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Copper oxide incorporated mesoporous alumina for defluoridation of drinking water(Microporous and Mesoporous Materials )
(A Bansiwal, P Pillewan, RB Biniwale, SS Rayalu,129 1, ,,54-61,Year : 2010)
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No information is available
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Removal of persistent organic pollutant Hexachlorocyclohexane isomers by advanced oxidation process(Journal of Environment Science & Engineering )
(G.S. Kanade
,52(2), ,,,Year : 2012)
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No information is available
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Real time Ambient Air Quality Status During Diwali Festival in Central, India(Environment Science)
(Shivangi Nigam, B. Padma S. Rao, N. K. Mandal, N Kumar, and C. Chauhan, V.A. Maishlkar, P. N. Mishra,05,Issue 3/4,,Year : 2016)
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In India, festivals are celebrated with lot of enthusiasm and Diwali is the major festival of light. In this festival, houses are illuminated by lights and sky is illuminated by fireworks. These fireworks though create lot of amusement but also pollute the atmosphere in terms of air pollution. The continuous air pollution monitoring was undertaken during Diwali festival (2014) at residential site NEERI, Nagpur. Air quality parameters were compared with CPCB standard. On Diwali day, PM 10 and PM 2.5 concentration achieve its highest value of 900 µg/m 3 and 950 respectively µg/m 3. This high concentration is maintained in atmosphere for two days of this festival in atmosphere which is approximately 8-9 times more than that regulatory standard. These particles carry all the components of the cracker including heavy metals, alkali metals, alkaline earth and change the atmosphere with positive and negative ions apart from impaction of sulfur and other acid gases to the atmosphere.
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Biogas Generation from Low Strength Domestic Wastewater by Using Partially Phased Anaerobic Process(Journal of Chemical & Environmental Research)
(,,,,Year : 2015)
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No information is available
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Equilibrium modeling for biosorption of safranin onto chemically modified biomass of marine Aspergillus wentii(Water, Air, and Soil Pollution)
(Yasmin Khambhaty, Kalpana Mody and Bhavanath Jha, 679-691,,,Year : 2011)
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Safranin was used as a model reactive dye for biosorption studies onto various forms of chemically modified biomass of Aspergillus wentii. The experimental equilibrium data was analyzed by various single-, two-, three-, four-, and five-parameter isotherms to understand the biosorption process. Biosorption isotherms modeling shows that the interaction of safranin with A. wentii surface is localized monolayer sorption. Results show that in general the accuracy of models to fit experimental data improves with the degree of freedom. The interaction among adsorbed molecules is repulsive having no association between them and sorption is carried out on energetically different sites and is an endothermic process. The five-parameter Fritz–Schluender model gives the most accurate fit with high regression coefficients (0.9902–0.9941), low standard errors (0.0389–0.0758), and sum of squares error (0.0075–0.0230) values to all experimental data in comparison to other models. The results disclose that the sorption isotherm models fitted the experimental data in the order: Fritz–Schluender (five-parameter) > Langmuir > Khan > Fritz–Schluender (four-parameter) > Temkin. This systematic evaluation of the more important equilibrium isotherm models provided the general basis for making a preliminary selection of an effective model for a given application.
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Membrane filtration immobilization techniquea simple and novel method for primary isolation and enrichment of bacteriophages(Journal of applied microbiology)
(Ghugare, G. S., Nair, A., Nimkande, V., Sarode, P., Rangari, P.
,Vol.122 ,Issue 2,531-539,Year : 2016)
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Aim:
To develop a method for the isolation and enrichment of bacteriophages selectively against speciÞc bacteria coupled with a membrane Þltration technique. Methods and Results: Rapid isolation and concentration of host-speciÞc bacteriophages was achieved by exposure of the sample suspected to contain bacteriophages to a speciÞc host immobilized on a 0 45 lm membrane in a membrane Þltration unit. The principle behind this method is the exploitation of host-speciÞc interaction of bacteriophages with their host and maximizing this interaction using a classic membrane Þltration method. This provides a chance for each bacteriophage in the sample to interact with the speciÞc host on the membrane Þlter Þtted with a vacuum pump. SpeciÞc bacteriophages of the host are retained on the membrane along with its host cells due to the effect of adsorption and these adsorbed bacteriophages (along with their hosts) on the Þlter disc are then ampliÞed and enriched in regular nutritive broth tryptose soya broth by incubation. With the help of the plaque assay method, host-speciÞc phages of various bacterial species were isolated, segregated and enriched.
