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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

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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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المبحث الخامس: بدايةالنظم عند نازك الملائكة

المبحث الخامس: بدايةالنظم عند نازك الملائكة
نظمت الشاعرۃ العراقیۃ نازک الملائکۃ قصیدتھا الأولی ’’الکولیرا‘‘ في عام 1947م وکان عمرھا آنذاک اثنین وعشرین عاماً، وكذا بدأت حرکۃ الشعر الحرعام 1947م، في العراق وزحفت ھذہ الحرکۃ حتی عمت وأحاطت بالوطن العربي کلہ . تقول رائدۃ الشعر الحر في قضایا الشعر المعاصر: ’’وکانت أول قصیدۃ حرۃ الوزن تنتشر قصیدتي المعنونۃ الکولیرا‘‘وھي من الوزرن المتدارک(الجنب) ۔
کانت نازک الملائکۃ شاعرۃ رائعۃ وحساسۃ جداً، صورت مشاعرھا وعبرت عن حزنھا بتعبیر صادق، وتکلّمت عن إخوانھا المرضی بداء ’’الکولیرا‘‘ في مصر، فکان ذلک سبباً في اکتشاف أسلوب جدید في الشعر الحدیث وھو ’’ الشعر الحر‘‘۔
في مطولتھا الشعریۃ ’’مأساۃ الحیاۃ‘‘ أخذت الشاعرۃ تبحث عن السعادۃ متسائلۃ إن کان لھا الوجود في ھذہ الدنیا الفانیۃ، فبحثت أولاً لدیٰ الأغنیاء لعل السعادۃ في قصورھم وحیاتھم المترفۃ الناعمۃ، ولکنھا وجدت الغني بأن لیس لہ القدرۃ علی أن یدفع وحشۃ القبر والأکفان بأحوالہ وثروتہ، ثم انتقلت إلی الرھبان والزاھدین فوجدت آثار الحرمان من اللّذات واضحۃ علی وجوھھم، ثم انتقلت إلی اللصوص والمجرمین فوجدت لدیھم القلق وعذاب الضمیر ولیس لدیهم راحۃ البال. فاتجھت نحو الریف، وھناك أیضاً لم تجد السعادۃ بل وجدت البؤس والفقر والعذاب، ووصفت حال الفلاحین في المناطق الباردۃ التي فیھا الثلوج وکیف ینتشر الجوع وتموت المواشي، ثم انتقلت من الریف إلی الشعر والشعراء، ولا نجد السعادۃ لدیھم، فاتجھت الی العشاق والمحبین لعلھم ذاقوا السعادۃ ولکن للأسف لا تجد فیھم السعادۃ وذلک لأن الشھوۃ الجنسیۃ تفوق الفکر العقلي والحب الشریف وتعاند طھارۃ الروح الإنساني، فانتھت رحلۃ الشاعرۃ بالخیبۃ حيث لم تجد لدیھم السعادۃ۔
وتطور أسلوب شعرھا في عام 1950 فأصبحت مواردھا الأدبیۃ أغزر ولم تکن راضیۃ عن (مأساۃ الحیاۃ) فقررت أن تعید نظمھا بصورۃ أجمل وبأسلوب جدید، فتطور ألفاظھا يختلف عن الألفاظ السابقۃ وأخذت تعدل ھذہ المطولۃ وتضع شطراً ھنا وھناک وبدأت التغیرات تطرأ علی القصیدۃ بشكل كامل دون أن تأخذ من المطولۃ الأولی لفظۃ واحدۃ، ثم...

اقبال کی شخصی تعمیر کے چند پہلو: تحقیقی مطالعہ

Life of Iqbal is the source of many virtues. This article focuses on some of the sources and motivations that influenced Iqbal's personality. Home environment was the first school of training for Iqbal. Parent's training made him a person of outstanding qualities from the time of childhood. The teachers polished more. Iqbal was also influenced by Sir Syed's movement. This article will give you a glimpse of the research and critique of many new aspects. We must consider the motives of Iqbal's knowledge and wisdom. By the study of these motives, we can examine the mental evolution of Iqbal. Therefore, everything should come to light. Iqbal also expressed his love for nature but within limits. Otherwise, people would make nature an idol and start worshiping it. Authoritative quotes from experts are the part of this research article. These references will provide assistance in the topics of Iqbal Studies.

Genetic Mapping and Mutation Analysis of Genes Causing Human Hereditary Skeletal Disorders

