Kumar Suranjit Prasad

University of Allahabad · Centre of Environmental Studies

In the present study, chitosan functionalized mesoporous silica nanoparticles have been synthesized. Chitosan derived from an edible mushroom, Agaricus bisporus was used during synthesis of chitosan functionalized silica nanoparticles. The functionalized silica nanoparticles were subjected to fluoride sorption using a batch method which subsequentl...

In recent years, researches on selenium nanoparticle have gained more attention due to its important role in many physiological processes. Generally, selenium nanoparticle has a high level of absorption in regular supplementation comparative to selenium. Therefore it is all-important to develop new techniques to elevate the transportation of seleni...

Microbial infections are frequently occurring worldwide due to the presence of antibiotic-resistant genes in the environment. Antibiotics are becoming ineffective in the treatment of diseases due to the resistance in bacterial pathogens against these drugs. Recently, there is an incredible challenge for researchers and medical professionals in the...

Iron-modified biochar was prepared using woody biomass of Tectona grandis Linn f. for the removal of tetracycline from an aqueous solution. The prepared biochar was characterized by Fourier transformed infra-red spectroscopy, Scanning electron microscope, and X-ray photoelectron spectroscopy. The FTIR results showed predominant peaks that confirm t...

This study explored the combined treatment approach to facilitate the treatment of tannery wastewater through Fenton's reagents and batch adsorption method, which involved the use of low-cost wood biochar. Low-cost adsorbent obtained from thermal conversion of wood biomass (Callistemon citrinus) modified with nano-MgO. Scanning Electron Microscopy,...

In the present study, the thermal conversion of Arachis hypogaea (groundnut) husk into biochar and its subsequent application in the adsorptive removal of Cr(VI) from an aqueous solution has been studied. The SEM–EDX and LIBS analyses showed that the adsorbent material incorporates both magnesium (Mg) and chromium (Cr) on its surface. The FTIR spec...

The river water quality index (RWQI) of the upper Ganga canal has been computed to assess the effect of lockdown and unlock phases lead down by COVID-19 in India. Geospatial distribution of RWQI from January 2019 to December 2021 in the study area revealed significant impacts of lockdown on water quality. However, unlock phases (post lockdown) have...

In this study, unmodified and modified wood biochar of Neolamarckia cadamba was used as an adsorbent for the removal of hexavalent chromium from an aqueous solution. The biochar material was characterized by different analytical techniques like SEM, BET-N2, FT-IR, and LIBS. The EDX and recorded LIBS spectra demonstrated a fingerprint of the element...

The tannery industry influences the gross domestic product/economic activity of any country, but the uncontrolled release of tannery effluents causes environmental degradation and increases health risks to human. The reason for the toxicity of tannery effluents is the presence of high concentrations of organic and inorganic chemicals used in the pr...

Sorptive removal is seen as a viable option to remove dissolved ions from an aqueous solution. The study reports the use of leaf extract of Ocimum sanctum L. (Tulsi) for nano-size iron preparation. Prepared particles were entrapment into calcium alginate- κ-carrageenan beads acting as adsorbents for arsenic ions. Further, characterization of iron p...

Antibiotic traces in household and industrial effluents have a harmful influence on the ecosystem as well as on human health. Antibiotic resistance in microorganisms arises because of inadequate antibiotic removal by conventional treatment processes.This study investigatesthe sorption of ciprofloxacin (CF) and doxycycline(DC) antibiotics, from an a...

Safe drinking water is a key ingredient to a sustainable life for mankind. Fluoride is considered a micronutrient required in a minute quantity for the proper functioning of bones and teeth in humans. However, its higher concentration could lead to toxic effects on skeletal and dental health. The amount of fluoride required can be easily achieved t...

In the current investigation, the distribution and extent of human exposure of phthalate esters (PAEs) have been reported on global extent based on computed indices. The proposed indices were calculated based on environmental concentrations, toxicity, occurrence, environmental fate, and transport of PAEs. The cumulative phthalate exposure index (PE...

