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Article
Purification of aqueous solutions malachite green by using cardamom seeds shells

Author: Ali K. Al-Muttarri
Journal: Mesopotamia Environmental Journal بيئة وادي الرافدين ISSN: 24102598 Year: 2017 Volume: 3 Issue: 4 Pages: 1-5
Publisher: Babylon University جامعة بابل

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Abstract

This study was conducted to find a new and cheap method to remove the malachite green dye from the aqueous solutions, the effects of four main factors on the adsorption process was studied, results show that the best contact time for adsorbing the malachite green dye was 150 min. which give removal efficiency more than R% = 76, we found that the increase in the initial dye concentration lead to the increase in R%, the highest R% reached was 79.8 at initial dye concentration 100 mg/L, the results also show that the R% was increased with the increase in the Adsorbent weight , the highest R% recorded was 82.7 when adding 2 gm of cardamom seed shells, the final factor studied was pH value the R% was increased with the increase of pH value from acidity to alkali media , the highest R% was 84.35 at pH=7.


Article
Photocatalytic Degradation of Malachite Green Dye Over Naked Niobium Oxide as a Photocatalyst

Authors: Alaa Salman Hussein --- Nada Yehya Fairooz
Journal: Journal of University of Babylon مجلة جامعة بابل ISSN: 19920652 23128135 Year: 2016 Volume: 24 Issue: 9 Pages: 2510-2518
Publisher: Babylon University جامعة بابل

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Abstract

This study is one application of Advanced Oxidation Process (AOPs) that is using Naked Niobium Oxide (Nb2O5) as a photocatalyst to degrade the industrial Malachite Green dye. Malachite Green is used in many industries such as leather, silk, paper, plastic and others. This research involved Study different factors of photodegradation [weight of catalyst (0.03 – 0.3) g, initial concentration of dye (5 – 15) ppm, temperature (5 – 25) ℃, light intensity (2.3 – 3.5) mW / cm2, pH (2 – 8), adding of hydrogen peroxide (0.5 – 2) mL and type of gas (air, N2)].

تعتبر هذه الدراسة أحد تطبيقات عمليات الأكسدة المتقدمة (AOPs) باستخدام العامل المساعد المجرد أوكسيد النيوبيوم (Nb2O5) كعامل مساعد ضوئي لتكسير صبغة المالاخايت الأخضر.تستخدم صبغة المالاخايت الأخضر في عدة صناعات منها صناعة الجلود، الحرير، الورق، البلاستيك بالإضافة الى صناعات أخرى. تضمن البحث دراسة تأثير الظروف المختلفة على عملية التكسير الضوئي [تأثير وزن العامل الساعد (0.03 – 0.3) غم، التركيز الابتدائي للصبغة (5 – 15) جزء بالمليون، درجة الحرارة (5 – 25) درجة سيليزية، شدة الضوء المستخدم (2.3 – 3.5) ملي واط/سم2، الدالة الحامضية (2–8)، إضافة بيروكسيد الهيدروجين (0.5 – 2.0) مليلتر ونوع الغاز المستخدم (هواء، غاز النتروجين)].

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