Abdus Salam - Academia.edu (original) (raw)

Papers by Abdus Salam

SN Applied Sciences, 2019

The impact of traffic emitted nitrogen dioxide (NO 2) and fine particulate matter (PM 2.5) on var... more The impact of traffic emitted nitrogen dioxide (NO 2) and fine particulate matter (PM 2.5) on various plant species (Polyalthia longifolia, Swietenia mahagoni, Artocarpus heterophyllus) during different seasons (summer, rainy, and winter) was studied in greater Dhaka city (traffic, residential, and control site), Bangladesh. Air pollution tolerance index (APTI) of these plant species was determined from the measured concentrations of total chlorophyll content (TCC), ascorbic acid (AAC), relative water content (RWC), and pH of the leaf extract. TCC and AAC concentrations in leaves species were determined with UV-visible spectrophotometer. NO 2 concentration was determined with Aeroquel (New Zealand), and PM 2.5 was determined with Aerocet (USA). The measured NO 2 and PM 2.5 concentrations at each sampling location were used to establish a relationship with the determined APTI values. The average value of TCC, AAC, and RWC was found much lower in traffic site compared than that of the control site. High pollution stress on plants was also found in traffic sites showing 30% lower APTI values. The plants become sensitive if the APTI value is smaller than or equal to 12 (APTI ≤ 12). However, the average APTI values in different seasons showed a significant variations and followed the sequence-rainy season (8.10) > summer (7.34) > winter (6.69). The plants had the highest sensitivity towards pollutants during winter time. The average APTI values also varied depending on the locations and plant species with a total average of 7.38 ± 1.17, which indicates the sensitivity of plants towards pollution. On average, the measured concentration of NO 2 was 223 ± 0.15 μg m −3 and PM 2.5 mass was 125.7 ± 0.05 μg m −3. The APTI values showed a strong negative correlation with traffic emitted pollutants NO 2 (R 2 = 0.86) and PM 2.5 (R 2 = 0.70) indicating threats towards the plants survival.

Development of Tejgaon was started during 1950s by Public Works Department (PWD) as an industrial... more Development of Tejgaon was started during 1950s by Public Works Department (PWD) as an industrial area. The first Master Plan of Dhaka (1959) also supported industrial development in Tejgaon. Later in 1968, the then DIT (Dhaka Improvement Trust) planned Tejgaon as light industrial area. After liberation, Tejgaon became the major attraction for immense industrial activity to meet the ever increasing demand of growing population and found its location in the core of the city from the peripheral location as designated in 1959 master plan. Incessant changes in land uses have altered the physical characteristics of the area from the state as it was designed by Dhaka Improvement Trust (DIT) in 1968. Recently government of the People's Republic of Bangladesh has taken a decision to develop the area as a commercial cum residential hub. Therefore this research intends to explore development trend of Tejgaon industrial area mainly from land use perspective. Based on plot level data it studies existing land value, ownership pattern of 430 plots of Tejgaon industrial area. Structure type and height on these plots, floor wise space uses are also analyzed. Development trend of the study area is investigated by means of information like growth of major land uses in the study area, change in land use pattern, structure type and structure height within the plots, change in ownership pattern and land value. This research can act as a base line study for future development plan related to the study area.

SN Applied Sciences, 2019

The impact of traffic emitted nitrogen dioxide (NO 2) and fine particulate matter (PM 2.5) on var... more The impact of traffic emitted nitrogen dioxide (NO 2) and fine particulate matter (PM 2.5) on various plant species (Polyalthia longifolia, Swietenia mahagoni, Artocarpus heterophyllus) during different seasons (summer, rainy, and winter) was studied in greater Dhaka city (traffic, residential, and control site), Bangladesh. Air pollution tolerance index (APTI) of these plant species was determined from the measured concentrations of total chlorophyll content (TCC), ascorbic acid (AAC), relative water content (RWC), and pH of the leaf extract. TCC and AAC concentrations in leaves species were determined with UV-visible spectrophotometer. NO 2 concentration was determined with Aeroquel (New Zealand), and PM 2.5 was determined with Aerocet (USA). The measured NO 2 and PM 2.5 concentrations at each sampling location were used to establish a relationship with the determined APTI values. The average value of TCC, AAC, and RWC was found much lower in traffic site compared than that of the control site. High pollution stress on plants was also found in traffic sites showing 30% lower APTI values. The plants become sensitive if the APTI value is smaller than or equal to 12 (APTI ≤ 12). However, the average APTI values in different seasons showed a significant variations and followed the sequence-rainy season (8.10) > summer (7.34) > winter (6.69). The plants had the highest sensitivity towards pollutants during winter time. The average APTI values also varied depending on the locations and plant species with a total average of 7.38 ± 1.17, which indicates the sensitivity of plants towards pollution. On average, the measured concentration of NO 2 was 223 ± 0.15 μg m −3 and PM 2.5 mass was 125.7 ± 0.05 μg m −3. The APTI values showed a strong negative correlation with traffic emitted pollutants NO 2 (R 2 = 0.86) and PM 2.5 (R 2 = 0.70) indicating threats towards the plants survival.

Development of Tejgaon was started during 1950s by Public Works Department (PWD) as an industrial... more Development of Tejgaon was started during 1950s by Public Works Department (PWD) as an industrial area. The first Master Plan of Dhaka (1959) also supported industrial development in Tejgaon. Later in 1968, the then DIT (Dhaka Improvement Trust) planned Tejgaon as light industrial area. After liberation, Tejgaon became the major attraction for immense industrial activity to meet the ever increasing demand of growing population and found its location in the core of the city from the peripheral location as designated in 1959 master plan. Incessant changes in land uses have altered the physical characteristics of the area from the state as it was designed by Dhaka Improvement Trust (DIT) in 1968. Recently government of the People's Republic of Bangladesh has taken a decision to develop the area as a commercial cum residential hub. Therefore this research intends to explore development trend of Tejgaon industrial area mainly from land use perspective. Based on plot level data it studies existing land value, ownership pattern of 430 plots of Tejgaon industrial area. Structure type and height on these plots, floor wise space uses are also analyzed. Development trend of the study area is investigated by means of information like growth of major land uses in the study area, change in land use pattern, structure type and structure height within the plots, change in ownership pattern and land value. This research can act as a base line study for future development plan related to the study area.