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151.
Aneja VP Agarwal A Roelle PA Phillips SB Tong Q Watkins N Yablonsky R 《Environment international》2001,27(1):35-42
Ambient concentrations of carbon monoxide (CO), nitrogen oxides (NOx), sulfur dioxide (SO2), and total suspended particulates (TSP) were measured from January 1997 to November 1998 in the center of downtown [the Income Tax Office (ITO) located on B.S.G. Marg] New Delhi, India. The data consist of 24-h averages of SO2, NOx, and TSP as well as 8 and 24-h averages of CO. The measurements were made in an effort to characterize air pollution in the urban environment of New Delhi and assist in the development of an air quality index. The yearly average CO, NOx, SO2, and TSP concentrations for 1997 and 1998 were found to be 4810+/-2287 and 5772+/-2116 microg/m3, 83+/-35 and 64+/-22 microg/m3, 20+/-8 and 23+/-7 microg/m3, and 409+/-110 and 365+/-100 microg/m3, respectively. In general, the maximum CO, SO2, NOx, and TSP values occurred during the winter with minimum values occurring during the summer, which can be attributed to a combination of meteorological conditions and photochemical activity in the region. The ratio of CO/NOx (approximately 50) indicates that mobile sources are the predominant contributors for these two compounds in the urban air pollution problem in New Delhi. The ratio of SO2/NOx (approximately 0.6) indicates that point sources are contributing to SO2 pollution in the city. The averaged background CO concentrations in New Delhi were also calculated (approximately 1939 microg/m3) which exceed those for Eastern USA (approximately 500 microg/m3). Further, all measured concentrations exceeded the US National Ambient Air Quality Standards (NAAQS) except for SO2. TSP was identified as exceeding the standard on the most frequent basis. 相似文献
152.
153.
Goswami Rahul Kumar Agrawal Komal Mehariya Sanjeet Verma Pradeep 《Environmental science and pollution research international》2022,29(41):61905-61937
Environmental Science and Pollution Research - Urbanization is a revolutionary and necessary step for the development of nations. However, with development emanates its drawback i.e., generation of... 相似文献
154.
The presence of citric acid in decontamination waste can cause complexation of the radioactive cations resulting in interferences in their removal by various treatment processes such as chemical precipitation, ion-exchange, etc., which are employed for the removal of radioactivity and may cause potential danger to the environment. Mesoporous Al-MCM-41 (Si/Al=30, 51, 72 and 97) and Si-MCM-41 molecular sieves were synthesized hydrothermally and characterized by XRD, BET (surface area) and FT-IR to evaluate the removal of citric acid through an adsorption process. Adsorption of citric acid over Al-MCM-41 shows the applicability of Freundlich and Langmuir isotherm and follows first order kinetics. The effects of contact time, concentration of citric acid, adsorbents (various Si/Al ratios of Al-MCM-41, Si-MCM-41, Hbeta zeolite and commercial carbon) and pH have been investigated. It has been found that the amount of citric acid adsorbed per unit gram of catalyst followed the order Al-MCM-41 (Si/Al=30)>Al-MCM-41 (Si/Al=51)>activated charcoal>Al-MCM-41 (Si/Al=72)>Al-MCM-41 (Si/Al=97)>Si-MCM-41>Hbeta zeolite. 相似文献
155.
Naveenkumar Rasaiah Ravichandran Manickam Mohanavel Vinayagam Karthick Alagar Aswin Lawrence Sundar Raj Leo Priyanka Swaminathan Shanmugasundaram Harini Kumar Sundramurthy Kiran Kumar Shanmugavelan Pradeep 《Environmental science and pollution research international》2022,29(7):9491-9532
Environmental Science and Pollution Research - The energy storage application plays a vital role in the utilization of the solar energy technologies. There are various types of the energy storage... 相似文献
156.
157.
Tripathi Deep Kumar Rakesh Mehta Pradeep Kumar 《Environmental science and pollution research international》2022,29(36):54167-54180
Environmental Science and Pollution Research - In this experimental study on self-compacting concrete (SCC), the Manufactured sand (M-sand) and Fly ash (FA) were utilised for partial replacement of... 相似文献
158.
Malik Vivek Singh Singh Manvi Pradhan Pranita Singal Kusum Agarwal Amit Chauhan Anil Sra Harnoor Singh Meenu 《Environmental science and pollution research international》2022,29(25):37556-37564
Environmental Science and Pollution Research - Exposure to lead among children, as well as adults, is a major global health issue. With diverse routes of exposure (e.g., food, air, and water)... 相似文献
159.
Pradeep Govind Shaijumon C. S. Rajkumar R. Pradeep Jayadev 《Environment, Development and Sustainability》2022,24(8):9929-9962
Environment, Development and Sustainability - India has the largest dairy industry in the world and accounts for a significant share of the global emission of livestock methane ( $$\hbox... 相似文献