Newaz Mohammed Bahadur

Noakhali Science and Technology University

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Md. Sahadat Hossain

Bangladesh Council of Scientific and Industrial Research

Samina Ahmed

Bangladesh Council of Scientific and Industrial Research

Takeshi Furusawa

Utsunomiya University

Masahide Sato

National Institute of Advanced Industrial Science and Technology

Noboru Suzuki

Utsunomiya University

Md. Shahadat Hossain

Noakhali Science and Technology University

Fumio Kurayama

Toyota Technological Institute

Md. Kawcher Alam

Bangladesh Council of Scientific and Industrial Research

Iqbal Ahmed Siddiquey

Shahjalal University of Science and Technology

Md. Abu Kawsar

Sylhet Agricultural University

Cooperative Institutions

Noakhali Science and Technology University

108

University of Dhaka

Bangladesh Council of Scientific and Industrial Research

Shahjalal University of Science and Technology

University of Rajshahi

International Centre for Diarrhoeal Disease Research

North South University

Utsunomiya University

Bangabandhu Sheikh Mujib Medical University

Bangladesh Agricultural University

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Synthesis of nano crystallite cellulose and chitosan from waste natural source for the adsorption of cationic and anionic dyes in aqueous medium

Hybrid Advances (2024)

Supanna Malek Tuntun Md. Sahadat Hossain Sumaiya Akter Newaz Mohammed Bahadur Md. Saiful Alam

This research work narrates an economically friendly way to synthesize cellulose nanocrystal (CNC) and chitosan (CS) from waste jute bag and shrimp shell, respectively. Different analytical techniques such as X-ray diffraction (XRD), Fourier transform infrared (FT-IR) spectroscopy, and Scanning electron microscopy (SEM) were adopted to characterize diverse chemical and physical properties of the prepared samples, for the confirmation of the identity and assessment of the compatibility of the synthesized specimen for the targeted application. Crystallite size and crystallinity index were accounted for using XRD standard for CNC. The degree of deacetylation was also enumerated using chitosan's FT-IR record which was almost 98 %. The rest of this work is based on the hypothesis that, solely, an adsorbent exhibit either negative or positive net charge and shows affinity towards only oppositely charged dye molecules, while an appropriate hybrid blend of both negatively and positively charged adsorbent may show approximately equal affinity toward both anionic and cationic dye. Based on this concept, the potentiality of blending varying percentages of CNC and CS, as an adsorbent was monitored by executing the adsorption process considering different parameters like adsorbate interaction with adsorbent, pH, influence of initial concentration, contact time and dose of adsorbate with mostly found textile dyes Methylene blue (MB) and Congo red (CR) in wastewater which are cationic and anionic respectively. Cellulose nanocrystal and chitosan in the ratio of 50:50 showed an excellent result in the removal of both dye molecules.

Cationic polymerization

Methylene blue

Congo red

10.1016/j.hybadv.2024.100270

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Citations (0)

Efficient hydrogen peroxide decomposition on bimetallic Pt–Pd surfaces

Catalysis Communications (2010)

Mohammad A. Hasnat M. Maria Rahman S. M. Borhanuddin Ayesha Siddiqua Newaz Mohammed Bahadur

Bimetallic strip

Chemical decomposition

Peroxide

10.1016/j.catcom.2010.10.001

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Citations (57)

Occurrence, Spatial Distribution and Risk Assessment of Microplastics in Water and Sediments of Hatiya Island, Bangladesh

Md Fardullah Md. Tanvir Hossain Mohammad Saimon Islam MR Islam Md Rakibur Rahman

10.2139/ssrn.4860691

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Sustainable groundwater quality in southeast coastal Bangladesh: co-dispersions, sources, and probabilistic health risk assessment

Environment Development and Sustainability (2021)

Abu Reza Md. Towfiqul Islam Mohammad Mahbub Kabir Sharmina Faruk Jawad Al Jahin Md. Bodrud-Doza

Hazard quotient

10.1007/s10668-021-01447-4

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Citations (48)

Morphological change of ZnO using hydrothermal technique and organic modifiers

Nano-Structures & Nano-Objects (2025)

Md. Kawcher Alam Md. Sahadat Hossain Muhammad Sajid Hamid Akash Abdullah Al Miad Muhammad Shahriar Bashar

10.1016/j.nanoso.2025.101436

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Citations (0)

Phenol Removal from Aqueous System by Jute Stick

DOAJ (DOAJ: Directory of Open Access Journals) (2008)

A. I. Mustafa Md. Saiful Alam Muhamad Amin Newaz Mohammed Bahadur Ahsan Habib

The adsorption technique using jute sticks has been applied for the removal of phenol from aqueous solutions. The extent of removal was dependent on concentration of phenol, contact time, pH, and quantity of adsorbent. With an initial concentration of 40 ppm phenol in 100 mL and pH 10.0, the removal was found to be about 68% with 3.0 g jute stick. The time to reach equilibrium was found to be 5 hr. The applicability of Freundlich isotherm to the adsorption of phenol system was tested at 25 0 C to 40 0 C at pH 10.0. The spent adsorbent was regenerated by acid treatment.

