Abhrajyoti Tarafdar

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• PhD
• Assistant Lecturer at Technological University Dublin

A novel method for the volumetric detection of microplastics in various environmental (soil, water) and food (fish, meat) matrices was developed. The method is based on the Nile Red staining of microplastics while eliminating probable interference by other organic polymers such as lignin, chitin, cellulosic materials, and other organic substances u...

Interactions between microbes and microplastics are important as of emerging plastic loads in the global environment. Although diverse plastic additives are used in large amounts, there are very few studies on a quantitative comparison of plastisphere on plastics with different plastic additives. We studied the effects of two widely used UV stabili...

A low-density polyethylene (LDPE) degrading bacterial strain (ATKU1) was isolated (99.86% similar with Ba-cillus siamensis KCTC 13613T) from a plastic dumping site to study interactions between microplastics (<5 mm) and microorganisms. The strain was found (by scanning electron microscopy) to form biofilm on the microplastic surface after its inter...

Populations living in the vicinity of oil refinery sludge deposition sites may be at greater risk of potential exposure to polycyclic aromatic hydrocarbons (PAHs) through inhalation, ingestion, and direct contact with contaminated media. Three Indian oil refinery sludge deposition sites (at Haldia, Barauni and Guwahati) were chosen for study. Soil...

As the prevalence of diseases caused by microbial pathogens like bacteria and viruses continues, early detection becomes paramount to curb their spread. Conventional methods for detecting waterborne pathogens, such as the Most Probable Number (MPN) technique, are often complex and time-consuming. This study presents an innovative approach, utilizin...

Efforts to standardize microplastic extraction methods for environmental and food samples have often overlooked their environmental impact and sustainability. This study comprehensively reviews various analytical methods and assesses their sustainability using the Analytical GREEnness calculator. Toxic chemical usage was found to have the greatest...

Profiling and cancer risk assessment on the polycyclic aromatic hydrocarbons (PAHs) content of coal ashes produced by the major coal combustion plants from the eastern coalfield region in India was conducted. Thirteen PAHs were detected on coal ashes collected from ash deposition sites of major thermal power plants and the profiling of the PAHs was...

The generation of solid waste (SW) has a direct connection with the monetary status of individuals and shows in terms of gross domestic product (GDP)/gross national income (GNI). The high-income countries (HICs) have shown a lingering generation of solid waste, mainly municipal solid waste (MSW). The MSW of HICs include organic biodegradable, paper...

Sorption by soil organic matter (SOM) is considered the most important process affecting the bioavailability of hydrophobic organic chemicals (HOCs) in soils. The sorption capacity of SOM for HOCs is affected by many environmental factors. In this study, we investigated the effects of soil pH on the sorption capacity of SOM using batch sorption exp...

Water samples at 13 sites were analyzed to evaluate heavy metals (cobalt, lead, manganese, copper) and benzo(a)pyrene using 2 methods of analysis (high-performance liquid chromatography (HPLC) and enzyme-linked immunosorbent assay (ELISA) kits). The Lesser Zap River is the main tributary of the Tigris and is used as a main source of drinking water...

Cancer risk can be associated with exposure to polycyclic aromatic hydrocarbons (PAHs) in playground dust and soil. This study investigated the profiles and sources of PAHs from poured rubber-surfaced playground dust and uncovered playground surface soil, by applying an ex-situ equilibrium passive sampling technique. Surface dust and soil samples w...

The Lesser Zap River is the main tributary of the Tigris and is used as a main source of drinking water in Kirkuk city through the General Kirkuk project. Water samples at 13 sites were analyzed for heavy metals (cobalt, lead, manganese, copper) and benzo(a)pyrene using 2 methods of analysis (high-performance liquid chromatography (HPLC) and enzyme...

Human exposure to microplastics contained in food has become a significant concern owing to the increasing accumulation of microplastics in the environment. In this paper, we summarize the presence of microplastics in food and the analytical methods used for isolation and identification of microplastics. Although a large number of studies on seafoo...

A gram-positive gabapentin-degrading bacteria strain N.ISM.1 was isolated from the pharmaceutical plant soil. According to the analysis of 16S rRNA gene sequence, the strain was categorized as a Micrococcus luteus. Though the strain N.ISM.1 is capable of degrading gabapentin (GABA), this compound cannot provide enough carbon source for the isolated...

Children can get affected by polycyclic aromatic hydrocarbons (PAHs) while they interact with play area soil/rubber surfacing and exposed to PAHs by dermal contact, inhalation and hand-to-mouth activity. A comparative study has been conducted on PAHs profiling and probable cancer risk of children from PAHs present in uncovered playground surface so...

Coal can turn out to be more vital as an energy source in the present century, and coal includes substantial amounts of organic and inorganic matter. At the point when coal burns, chemical and physical transformations take place, and numerous harmful mixes are shaped and excreted. The combustion of pulverized coal to produce electrical energy in th...

