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51.
Yadav Deepak Kumar Chawla Kanhaiya Jain I. P. Lal Chhagan 《Environmental science and pollution research international》2021,28(4):3866-3871
Environmental Science and Pollution Research - Reversible hydrogen storage in MgH2 under specified conditions is a possible way for the positive reception of hydrogen economy, in which the... 相似文献
52.
Sodhi Amanpreet Kaur Bhanot Neeraj Singh Rajwinder Alkahtani Mohammed 《Environmental science and pollution research international》2022,29(57):86092-86108
Environmental Science and Pollution Research - Cement is an essential material used in constructional activities. An emerging concern in the industry however is the CO2 emissions, which are... 相似文献
53.
A polyaniline Zr(IV) selenotungstophosphate nanocomposite was prepared via sol-gel method and characterized by thermogravimetric analysis, scanning electron microscopy, energy dispersive X-ray spectroscopy, and transmission electron microscopy. The combined sorptional–photocatalytic activity of the nanocomposite for degradation of methylene blue and malachite green was investigated and was found to be more efficient than separate adsorption in the dark followed by photocatalysis. The dyes were degraded in 3 h by 96% and 89% by the combined process, as compared to 86% and 72% by the two-step process in 5 h. The nanocomposite material showed antimicrobial activity against Staphylococcus aureus and Escherichia coli. 相似文献
54.
Marghade Deepali Malpe Deepak. B. Duraisamy Karunanidhi Patil Pravin D. Li Peiyue 《Environmental science and pollution research international》2021,28(15):18471-18494
Environmental Science and Pollution Research - In this investigation, the geochemical progression of a total of 31 groundwater samples of pre-monsoon season was assessed with categorization based... 相似文献
55.
56.
Deepak Pudasainee Jeong-Hun Kim Yong-Chil Seo 《Atmospheric environment (Oxford, England : 1994)》2009,43(39):6254-6259
Regulatory control of mercury emission from anthropogenic sources has become a global concern in the recent past. Coal-fired power plants are one of the largest sources of anthropogenic mercury emission into the atmosphere. This paper summarizes the current reducing trend of mercury emission as co-beneficial effect by more stringent regulation changes to control primary air pollutants with introducing test results from the commercial coal-fired facilities and suggesting a guideline for future regulatory development in Korea. On average, mercury emission concentrations ranged 16.3–2.7 μg Sm?3, 2.4–1.1 μg Sm?3, 3.1–0.7 μg Sm?3 from anthracite coal-fired power plants equipped with electrostatic precipitator (ESP), bituminous coal-fired power plants with ESP + flue gas desulphurization (FGD) and bituminous coal-fired power plants with selective catalytic reactor (SCR) + cold side (CS) ? ESP + wet FGD, respectively. Among the existing air pollution control devices, the best configuration for mercury removal in coal-fired power plants was SCR + CS ? ESP + wet FGD, which were installed due to the stringent regulation changes to control primary air pollutants emission such as SO2, NOx and dust. It was estimated that uncontrolled and controlled mercury emission from coal-fired power plants as 10.3 ton yr?1 and 3.2 ton yr?1 respectively. After the installation of ESP, FGD and SCR system, following the enforcement of the stringent regulation, 7.1 ton yr?1 of mercury emission has been reduced (nearly 69%) from coal-fired power plants as a co-benefit control. Based on the overall study, a sample guideline including emission limits were suggested which will be applied to develop a countermeasure for controlling mercury emission from coal-fired power plants. 相似文献
57.
Geum-Ju Song Yong-Chil Seo Deepak Pudasainee In-Tae Kim 《Waste management (New York, N.Y.)》2010,30(7):1230-1237
An attempted has been made to recover high-calorific fuel gas and useful carbonaceous residue by the electric arc pyrolysis of waste lubricating oil. The characteristics of gas and residues produced from electric arc pyrolysis of waste lubricating oil were investigated in this study. The produced gas was mainly composed of hydrogen (35–40%), acetylene (13–20%), ethylene (3–4%) and other hydrocarbons, whereas the concentration of CO was very low. Calorific values of gas ranged from 11,000 to 13,000 kcal kg?1 and the concentrations of toxic gases, such as NOx, HCl and HF, were below the regulatory emissions limit. Gas chromatography–mass spectrometry (GC/MS) analysis of liquid-phase residues showed that high molecular-weight hydrocarbons in waste lubricating oil were pyrolyzed into low molecular-weight hydrocarbons and hydrogen. Dehydrogenation was found to be the main pyrolysis mechanism due to the high reaction temperature induced by electric arc. The average particle size of soot as carbonaceous residue was about 10 μm. The carbon content and heavy metals in soot were above 60% and below 0.01 ppm, respectively. The utilization of soot as industrial material resources such as carbon black seems to be feasible after refining and grinding. 相似文献
58.
Deepak Pudasainee Balkrishna Sapkota Manohar Lal Shrestha Akikazu Kaga Akira Kondo Yoshio Inoue 《Atmospheric environment (Oxford, England : 1994)》2006,40(40):8081-8087
This paper summarizes the results of a yearlong continuous measurements of gaseous pollutants, NO, NO2, NOx and O3 in the ambient air at Kathmandu valley. Measured concentration of the pollutants in study area is a function of time. NO, NO2 and O3 peak occurred in succession in presence of sunlight. At the time of maximum O3 concentration most of the NOx are utilized. The diurnal cycle of ground level ozone concentrations, revealed mid-day peak with lower nocturnal concentrations and inverse relationship exists between O3 and NOx, which are evidences of photochemical O3 formation. The observed ground level ozone during monsoon is slight lower than the pre-monsoon value. Further, lack of rainfall and higher temperature, solar radiation in the pre-monsoon have given rise to the gradual build up of ozone and it is lowest during winter. Ground level ozone concentrations measured during bandha (general strike) and weekend are 19% and 13% higher than those measured during weekdays. The most effective ozone abatement strategy for Kathmandu Valley may be control of NOx emissions. 相似文献
59.
Supriyanka Rana Puranjan Mishra Zularisam ab Wahid Sueta Thakur Deepak Pant Lakhveer Singh 《环境科学学报(英文版)》2020,32(3):47-64
In an era of electronics,recovering the precious metal such as gold from ever increasing piles of electronic-wastes and metal-ion infested soil has become one of the prime concerns for researchers worldwide.Biological mining is an attractive,economical and nonhazardous to recover gold from the low-grade auriferous ore containing waste or soil.This review represents the recent major biological gold retrieval methods used to bio-mine gold.The biomining methods discussed in this review include,biol... 相似文献
60.
Singh Deepak Singh Sunita Patel Suresh Kumar Sinha Shishir Arya Raj Kumar Singh Dhananjay 《Environmental science and pollution research international》2023,30(4):8416-8428
Environmental Science and Pollution Research - Food materials are consumed for nutritional purposes in the form of fruits, vegetables, plants, and meat. These contain proteins, carbohydrates, and... 相似文献