Sheikh Mokhlesur Rahman

Bangladesh University of Engineering and Technology | BUET · Department of Civil Engineering

Advanced nutrient removal processes, while improving the water quality of the receiving water body, can also produce indirect environmental and health impacts associated with increases in usage of energy, chemicals, and other material resources. The present study evaluated three levels of treatment for nutrient removal (N and P) using 27 representa...

The potential health effects associated with contaminants of emerging concern (CECs) have motivated regulatory initiatives and deployment of energy- and chemical-intensive advanced treatment processes for their removal. This study evaluates life cycle environmental and health impacts associated with advanced CEC removal processes, encompassing both...

Interim non-technical findings from the project.

High-throughput in vitro assays and AOP-based approach is promising for the assessment of health and ecotoxicological risks from exposure to pollutants and their mixtures. However, one of the major challenges in realization and implementations of the Tox21 vision is the urgent need to establish quantitative link between in vitro assay molecular end...

Investigations of the impact of solid residence time (SRT) on microbial ecology and performance of enhanced biological phosphorus removal (EBPR) process in full‐scale systems have been scarce due to the challenges in isolating and examining the SRT from other complex plant‐specific factors. This study performed a comprehensive evaluation of the inf...

Purpose: The objective of this study was to measure the environmental impact of five different laboratory-scale constructed wetland (CW) treatment systems with varying design approaches, which have been employed to treat different types of wastewater. Moreover, the present study also assessed the feasibility of treating landfill leachate using four...

Transport plays a major role in spreading contagious diseases such as COVID-19 by facilitating social contacts. Standard response to fighting COVID-19 in most countries has been imposing a lockdown – including on the transport sector – to slow down the spread. Though the Government of Bangladesh also imposed a lockdown quite early, it was forced to...

Introduction: Concerns have been raised about the potential for risk compensation in the context of mask mandates for mitigating the spread of COVID-19. However, the debate about the presence or absence of risk compensation for universal mandatory mask-wearing rules—especially in the context of COVID-19—is not settled yet. Methods: Mobility is used...

The mass production of graphene oxide (GO) unavoidably elevates the chance of human exposure, as well as the possibility of release into the environment with high stability, raising public concern as to its potential toxicological risks and the implications for humans and ecosystems. Therefore, a thorough assessment of GO toxicity, including its po...

Polyphosphate (polyP) accumulating organisms (PAOs) are the key agent to perform enhanced biological phosphorus removal (EBPR) activity, and intracellular polyP plays a key role in this process. Potential associations between EBPR performance and the polyP structure have been suggested, but are yet to be extensively investigated, mainly due to the...

One of the major challenges in realization and implementations of the Tox21 vision is the urgent need to establish quantitative link between in-vitro assay molecular endpoint and in-vivo regulatory-relevant phenotypic toxicity endpoint. Current toxicomics approach still mostly rely on large number of redundant markers without pre-selection or ranki...

Polyphosphate (polyP) accumulating organisms (PAOs) are the key agent to perform enhanced biological phosphorus removal (EBPR) activity, and intracellular polyP plays a key role in this process. Potential associations between EBPR performance and the polyP structure have been suggested, but are yet to be extensively investigated, mainly due to the...

The wide application of carbon-based nanomaterials (CNMs) has resulted in the ubiquity of CNMs in the natural environment and they potentially impose adverse consequences on ecosystems and human health. In this study, we comprehensively evaluated and compared potential toxicological effects and mechanisms of seven CNMs in three representative types...

https://transport-links.com/download/modelling-the-links-between-transport-air-quality-and-covid-19-spread-using-naturalistic-data-from-dhaka-and-bangladesh-final-report/ Transport clearly has a large role in spreading contagious diseases such as COVID-19. Standard response to fighting COVID-19 in most countries was to impose a lockdown – includi...

Transport clearly has a large role in spreading contagious diseases such as COVID-19. Standard response to fighting COVID-19 in most countries was to impose a lockdown – including on the transport sector – to slow down the spread. Often various such measures were taken at different times, but their relative impacts are not well quantified, especial...

The mortality and morbidity rates of patients with Asthma and Chronic obstructive pulmonary disease (COPD) usually increase due to elevated levels of air pollution. As the air quality in Dhaka, the capital city of Bangladesh, is very poor, respiratory diseases, including asthma and COPD, pose threat to city-dwellers. In this study, we investigated...

Dhaka Water Supply and Sewerage Authority (DWASA) is the entity responsible for supplying drinking water in Dhaka and its surroundings. In recent years, dissatisfaction is growing among the city dwellers with the water supplied by DWASA due to its poor quality (i.e. clarity, smell, etc.). Due to the COVID-19 pandemic, disruptions of regular mainten...

The availability of safe drinking water is one of the most important public health requirements, especially in developing countries like Bangladesh. Alteration of the physicochemical and microbial property of drinking water supplied through a piped network is commonly caused by contamination at the source, supply systems, and different parts of hou...

Groundwater is a key source of drinking water for 2 billion people around the world. Currently, groundwater is the major source of water for urban supply and for drinking in rural areas of Bangladesh. Despite the depletion in groundwater level due to high volume of extraction, groundwater is still preferable as drinking water source as surface wate...

The availability of safe drinking water is one of the most important public health requirements, especially in developing countries like Bangladesh. Alteration of the physicochemical and microbial property of drinking water supplied through a piped network is commonly caused by contamination at the source, supply systems, and different parts of hou...

The individual cellular level and quantitative PolyP-metal compositions in EBPR (enhanced biological phosphorus removal) systems have hardly been investigated and its potential link to EBPR performance therefore remain largely unknown. In this study, we applied scanning electron microscopy combined with energy dispersive X-ray spectroscopy (SEM/EDX...

This study reports a proof-of concept study to demonstrate the novel approach of phenotyping microbial communities in enhanced biological phosphorus removal (EBPR) systems using single cell Raman microspectroscopy and link it with phylogentic structures. We uses hierarchical clustering analysis (HCA) of single-cell Raman spectral fingerprints and i...

Genotoxicity is considered the major concern for drinking water disinfection by-products (DBPs). Of over 700 DBPs identified to date, only a small number of has been assessed with limited information for DBP genotoxicity mechanism(s). In this study we evaluated genotoxicity of 20 regulated and un-regulated DBPs applying a quantitative toxicogenomic...

The ecological and health concern of mutagenicity and carcinogenicity potentially associated with an overwhelmingly large and ever-increasing number of chemicals demands for cost-effective and feasible method for genotoxicity screening and risk assessment. This study proposed a genotoxicity assay using GFP-tagged yeast reporter stains, covering 38...

Current regulations on water quality are primarily based on the reduction of priority pollutants for water quality pretention and all other side impacts and/or benefits associated with pollutants removal are generally not considered in process selection, design and compliance regulation. The rising health concerns with contaminants of emerging conc...

Dhaka, the capital of Bangladesh, has a population density of around 20,000 per square kilometer and faces the risk of large adverse health impacts due to poor air quality, particularly high particulate matter (PM) concentration. Government decisions aimed at curbing air pollution are usually taken on ad-hoc basis, primarily due to limited capacity...

Dhaka city with a population density of around 20,000 per square kilometer faces the risk of large adverse health impacts due to poor air quality. Government decisions aimed at curbing air pollution are usually taken on ad-hoc basis, primarily due to limited monitoring and limited capacity for analysis of options. There are currently only two conti...