The occurrence of high concentrations of arsenic and fluoride in drinking water has become a serious environmental issue. The present study reports a novel adsorbent, L-Arg functionalized silica micro-particles and its effectiveness for the simultaneous removal of arsenite, arsenate, and fluoride ions in aqueous solution. Batch adsorption experimen...

Fluorosis due to consuming an elevated amount of fluoride-containing groundwater is believed to be a serious public health-related issue. A calcium pretreated wood of Pinus roxburghii was converted into biochar and examined for fluoride uptake from an aqueous solution. Further characterization of biochar was performed using FT-IR and SEM EDAX analy...

Selenium is essential for human, plant, and animal growth and reproduction. Because of their biological activity, bioavailability, and low toxicity, selenium nanoparticles are regarded as a promising material for many applications in biomedicine and health. Selenium-resistant bacteria were isolated from garden soil and identified as Citrobacter ama...

The potential of leaching Bisphenol-A (BPA) from plastic baby feeding bottles, aluminum cans, and thermal printed receipts was investigated under the aquatic condition at high temperatures. BPA is often used to manufacture cross-linked epoxy resin to coat food cans to prevent direct contact with metals and plastic materials. BPA leached from consum...

Arsenicosis, due to consumption of an elevated amount of arsenic‐containing groundwater is a serious issue related to human health. The ubiquitous nature of arsenic is also a part of agricultural soil solution and its uptake by edible plants imposes a considerable human health risk. A calcium pretreated wood of Moringa oleifera was pyrolyzed and co...

The present study reports a benign approach to prepare citrate capped iron particles using juice of a lemon fruit. Resultant particles were subjected to detailed adsorption studies for removal of arsenite aqueous solution of defined concentration. The planer reflection of XRD analysis suggested that iron particles were crystalline in nature. FT-IR...

The pandemic of coronavirus disease 2019 (COVID-19) caused by the severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) has affected millions of people and claimed thousands of lives. Starting in China, it is arguably the most precipitous global health calamity of modern times. The entire world has rocked back to fight against the disease an...

In this research study, a new bio adsorbent has been developed by synthesis of zirconium nanoparticles using Zingiber officinale rhizome extract and its subsequent entrapment in calcium alginate-carrageenin hydro gel beads. The characterisation of synthesised nanoparticles were carried out using SEM, TEM, SAED, EDAX and FT-IR. The resulting Zr-algi...

Selenium is a nutrient element essential for the growth and reproduction of plants and animals. Generally, selenium nanoparticle has a high level of absorption in regular supplementation comparative to selenium. In this study, selenium nanoparticles have been synthesized using a cell-free extract of Geobacillus as a reducing and stabilizing agent....

In the present research work, removal of fluoride from aqueous solution using fenugreek leaf mediated Zr nanoparticle entrapped in calcium alginate beads has been attempted. The adsorption study for removal of fluoride from aqueous solution of defined concentrations has been carried out in batch mode followed by its estimation using ion-chromatogra...

In the present research work, batch adsorption study was carried out to optimize the fluoride removal capacity of guar gum hydrogel beads from aqueous solution. The adsorption capacity was found to be 71.2 mg/g. The FTIR spectrum revealed the presence of functional groups that might be involved in fluoride adsorption. Adsorption of fluoride onto...

Biosynthesis is an eloquent, safe, biocompatible, eco-friendly, and recyclable way of preparing selenium nanoparticles (SeNPs). Selenium occurs in multiple oxidation states, for example, +6, +4, 0, or −2. Selenium (Se) is an essential trace element with a very narrow margin between the lowest acceptable levels of intake and toxicity. Selenium is an...

Arsenic is a metalloid which poses a risk on water quality, a severe health problem for human and serious impact on environment. Occurrence of arsenic in natural environment may be due to natural processes or due to anthropogenic activities. Removal of arsenic can be done by many different techniques like adsorption, precipitation, flotation, ion e...

