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31.
Pradhan Ananta Man Singh Kim Yun-Tae Shrestha Suchita Huynh Thanh-Canh Nguyen Ba-Phu 《Environmental science and pollution research international》2021,28(15):18501-18517
Environmental Science and Pollution Research - This study aims to capture groundwater potential zones integrating deep neural network and groundwater influencing factors. The present work was... 相似文献
32.
Pradhan Piasy Karan Poulami Chakraborty Rajat 《Environmental science and pollution research international》2022,29(14):20064-20077
Environmental Science and Pollution Research - The present work encompasses the production of biodiesel from an inexpensive waste, viz., used rice bran oil (URBO) through concurrent esterification... 相似文献
33.
K. Dhineka M. Sambandam S. K. Sivadas T. Kaviarasan Umakanta Pradhan Mehmuna Begum Pravakar Mishra M. V. Ramana Murthy 《Frontiers of Environmental Science & Engineering》2022,16(1):10
34.
Sandeep PANDA Nilotpala PRADHAN Umaballav MOHAPATRA Sandeep K. PANDA Swagat S. RATH Danda S. RAO Bansi D. NAYAK Lala B. SUKLA Barada K. MISHRA 《Frontiers of Environmental Science & Engineering》2013,7(2):281-293
Bioleaching of a low grade chalcopyrite (ball mill spillage material) was tested for copper recovery in shake flasks. The original samples (as received) were thermally activated (600°C, 30 min) to notice the change in physico-chemical and mineralogical characteristics of the host rock and subsequently its effect on copper recovery. A mixed culture of acidophilic chemolithotrophic bacterial consortium predominantly entailing Acidithiobacillus ferrooxidans strain was used for bioleaching studies and optimization of process parameters of both original and thermally activated samples. Mineralogical characterization studies indicated the presence of chalcopyrite, pyrite in the silicate matrix of the granitic rock. Field emission scanning electron microscopy coupled with Energy dispersive spectroscopy (FESEM-EDS) and X-ray Fluorescence (XRF) analysis indicated mostly SiO2. With pH 2, pulp density 10% w/v, inoculum 10% v/v, temperature 30°C, 150 r·min-1, 49% copper could be recovered in 30 days from the finest particle size (-1+ 0.75 mm) of the original spillage sample. Under similar conditions 95% copper could be recovered from the thermally activated sample with the same size fraction in 10 days. The study revealed that thermal activation leads to volume expansion in the rock with the development of cracks, micro and macro pores on its surface, thereby enabling bacterial solution to penetrate more easily into the body, facilitating enhanced copper dissolution. 相似文献
35.
Fraser syndrome (OMIM 219000) is a rare, autosomal recessive disorder characterized by cryptophthalmos, cutanaeous syndactyly, malformations of the larynx and genitourinary tract, craniofacial dysmorphism, orofacial clefting, mental retardation and musculoskeletal anomalies. There is marked interfamilial clinical heterogeneity. However, there is strong phenotypic similarity and concordance of the degree of severity of the disease within a family. We report a family with two cases of Fraser syndrome with marked clinical heterogeneity. One case had lethal phenotype with bilateral renal agenesis, while the other had mild phenotype with normal kidneys. It has not been reported before and highlights the importance of careful screening of pregnancies in families with Fraser syndrome. Copyright © 2007 John Wiley & Sons, Ltd. 相似文献
36.
Soil erosion assessment and its correlation with landslide events using remote sensing data and GIS: a case study at Penang Island,Malaysia 总被引:8,自引:0,他引:8
Pradhan B Chaudhari A Adinarayana J Buchroithner MF 《Environmental monitoring and assessment》2012,184(2):715-727
In this paper, an attempt has been made to assess, prognosis and observe dynamism of soil erosion by universal soil loss equation
(USLE) method at Penang Island, Malaysia. Multi-source (map-, space- and ground-based) datasets were used to obtain both static
and dynamic factors of USLE, and an integrated analysis was carried out in raster format of GIS. A landslide location map
was generated on the basis of image elements interpretation from aerial photos, satellite data and field observations and
was used to validate soil erosion intensity in the study area. Further, a statistical-based frequency ratio analysis was carried
out in the study area for correlation purposes. The results of the statistical correlation showed a satisfactory agreement
between the prepared USLE-based soil erosion map and landslide events/locations, and are directly proportional to each other.
Prognosis analysis on soil erosion helps the user agencies/decision makers to design proper conservation planning program
to reduce soil erosion. Temporal statistics on soil erosion in these dynamic and rapid developments in Penang Island indicate
the co-existence and balance of ecosystem. 相似文献
37.
Eco-sanitation and its benefits: an experimental demonstration program to raise awareness in central Nepal 总被引:1,自引:0,他引:1
Surendra K. Pradhan Ram Chandra Piya Helvi Heinonen-Tanski 《Environment, Development and Sustainability》2011,13(3):507-518
This study focuses on awareness and an experimental demonstration about the use of human urine and wood ash as a fertilizer.
This study was conducted in Chanauta, central Nepal, from November 2009 to February 2010. The villagers (N = 27) were asked about their awareness of eco-sanitation and fertilizer value of urine and ash. All the participants agreed
that the use of urine and ash was a good idea. In the experimental study, the fertilizer value of urine+ash was compared with
animal manure and no-fertilizer in the cultivation of radish, potato, broadleaf mustard, cauliflower, and cabbage. Different
plants cultivated plots received 54–81 kgN/ha with urine+ash or manure fertilizer. The urine+ash fertilizer produced significantly
(p < 0.05) higher broadleaf mustard biomass than obtained from animal manure and without fertilization. Urine+ash-fertilized
plots growing radish, potato, cauliflower, and cabbage produced similar or slightly higher yields biomass compared to those
achieved with manure fertilization. This might be because of high P, K as well as greater availability of N in applied urine
compared to manure. It is concluded that urine+ash fertilizer can be used instead of animal manure; in this study, a dose
of 4 L of urine was equal to 1 kg of dry cattle manure and produced a similar or greater yield of vegetable biomass than manure
fertilization. To be able to generalize this conclusion, it is important to conduct these kinds of experiments with different
seasonal crops and in other parts of the world. 相似文献
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39.
Wastewater contains varieties of carbonaceous and nitrogenous compounds that undergo complicated biodegradation processes in wastewater treatment plants. How these different compounds are degraded by activated sludge in aerobic conditions is still a mystery. Researchers have been trying to interpret it using the oxygen uptake rate (OUR) derived from the respirograms of respective substrates. Several models have been proposed to interpret the substrate removal mechanisms using the experimental observations. Have we succeeded in understanding the messages by activated sludge correctly using these models? In this paper, the distinctive nature of the respirograms when activated sludge is fed with different substrates and the biokinetic models that have been developed to explain the substrate removal mechanisms using derived OUR profiles are reviewed. In addition, a sensitivity study was conducted on the recently evolved simultaneous storage and growth model to investigate the influence of key parameters on OUR profiles during the biodegradation process. 相似文献
40.
Pradhan Arijit Arif Md. Reyaz Afzal Mohammad Saud Gazi Ainal Hoque 《Environmental Fluid Mechanics》2022,22(6):1307-1331
Environmental Fluid Mechanics - An analysis of forces for flow around an elliptic cylinder at low Reynolds number has been presented in this work. The finite-volume based open source code OpenFOAM... 相似文献