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Environment, Development and Sustainability - Public open spaces (POSs) provide a forum for social gathering, health, leisure, and recreation opportunities for city dwellers. POSs are considered... 相似文献
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To use stabilized nanoparticles(NPs) in water as disinfectants over a very long period, the amount of coating agent(for NP stabilization) needs to be optimized. To this end, silver nanoparticles(Ag-NPs) with two different coating densities of tri-sodium citrate(12.05 and46.17 molecules/nm~2, respectively), yet of very similar particle size(29 and 27 nm, respectively)were synthesized. Both sets of citrate capped NPs were then separately impregnated on plasma treated activated carbon(AC), with similar Ag loading of 0.8 and 0.82 wt.%, respectively. On passing contaminated water(containing 10~4 CFU Escherichia coli/m L of water) through a continuous flow-column packed with Ag/AC, zero cell concentration was achieved in 22 and 39 min, with Ag-NPs(impregnated on AC, named as Ag/AC) having lower and higher coating density, respectively. Therefore, even on ensuring similar Ag-NP size and loading, there is a significant difference in antibacterial performance based on citrate coating density in Ag/AC.This is observed in lower coating density case, due to both:(i) higher Ag~+ ion release from Ag-NP and(ii) stronger binding of individual Ag-NPs on AC. The latter ensures that, Ag-NP does not detach from the AC surface for a long duration. TGA-DSC shows that Ag-NPs with a low coating density bind to AC with 4.55 times higher adsorption energy, compared to Ag/AC with a high coating density, implying stronger binding. Therefore, coating density is an important parameter for achieving higher antibacterial efficacy, translating into a faster decontamination rate in experiments, over a long period of flow-column operation. 相似文献
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Giles DE Mohapatra M Issa TB Anand S Singh P 《Journal of environmental management》2011,92(12):3011-3022
Arsenic is a commonly occurring toxic metal in natural systems and is the root cause of many diseases and disorders. Occurrence of arsenic contaminated water is reported from several countries all over the world. A great deal of research over recent decades has been motivated by the requirement to lower the concentration of arsenic in drinking water and the need to develop low cost techniques which can be widely applied for arsenic removal from contaminated water. This review briefly presents iron and aluminium based adsorbents for arsenic removal. Studies carried out on oxidation of arsenic(III) to arsenic(V) employing various oxidising agents to facilitate arsenic removal are briefly mentioned. Effects of competing ions, As:Fe ratios, arsenic(V) vs. arsenic(III) removal using ferrihydrite as the adsorbent have been discussed. Recent efforts made for investigating arsenic adsorption on iron hydroxides/oxyhydroxides/oxides such as granular ferric hydroxide, goethite, akaganeite, magnetite and haematite have been reviewed. The adsorption behaviours of activated alumina, gibbsite, bauxite, activated bauxite, layered double hydroxides are discussed. Point-of-use adsorptive remediation methods indicate that Sono Arsenic filter and Kanchan™ Arsenic filter are in operation at various locations of Bangladesh and Nepal. The relative merits and demerits of such filters have been discussed. Evaluation of kits used for at-site arsenic estimation by various researchers also forms a part of this review. 相似文献
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Bhatia Saurabh Al-Harrasi Ahmed Behl Tapan Anwer Md. Khalid Ahmed Mohammed Muqtader Mittal Vineet Kaushik Deepak Chigurupati Sridevi Kabir Md. Tanvir Sharma Pritam Babu Chaugule Bhupal Vargas-de-la-Cruz Celia 《Environmental science and pollution research international》2022,29(10):14380-14392
Environmental Science and Pollution Research - Several studies have suggested the direct relationship between skin complications, air pollution, and UV irradiation. UVB radiations cause various... 相似文献
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Growth and yield response of marigold to potting media containing vermicompost produced from different wastes 总被引:1,自引:0,他引:1
Investigations were made to assay the influence of vermicomposts, prepared from (i) cow dung (CD) and (ii) sugar mill wastewater
treatment plant sludge spiked with horse dung, on the growth and productivity of marigold plants in pot culture experiments.
The soil was used as potting media, and vermicomposts were amended with it in 10, 20, 30 and 40% ratio. A total of nine different
potting media were prepared. The fertility status of soil and vermicomposts was quantified. There were significant differences
in the fertilizer quality of soil and both the vermicomposts. Maximum numbers of flowers was produced in the potting media
containing 30% of CD vermicompost and minimum was reported in control (soil without amendments). The diameter of biggest flower
was reported in the potting media containing 40% of sugar mill wastewater treatment plant sludge vermicompost. Results showed
that the addition of vermicompost, in appropriate quantities, to potting media has synergistic effects on growth and flowering
of plants including number of buds, number of flowers, plant shoot biomass, root biomass, plant height and diameter of flowers. 相似文献
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Chopade Rushikesh L. Pandit Pritam P. Nagar Varad Aseri Vinay Mavry Badal Sharma Anuj Singh Apoorva Verma Rohit Kumar Awasthi Garima Awasthi Kumud Kant Sankhla Mahipal Singh 《Environmental science and pollution research international》2023,30(5):11199-11209
Environmental Science and Pollution Research - The identification of harmful metal ions in aquatic environments is a global concern since these contaminants can have serious consequences for... 相似文献
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Sarika Pritam 《毒物与环境化学》2013,95(1):13-19
The article presents the reduced use of toxicologically critical solvents for the extraction and clean-up of a neo-nicotinoid pesticide, acetamiprid from vegetables. Acetamiprid was extracted from spiked vegetable samples of cabbage by the use of different techniques like microwave-assisted extraction (MWAE), sonication and by the conventional method of homogenization. The study revealed that though higher percent recoveries of 78–92 were obtained in the blending method, solvent use was high as compared to MWAE. In MWAE, the percent recoveries recorded were in the range of 46–89 depending upon the solvent used and power employed. A mixture of methanol–water and methanol–acetone at 400 W power levels gave percent recoveries of 72 and 82, respectively, as compared to solvent mixtures, namely, acetone–hexane and acetone–hexane–water, which recorded recoveries of 49 and 67%. The study indicates that the choice of solvent and power employed plays a significant role in MWAE for enhanced recoveries. 相似文献
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Das Pritam Velayudhan Parvathy Chandramohan 《Environmental science and pollution research international》2022,29(46):69367-69387
Environmental Science and Pollution Research - Solar chimney power plant (SCPP) is one of the promising technologies to convert solar energy into carbon-free power generation. It has cost... 相似文献
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Chandana Aggarapu Mallick Sarada Prasanna Dikshit Pritam Kumar Singh Bhisham Narayan Sahi Ajay Kumar 《Journal of Polymers and the Environment》2022,30(10):4040-4067
Journal of Polymers and the Environment - Cellulose, the most abundant polysaccharide on earth, can be obtained from various sources including the cell wall of plants and woods, bacteria, algae,... 相似文献
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