Papers by Syed Hafizur Rahman
IOP Conference Series: Earth and Environmental Science, 2009
Journal of Scientific Research, 2011
The work was conducted for improving textile effluent quality via turbidity removal by electrocoa... more The work was conducted for improving textile effluent quality via turbidity removal by electrocoagulation (EC) using aluminum sacrificial electrode. Effluents were treated at 30 minutes and 30 volts (30min-30V) and 60 minutes and 40 volts (60min-40V) condition in a 1000 ml reactor cell with anode distance of 4 cm. Prior to EC experiment, physico-chemical parameters of effluent were measured and turbidity level was found eight times higher than the Department of Environment (DoE) standard. Turbidity removal ranged from 53 to 96.2% and 58 to 97.5% for condition one and two, respectively. Dissolved oxygen (DO) increased satisfactorily for both conditions. Total operational cost ranged from 62.50 to 70.41 taka/m3 at 30min-30V and 159.57 to 187.7 taka/m3 at 60min-40V. Moreover, sludge formation ranged from 6.73×10-4 to 8.41×10-4 kg in first condition and 1.21×10-3 to 1.5431×10-3 kg in second one. So, EC treatment was very effective and capable of elevating quality of the textile wastewat...
Applied Sciences, 2012
Intense urbanization, large scale industrialization and unprecedented population growth in the la... more Intense urbanization, large scale industrialization and unprecedented population growth in the last few decades have been responsible for lowering environmental quality. Soil contamination with metals is a serious concern due to their toxicity and ability to accumulate in the biota. The present work assessed the heavy metal contamination of agricultural soil in the close vicinity of the Dhaka Export Processing Zone (DEPZ) in both dry and wet seasons using different indices viz., index of geoaccumulation (I geo), contamination factor (C), degree of contamination (C), modified degree of contamination (mC d) and pollution load index (PLI). Samples were collected from the surface layer of soil and analyzed by Atomic Absorption Spectrophotometer (AAS). The trend of metals according to average concentration during the dry and wet seasons was As
Journal of Radioanalytical and Nuclear Chemistry
Bangladesh Journal of Botany
The study was conducted to estimate the biomass and carbon stock in the dominant tree species of ... more The study was conducted to estimate the biomass and carbon stock in the dominant tree species of the Kaptai National Park of Bangladesh. A total of 77 tracks and 308 plots were selected and all trees in each plot were measured to estimate the biomass following allometric equations. There were planted stand of Acacia auriculiformis, Dipterocarpus turbinatus, Gmelina arborea, Lagerstroemia speciosa, Swietenia macrophylla and Tectona grandis. Biomass and carbon stocks of these corresponding tree species were 35.03, 73.86, 23.52, 30.16, 44.49, and 42.67 mg/ha. The highest carbon stock per tree was in D. turbinatus (372.19 kg C/tree), followed by S. macrophylla (226.49 kg C/tree), T. grandis (215.06 kg C/tree), A. auriculiformis (176.56 kg C/tree), L. speciosa (151.19 kg C/tree) and G. arborea (118.54 kg C/tree), respectively. The findings of the study will be helpful for the estimation of carbon stocks in the forests of Bangladesh. Bangladesh J. Bot. 50(2): 365-371, 2021 (June)
IAHS-AISH publication, 2011
Production of manufactured nanoparticles (mNPs) is likely to increase significantly in the near f... more Production of manufactured nanoparticles (mNPs) is likely to increase significantly in the near future. To investigate mNP mobility in sandstone groundwaters, column experiments have been completed on intact continental redbed sandstone. SiO 2 mNP breakthrough concentrations decrease as ionic strength increases, with reversibility indicating secondary minimum attachment: a maximum retention capacity is observed. In contrast, initial metal oxide mNP breakthrough concentrations in deionized water gradually fall as clogging occurs, mobility being in the order (Si >) Ti, Sb > Ce, Ag: no detectable breakthrough occurs for artificial groundwater solutions, even after many 100s of pore volumes. These results suggest that most particles have limited mobility, consistent with measured ζ potentials, but that remobilization can occur if conditions change. A small proportion of particles appear to be more mobile, and this is confirmed by the presence of small amounts of mNPs in wellwaters.
