis Data., CAB Inter., Cam. Sci. Abstr., Chem. Abstr., Curr. Cont/ Agri. Bio Env. Sci., CABS, Eng. Ind., Environ. Per. Bibl. and Geo Abstr. and Res. Alert, Elsevier Biobase, Engineering Information Inc
کلیدواژه ها (انگلیسی):disinfection, Escherichia coli, photocatalysis, synthesis, ZnO
Subjects:QW Microbiology and Immunology
WA Public Health
WA Public Health
Divisions:Faculty of Medicine > Department of Basic Sciences > Department of Microbiology
ID Code:3945
Deposited By: Dr Hadi Peeridogaheh
Deposited On:12 Nov 1391 07:46
Last Modified:10 Apr 1398 09:49

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