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201.
The goal of this paper is to compare and evaluate the performance of three air quality regulatory models for mercury releases. The models include Industrial Source Complex Short Term model (ISCST2), Industrial Source Complex Long Term model (ISCLT2), and SCREEN2. The evaluation is conducted in multiple point source urban environment using meteorological data, emission inventory and monitoring data for eight stations for the year 1990 to 1992. The performance of the models is evaluated using eight statistical parameters. The comparison of models results for both quarterly and annual averaging periods shows that ISCST2 predictions qualitatively match the observed concentrations; whereas SCREEN2 predicts highest concentrations and ISCLT2 the lowest concentrations. The summary of statistical analysis obtained by using three different methods of observed concentration (Co) and predicted concentrations (Cp) comparison show that the ISCST2 has a better overall performance than ISCLT2 and SCREEN2 models. However, none of the models met the criteria for a reasonable model. Summaries of 95% confidence limits on normalize mean square error (NMSE), geometric mean variance (VG) and geometric mean bias (MG) for each and among model indicate that of the three models, ISCST2 has the best overall performance indicators. Improved model performance may be achieved by incorporating different types of mercury forms into emission rate and air dispersion calculations. 相似文献
202.
Thakur Ravindra Singh Kumar Aditya Lugun Onila Ansari Nasreen Ghazi Prasad Satgur Das Triparna Gupta Neha Patel Devendra Kumar 《Environmental science and pollution research international》2023,30(10):25181-25192
Environmental Science and Pollution Research - In recent years, special attention has been given to emission research that led to the deposition of toxicants from road traffic. Thus, it is... 相似文献
203.
Madhavi Rajak Khageshwar Singh Patel Nitin Kumar Jaiswal Raj Kishore Patel Elza Bontempi Eduardo Yubero Laurent Matini Sema Yurdakul Pablo Martín-Ramos 《环境质量管理》2023,32(3):287-299
Soil quality in urban areas in India is degraded due to multiple anthropogenic activities. The objectives of this work are to determine the concentration variations, toxicity, and sources of carbons, metals, and ions in the surface soil of Raipur, the industrialized capital city of Chhattisgarh state, India. High concentrations of Al, K, Ca, Ti, Fe, and elemental carbon (EC) were registered. Relatively lower concentrations of V, Cr, Mn, Ni, Cu, Zn, Sr, Ba, Pb, organic carbon (OC), and carbonate carbon (CC), as well as ions (viz. F–, Cl–, NO3–, SO42–, Na+, K+, Mg2+, and Ca2+), were also recorded. EC was found to be one of the major pollutants, although enrichment factors pointed to high contamination with SO42–, K+, Mg2+, Cr, Mn, and Pb; and extreme contamination with NO3– and Ca2+. The spatial and temporal variations, enrichment factors, toxicity, and sources of the chemical species detected in the soil are discussed. 相似文献
204.
The study was designed to understand the emissions of ammonia (NH3) and carbon dioxide (CO2) from a single cattle urination event on a tropical grassland and underline the significance of the emissions in the context of huge animal population grazing on large pasture areas in some countries. Emissions of ammonia (NH3) and carbon dioxide (CO2) were monitored for three weeks from a tropical grassland (dominated by Cynodon dactylon Pers.) microcosm contaminated with cow and buffalo urine. The grassland microcosms were treated with urine (50 and 100 ml of each) only once and irrigated with water once every week. Ammonia was sampled by an automatic sampling system comprising of a vacuum pump, three-way stopcocks and rubber tubing and an impinger containing suitable absorbing solution (H2SO4), connected to the tubing suitably. The sampled gas, after sucked by the vacuum pump and absorbed in H2SO4, was allowed to enter the closed microcosm again maintaining internal pressure of the microcosm. Carbon dioxide was sampled by absorption in an alkali (NaOH) trap inside the microcosm. Both NH3 and CO2 emissions were highly variable temporally and there was no continuous increasing or decreasing emission trend with time. Respectively, 45 and 46% of total NH3-N were emitted within first 48 h from 50 and 100 ml cow urine application while the corresponding values for buffalo urine were 34 and 32%. Total NH3-N emissions, integrated for sampling days (i.e. 1, 2, 3, 4, 6, 15, 18 and 21st) were 11 and 6% in cow and 8 and 5% in buffalo urine, of the total-N added through 50 and 100 ml urine samples. Carbon dioxide emissions were standardized at 25 ∘C by using a suitable formula which were lower than actual emissions at actual soil temperature (> 25 ∘C). Carbon dioxide emission rates were classified on the basis of soil repiratory classification and classes ranged from moderately low soil activity up to unusually high soil activity, the latter observed only on very few sampling days. Grasses in the microcosm had shown appreciable growth after urine application. Although variable and somewhat unpredictable, emissions were appreciable and that too only from a patch of single urination, indicating to the huge magnitude of total emissions under the scenario of thousands of cattle grazing on hundreds of acres of grasslands in a tropical country. 相似文献
205.
Patel Beena Patel Akash Patel Pankaj 《Journal of Material Cycles and Waste Management》2023,25(2):1227-1238
Journal of Material Cycles and Waste Management - Municipal solid waste (MSW) disposal has become major issue for the city of Ahmedabad, India. Development, concentrated population and economic... 相似文献
206.
Agarwalla Hridesh Das Tarit Baran Senapati Rabinarayan Gangopadhyay Monalisa Masto Reginald E. Kumar Manish Singh Vikram 《Journal of Material Cycles and Waste Management》2023,25(5):2632-2641
Journal of Material Cycles and Waste Management - India is considered as one of the major mercury emitters of the world. Coal combustion in power plants is the foremost source of mercury emissions.... 相似文献
207.
Allam Venkata Sita Rama Raju Paudel Keshav Raj Gupta Gaurav Singh Sachin Kumar Vishwas Sukriti Gulati Monica Gupta Saurabh Chaitanya M. V. N. L. Jha Niraj Kumar Gupta Piyush Kumar Patel Vyoma K. Liu Gang Kamal Mohammad Amjad Hansbro Philip M. Oliver Brian Gregory George Chellappan Dinesh Kumar Dua Kamal 《Environmental science and pollution research international》2022,29(42):62733-62754
Environmental Science and Pollution Research - Asthma is a chronic inflammatory disease primarily characterized by inflammation and reversible bronchoconstriction. It is currently one of the... 相似文献
208.
Rajoria Sonal Vashishtha Manish Sangal Vikas K. 《Environmental science and pollution research international》2022,29(48):72196-72246
Environmental Science and Pollution Research - Water pollution by recalcitrant compounds is an increasingly important problem due to the continuous introduction of new chemicals into the... 相似文献
209.
Nanda Sonil Patra Biswa R. Patel Ravi Bakos Jamie Dalai Ajay K. 《Environmental Chemistry Letters》2022,20(1):379-395
Environmental Chemistry Letters - Non-biodegradable plastics are continually amassing landfills and oceans worldwide while creating severe environmental issues and hazards to animal and human... 相似文献
210.
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