Polymer Journal, 2016
Identifying Municipal Solid Waste (MSW) disposal sites and appropriately managing them is a chall... more Identifying Municipal Solid Waste (MSW) disposal sites and appropriately managing them is a challenging task to many developing countries like Bangladesh. It is a complex issue in an urban area, as increasing population levels, rapid economic growth and rise in community living standard, accelerates the generation rate of MSW. The study area is zone-2 (Mirpur-Pallabi) of Dhaka North City Corporation (DNCC) (10.40 km2) is a residential area, from where about 353.34 ton/day solid waste is generated and among them about 57.43% were managed by DNCC. There are 41 different size containers present at 17 locations in study area. The existing site and waste collecting containers are not sufficient, which deteriorates the environment due to illegal waste dumping and about 15 illegal dumping sites were identified. To identify proper waste dumping site and prevent contamination, Geographical Information System (GIS) was used to propose an efficient scenario with relocating the existing waste c...
Climate change-induced disasters are the socioeconomic and cultural concerns in Bangladesh. As a ... more Climate change-induced disasters are the socioeconomic and cultural concerns in Bangladesh. As a consequence, vast of coastal people has been displaced from their origin. The main aim of this study is to explore the socioeconomic crisis of climate-induced displacement people in the coastal Bangladesh. Results showed that the relationship socioeconomic conditions of displaced people in the preand post-displacement situations was significant, while the source of drinking water and health-care facilities was non-significant. Apparently, socioeconomic condition of the displaced people were completely change as low level in the present living place compare to origin area. After displacement, they were losing their identity, social, and cultural harmony and face social, cultural, political, and environmental crisis. Therefore, to ensure civilian rights, strengthening the climate change-related laws, rules, and policies “community based resettlement program” will accelerate the sustainable...
In coastal regions of Bangladesh, sources of irrigation are rain, surface and groundwater. Due to... more In coastal regions of Bangladesh, sources of irrigation are rain, surface and groundwater. Due to rainfall anomaly and saline contamination, it is important to identify deep groundwater that is eligible for irrigation. The main goal of the study was to identify deep groundwater which is suitable for irrigation. Satkhira Sadar Upazila, at the southwestern coastal zone of Bangladesh, was the study area, which was divided into North, Center and South zones. Twenty samples of groundwater were analyzed for salinity (0.65-4.79 ppt), sodium absorption ratio (1.14-11.62), soluble sodium percentage (32.95-82.21), electrical conductivity (614-2082.11 µS/cm), magnesium adsorption ratio (21.96-26.97), Kelly’s ratio (0.48-4.62), total hardness (150.76-313.33 mg/l), permeability index (68.02-94.16) and residual sodium bi-carbonate (79.68-230.72 mg/l). Chemical constituents and values were compared with national and international standards. Northern deep groundwater has the highest salinity and ch...
Climate change related knowledge and activities have been evolved, and Bangladesh tried to figure... more Climate change related knowledge and activities have been evolved, and Bangladesh tried to figure out appropriate pathways to address climate change challenges sustainably. This paper critically examined the chronological progression of climate change action programs performed in Bangladesh, aiming to identify the factors that created varied forms of confusion in tackling climate change threats. This review based work identified that the concept of climate change has conveyed into the contexts through disaster management discourse in Bangladesh. Climate change understanding and action programs could be divided into three groups (early-stage (1980-2000), mid-stage (2001-2010), and third stage (2011-2020). While early-stage works related to the basic understanding of ozone layer depletion, greenhouse effect, global warming, and their impacts on natural resources and physical functions, mid-stage reports contain impact narratives on different sectors and outlined action plans. The thir...
