NOPR Collection:http://nopr.niscpr.res.in/handle/123456789/622762026-10-11T22:15:58Z2026-10-11T22:15:58ZGraphene-based nanocomposites: An efficient detoxification agent for heavy metal removal from wastewaterVerma, SanjeevVerma, ShivaniDas, TapasVerma, Bhawnahttp://nopr.niscpr.res.in/handle/123456789/622922023-07-11T05:48:31Z2023-07-01T00:00:00ZTitle: Graphene-based nanocomposites: An efficient detoxification agent for heavy metal removal from wastewater
Authors: Verma, Sanjeev; Verma, Shivani; Das, Tapas; Verma, Bhawna
Abstract: Numerous scientific and technological developments in wastewater treatment procedures are brought on by the shortage
of clean water supplies. Heavy metals' recalcitrance in wastewater has been shown to be a difficult issue. Further, drinking
water quality must be at its highest for human health to be at its best; nevertheless, a number of human activities are
continuously degrading it, which has an effect on human health either directly or indirectly. Because heavy metals are the
primary causes of many chronic illnesses and have a tendency to bio accumulate, they are giving rise to a lot of worries.
Technologies from all over the world are being developed to address the demand for clean drinking water. The objective of
the current study is to raise awareness of the need to remove dangerous dense metals from various types of wastewater and
the application of modified graphene nanocomposite for their adsorption-based removal. Graphene-based nanocomposite
materials have been picked for this application due to their large surface area, superior mechanical strength, and reactivity
towards polar and nonpolar contaminants for the electrostatic emission of the heavy metal ions arsenic (As), chromium (Cr),
copper (Cu), and lead (Pb).
Page(s): 411-4222023-07-01T00:00:00ZApplications of carbon nanotubes in energy storage devicesKanagamani, KGeethamani, PMuthukrishnan, Phttp://nopr.niscpr.res.in/handle/123456789/622912023-07-11T05:46:40Z2023-07-01T00:00:00ZTitle: Applications of carbon nanotubes in energy storage devices
Authors: Kanagamani, K; Geethamani, P; Muthukrishnan, P
Abstract: The development of carbon nanotubes (CNTs) has contributed to the advancement in science and technology. If CNTs
could be properly engineered, they can pave the way for the future development of numerous additional materials for a
variety of purposes. The open and enriched chiral structure of CNTs enabled improvements in the properties and
performances of other materials, when CNTs are incorporated in them. Depending on the structural and morphological
requirements, CNTs have been incorporated in energy storage systems either as an additive to improve the electronic
conductivity of cathode materials or as an active anode component. Furthermore, they have also been used directly as the
electrode material in supercapacitors and fuel cells. Therefore, demand for CNTs is increasing due to their underlying
properties and prospective applications in the energy storage research fields. Different types of CNTs are used in energy
storage devices such as batteries, supercapacitors, fuel cells, and other devices. This chapter focuses on the review of CNTs
in various energy conversion and storage systems, how their morphology and structure affect the electrochemical
capabilities and energy storage methods.
Page(s): 423-4292023-07-01T00:00:00ZChlorella biomass as a potential source of algal oil: Investigations on optimization of ultrasonic assisted extraction, kinetics and characterization of algal oilDevi, TPravin, RBaskar, Ghttp://nopr.niscpr.res.in/handle/123456789/622902023-07-11T05:45:12Z2023-07-01T00:00:00ZTitle: Chlorella biomass as a potential source of algal oil: Investigations on optimization of ultrasonic assisted extraction, kinetics and characterization of algal oil
Authors: Devi, T; Pravin, R; Baskar, G
Abstract: The creation of renewable and affordable alternative energy is required due to the growing need for sustainable energy.
In this present research work, algal oil has been extracted from microalgae biomass of Chlorella vulgaris using the Soxhlet
apparatus. The algal biomass is ultrasonically pretreated to disrupt the cell walls of Chlorella sp. A total of five
homogeneous solvent extractions are performed. As a result, the use of chloroform and isopropanol showed higher algal oil
yields of 10.8% and 9.1%, respectively. Therefore, heterogeneous solvent approaches have been used in different volume
ratios (5:1 to 1:5) to improve the yield of algal oil. Accordingly, the findings demonstrated that as compared to
homogeneous solvents, the use of heterogeneous solvents shows better yield of algal oil from Chlorella sp. biomass. A
maximum bio-oil yield of 12.3% was obtained using chloroform and isopropanol at a ratio of 3:3. To improve the extraction
yields of algal oil, various parameters were optimized. The optimized parameters include 20 min of ultrasonication time, 3:1
ratio of solvent to biomass, temperature of 50℃, and an extraction period of 90 min. Further, extracted algal oil is
characterised using GC-MS, and the results shows the presence of octadecanoic acid in the extracted algal oil. GC-MS
analysis of the extracted edalgal oil has shown the suitability of the oil for transesterification reaction for the production of
fatty acid methyl esters.
Page(s): 430-4342023-07-01T00:00:00ZAntibacterial property of synthetic upper leather treated by garlic and ginger peels extractsWodag, Awoke FentaTadesse, Befikadubiresaw, TewachewDessale, TewodrosAhmed, Fitsum EtefaKebede, Zerihun Teshomehttp://nopr.niscpr.res.in/handle/123456789/622892023-07-11T05:43:22Z2023-07-01T00:00:00ZTitle: Antibacterial property of synthetic upper leather treated by garlic and ginger peels extracts
Authors: Wodag, Awoke Fenta; Tadesse, Befikadu; biresaw, Tewachew; Dessale, Tewodros; Ahmed, Fitsum Etefa; Kebede, Zerihun Teshome
Abstract: The garlic and ginger peels have been thrown as a waste. Nowadays researchers have been trying to investigate the
antimicrobial properties of garlic and ginger peels extracts. Nevertheless, the effects of these materials on synthetic leather have
not been experimented. The study aims at antimicrobial treatment of synthetic leather by the peels extracts and examining it
against the staphylococcus epidermis bacterium. The peels have been collected in Bahir Dar city, Ethiopia, dried in the oven for
one hour at 104°C, weighed and grounded in a grinder with a mesh size of 50-300 mesh. For both materials, 40 g of peel
powder has been dissolved in 400 mL of ethanol solvent and stirred by a magnetic stirrer and then extracted by ultrasonic
extraction method. Leather samples have been treated by extracted peels (5%, 15% and 20%) together with citric acid as a
binder and soap as wetting agent. The antimicrobial properties of the treated samples have been assessed by a disc diffusion test
method. The garlic peel extract at all concentrations levels has a wider inhibition zone indicating that garlic peel extract is more
efficient at inhibiting Staphylococcus epidermis growth than ginger peel. Therefore; it could be used as antimicrobial
treatment of synthetic leather.
Page(s): 435-4402023-07-01T00:00:00Z