Sonochemical Degradation of Pharmaceutical Wastewater     

Ramalingam Sivakumar  Karuppan Muthukumar 《洁净——土壤、空气、水》2011,39(2):136-141

This study presents the influence of the addition of additives such as activated carbon, carbon tetra chloride, hydrogen peroxide, and potassium dichromate on ultrasonic reduction of pharmaceutical wastewater chemical oxygen demand (COD) under laboratory conditions. The addition of activated carbon increased the % COD reduction whereas the combined addition of activated carbon and H₂O₂/CCl₄/K₂Cr₂O₇ was found to show higher reduction. Among the various combinations investigated, the combined addition of activated carbon and CCl₄ was found to be the best combination. However, the environmental and health problems associated with these chemicals limit the applicability of the process in an industrial level. Further investigation with this system showed that the initial pH and initial COD have significant influence on the removal rate. The data obtained were fitted with first order and Langmuir–Hinshelwood kinetic models. The values of the rate constants obtained indicated that the pharmaceutical wastewater can be treated efficiently by the proposed methods.  相似文献   

Studies on Dye Decolorization by Ultrasound Assisted Electrocoagulation          下载免费PDF全文

Mujyambere Jean Marie Vianney  Karuppan Muthukumar 《洁净——土壤、空气、水》2016,44(3):232-238

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Sonophotocatalysis of endocrine-disrupting chemicals     

Tokumoto T  Ishikawa K  Furusawa T  Ii S  Hachisuka K  Tokumoto M  Tsai HJ  Uchida S  Maezawa A 《Marine environmental research》2008,66(3):372-377

Sonolysis and photolysis often exhibit synergistic effects in the degradation of organic molecules. An assay of fish oocyte maturation provides an appropriate experimental system to investigate the hormonal activities of chemical agents. Oocyte maturation in fish is triggered by maturation-inducing hormone (MIH), which acts on receptors on the oocyte surface. A synthetic estrogen, diethylstilbestrol (DES), possesses inducing activity of fish oocyte maturation, and a widely used biocide, pentachlorophenol (PCP), exhibits a potent inhibitory effect on fish oocyte maturation. In this study, the effects of the combined treatment by sonolysis with photolysis (sonophotocatalysis) to diminish the hormonal activity of DES and the maturation preventing activity of PCP was examined. By sonophotocatalysis, hormonal activity of DES was completely lost within 30min and the inhibiting activity of PCP was lost within 120min. These results demonstrated that sonophotocatalysis is effective for diminishing the endocrine-disrupting activity of chemical agents.  相似文献