Radiation Protection Dosimetry
On-site radon concentration has been measured in soil gas and ground water using AlphaGUARD PQ200... more On-site radon concentration has been measured in soil gas and ground water using AlphaGUARD PQ2000 PRO (Saphymo, Germany) radon monitor at the west coastal area of Bangladesh. The measured radon concentration in ground water samples is in the range of 1.41 ± 0.29 to 3.2 ± 0.59 Bq/l with the mean value of 2.33 ± 0.50 Bq/l, which lies within the safe limit recommended by UNSCEAR (2008). The total annual effective dose estimated due to radon concentration in ground water ranges from 3.85 to 8.74 μSv/y with the mean value of 6.37 μSv/y, which is lower than the safe limit set by WHO (2004) and EU (1998). In soil samples, radon concentration has been measured at three different depths (0, 20 and 40 cm) in each location. The highest and the lowest concentrations are 4790 ± 51 and 10 ± 04 Bq/m3 at 40 and 0 cm (surface) depth, respectively, which lie within the natural background levels.
Grassroots Journal of Natural Resources
This study aims at classifying land use land cover (LULC) patterns and detect changes in a 's... more This study aims at classifying land use land cover (LULC) patterns and detect changes in a 'secondary city' (Savar Upazila) in Bangladesh for 30 years i.e., from 1990 to 2020. Two distinct sets of Landsat satellite imagery, such as Landsat Thematic Mapper (TM) 1990 and Landsat 7 ETM+ 2020, were collected from the United States Geological Survey (USGS) website. Using ArcMap 10.3, the maximum likelihood algorithm was used to perform a supervised classification methodology. The error matrix and Kappa Kat were done to measure the mapping accuracy. Both images were classified into six separate classes: Cropland, Barren land, Built-up area, Vegetation, Waterbody, and Wetlands. From 1990 to 2020, Cropland, Barren land, Waterbody, and Wetlands have been decreased by 30.63%, 11.26%, 23.54%, and 21.89%, respectively. At the same time, the Built-up area and Vegetation have been increased by 161.16% and 5.77%, respectively. The research revealed that unplanned urbanization had been prac...
Modern Supply Chain Research and Applications
PurposeThe nature of farm animals in the marginalized group of people is varying hurriedly. Lives... more PurposeThe nature of farm animals in the marginalized group of people is varying hurriedly. Livestock is used to add to cash earnings and increase food security, hence helping as a vital component in the household’s source of revenue strategies, particularly at marginal planter’s level. The present study was conducted to assess the numbers of livestock farmers in the study areas, their livelihood options, the value chain of the farmers in different marketing channels and recommendation for the sustainable value chain of the livestock production cycle.Design/methodology/approachThe study precise the baseline condition of marginal livestock farmers for access to value chain activities in terms of inputs, outputs, support services, production, yield, income and enabling environment to enhance livestock farming in the study area. The study was conducted through stratified random sampling of the context using some research tools like in-depth interviews, household surveys, expert opinion...
Encyclopedia of the UN Sustainable Development Goals
The coastal zone can be defined in various ways depending on the heart of interest and the availa... more The coastal zone can be defined in various ways depending on the heart of interest and the availability of relevant data. According to the Millennium Ecosystem Assessment, 100 km from the coast as the distance door sill and 50 m as the elevator door sill, choosing whichever was closer to the sea. So, the interaction between the land and water is considered a coastal zone where the majority of the world's populations live in the zone. About 40% of the global population inhabiting within 100 km of the coastline. This zone rapidly changing because of the active boundary between the oceans and the land. Winds and waves of the estuarine rivers across the coastal areas are equally eroding the rocks and sediment depositing regularly basis, and erosion rates and deposition noticeably from day to day in the coastal zone. On the other hand, the wetlands are fundamental for the survival of humanity (Islam et al. 2014). On the other hand, wetland can be defined as the areas where water covers the soil or is in attendance either at or near the soil surface all year or for anecdotal periods during the year, as well as during the growing season. There are two common types of wetlands that are recognized in the world which are coastal or tidal wetlands and inland or nontidal wetlands. Wetlands are active aquatic ecosystems established all over the world. A wetland is an area of land which is drenched with water either lastingly or seasonally (Thanh and Yabar 2015).