Conclusions:
The phage concentration method coupled with membrane Þltration immobilization of host bacteria was able to isolate and enrich the host-speciÞc bacteriophages by several fold using a lower quantity of an environmental water sample, or other phage suspensions. Enrichment of phages from single plaques was also achieved. Significance and Impact of the Study: The isolation and detection of host-speciÞc bacteriophages from a low density bacteriophage water sample in a single step by the use of a simple and basic microbiological technique can be achieved. Enrichment of phages from low phage titre suspensions is also achieved very effectively.
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A roadmap for development of sustainable e-waste management system in India(Journal of Science of the Total Environment)
(P. S. Dutt,409,1, 1 ,19-32,Year : 2010)
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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 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. This paper presents a review and assessment of the E-waste management system of developed as well as developing countries with a special emphasis on Switzerland, which is the first country in the world to have established and implemented a formal E-waste management system and has recycled 11 kg/capita of WEEE against the target of 4 kg/capita set by EU. And based on the discussions of various approaches, laws, legislations, practices of different countries, a road map for the development of sustainable and effective E-waste management system in India for ensuring environment, as well as, occupational safety and health, is proposed.
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Toxicity of Ammonium Perchlorate wastewater on Fish - Tillapia mossambica-(Peter), National Conference on Environmental management conducted by Centre for Environment (Institute of Engineers(India) Journal(Environmental))
(Kamatchiammal, S and Shanta Satyanarayana,,,,Year : 2016)
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No information is available
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Arsenic removal from drinking water by electrocoagulation using iron electrodes-an understanding of the process parameters(Journal of Environmental Chemical Engineering )
(Banerji, Tuhin,4,4,3990-4000,Year : 2016)
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Various methods exist for arsenic removal from water, but most are not viable as they require addition of oxidants and use adsorbents which have limited adsorption capacities. Electrocoagulation using iron electrodes (ECFe) is a promising technology for arsenic removal. Efficiency of arsenic removal by ECFe may be affected by parameters such as pH, current intensity, initial arsenic concentration and co-occurring ions like phosphate, silicate, natural organic matter (NOM), bicarbonate, sulphate, nitrate and chloride but the causal action is not well understood. Thus experiments were designed and carried out to observe these effects and get a better understanding of ECFe. The results indicate that the oxidation of Fe(II) generated during ECFe is essential for high efficiency (with respect to iron dose) of arsenic removal. Lower current intensities and pH7 were found to be most efficient for arsenic removal per unit weight of iron dissolved. Observations indicate that arsenic reacts with ferric (hydr)oxides and phosphate complexes with Fe(II). With time these complexes and precipitates are reordered to give a much higher affinity of iron (hydr)oxides for phosphate. Silicate, upto 20 mg/L, had negligible effect but at 30 mg/L was seen to reduce arsenic removal by ECFe. Increasing NOM concentrations also reduced arsenic removal but bicarbonate, sulphate, nitrate and chloride had no effect on arsenic removal by ECFe. Presence of old ferric (hydr)oxides in the reactor led to lesser requirement of Fe(II) to achieve less than 10 ppb concentration as it promoted interfacial reactions. Formation of FeAsO4 was observed by FTIR analysis of the precipitates.
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Web based framework for water quality analysis of surface water (Environmental Pollution Control Journal )
(Poonam Prasad, Meenal Chaurasia, R.A.Sohony, Indrani Gupta, Rakesh Kumar,,,,Year : 2011)
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No information is available
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Cadmium Removal from Aqueous Solutions Using Dried Banana Peels as an Adsorbent: Kinetics and Equilibrium Modeling(Journal “Bioremediation & Biodegradation)
(Prashant D Deshmukh, Vilas M Shinde and Pawankumar Labhasetwar,,,,Year : 2017)
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No information is available
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Utilization of Rice - husk and Coconut Shell Carbons for Water Disinfection(Journal of Environmental Science and Engineering (JESE))
(D Catherine and VM Bhalambaal, 55 1 9-16,,,Year : 2016)
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No information is available
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Measurement and Chemical Speciation of PM10 in Mumbai City(J Environ. Science & Engg)
(Abhay singh Salunkhe, Sugandha Shetye,55,4,441-455,Year : 2013)
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Mass concentrations of PM10 were high at all locations of Mumbai city in all seasons. From the enrichment analysis, it was observed that high enrichment of metals existed at all sites, the reason for which could be the effects of meteorology and trans-boundary movement of pollutants. Multivariate statistical analysis tools were used to identify common sources, viz. road dust, biomass burning, secondary aerosol, brake wear, residual oil combustion, smelting, natural soil, vehicles tyre wear, and marine aerosol. Findings indicate that most of the sites were dominated by local sources based on activities in the vicinity of the sampling locations.