A carcinogenic risk assessment of polycyclic aromatic hydrocarbons (PAHs) in dietary components was conducted using probabilistic approach from a global perspective. Published monitoring data of PAHs present in foods at different study points across the world were reviewed and collected as their corresponding BaPeq concentrations. These BaPeq conce...

In this study, anaerobic hybrid membrane bioreactor (An-HMBR) was operated for the treatment of synthetic leachate combining suspended growth, attached growth system and membrane system integrated in single unit. The treatment efficiency was examined under different ratios of synthetic leachate along with enrichment feed. Ammonia nitrogen (NH4–N) r...

Serratia sp. strain SU.ISM.1 isolated from Noamundi iron ore mines for the first time and was observed for hexavalent chromium reduction and a growth kinetics modeling was applied for bacterial chromium reduction. For 4-8 ppm of hexavalent chromium concentration complete reduction was observed within 36 h when the selected isolate was applied, and...

The total concentrations of thirteen detected PAHs in different traffic soil samples of Dhanbad heavy mining area, India, were between 8.256 – 12.562 µg/g and were dominated by four ring PAHs (44%). Diagnostic ratio study revealed that fossil fuel burning and vehicular pollution are the most prominent sources of the PAHs in roadside soil even at a...

A new tripodal ligand [PO(NH²MePy)3] (L) (²MePy = 2-(4-methyl pyridyl)) have been synthesized by treating phosphorous oxychloride with 2-Amino-4-methylpyridine in toluene under refluxing condition. The ligand was appeared as a white solid and characterized by several standard analytical and spectroscopic techniques such as FT-IR, NMR (¹H, ¹³C(¹H) a...

A carcinogenic risk assessment of polycyclic aromatic hydrocarbons in soils and sediments was conducted using the probabilistic approach from a national perspective. Published monitoring data of polycyclic aromatic hydrocarbons present in soils and sediments at different study points across India were collected and converted to their corresponding...

Reactivity of chlorine towards hydrophobic groups present in natural organic matter (NOM) provokes the formation of carcinogenic disinfection byproducts such as trihalomethanes in chlorinated water. The present study aimed to investigate the variations in coagulant activity of alum using two different bioflocculants (coagulant aid) namely, Moringa...

The current study was carried out to assess and understand potential health risk and to examine the impact of 16 polycyclic aromatic hydrocarbons (PAHs) in Indian tandoori and tawa breads served in 8 different profile restaurants of Dhanbad city. Total PAH concentration in tandoori bread ranged between 113.36 and 211.19 µg/kg and for tawa bread bet...

Three new mononuclear square planar Ni(II) complexes, containing pincer type tridentate Schiff base ligands, having general formula [(NiL1(4-MePy)] (1), [(NiL1(2-AzNp)] (2), and [(NiL2(4-MePy)] (3) [where L1 = anion of N-(2-hydroxy-3-methoxybenzylidene) benzoylhydrazide (HL1), L2 = anion of N-(2-hydroxy-3-methoxybenzylidene) thiosemicarbazide (HL2)...

Significance and impact of the study: Polycyclic aromatic hydrocarbons (PAHs) are recognized as significant health risks and consequently listed as priority pollutants by environmental protection agencies across the globe. The aim of the present study was to degrade one of the important PAHs, anthracene, by a newly isolated Bacillus thuringiensis...

The role of preferential biodegradation in the reduction of cancer risk caused by polycyclic aromatic hydrocarbons (PAHs) has been studied. A consortium of microorganisms isolated from aged oil refinery exposed soil was used to degrade 13 PAHs content extracted from an urban traffic site soil. The biodegradation arranged in a batch process with a m...

An anthracene degrading bacterial consortium was isolated from soil collected from an oil refinery sludge polluted site near Haldia, India. Bushnell-Haas broth supplemented with anthracene as the sole carbon source was used for the degradation study. 51% degradation of anthracene was occurred in an incubation period of 7 days with a yield coefficie...

Present study was carried out to assess and understand potential health risk and to examine the impact of vehicular traffic on the contamination status of urban traffic soils in Dhanbad City with respect to polycyclic aromatic hydrocarbons (PAHs). Eight urban traffic sites and two control/rural site surface soils were analyzed and the contents of 1...

Herein, functionalized amylopectin and in-situ generated TiO2 and Au nanoparticles (NPs) based nanocomposite with excellent toxic organic dyes removal capacity, via synergistic effects of adsorption and photocatalytic degradation, along with enhanced antimicrobial activity, is reported. The TiO2 and TiO2-AuNPs incorporated nanocomposites (g-AP-pAA/...

Polycyclic aromatic hydrocarbons (PAHs) are added to the environment by the pyrolysis of petroleum at high temperatures as well as in acetylene synthesis from natural gas, refinery operations, etc. Anthracene is a PAH with a high pollution potential and health risk. It has been used as model substrate in studies on the environmental degradation of...

Chitin is the second most abundant natural polysaccharide after cellulose and is present in the crustacean exoskeleton, insects and fungi. The shell fish industry generates a huge amount of shell waste per processing which usually cause environmental nuisance. Alternatively this waste can be utilized as an economic source of chitin and its derivati...