The cell-free extract, a crude enzyme (cytosolic and membrane fraction) obtained from an environmental isolate, Bacillus pumilus sp. BAB-3706 worked as excellent in reducing as well as stabilizing agent and facilitated the formation of stable colloidal selenium nanoparticles (SeNPs). Resulting nanoparticles were characterized using UV-vis spectroph...

The extract of the Asparagus racemosus leaf tissue works as a stabilizing and capping agent and assists the formation of stable colloidal nanoparticles. Nanoparticles were characterized using UV-vis spectrophotometer, photoluminescence, TEM, EDAX and XRD, respectively. Transmission electron microscopy followed by selected area electron diffraction...

This study repots a novel method of preparation of water soluble CdS nanoparticles using a plant, Asparagus racemosus leaf extract. The extract of the leaf tissue which worked as a stabilizing and capping agent, assisted the formation of nanoparticles. Nanoparticles were characterized using UV-vis spectrophotometer, Photoluminescence, TEM, EDAX, XR...

A bioreductive capacity of a plant, Terminalia arjuna leaf extract, was utilized for preparation of selenium nanoparticles. The leaf extract worked as good capping as well as stabilizing agent and facilitated the formation of stable colloidal nanoparticles. Resulting nanoparticles were characterized using UV-Vis spectrophotometer, transmission elec...

In this study we investigated the role of arsenic-resistant bacteria Arthrobacter sp. biomass for removal of arsenite as well as arsenate from aqueous solution. The biomass sorption characteristics were studied as a function of biomass dose, contact time and pH. Langmuir, Freundlich and Dubinin-Radushkevich (D-R) models were applied to describe the...

This paper reports, an environmentally benign procedure of synthesis and characterizations of selenium nanoparticles and their protective effect against UV-induced DNA damage activities. An aqueous leaf extract of lemon plant was used as a precursor for synthesis of colloidal selenium nanoparticles. Resulting nanoparticles were characterized using...

The antimicrobial activity of silver nanoparticles with the clinically important microbes is a major area of research in the field of nanobiotechnology. Syzgium cumini (L.) is used as medicinal plant for anti-diabetic property. The leaves and bark are used for controlling blood pressure and gingivitis. In this present study, we have synthesized sil...

Vegetable fields of sub-urban areas of Vadodara district, Gujarat, continue to receive the large amounts of extraneous heavy metals due to rapid urbanization and industrialization. A study was conducted to analyze the accumulated concentration of heavy metal contents in pea (Pisum sativum), lady's finger (Abelmoschus esculentus) and carrot (Daucus...

This Letter is a novel approach to synthesise a bio-functionalised selenium nanoparticles using cell-free extract of selenium-resistant bacterial isolate. Phylogenetic analysis of isolate suggested its close similarity with Microbacterium luteolum (Y17235.1) and Microbacterium oxydans str. TPL09 (EU373379.1) while it was distantly related to Microb...

A green synthesis of silver nanoparticle was carried out using tobacco leaf extract. Synthesized nanoparticles were characterized using UV-Vis absorption spectroscopy, TEM, EDAX, FT-IR and photoluminescence study, respectively. UV-Vis absorption spectroscopy of prepared silver colloidal solution showed absorption maxima at 418 nm. Excitation maximu...

Biomass obtained from arsenic resistant gram positive bacteria Rhodococcus sp. WB-12 was studied for the removal of arsenite from aqueous solution. The biomass sorption characteristic was investigated as a function of biomass doses, contact time, and pH. The Langmiur Freundlich, and Dubinin-Radushkevich (D-R) models were applied to describe the bio...

The chemolithoautotroph, Arthrobacter sp.15b oxidizes arsenite to arsenate using a membrane bound arsenite oxidase. The enzyme arsenite oxidase is purified to its homogeneity and identified using MALDI-TOF MS analysis. Upon further characterization, it was observed that the enzyme is a heterodimer showing native molecular mass as approximately 100...