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排序方式: 共有48条查询结果,搜索用时 15 毫秒
1.
Guobin Shan Rao Y. Surampalli Rajeshwar D. Tyagi Tian C. Zhang 《Frontiers of Environmental Science & Engineering in China》2009,3(3):249-264
Nanomaterials are applicable in the areas of reduction of environmental burden, reduction/treatment of industrial and agricultural
wastes, and nonpoint source (NPS) pollution control. First, environmental burden reduction involves green process and engineering,
emissions control, desulfurization/denitrification of nonrenewable energy sources, and improvement of agriculture and food
systems. Second, reduction/treatment of industrial and agricultural wastes involves converting wastes into products, groundwater
remediation, adsorption, delaying photocatalysis, and nanomembranes. Third, NPS pollution control involves controlling water
pollution. Nanomaterials alter physical properties on a nanoscale due to their high specific surface area to volume ratio.
They are used as catalysts, adsorbents, membranes, and additives to increase activity and capability due to their high specific
surface areas and nano-sized effects. Thus, nanomaterials are more effective at treating environmental wastes because they
reduce the amount of material needed. 相似文献
2.
Satinder K. Brar Mausam Verma R.D. Tyagi R.Y. Surampalli 《Waste management (New York, N.Y.)》2010,30(3):504-520
Nanotechnology has widespread application in agricultural, environmental and industrial sectors ranging from fabrication of molecular assemblies to microbial array chips. Despite the booming application of nanotechnology, there have been serious implications which are coming into light in the recent years within different environmental compartments, namely air, water and soil and its likely impact on the human health. Health and environmental effects of common metals and materials are well-known, however, when the metals and materials take the form of nanoparticles – consequential hazards based on shape and size are yet to be explored. The nanoparticles released from different nanomaterials used in our household and industrial commodities find their way through waste disposal routes into the wastewater treatment facilities and end up in wastewater sludge. Further escape of these nanoparticles into the effluent will contaminate the aquatic and soil environment. Hence, an understanding of the presence, behavior and impact of these nanoparticles in wastewater and wastewater sludge is necessary and timely. Despite the lack of sufficient literature, the present review attempts to link various compartmentalization aspects of the nanoparticles, their physical properties and toxicity in wastewater and wastewater sludge through simile drawn from other environmental streams. 相似文献
3.
Bacterial leaching of metals from sewage sludge by indigenous iron-oxidizing bacteria 总被引:4,自引:0,他引:4
Bioleaching of metals can be achieved in sewage sludge using Thiobacillus ferrooxidans, which obtains its energy requirements from the oxidation of added ferrous iron. The purpose of this study was to verify the presence of indigenous T. ferroxidans and to evaluate their adaptive capacity and leaching potential. Nineteen sludges (primary, secondary, aerobically and anaerobically digested, oxidation pond) were tested and all of them contained indigenous iron-oxidizing bacteria. The acclimation of these organisms by successive transfers allowed a rise of sludge redox potential over 450 mV and a decrease of sludge pH between 3.8 and 2.2 over a 10-day incubation period. The metal solubilization efficiencies were Cd: 55-98%, Cr: 0-32%, Cu: 39-94%, Mn: 71-98%, Ni: 37-98%, Pb: 0-31% and Zn: 66-98%, were reached with these indigenous strains. The results obtained show that the metal bioleaching may be easily realized by direct acclimation of sludge microflora. 相似文献
4.
Singh Lok Pratap Dhaka Rahul Kumar Ali Dilshad Tyagi Inderjeet Sharma Usha Banavath Srinivasrao Naik 《Environmental science and pollution research international》2021,28(26):34087-34107
Environmental Science and Pollution Research - Nano-titania (n-TiO2), due to its unique photocatalytic and hydrophobic properties, can be used to prepare self-cleaning cement-based smart building... 相似文献
5.
