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Nearest neighbour based forecast model for PM10 forecasting: Individual and combination forecasting, (Aerosol & Air Quality Research)
(A. B. Chelani
,15(3),,1130-1136,Year : 2015)
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Air quality forecasting using nearest neighbour technique provides an alternative to statistical and neural network models, which needs the information on predictor variables and understanding of underlying patterns in the data. k-nearest neighbour method of forecasting that does not assume any linear or nonlinear form of the data is used in this study to obtain the next step forecast of PM10 concentrations. Various function approximation techniques such as mean, median, linear combination and kernel regression of nearest neighbours are evaluated. It is observed that kernel regression of nearest neighbours outperforms the other individual models including bench mark persistence model for obtaining the next step forecasts. As the data may involve both linear and nonlinear patterns and any individual model cannot capture both types of patterns, combination forecasting is suggested as an alternative. The forecast error showed the outperformance of combination forecasting over individual forecast, which is quite obvious as it assigns more weightage to the model with minimum error. The study is useful when the data on predictor variables that influence the air pollutant concentrations is not available. The assumption on the underlying distribution of the data is also not required for the approach
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Effect of fipronil on dehydrogenase activity in diverse soil types.(Pesticide Research Journal )
(Prem Dureja,23 1,,41-44,Year : 2011)
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The effect exerted by fipronil, a phenylpyrazole insecticide on dehydrogenase activity of three diverse soils was assessed at recommended doses of fipronil (50 and 75 g a.i. per hectare). The soils used were Inceptisol, Mollisol, and Aridisol with different physico-chemical properties as each soil type is expected to respond differently to the addition of any foreign, potentially toxic compound. There was an initial adverse effect on the dehydrogenase activity. Different soils exhibited different rates of recovery of the activity in a period of 28 days of application with highest recovery rate obtained in Inceptisol (99 and 100%) followed by Mollisol (94 and 97%) and Aridisol (77 and 93%) at higher and lower dose of the pesticide, respectively.
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Toxic effect of hexavalent chromium on composting of segregated organic waste.
(S.U.Patki, SPM.Prince William, S.Y.Bodkhe and A.N.Vaidya,3,,651-658-,Year : 2010)
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No information is available
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On the adsorption/photodegradation of Amoxicillin in aqueous solutions by an integrated photocatalytic adsorbent (IPCA): Experimental studies and kinetics analysis(Photochemical and Photobiological Sciences)
(Colin Barr, David Keane, Anne Morrissey, Kieran Nolan, Michael Oelgemoller, John Tobin,1014,,1022,Year : 2011)
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Activated carbon-supported TiO(2) nanoparticles, termed integrated photocatalytic adsorbents (IPCAs), were prepared using an ultrasonic impregnation technique and investigated for the photocatalytic degradation of amoxicillin (AMO), a ?-lactam antibiotic. The IPCAs had high adsorption affinity for AMO with the amount adsorbed proportional to the TiO(2) loading and the highest adsorption was at 10 wt% TiO(2) loading. A pseudo-second-order model was found to fit the experimental data and consistently predicted the amount of AMO adsorbed over the adsorption period. Equilibrium isotherm studies showed that the adsorption followed the Redlich-Peterson model with maximum adsorption capacity of 441.3 mg g(-1) for 10% IPCA, 23% higher than the pure activated carbon (AC). Kinetic studies on the photocatalytic degradation of AMO using non-linear regression analysis suggest that the degradation followed Langmuir-Hinshelwood (L-H) kinetics. The adsorption rate constant (K(ad)) was considerably higher than the photocatalytic rate constant (k(L-H)), indicating that the photocatalysis of AMO is the rate-determining step during the adsorption/photocatalysis process. The 10% IPCA exhibited excellent stability and reusability over four photodegradation cycles.
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Plasmonic nanostructured Zn/ZnO composite enhances carbonic anhydrase driven photocatalytic hydrogen generation(Journal of CO2 Utilization)
(Mangrulkar, Priti A., Anushree A. Chilkalwar, Abhay V. Kotkondawar, Nilesh R. Manwar,17,,207-212,Year : 2017)
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No information is available
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Deciphering unknown proteins in Human Herpes Viruses(CiiT International Journal of Automation and Autonomous System)
(S. G. Sanmukh, W. N. Paunikar,,,,Year : 2012)
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No information is available
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Isolation and characterization of bacteriophages infecting nocardioforms in wastewater treatment plant. (Biotechnology Research International)
(Khairnar K*, Pal P, Chandekar RH, Paunikar WN.
