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Study of the Inorganic Contaminants in Wet and Dry Deposition in Karachi City

Thesis Info

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Author

Shadiah Masood, Saiyada

Program

PhD

Institute

University of Karachi

City

Karachi

Province

Sindh

Country

Pakistan

Thesis Completing Year

2015

Thesis Completion Status

Completed

Subject

Chemistry

Language

English

Link

http://prr.hec.gov.pk/jspui/bitstream/123456789/13223/1/Saiyada_Shadiah_Masood_Chemistry_2015_HSR_HEC_Scholar_25.08.216_Univ_of_Karachi.pdf

Added

2021-02-17 19:49:13

Modified

2024-03-24 20:25:49

ARI ID

1676727397584

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Karachi, being one of the largest urban setup in the world under the sprawl of rapid and unplanned urbanization, is at the risk of contaminated atmosphere. In the present study, chemical contaminants were assessed and monitored in wet and dry atmospheric depositions of Karachi to identify the adverse impact of anthropogenic activities mainly and climatic influence in general affecting atmospheric composition of Karachi. Samples of rainwater had been collected for five years (i.e. 2008, 2010 – 2013), to estimate the ionic load in wet deposition. Similarly, dust samples were collected from different sites for the analyses and estimation of contaminants in dry deposition. Sampling sites with intense vehicular activities, neighboring to industrial zone and sites in congested localities where routine dumping and burning of garbage were in progress, were given due consideration during the sampling campaigns. Major ions (F-, Cl-, SO42-, NO2-, NO3-, HCOO-, CH3CHOO-, C2O42-, Li+, Na+, K+, Mg2+ and Ca2+) were analyzed through Ion Chromatography as per EPA method 300, UV/Visible spectrophotometer was used for the analysis of NH4+ and TOC analyzer was used for the monitoring of TOC in rainwater samples. XRF analysis was carried out for the quantitative scanning of complete elemental profile of dry samples. Heavy metals were also monitored along with other elements. Air mass back trajectories were generated for the rainy events using NOAA HYSPLIT model for confirming the climatic control on the composition of rainwater. GIS was used as a tool to interpret data through thematic maps. Source apportionment of contaminants was supported by evaluating different factor like Enrichment Factor (EF), Neutralization Factor (NF), Correlation Matrix, and Factor Analysis (FA) using PCA (Principal Component Analysis). It was concluded through the detailed systematic analysis and processing of the data through several statistical and GIS models that acidic ions are present in high concentrations which are concealed by the neutralizing agents like Na+ and Ca2+ in atmosphere. Elemental profile indicates the alarming enrichment of Pb and Zn in atmospheric deposition samples of industrial areas and sites with high vehicular activities. This study provides very first systematic efforts to set a baseline data of contaminants in the ambient atmospheric wet and dry depositions of Karachi city.
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مرزا نیاز احمد بیگ

مرزا نیاز احمد بیگ
افسوس ہے کہ ۷؍ فروری کو دارالمصنفین کے ایک قدیم رکن مرزا نیاز احمد بیگ بھی رحلت فرماگئے، وہ اعظم گڑھ کے ممتاز اور کامیاب وکیل اور شہر کے عمائد میں تھے، مولانا شبلیؒ اور ان سے نسبت رکھنے والے تمام اداروں سے ان کو بڑا تعلق تھا، شبلیؒ نیشنل پوسٹ گریجویٹ کالج کی مجلس انتظامیہ کے برسوں رکن اور نائب صدر رہے، اب ان کی تمام تر توجہ دارالمصنفین کی طرف مرکوز ہوگئی تھی جس کی مجلس انتظامیہ کے وہ آخر دم تک رکن رہے، دارالمصنفین کے نازک اور بحرانی دور میں ان کے مفید قانونی مشوروں سے اس کو بڑا فائدہ پہنچا، اب وہ اپنے ایک سچے بہی خیرخواہ اور مخلص ہمدرد سے محروم ہوگیا، وہ صوم و صلوٰۃ کے ہمیشہ سے پابند رہے، حج بیت اﷲ سے بھی مشرف ہوئے، آخر عمر میں ان کی دینداری زیادہ بڑھ گئی تھی، علماء و صلحاء سے بھی تعلق رکھتے تھے، حضرت مولانا سید ابوالحسن علی ندوی سے خاص عقیدت تھی، اﷲ تعالےٰ ان کی بشری لغزشوں سے درگذر فرمائے۔ اور انھیں اپنے جوار رحمت میں جگہ دے۔
(ضیاء الدین اصلاحی، فروری ۱۹۸۸ء)

 

Faktor-faktor yang mempengaruhi Integritas Laporan Keuangan (Studi Pada Perusahaan BUMN yang Terdaftar di BEI Periode 2020- 2022)

The aim of this research is to determine the influence of managerial ownership, audit committee, audit quality and company size on the integrity of financial reports. The objects in the research are state-owned companies registered on the IDX for the 2020-2022 period, totaling 20 companies. The sampling technique uses purposive sampling. Data analysis uses multiple linear regression. The research results explain that simultaneously managerial ownership, audit committee, audit quality and company size have a significant influence on the integrity of financial reports. While managerial ownership and company size have a negative and significant influence, the audit committee has a positive and significant influence, audit quality has a positive and insignificant influence.

Islamic Studies for Engineering Program: A Topical Framework

Islamic Studies is taught at undergraduate level as compulsory core subject in engineering programs following the recommendations of national educational policies of Islamic Republic of Pakistan and Higher Education Commission (HEC) Pakistan, but the contents of the course are only the repetition of what student had studied earlier in their course of studies from beginning, also the topics selection do not match with the cognitive maturity of learners neither their professional needs. This exploratory study was to find the need for revision in the content of Islamic Studies course at undergraduate level in engineering discipline. A cross- sectional exploratory survey was conducted to discover the needs for the topics of interest for the subject of Islamic Studies at undergraduate engineering program. Needs in the current study are considered as gaps between the existing course contents and preferred contents or topics by the respondents. The data was collected through purposive sampling from 808 research respondents of engineering (from both Public and Private Higher Education Commission (HEC) recognized, and Pakistan Engineering Council (PEC) institutions of Karachi as well as general universities, total 12 universities). The sample comprised of five categories: students of engineering discipline (541), teachers of engineering discipline (170), Teachers of Islamic studies (experts) teaching in Engineering discipline,Teachers (experts) of Islamic Studies that are teaching to wide range of academic disciplines (32), and engineers who are working as professionals (65). The gender representation in the sample remained 66% (male), and 34% female respondents. A questionnaire using extent data analysis technique for structure and content was developed to collect data. 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