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Home > Sonophotocatalytic Degradation of Organic Pollutants in Aqueous Solutions under Visible Light Using Metal Impregnated Photocatalysts

Sonophotocatalytic Degradation of Organic Pollutants in Aqueous Solutions under Visible Light Using Metal Impregnated Photocatalysts

Thesis Info

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Author

Khitab, Fatima

Program

PhD

Institute

University of Peshawar

City

Peshawar

Province

KPK

Country

Pakistan

Thesis Completing Year

2020

Thesis Completion Status

Completed

Subject

Chemistry

Language

English

Link

http://prr.hec.gov.pk/jspui/bitstream/123456789/12219/1/Fatima%20Khitab%20chemistry%202020%20uni%20of%20peshwar%20prr.pdf

Added

2021-02-17 19:49:13

Modified

2024-03-24 20:25:49

ARI ID

1676727211583

Similar


The visible light induced semiconductor photocatalyst Ni impregnated ZnO was prepared by wet impregnation method. Impregnation of Ni on ZnO shifts the band gap from UV to Visible region. The present study involves the sonophotocatalytic degradation of acid violet 49 and acid blue 45 in the presence of photocatalyst Ni-ZnO under the irradiation of visible light. Degradation efficiency of sonophotocatalysis was higher than sonolysis, sonocatalysis, photolysis and photocatalysis. Photocatalyst was characterized by scanning electron microscopy (SEM), energy dispersive X-ray analysis (EDX) and X-ray diffraction (XRD). Effect of different operational parameters such as pH, catalyst dosage, different oxidising agents, initial dye concentration, different scavengers, catalyst re-used ability, catalyst settling time and catalytic poisoning. Addition of enhancers increases the degradation efficiency and scavengers decrease the degradation. We found that Acid violet 49 and acid blue 45 degraded 100% at pH 10 in 20 minutes. Catalyst re-usability was checked up to five cycle and it gives a fruitful results. Kinetics study was also carried out and it was found that both of the dyes undergo pseudo first order kinetic model. All the experiments indicate that the sonophotocatalytic degradation method in the presence of Ni-ZnO was an advisable choice for the treatment of textile effluents.
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حمیدؔ صدیقی[زائر حرم]

حمید صدیقی
افسوس ہے کہ گذشتہ مہینے زائر حرم حمید صدیقی نے وفات پائی، وہ اس دور کے بہترین نعت گو تھے ان کی نعتیں محض شاعرانہ صناعی نہیں بلکہ سچے جذبات اور دلی کیفیات کی ترجمان ہیں، وہ جیسی پاکیزہ نعتیں کہتے ویسے ہی ترنم سے پڑھتے بھی تھے، ان کی نعتیں صاحب نعتؐ کی بارگاہ میں اتنی مقبول تھیں کہ ان کو دس بارہ مرتبہ آستان نبوی کی حاضری سعادت حاصل ہوئی طبعاً بھی بڑے مہذب اور شریف تھے، ادھر عرصہ سے ان کی صحت خراب رہتی ایک دن معلوم ہوا کہ ریاض نبوی کا زمزمہ سنج باغ رضوان میں پہنچ گیا، اﷲ تعالیٰ مدحِ نبویؐ کے طفیل میں ان کی مغفرت فرمائے۔
(شاہ معین الدین ندوی، مارچ ۱۹۶۵ء)

سنت ترکیہ کی شرعی حیثیت: ایک تحقیقی مطالعہ

Sunnat-e- Tarkia is a specific term. It refers to the deeds of Prophet Muhammad ﷺ which he willingly gave up due to certain aims of Shariah. According to Islamic Shariah, in the chapter of worship, Sunnat-e-Tarkia is as significant and compulsory worship as the other deeds and commands of Prophet Muhammadﷺ. It is not possible to follow commands and prohibitions of Muhammad ﷺ until we understand Sunnat-e-Tarkia and Sunnat-e- Fa'ilia. So, both of these are required in Islamic Shariah, none of these can be ignored. So it is necessary to elaborate the legal value of Sunnate-Tarkia in Islam.

اصول فقہ میں مسلک -فقہیہ کے مشترکات تقابلی جائزہ ادلہ جتہاد ک تناظر میں .

The purpose of this study is to investigate how different Islamic schools of thought interpret and derive basic principles in Islamic jurisprudence. It is believed that the Muslims set the principles of Islamic jurisprudence soon after the demise of the Prophet (s.a.w.w) of Islam. This branch of knowledge is actually a superb fusion of reasoning and imitation. It is the study of the arguments through which Islamic Sharia is interpreted and Islamic legislation is achieved. Most often, the debates involve doctrinal arguments, and all the existing Islamic schools of thought agree on the basic principles through which certain laws are derived from those debates. All the Islamic schools of thought agree that Qur’an is the final authority, and it is the Qur’an that provides the initial argument whenever some issue arises. Thus the Qur’an is the first and foremost source to provide an answer to any issue. However, the Hambli scholars ascribe authority to the Qura’an and the Sunnah, without making a clear distinction in order or rank between the two. The Sunnah is the second source for deriving doctrinal principles. All Islamic schools of thought agree that the Sunnah is an important and basic source for deriving the Sharia principles. The Sharia can be divided into two kinds: the first deals with the steady and gradual reporting which, according to every school of thought, adds to argumentative knowledge, and hence stands for authority in Islamic jurisprudence. The second kind involves personal reporting which depends on personal character for determining its truth-value. However, every school of thought takes it as authority once its truth-value is verified. For Hanfi school of thought, certain other conditions besides personal character are required in order to accept the personal reporting. The third most important source for deriving principles in Islamic jurisprudence is the community consensus. Every school of thought accepts the authority of the general consensus. Although most of the schools of thought agree on the authority of absolute consensus, the Malkis also take community consensus as an authority, i.e., if the community in Madina arrive at a consensus on some issue, it would be accepted as the authority. On the other hand, according to the Ja’fri school of thought, every consensus has attained authority with a ma’soom’s opinion in its favor. For the majority Ummah, reasoning is also regarded as authority for the derivation of the Sharia principles. According to Imam Ibne Hazam, logical reasoning is possible, but it is not recognized by the Sharia. On the other hand, the Ja’fri school of thought accepts the authority of both the mansoosul-illat reasoning and the awaliyat reasoning. As for the authority of istashab, all the Muslim states accept and set it as a precedence to implement the state laws. The Hanfis believe that only an accepted right can be explored and verified through istashab, and not a new one. All these are the basic principles that serve as authority in the Islamic jurisprudence. Every Islamic school of thought employs them for the interpretation and implementation of the Sharia.