,151952.,,,Year : 2014)
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Activated sludge plants (ASP) are associated with the stable foaming problem worldwide. Apart from the physical and chemical treatment methods, biological treatment method has been least explored and may prove to be a novel and ecofriendly approach to tackle the problem of stable foam formation. In ASP Nocardia species are commonly found and are one of the major causes for forming sticky and stable foam. This study describes the isolation and characterization of three Nocardia bacteriophages NOC1, NOC2, and NOC3 for the control of Nocardia species. The bacteriophages isolated in this study have shown promising results in controlling foam producing bacterial growth under laboratory conditions, suggesting that it may prove useful in the field as an alternative biocontrol agent to reduce the foaming problem. To the best of our knowledge to date no work has been published from India related to biological approach for the control of foaming.
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Air quality status of a beach resort and theme park site with special reference to particle size distribution (Indian Assocation of Environment Management)
(R. Jayabalou, S. Swarnalatha, N. Vinayagamoorthy,,,p. 177-181 ,Year : 2016)
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No information is available
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E-waste an urban environmental pollution: problems and prospects in developing countries(International Conference on Solid Waste 2013: Innovation in Technology and Management at Hong Kong)
(P. S. Dutt,333,,,Year : 2013)
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"Electronic waste or E-waste comprises of old, end-of-life electronic appliances such as computers, laptops, TVs, DVD players, refrigerators, freezers, mobile phones, MP3 players etc. which have been disposed of by their original users. E-waste contains many hazardous constituents that may negatively impact the environment and affect human health if not properly managed. The problem of E-waste has forced Environmental agencies of many countries to innovate, develop and adopt environmentally sound options and strategies for E-waste management, with a view to mitigate and control the ever growing threat of E-waste to the environment and human health. E-waste management is given the top priority in many developed countries, but in rapid developing countries like India, it is difficult to completely adopt or replicate the E-waste management system followed in developed countries due to many country specific issues viz. socio-economic conditions, lack of infrastructure, absence of appropriate legislations for E-waste, approach and commitments of the concerned, etc. The paper presents E-waste scenario in developing countries, E-waste composition, categorization, prospects of recoverable, recyclable and hazardous materials found in the E-waste, recycling and recovery options followed And the overview and need of the laws and regulation related to E-waste for better E-waste Management."
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Water Quality Analysis of Surface Water: A Web Approach(Environmental Monitoring and Assessment)
(Meenal Chourasia,185(7) ,,5987-5992,Year : 2013)
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The chemical, physical and biological characteristics of water with respect to its suitability describe its quality. Concentration of pesticides or fertilisers degrades the water quality and affects marine life. A comprehensive environmental data information system helps to perform and complete common tasks in less time with less effort for data verification, data calculations, graph generation, and proper monitoring, which helps in the further mitigation step. In this paper, focus is given to a web-based system developed to express the quality of water in the imprecise environment of monitoring data. Water samples were analyzed for eight different surface water parameters, in which four parameters such as pH, dissolved oxygen, biochemical oxygen demand, and fecal coliform were used for the water quality index calculation following MPCB Water Quality Standards of class A-II for best designated use. The analysis showed that river points in a particular year were in very bad category with certainty level of 0-38% which is unsuitable for drinking purposes; samples in bad category had certainty level that ranged from 38 to 50%; samples in medium to good category had certainty levels from 50 to 100%, and the remaining samples were in good to excellent category, suitable for drinking purposes, with certainty levels from 63 to 100%.
