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排序方式: 共有199条查询结果,搜索用时 78 毫秒
191.
Phasic utilization of substrates by aerobic cultures 总被引:1,自引:0,他引:1
192.
The objective of this study was to obtain information on the immobilization of beryllium (Be) in solid waste generated in the extraction process of beryllium from its ore, Beryl. This solid waste, termed red-mud, contains oxides of iron, aluminium, calcium, magnesium and beryllium. The red-mud waste contains beryllium at levels above the permissible limit, which prevents its disposal as solid waste. The total beryllium content in the red-mud analysed showed value ranging from 0.39 to 0.59% Be The studies showed that 50% of the total beryllium in red-mud can be extracted by water by repeated leaching over a period of 45 days. The cement mix, casting into cement blocks, was subjected to leachability studies over a period of 105 days and immobilization factor (IF factor) was determined. These IF values, of the order of 102, were compared with those obtained by performing leachability study on vitrified red-mud masses produced at different temperature conditions. Direct heating of the red-mud gave the gray coloured, non-transparent vitreous mass (as 'bad glass') showed effective immobilisation factor for beryllium in red-mud of the order of 10(4). 相似文献
193.
This paper, reports for the first time, an extensive study of alpha activity of all widely used building materials (plaster of Paris, stone chips, marble, white cement, mosaic stone, limestone, sand, granite, cement brick, asbestos, red brick, cement tile, ceramic tile and ceramics) in West Bengal, India. The alpha activities have been measured using Solid State Nuclear Track Detector (SSNTD), a very sensitive detector for alpha particles. The samples were collected from local markets of Kolkata. The measured average alpha activities ranged from 22.7+/-2.5 to 590.6+/-16.8Bqkg(-1). The alpha activity of ceramic tiles was highest and provides additional data to estimate the effect of environmental radiation exposure on human health. 相似文献
194.
Ghosh Soumya Al-Sharify Zainab T. Maleka Mathabatha Frank Onyeaka Helen Maleke Maleke Maolloum Alhaji Godoy Liliana Meskini Maryam Rami Mina Rezghi Ahmadi Shabnam Al-Najjar Shahad Z. Al-Sharify Noor T. Ahmed Sura M. Dehghani Mohammad Hadi 《Environmental science and pollution research international》2022,29(39):58628-58647
Environmental Science and Pollution Research - This current study review provides a brief review of a natural bee product known as propolis and its relevance toward combating SARS-CoV viruses.... 相似文献
195.
Sumita Ghosh 《Local Environment》2014,19(1):33-55
The growing interests in “local food” in recent years in public discussions, research and practice highlight its significant importance as a part of overall food system. This research compares spatially local food production potential of home gardens in nine residential neighbourhood case studies with varying physical densities at a local scale using geographic information systems and mathematical methods. This paper develops a “local food energy model” for measuring sustainability potential of growing local food mainly vegetables in the home gardens. The outcomes indicate that potential of the home gardens in supplying vegetables demand as a share of total dietary energy would depend on the morphological characteristics of urban forms, total resident population, total food demand and other related factors. Local food production in the home gardens could meaningfully contribute towards building a sustainable food future. 相似文献
196.
Oxidation of sulfide in aqueous solution by hydrogen peroxide was investigated in the presence of hydrated ferric oxide catalyst. The
ferric oxide catalyst was synthesized by sol gel technique from ferric chloride and ammonia. The synthesized catalyst was characterized
by Fourier transform infrared spectroscopy, X-Ray di raction analysis, scanning electrom microscope and energy dispersive X-ray
analysis. The catalyst was quite e ective in oxidizing the sulfide by hydrogen peroxide. The e ects of sulfide concentration, catalyst
loading, H2O2 dosing and temperature on the kinetics of sulfide oxidation were investigated. Kinetic equations and activation energies
for the catalytic oxidation reaction were calculated based on the experimental results. 相似文献
197.
Banerjee Srila Santra Bhaskar Kar Susmita Banerjee Dayita Ghosh Sourja Majumdar Swachchha 《Environmental science and pollution research international》2022,29(32):48620-48637
Environmental Science and Pollution Research - The present study evaluates the performance of an indigenously developed ceramic ultrafiltration (UF) membrane in a lab-scale membrane bioreactor... 相似文献
198.
Salih Suhaib S. Kadhom Mohammed Shihab Muayad A. Ghosh Tushar K. 《Journal of Polymers and the Environment》2022,30(10):4238-4251
Journal of Polymers and the Environment - Many industrial wastewaters are contaminated with both heavy metal ions and organic compounds, posing a major threat to public health and the ecosystem. In... 相似文献
199.
Paul Sangit Rahaman Manjur Ghosh Suman Kumar Katheria Ankur Das Tushar Kanti Patel Shailendra Das Narayan Ch 《Journal of Material Cycles and Waste Management》2023,25(3):1470-1481
Journal of Material Cycles and Waste Management - Thermal pyrolysis of waste tires is an industrially beneficial method for material and energy recovery. Pyrolytic carbon black (CBp) is considered... 相似文献