Treatment of water contaminated with dimethyl phthalate by Fenton, Photo-Fenton and UV/H₂O₂ processes

الموضوعات

علوم تطبيقية وتكنولوجية

الملخص

This study showed that the application of hydrogen peroxide (H₂O₂) alone was not sufficient to oxidize Dimethyl phthalate (DMP) in water. Fenton process was found to be effective in removing DMP from pure water and seemed to follow a pseudo-first order reaction, however, it did not show any removal of DMP when the water was spiked with appreciable amount of methanol. The results indicated that increasing the concentration of Fe²⁺ caused an increase in the removal od DMP from pure water by Fenton process, while, increasing the initial concentration of H₂O₂, did not always lead to improving the efficiency of the Fenton process. A high temperature and a pH value of 3 to 4 were found to be best for achieving an efficient removal of DMP from pure water. The study also showed that DMP could be partially degraded by direct photolysis (i.e. UV light only), and that a great enhancement of the removal efficiency was achieved when the action of UV light was combined with the action of Fenton's reagent (i.e. photo-Fenton). On the other hand, the UV/H₂O₂ process was found to be effective in removing DMP from the pure and methanol-spiked water and the DMP removal seemed to be a pseudo first-order reaction. Similar to Fenton, the high temperature and low pH resulted in enhancing the removal efficiency of DMP by the UV/H₂O₂ process. Lower removal rate of DMP was observed when the initial concentration of DMP (i.e. DMPi) was increased. It was concluded that an optimum molar ratio between DMP, H₂O₂ and Fe²⁺ must be determined in order to obtain the best removal efficiency. The efficiency of Fenton process dropped down drastically when DMP was spiked into local groundwater rather than pure water. However, the efficiency of UV/H₂O₂ dropped only slightly under the same conditions. Due to its many advantages, UV/H₂O₂ process was selected in this study to be the suitable oxidation process for the removal of DMP from water. The optimum conditions required to reach a considerable treatment efficiency of more than 97% of the 0.1 mM DMP at neutral pH value, were: H₂O₂ of 2.0 mM; UV exposure time of 30.6 minutes; and temperature of 33.6 C.

روابط وملفات

التعريف والنوع

رقم الوثيقة

025d72bb-dda1-4a6d-bda8-8b06f851cb5a

رقم العقد

0

نوع الوسائط

Crawler

نوع المحتوى

الرسائل العلمية

صيغة المصدر

رسائل دكتوراة

نوع الملف

pdf text

أسماء الملفات

945520_1.pdf

بيانات النشر

ترجمة العنوان

معالجة مياه ملوثة بمادة الدايميثايل فثاليت بطرق الفنتون، الفوتو، والأشعة الفوق بنفسجية مع مركب بروكسيد الهيدروجين المؤكسد

ألقاب المؤلفين

[{"name_ar":"بسام شفيق أحمد الطوابيني","title_ar":"اعداد","title_en":"Preparation"},{"name_ar":"رشيد العيالي","title_ar":"اشراف","title_en":"Supervision"},{"name_ar":"محمد الصوايان","title_ar":"اشراف","title_en":"Supervision"}]

اللغة

English

المصدر والدورية

اسم المصدر

Treatment of water contaminated with dimethyl phthalate by Fenton, Photo-Fenton and UV/H₂O₂ processes

المحتوى والصفحات

عدد الصفحات

0

إشراف وإعداد

الإشراف

رشيد العيالي, محمد الصوايان

الإعداد

بسام شفيق أحمد الطوابيني

الاقتباسات الببليوغرافية