The Palgrave Encyclopedia of Urban and Regional Futures
Asian Journal of Water, Environment and Pollution
Benthic communities are important to any aquatic ecosystem and form important food source for mos... more Benthic communities are important to any aquatic ecosystem and form important food source for most organisms especially fish. The study about macro benthos was carried out in a canal of southeastern coast of Bangladesh with some physico-chemical parameters of water and soil during post and pre-monsoon seasons. The canal originates from hilly areas and opens into the Bay of Bengal. Polychaetes were the most abundant group followed by Oligocheates Bivalves crabs during post-monsoon. Oligocheates were the most abundant group followed by Polychaetes, Bivalves during pre-monsoon. Salinity showed positive significant relationship with the Polycheates and as well as Phosphate-Phosphorus. A negative significant relationship was found between Chemical Oxygen Demand (COD) and Oligocheates abundance in the investigated canal and a positive relationship was found between Total Suspended Solids and Oligocheates abundance. There was no relationship among the parameters of water as well as soil and crab abundance. The abundance of macro benthos is useful indicators of the condition of the canal and of the canal habitat as a whole. The effect of anthropogenic induced stressors had resulted in an unstable physically controlled environment characterized by a low density of macrobenthos.
International Journal of Climate Change Strategies and Management
Purpose Climate change is affecting people displacement in Bangladesh by both sudden environmenta... more Purpose Climate change is affecting people displacement in Bangladesh by both sudden environmental events and gradual environmental change. This paper aims to assess the sustainable adaptation measures for resolving the displacement problem induced by climate change considering the socioeconomic differences between the past and the present location of living places for island dwellers of the south-eastern coast of Bangladesh. Design/methodology/approach Both qualitative and quantitative approaches were adopted for conducting the study. The main tool of the household survey was a questionnaire survey. In addition to the estimate of displacement, the authors have used hazard impact analysis, weightage analysis and sustainable adaptation analysis with various ranking. Meaningful data were analyzed through SPSS software and presented through statistical techniques. Findings Climate change-induced different natural disasters, such as cyclone, tidal surge, tidal flood and coastal erosion,...
logging is a form of flooding within the embankments caused by hydro-geophysical factors where wa... more logging is a form of flooding within the embankments caused by hydro-geophysical factors where water remains stagnant for long time due to increased sedimentation of Riverbeds and reduced height differential between embankment and peak water level (Islam et al., 2004). Water-logging has been affecting about millions of people in Bangladesh during the past two decades leading to a large scale damages of crop, employment, livelihoods and national economy (Mirza et al., 2005). About two hundred years ago, the Mathabhanga River supplied fresh water throughout the year to the Kopotaksho River (Williams, 1919). After being cut-off from the Mathabhanga River, the Kopotaksho had been subjected to tidal domination, associated with increasing sedimentation by tidal pumping process, particularly in the dry season. During the last few decades, the flow of the Kopotaksho River had been declining very rapidly. As a result of successive siltation both in the upstream and downstream, the linked up ...
Polish Journal of Environmental Studies
Environmental flow is required to ensure the ecosystem, as well as the survival of aquatic life i... more Environmental flow is required to ensure the ecosystem, as well as the survival of aquatic life in the urban river [1]. However, rivers in urban areas around the world continued to be polluted by untreated wastewater from industrial and domestic sources. As a result, the degree of physicochemical parameters, especially the concentration of heavy metals (HMs) in urban rivers, has reached alarming levels [2, 3].
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Papers by Syed Hafizur Rahman