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Citations (18)

Wastewater based surveillance system to detect SARS-CoV-2 genetic material for countries with on-site sanitation facilities: an experience from Bangladesh

medRxiv (Cold Spring Harbor Laboratory) (2021)

Md. Jakariya Firoz Ahmed Md. Aminul Islam Tanvir Ahmed Abdullah Al Marzan

Abstract The presence of SARS-CoV-2 genetic materials in wastewater has become a matter of grave for many countries of the world. Wastewater based epidemiology, in this context, emerged as an important tool in developed countries where proper sewage system is available. Due to the recent shift in the spread of the infection from urban to rural areas, it is now equally important to develop a similar mechanism for rural areas as well. Considering the urgency of the issue a study was conducted in 14 districts of Bangladesh and a total of 238 sewage samples were collected in two different periods from December 2020 to January 2021. We are the first to propose a surveillance system for both urban and rural areas where a proper sewage system is absent. Based on RT-PCR analysis of the water samples, in more than 92% of cases, we found the presence of the SARS-COV-2 gene (ORF1ab, N, and Internal Control-IC). The trend of Ct value varies for different study locations. The spread of genetic material for on-site (Δm = 0.0749) sanitation system was found more prominent than that of off-site sewage system (Δm = 0.0219); which indicated the shift of genetic material from urban to rural areas. Wastewater samples were also measured for physicochemical parameters, including pH (6.30 - 12.50) and temperature (22.10 - 32.60) ºC. The highest viral titer of 1975 copy/mL in sewage sample was observed in a sample collected from the isolation ward of the SARS-COV-2 hospital. Additionally, a correlation was found between bacterial load and SARS-CoV-2 genetic materials. The results indicated the association of increased Ct values with decreasing number of patients and vice versa. The findings reported in this paper contributed to the field of wastewater-based epidemiology dealing with SARS-COV-2 surveillance for developing countries where proper sewage system is absent and highlighting some of the challenges associated with this approach in such settings. Highlights Development of wastewater-based surveillance system based on on-site sanitation system for developing countries. Association of different environmental parameters with the presence of SARS CoV-2 genetic material in wastewater. Prediction of the viral concentration of sewage system using viral load and copy number parameter. Graphical Abstract

10.1101/2021.07.30.21261347

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Citations (18)

Synthesis of nano-crystallite hydroxyapatites in different media and a comparative study for estimation of crystallite size using Scherrer method, Halder-Wagner method size-strain plot, and Williamson-Hall model

Heliyon (2024)

Md. Abu Kawsar Md. Sahadat Hossain Newaz Mohammed Bahadur Samina Ahmed

Hydroxyapatite (HAp) [Ca10(PO4)6(OH)2] is remarkably similar to the hard tissue of the human body and the uses of this material in various fields in addition to the medical sector are increasing day by day. In this research, mustered oil, soybean oil, as well as coconut oil were employed as liquid media for synthesizing nanocrystalline HAp using a wet chemical precipitation approach. The X-ray diffraction (XRD) study verified the crystalline phase of the HAp in all the indicated media and discovered similarities with the standard database. Several prominent models such as the Scherrer's Method (SM), Halder-Wagner Method (HWM), linear straight-line method (LSLM), Williamson-Hall Method (W-M), Monshi Scherrer Method (MSM), Size-Strain Plot Method (SSPM), Sahadat-Scherrer Method (S–S) were applied for the determination of crystallite size. The stress, strain, and energy density were also computed from the above models. All the models, without the Linear straight-line technique of Scherrer's equation, resulted in an appropriate value of crystallite size for synthesized products. The calculated crystallite sizes were 6.5 nm for HAp in master oil using Halder-Wagner Method, and 143 nm for HAp in coconut oil using the Scherrer equation which were the lowest and the largest, respectively.

Hydroxyapatites

Scherrer equation

Plot (graphics)

10.1016/j.heliyon.2024.e25347

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Citations (30)

Physical properties of newly synthesized noncentrosymmetric TaIr₂B₂ and NbIr₂B₂ superconductors: an extensive comparison of GGA and LDA functional investigations

RSC Advances (2024)

Jakiul Islam Mohasena Ahamed Md. Saiful Alam Newaz Mohammed Bahadur

In recent years, noncentrosymmetric (NCS) structural compounds have received much attention from the scientific community in the exploration for the unconventional nature of superconductivity with exciting physical properties.

10.1039/d4ra02822h

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Citations (1)

Easy and green synthesis of nano-ZnO and nano-TiO2 for efficient photocatalytic degradation of organic pollutants

Heliyon (2024)

Nusrat Jahan Tamanna Md. Sahadat Hossain Sumaya Tabassum Newaz Mohammed Bahadur Samina Ahmed

As the textile industry expands, more industrial waste effluents are released into natural water streams, prompting the research and development of innovative materials for the remediation of environmental issues. In this research, a direct precipitation and hydrolysis method were used to synthesize ZnO and TiO

Degradation

Industrial chemistry

Textile industry

10.1016/j.heliyon.2024.e37469

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Citations (1)