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Analytical and Bioanalytical Chemistry Research، جلد ۳، شماره ۱، صفحات ۱۳۹-۱۴۷
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عنوان انگلیسی Quantification of Radicals Generated in a Sonicator
چکیده انگلیسی مقاله The hydroxyl radical (OH•) is a powerful oxidant produced as a consequence of cavitation in water. It can react nonspecifically in breaking down persistent organic pollutants in water into their mineral form. It can also recombine to form hydrogen peroxide which is very useful in water treatment. In this study, terephthalic acid (TA) and potassium iodide dosimetry were used to quantify and investigate the behaviour of the generated OH radical in a laboratory scale sonicator. The 2-hydroxyl terephthalic acid (HTA) formed during terephthalic acid dosimetry was determined by optical fibre spectrometer. The production rate of HTA served as a means of evaluating and characterizing the OH• generated over given time in a sonicator. The influence of sonicator power intensity, solution pH and irradiation time upon OH• generation were investigated. Approximately 2.2 ´ 10-9 M s-1 of OH radical was generated during the sonication process. The rate of generation of the OH radicals was established to be independent of the concentration of the initial reactant. Thus, the rate of generation of OH• can be predicted by zero order kinetics in a sonicator.
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نویسندگان مقاله kassim badmus |
environmental and nano science research, chemistry department, university of the western cape, cape town, south africa

jimoh تیجانی |
environmental and nano science research, chemistry department, university of the western cape, cape town, south africa

chuks پاوول eze | chuks paul
chemistry department cape peninsula university of technology

ojo fatoba |
environmental and nano science research, chemistry department, university of the western cape, cape town, south africa

leslie f petrik | leslie f
environmental and nano science research, chemistry department, university of the western cape, cape town, south africa

نشانی اینترنتی http://www.analchemres.org/article_15086_dc9796928d98e4c4d48a3017b58b84f2.pdf
فایل مقاله اشکال در دسترسی به فایل - ./files/site1/rds_journals/378/article-378-332577.pdf
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زبان مقاله منتشر شده en
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