Genetic defects in the complex processes of embryonic development of the skeleton and its postnatal maintenance result in different types of clinically diverse and genetically heterogeneous skeletal disorders. This presents a diagnostic challenge because of their nonspecific presentation, variable clinical features, highly overlapping phenotypes and lack of recognition as a discrete clinical entity. The research work, presented in this dissertation, describes clinical and molecular investigations of fourteen families (A-N) segregating various forms of skeletal disorders in autosomal recessive pattern. Clinical examinations were performed at local Government hospitals. Blood samples were collected from both affected and unaffected members of the families. Genomic DNA, extracted from the blood samples, was used for microsatellite and SNP based genetic mapping and whole exome and chain termination sequencing. Clinical features, observed in affected members of six families (A-F), were analogous to a condition named as mucopolysaccharidosis. Linkage in these families was established to chromosome 16q24.3 harboring GALNS gene. Sanger sequencing revealed two novels (p.Phe216Ser, p.Glu121Argfs*37) and two previously reported mutations (p.Pro420Arg, p.Arg386Cys) in GALNS gene in the six families. In silico analysis predicted that the missense mutations affect structure and function of the GALNS protein. Clinical and radiographic examinations of affected members in three families (G-I) underscored the manifestations of acromesomelic dysplasia. Microsatellite based genotyping followed by sequence analysis of the NPR2 gene identified three novel missense mutations (p.Arg749Trp, p.Arg601Ser, p.Leu314Arg) in the families. Human genome scan using SNP microarray followed by exome sequencing discovered a potentially casual frameshift mutation (c.594-595insT; p.Gln198Thrfs*21) in a novel gene KIAA0825 in the family J segregating post-axial polydactyly in an autosomal recessive manner. Affected individuals in family K exhibited peculiar clinical features including post axial polydactyly, speech impairment, hearing impairment of variable degree and proportionate short stature. This condition represented mild form of Joubert Abstract Genetic Mapping and Mutation Analysis of Genes Causing Human Hereditary Skeletal Disorders XVIII syndrome. Whole exome sequencing in the family revealed a novel in-frame deletion mutation (c.1115-1117delCCT; p.Ser372del) in the MKS1 gene. In silico analysis revealed that Ser372 residue resides in the “B9” interacting region of the MKS1 protein and inframe mutation (p.Ser372del) causes alteration in the conformation of mutant protein with two extra α helixes. The present study described three families (L-N) with split hand/foot malformations. In two families (L, M), genetic mapping followed by Sanger sequencing detected a novel frameshift mutation (c.300-306dupAGGGCGG; p.Leu103Argfs*52) in the WNT10B gene. In the third family (N), whole exome sequencing accompanied by SNP microarray, identified six nucleotides duplication (c.217-222dupCACCCG; p.His73_Pro74dup) in a novel causative gene HOXD8. The work presented in the dissertation resulted in the following publications. 1. Irfanullah, Saadullah Khan, Imran Ullah, C. Arnoud Meijer, Marlies Laurense Bik, Johan T den Dunnen, Claudia AL Ruivenkamp, Marriët JTV Hoffer, Gijs WE Santen, Wasim Ahmad (2016). Hypomorphic MKS1 mutation in a Pakistani family with mild Joubert syndrome and atypical features: expanding the phenotypic spectrum of MKS1-related ciliopathies. American Journal of Medical Genetics Part A 9999A:1–5 2. Irfanullah, Muhammad Umair, Saadullah Khan, Wasim Ahmad (2015). Homozygous Sequence Variants in the NPR2 Gene Underlying Acromesomelic Dysplasia Maroteaux Type (AMDM) in Consanguineous Families. Annals of Human Genetics 79: 238–244 3. Abdul Aziz, Irfanullah, Saadullah khan, Faridullah khan zimri, Noor Muhammad, Sajid Rashid, Wasim Ahmad (2014). Novel homozygous mutations in the WNT10B gene underlying autosomal recessive split hand/foot malformation in three consanguineous families. Gene 534: 265–271. 4. Irfanullah, Abdul Nasir, Sarmad Mahmood, Sohail Ahmed, Muhammad Ikram Ullah, Asmat Ullah, Abdul Aziz, Syed Irfan Raza, Khadim Shah, Saadullah Khan, Muhammad Jawad Hassan, Wasim Ahmad (2016). Identification and in silico analysis of GALNS mutations causing Morquio A syndrome in eight consanguineous families. Turkish Journal of Biology: DOI:10.3906/biy-1607-81 Abstract Genetic Mapping and Mutation Analysis of Genes Causing Human Hereditary Skeletal Disorders XIX 5. Asmat Ullah, Ajab Gul, Muhammad Umair, Irfanullah, Abdul Wali, Farooq Ahmad, Abdul Aziz, Wasim Ahmad (2017). Homozygous sequence variants in the WNT10B gene underlie split hand/foot malformation. Genetics and Molecular Biology (Submitted) 6. Irfanullah, Muhammad Ansar, Saadullah Khan, Abdul Aziz, Wasim Ahmad. Exome sequencing revealed a novel gene KIAA0825 underlying autosomal recessive postaxial polydactyly (In Preparation). 7. Irfanullah, Saadullah Khan, Maaike Verschuren, Marlies Laurense Bik, Johan T den Dunnen, Claudia AL Ruivenkamp, Marriët JTV Hoffer, Gijs WE Santen, Wasim Ahmad. Human HOXD8 is a novel candidate gene causing autosomal recessive split hand foot malformation in a large Pakistani consanguineous family (In Preparation) 8. Irfanullah, Syed Zohaib Tayyed Gilani, Saadullah Khan, Wasim Ahmad. Homozygous mutations in NPR2 gene underlying Acromesomelic dysplasia in Pakistani families (In preparation)