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排序方式: 共有115条查询结果,搜索用时 31 毫秒
1.
Chandane Pradnya Jori Chandrashekhar Chaudhari Harshala Bhapkar Sunil Deshmukh Shubham Jadhav Umesh 《Environmental science and pollution research international》2020,27(6):5797-5808
Environmental Science and Pollution Research - The present study described a process for copper (Cu) bioleaching from waste printed circuit boards (PCBs). The 45 (±?0.18) mg/g Cu was... 相似文献
2.
In this study, balanites Aegyptiaca (L.) Del biodiesel was blended in proportions of 10% and 20% on the volume basis with diesel fuel and tested in a single cylinder, VCR diesel engine under measured load conditions with varied EGR rates (0, 10 and 20%). The results showed that B10 and B20 blends shown a significant reduction rate in terms of NOx emissions that were familiar with biodiesel blends. At peak load conditions, BTE increased slightly for test fuel blends compared with pure diesel fuel while the BSFC rate and EGT suffered from increasing and decreasing nature with respect to blending percentage. From the emissions point of view, with the increase in blends percentage, a significant reduction rate is observed in terms of CO and HC concentrations (up to 12.34 and 17.5%, respectively) while NOx emissions decreased at peak load conditions (up to 24.34%). HC and CO emissions decreased with increase in blends percentage. However, lower levels of NOx and EGT (up to 21.37 and 8.47%, respectively) and the average increase in terms of BTE and BSFC (up to 2.83 and 2.9%, respectively) can be realised with B20 test fuel blend under 20% EGR rate. 相似文献
3.
Hugo Olvera-Vargas Nihal Oturan C. T. Aravindakumar M. M. Sunil Paul Virender K. Sharma Mehmet A. Oturan 《Environmental science and pollution research international》2014,21(14):8379-8386
In this work, the electrochemical degradation of the dye azure B in aqueous solutions was studied by electrochemical advanced oxidation processes (EAOPs), electro-Fenton, and anodic oxidation processes, using Pt/carbon-felt and boron-doped diamond (BDD)/carbon-felt cells with H2O2 electrogeneration. The higher oxidation power of the electro-Fenton (EF) process using BDD anode was demonstrated. The oxidative degradation of azure B by the electrochemically generated hydroxyl radicals (?OH) follows a pseudo-first-order kinetics. The apparent rate constants of the oxidation of azure B by ?OH were measured according to pseudo-first-order kinetic model. The absolute rate constant of azure B hydroxylation reaction was determined by competition kinetics method and found to be 1.19?×?109 M?1 s?1. It was found that the electrochemical degradation of the dye leads to the formation of aromatic by-products which are then oxidized to aliphatic carboxylic acids before their almost mineralization to CO2 and inorganic ions (sulfate, nitrate, and ammonium). The evolution of the TOC removal and time course of short-chain carboxylic acids during treatment were also investigated. 相似文献
4.
Parakkatt Parambil Leena Vasudevan Anil Kumar Kundan. K. Dani Sunil. M. Sombawne Palani Murugavel Govindan Pandithurai 《毒物与环境化学》2017,99(4):652-664
The formation of ultrafine particles, their growth, and associated characteristic features has been studied during new particle formation events over a high-altitude station of the Western Ghats during the 2014 post-monsoon season. Most of the events were observed during noon time where particle bursts in the nucleation-mode size range from 5 to 25 nm followed by sustained growth in size. This phenomenon persists for ~4–8 h with a growth rate of 1–2 nm h–1. Peak concentrations of nucleation-mode particles during the event generally vary from 2300 to 5000 cm–3. The mean growth rate is 1.4 ± 0.42 nm h–1, particle formation rate is 1.14 ± 0.22 cm–3 s–1, coagulation sink is 0.35 ± 0.22 cm–3 s–1, and condensational sink is 15.4 ± 2.6?×?10–3 s–1. All these values are comparable with earlier results from Indian region. Comparison of size-segregated particle number concentration during days of new particle formation events and those without new particle formation were carried out showing a distinct variation in nucleation and Aitken mode with least variability associated with the accumulation mode. 相似文献
5.
Chemical Characterization and Variations of Particulate Matter in a Coastal Residential Area Proximate to a Beach Sand Mine in the Ganjam District of Odisha,India 下载免费PDF全文
6.
Can conservation and development interventions in the Indian Central Himalaya ensure environmental sustainability? A socioecological evaluation 总被引:1,自引:0,他引:1
Sunil Nautiyal 《Sustainability Science》2011,6(2):151-167
In biodiversity-rich areas, both conservation and socioeconomic development are at the core of discussions among various stakeholders,
such as local people, policymakers, conservationists, resource management professionals, economists, researchers/scientists,
and so forth. Various innovations are being provided that aim at promoting both improved livelihood for the people and the
conservation and management of natural resources in the Central Himalaya of India. Many studies point out the factors responsible
for the tremendous decline of natural resources and also how they have affected the local people’s livelihood options. In
this context, the current study was undertaken to evaluate the potential of various solutions/innovations that are being implemented
in the Himalayas of India. Unfortunately, only a few are found to be successful in both conservation and sustainable livelihood
development. This study reveals that people are still looking for more viable solutions that could help them improve their
lifestyle, as well as facilitating ecosystem conservation and supporting existing biodiversity. Based on the present study,
it is argued that an in-depth empirical study of any region is a necessary process prior to offering solutions to achieve
the desired goals, as considered by development agencies and policy-planners. 相似文献
7.
The concentrations of suspended particulate matter in the air of the Orissa Sand Complex had an average value of 128 ± 10 µg m?3 in residential areas and 170 ± 8 µg m?3 in mining areas. PM10 levels in residential areas were found to have an average of 35 ± 10 µg m?3, in mining areas 45 ± 10 µg m?3. The distribution of some elements is also discussed here. Inhalation doses were observed to be higher in summer than in winter and the rainy season. The highest dose rate was for the age group of 1 year, and health risks were found to be highest for the same. For adults, inhalation dose and health risk are 1.3 times higher in mining than in residential areas. 相似文献
8.
Journal of Polymers and the Environment - This work describes synthesis of poly (sulfur/soya bean oil) composite material by co-polymerization of elemental sulfur and soya bean oil at... 相似文献
9.
The objective of this study is to cultivate aerobic granules by pure bacterial strain, Bacillus thuringiensis, in a sequencing batch reactor. Stable granules sized 2.0–2.2 mm were formed in the reactor after a five-week cultivation. These granules exhibited excellent settling attributes, and degraded phenol at rates of 1.49 and 1.19 g phenol/(g VSS·d) at 250 and 1500 mg/L of phenol concentration, respectively. Confocal laser scanning microscopic test results show that Bacillus thuringiensis was distributed over the initial small aggregates, and the outer edge of the granule was away from the core regime in the following stage. 相似文献
10.
Khan Nadeem Ghani Correia Jacinta Adiga Divya Rai Padmalatha Satwadi Dsouza Herman Sunil Chakrabarty Sanjiban Kabekkodu Shama Prasada 《Environmental science and pollution research international》2021,28(16):19643-19663
Environmental Science and Pollution Research - Bisphenol A [BPA; (CH3)2C(C6H4OH)2] is a synthetic chemical used as a precursor material for the manufacturing of plastics and resins. It gained... 相似文献