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Packaged drinking water in India: How safe is it?"(Journal of Environmental Monitoring and Assessment)
(,,,,Year : 2016)
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No information is available
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Utilization of coconut shell carbon in the anode compartment of microbial desalination cell (MDC) for enhanced desalination and bio-electricity production(Journal of Environmental Chemical Engineering )
(V.M. Bhalambaal ,3,,2768–2776,Year : 2016)
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No information is available
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A systematic review and meta-analysis of voltammetric and optical techniques for inorganic selenium determination in water(TrAC Trends in
Analytical Chemistry)
(Devi, Pooja, Rishabh Jain, Anupma Thakur, Manish Kumar, Nitin K. Labhsetwar, Manoj Nayak, and Praveen Kumar,95,,69-85,Year : 2017)
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No information is available
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Selection of appropriate analytical tools to determine the potency, microbial bioactivity and resistance of antibiotics(Journal of Pharmaceutical Analysis)
(Nishant Dafale, Uttam Semwal, Rupak Rajput, G. N. Singh ,6(4),,207-213 ,Year : 2016)
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Antibiotics are the chemotherapeutic agents that kill or inhibit the pathogenic microorganisms. Resistance of microorganism to antibiotics is a growing problem around the world due to indiscriminate and irrational use of antibiotics. In order to overcome the resistance problem and to safely use antibiotics, the correct measurement of potency and bioactivity of antibiotics is essential. Microbiological assay and high performance liquid chromatography (HPLC) method are used to quantify the potency of antibiotics. HPLC method is commonly used for the quantification of potency of antibiotics, but unable to determine the bioactivity; whereas microbiological assay estimates both potency and bioactivity of antibiotics. Additionally, bioassay is used to estimate the effective dose against antibiotic resistantmicrobes. Simultaneously, microbiological assay addresses the several parameters such as minimal inhibitory concentration (MIC), minimum bactericidal concentration (MBC), mutation prevention concentration (MPC) and critical concentration (Ccr) which are used to describe the potency in a more informative way. Microbiological assay is a simple, sensitive, precise and cost effective method which gives reproducible results similar to HPLC. However, the HPLC cannot be a complete substitute for microbiological assay and both methods have their own significance to obtain more realistic and precise results.
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"Effect of hydrophobicity of pharmaceuticals and personal care products for adsorption on activated carbon: Adsorption isotherms, kinetics and mechanism"(Environmental Science and Pollution Research)
(Harkirat Kaur & Amit Bansiwal & Girivyankatesh Hippargi & Girish R. Pophali1
,,,20473–20485,Year : 2015)
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"Adsorption of three pharmaceuticals and personal care products (PPCPs), namely caffeine, ibuprofen and triclosan on commercial powdered activated carbon was examined in aqueous medium. The contaminants were chosen based on their diverse log Kow (octanol-water partition coefficient) viz. − 0.07 for caffeine, 3.97 for ibuprofen and 4.76 for triclosan to examine the role of hydrophobicity on adsorption process. The adsorbent characterisation was achieved using BET surface area, SEM, pore size distribution studies and FTIR. Influence of mass of PAC, contact time, solution pH and initial concentration on adsorption capacity of PAC was studied. Adsorption isotherms and kinetics were applied to establish the mechanism of adsorption. The kinetics followed pseudosecond order with physisorption occurring through particle diffusion. The Freundlich model fitted best among the isotherm models. The adsorption capacity increased in the order CFN < IBU < TCS which correlates with increasing hydrophobicity (log Kow), molecular weight and decreasing water solubility, respectively. We conclude that micro-pollutant hydrophobicity contributes towards adsorption on activated carbon."
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Review of zero-valent aluminium based water and wastewater treatment methods(Chemosphere)
(P. V. Nidheesh, Jayraj Khatri, T. S. Anantha Singh, R. Gandhimathi, S. T. Ramesh
,200,, 621-631,Year : 2018)
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Zero-valent metals (ZVM) are widely used to remove heavy metals, contaminants, toxicity, etc. from water and wastewater. Zero-valent aluminium (ZVAl) has large surface area and high surface reactivity. It has enormous ?exibility for the in-situ application. ZVAl can be applied as either a single or a bimetallic system as well as advanced oxidation processes (AOPs). It is observed that ZVAl is capable of generating hydroxyl and sulfate radicals in water medium, which remove non-biodegradable pollutants from aqueous solution. ZVAl-based processes can remove non-biodegradable organic contaminants from water mediumwithin a short duration. ZVAl is also used as a reducing agent. It is eficient to reduce toxic hexavalent chromium to less toxic trivalent chromium. ZVAl, in various combinations in bimetallic system (Fe/Al, Pd/Al, Cu/Al), is able to remove various contaminants from aqueous medium. Overall, it can be concluded that ZVAl-based methods for water and wastewater treatment are promising environmental technologies.
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Development of correction factors for landfill gas emission model suiting Indian condition to predict methane emission from landfills(Bioresource Technology)
(Sil, A., Kumar, S.,&Wong, J.W.C.,168,,97-99,Year : 2014)
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Methane emission from landfill gas emission (LandGEM) model was validated through the results of laboratory scale biochemical methane potential assay. Results showed that LandGEM model over estimates methane (CH4) emissions; and the true CH4 potential of waste depends on the level of segregation. Based on these findings, correction factors were developed to estimate CH4 emission using LandGEM model especially where the level of segregation is negligible or does not exist. The correction factors obtained from the study were 0.94, 0.13 and 0.74 for food waste, mixed un-segregated municipal solid waste (MSW) and vegetable wastes, respectively.