Abid Ali Khan Rubia Zahid Gaur V.K. Tyagi Anwar Khursheed Beni Lew Indu Mehrotra A.A. Kazmi 《Resources, Conservation and Recycling》2011,55(12):1232-1251
The upflow anaerobic sludge blanket (UASB) process is reported to be a sustainable technology for domestic wastewaters treatment in developing countries and for small communities. However, the inability of UASB process to meet the desired disposal standards has given enough impetus for subsequent post treatment. In order to upgrade the UASB based sewage treatment plants (STPs) to achieve desired effluent quality for disposal or for reuse, various technological options are available and broadly differentiated as primary post-treatment for the removal of organic and inorganic compounds and suspended matter; secondary post-treatment for the removal of hardly degradable soluble matter, colloidal and nutrients; and polishing systems for removals of pathogens. Hence, this paper discusses the different systems for the treatment of UASB reactor effluent treating sewage. Additionally, a comparative review, an economic evaluation of some of the emerging options was conducted and based on the extensive review of different integrated combination, i.e. UASB-different aerobic systems, a treatment concept based on natural biological mineralization route recognized as an advanced technology to meet all practical aspects to make it a sustainable for environmental protection, resource preservation and recovering maximum resources. 相似文献
6.
Ruhela Mukesh Sharma Kaberi Bhutiani Rakesh Chandniha Surendra Kumar Kumar Vikas Tyagi Kaomud Ahamad Faheem Tyagi Inderjeet 《Environmental science and pollution research international》2022,29(21):31486-31500
Environmental Science and Pollution Research - Mining is a significant part of the transforming economy, which is generally considered as essential as well as social evil at the same time. It is... 相似文献
7.
Adama Ndao Lalit R Kumar Rajeshwar. D. Tyagi Jose Valéro 《Journal of environmental science and health. Part. B》2020,55(2):115-126
AbstractThe aim of this study was to produce Bacillus thuringiensis-based biopesticide using starch-producing industry wastewater (SIW) fortified with soybean medium and optimize the formulated product using different adjuvants. This study was necessary as low endotoxin concentration is obtained in formulated biopesticide when SIW alone is used as fermentation medium. The fermentation runs were conducted using SIW alone and SIW fortified with 25% soybean (w/v) medium in 2000?L and 150?L bioreactor, respectively. SIW supplemented with soybean medium showed an increase in cell count (from 1.95?×?108 to 1.65?×?109 CFU mL–1), spore synthesis (from 1.5?×?108 to 1.35?×?109 CFU mL–1) and endotoxin concentration (from 436 to 1170?μg mL–1) when compared to SIW medium alone. The fermented broth was concentrated using continuous centrifugation and adjuvants were added for biopesticide formulation in order to enhance its resistance against UV rays and rainfastness. Entomotoxicity of the formulation produced using fermented broth of SIW fortified with soybean (38,000?IU μL–1) was higher than that obtained by SIW medium alone (21,000?IU μL–1), commercial biopesticide Foray 76B (20,000?IU μL–1) and Btk sander’s (12,500?IU μL–1). 相似文献
8.
Memetova Anastasia Tyagi Inderjeet Suhas Singh Pratibha Mkrtchyan Elina Burakova Irina Burakov Alexander Memetov Nariman Gerasimova Alena Shigabaeva Gulnara Galunin Evgeny Kumar Ajay 《Environmental science and pollution research international》2023,30(9):22617-22630
Environmental Science and Pollution Research - Carbon porous materials obtained through KOH activation of a furfural?+?hydroquinone?+?urotropine mixture were applied as... 相似文献
9.
Sustainable technologies for on-site domestic wastewater treatment: a review with technical approach
Sharma Meena Kumari Tyagi Vinay Kumar Singh Nitin Kumar Singh Surya Pratap Kazmi Absar Ahmad 《Environment, Development and Sustainability》2022,24(3):3039-3090
Environment, Development and Sustainability - The rapid population growth has rendered the centralized sewerage systems a non-realistic option in sparsely populated areas, particularly in... 相似文献
10.
Fragrance materials are widely present in the environment, such as air, water, and soil. Concerns have been raised due to the increasing utilization and suspected impact on human health. The bioaccumulating property is considered as one of the causes of the toxicity to human beings. The removal of fragrance materials from environmental sinks has not been paid enough attention due to the lack of regulation and research on their toxicity. This paper provides systematic information on how fragrance materials are transferred to the environment, how do they affect human lives, and what is their fate in water, wastewater, wastewater sludge, and soil. 相似文献