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العنوان
Treatment of industrial wastewater by advanced oxidation processes /
المؤلف
Azab, Mahmoud Samy Abd El-Ghafar.
هيئة الاعداد
باحث / محمود سامى عبدالغفار عذب
مشرف / هشام خليل الاتريبى
مشرف / محمد أحمد عبدالحكيم
مناقش / هدى فخرى الجمال
الموضوع
Sewage - Purification. Water - Purification - Oxidation. Water - Dissolved oxygen. Sustainable engineering. Oxidation. Factory and trade waste.
تاريخ النشر
2018.
عدد الصفحات
160 p. :
اللغة
الإنجليزية
الدرجة
ماجستير
التخصص
الهندسة (متفرقات)
تاريخ الإجازة
01/04/2018
مكان الإجازة
جامعة المنصورة - كلية الهندسة - Public Works Engineering
الفهرس
Only 14 pages are availabe for public view

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from 160

Abstract

Industrial wastewater are produced daily in large quantities from different industries. Dyes are abundant class of colored organic compounds which are widely used in many industrial processes such as leather, textile and printingindustries. Discharging industrial wastewater contains those dyes without any treatment has many bad impacts on the environment. Dyes are one of the most environmental concerns because of their known carcinogenic properties. Pesticides industry produces wastewater that contains many hazardous pollutants. Wastewater contains pesticides causes several problems. Various chemical and physical treatment processes have been developed for dyes and pesticides removal including air stripping, flocculation, precipitation, adsorption, ultrafiltration and reverse osmosis. These processes are not cost effective since they transfer the pollutants into sludge, which requires further treatment. Therefore, it is necessary to develop the technologies that can achieve full mineralization of organic pollutants without producing sludge. Advanced oxidation processes are one of the best solutions for the removal of dyes and many other complex organic from industrial wastewater. Different types of advanced oxidation processes such as (Fe2+/H2O2, Fe2+/H2O2/UV and Fe3+/H2O2/UV, O3/UV, O3/H2O2 and UV/ H2O2) have been applied for wastewater treatment. Semiconductor photocatalysis is a destructive technology resulting in complete mineralization of most organic pollutants. The main objective of this study is to evaluate photocatalysis in the removal of dyes such as methylene blue (MB) and pesticides such as chlorpyrifos using synthesized nano titanium. The effect of various operational conditions such as ( initial concentration of pollutant, catalyst dose, illumination time, and pH) on the photocatalysis performance were investigated. Full characterization of the synthesized nano titanium was carried out. The results showed that the photodegradation of substrate was strongly influenced by operational parameters. Increasing the initial feed concentration of pollutant decreases the photocatalytic degradation efficiency. The photocatalytic degradation efficiency of MB and chlorpyrifos increased with increasing the illumination time. It was found that the more the catalyst dose, the higher the MB and chlorpyrifos removal efficiency. The highest MB photocatalytic degradation was achieved in alkaline media. The highest chlorpyrifosphotocatalytic degradation was achieved in neutral media. The data of MB and chlorpyrifos was successfully analyzed with the Langmuir –Hinshelwood pseudo first order kinetic model. MB and chlorpyrifos were successfully degraded by using the synthesized nano TiO2 in light with intensity of 122K Lux. The synthesized TiO2 band gap falls in the visible light region which demonstrates the activation of TiO2 in visible light. A mathematical model was performed for MB and chlorpyrifos to express the relation between removal efficiency and operational conditions with regression coefficients of 85.7% and 88.45%, respectively.