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Managing future air quality in megacities : A case study for Delhi (Atomspheric Environment)
(Amann, M., Purohit, P., Bhanarkar, A.D., Bertok , I., Borken - Kleefeld, J., Cofala, J., Majumdar , D., Nguyen, B., Rafaj, R., Schopp, W., Srivastava, A.,Vardhan, B.H.,161,,99-111,Year : 2017)
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"Urbanization, population and economic growth in Indian megacities like Delhi have resulted in an increase in energy and transportation demand leading to severe air pollution and related health impacts, as well as to the rapid growth in the greenhouse gas emissions. In this study, an integrated assessment of air quality and climate policies for Indian cities –with a particular focuson National Capital Territory of Delhi,has been carried out.We have developed emission inventory of air pollutants and greenhouse gases for the base year (2010) and evaluated the impact ofcurrent policieson emission projections by 2030 in the business-as-usual scenario. Emissions of coarse and neparticulate matter areprojected to be 51% and 15% higher in 2030 as compared to present. As the current legislations do not indicate progress towards the achievement of the Indian National Ambient Air Quality Standards in Delhi, we explored the efectiveness of additional emission control strategies with either advanced end-of-pipe emission controls or low carbon policies. Relative to the baseline scenario, the set of alternative policy strategies would reduce emissions rapidly in 2030.The results revealed that air quality policies under various scenarios could also have co-benefits of reducing carbon emissions. At the same time, the results suggest that low carbon policies would be more eficient to cut emissions as compared to advanced end-of-pipe emission control policies. However, their implementation could be limited by the availability of clean fuels. In the climate policy scenario, carbon emission in 2030 is estimated to decrease by 19% relative to baseline. Additional controls combined with low carbon policies like controlling non-industrial emissions create an opportunity to further enhance the scope for co-bene?ts and to attain the air quality standards in Delhi. "
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Review of processes controlling Arsenic retention and release in soils and sediments of Bengal basin and suitable iron based technologies for its removal
(Komal Kalawapudi, Sudheer Salana, Ritesh Vijay ,8,,358-367,Year : 2019)
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Arsenic in the soil environment has gained renewed interest because of the emerging cognizance that arsenic poisoning is a global concern. Groundwater in the Bengal Basin is significantly polluted by naturally occurring arsenic (As), a toxic metalloid, which adversely affects human health and among the countries facing As contamination problems, India and Bangladesh are the most affected. In soils and sediments, arsenic is often associated with Fe(III) (hydr)oxides and multiple processes/reactions govern its release into groundwater, including abiotic or biotically mediated oxidation-reduction and ligand exchange reactions. Reductive dissolution of arsenic-bearing Fe(III) (hydr)oxides and As(V) reduction to As(III) are the two main mechanisms controlling arsenic partitioning in soils, sediments and groundwater. Even though arsenic reduction is favourable over a wide range of conditions, Fe(III) reduction in nature is dependent on the biotic systems. This review reflects the current state of research for the understanding of arsenic in the soil environment with an emphasis on iron based technologies for its removal. It attempts to collate all the relevant literature such that it can be a useful resource for researchers or policy makers to help recognize and explore useful treatment options.
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Evaluation and analysis of noise levels at traffic intersections of Nagpur city, India(Journal of Environmental Science and Engineering)
(Ritesh Vijay, Rishabh Popat, M. Pisode, A. Sharma, M. Kumar, T. Chakrabarti and Rajesh Gupta,55,2,197-206,Year : 2013)
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The objective of the present study was to monitor and assess the noise levels at traffic intersections in Napgur city under heterogenic traffic activities. For this, traffic volume and noise level were measured at intersections on highways, major roads and ring road during morning and evening peak hours. Traffic volume was categorized in light, medium and heavy vehicles while noise levels were measured for Lmin, Lmax, Leq, L10 and L90. Equivalent noise was observed in the range of 71.3 to 79.3 dB(A) at the traffic intersections. Due to heterogenic traffic conditions and activities at the intersection like honking, idling, gear noise, bearing noise, breaking noise, tyre-road noise and exhaust noise, no correlation was established between traffic volume and observed noise levels except West High Court road. A strong correlation was found at West High Court road due to controlled traffic flow and less impact of heavy vehicles. Impact of noisy vehicles on general traffic was also assessed at the traffic intersections based on noise pollution levels and traffic noise index. The study suggests that control measures are required at the traffic intersections to minimize noise pollution levels.
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