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SPEED-DEPENDENT MODELING OF ECOSYSTEM EXPOSURES FROM VEHICLES IN THE NEAR-ROAD ENVIRONMENT(Journal of Environmental Systems)
(P. KHANNA,,,21,Year : 1992)
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The article presents a model of automobile exhaust emissions in terms of vehicle speed and plant stomatal resistance. The software, which offers several advantages in environmental decision making, has been developed for computing gas—specific flux contributions and total daily ecosystems-health exposure-risk for a near road environment under strong wind con- ditions. Concentration differential has been taken as proportional to the emis- sion values from vehicles at different speeds. Flux contributions from different gaseous pollutants, and total daily exposure-risks have been com- puted as a function of vehicular speed and PAR-dependent curvature-coeffi- cient. The calibration and validation of the model will be cost effective, as the number of parameters included in the model is significantly lower than the number required in the conventional models.
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Control of Multi-drug Resistant Gene Flow in Environment through Bacteriophage Intervention(Applied Biochemistry and Biotechnology)
(Krupa M. Parmar, Zubeen J. Hathi, Nishant A. Dafale,181(3),,1007-1029,Year : 2017)
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The spread of multidrug-resistant (MDR) bacteria is an emerging threat to the environment and public wellness. Inappropriate use and indiscriminate release of antibiotics in the environment through un-metabolized form create a scenario for the emergence of virulent pathogens and MDR bugs in the surroundings. Mechanisms underlying the spread of resistance include horizontal and vertical gene transfers causing the transmittance of MDR genes packed in different host, which pass across different food webs. Several controlling agents have been used for combating pathogens; however, the use of lytic bacteriophages proves to be one of the most eco-friendly due to their specificity, killing only target bacteria without damaging the indigenous beneficial flora of the habitat. Phages are part of the natural microflora present in different environmental niches and are remarkably stable in the environment. Diverse range of phage products, such as phage enzymes, phage peptides having antimicrobial properties, and phage cocktails also have been used to eradicate pathogens along with whole phages. Recently, the ability of phages to control pathogens has extended from the different areas of medicine, agriculture, aquaculture, food industry, and into the environment. To avoid the arrival of pre-antibiotic epoch, phage intervention proves to be a potential option to eradicate harmful pathogens generated by the MDR gene flow which are uneasy to cure by conventional treatments.
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"Investigation of DNA/BSA binding of three Ru(II) complexes by various spectroscopic methods, molecular docking and their antimicrobial activityt "(Journal of Coordination Chemistry)
("Vuradi Ravi kumar, Penumaka Nagababu, G. Srinivas, M. Rajender Reddy, M.
Vinoda Rani, Mudavath Ravi & S. Satyanarayana",VOL . 70, ,NO . 22,3790–380,Year : 2017)
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An intercalative ligand, ppip (ppip = {2-(4-(piperidin-1-yl)phenyl)-1H-imidazo[4,5-f][1,10]phenanthroline}), and its mononuclear Ru(II) polypyridyl complexes, [Ru(phen)2(ppip)]2+ (1) (phen=1,10-phenanthrolene), [Ru(bpy)2(ppip)]2+ (2) (bpy=2,2′-bipyridine) and [Ru(dmb)2(ppip)]2+ (3) (dmb=4,4′-dimethyl-2,2′-bipyridine), have been synthesized and characterized by elemental analysis and spectroscopic techniques such as UV–vis, IR, 1H, as well as 13C NMR and ESI-MS. The interaction of these complexes with DNA/BSA (bovine serum albumin) was investigated using absorption, emission spectroscopy, viscosity measurements and molecular docking studies. The docking study infers that the binding strength (Kb) of these complexes was in agreement with results from absorption and emission techniques. These studies reveal that these three Ru(II) polypyridyl complexes bind to DNA/BSA. The binding ability of these complexes in the presence of different ions and solvents were also reported. All complexes were effectively cleaving pBR322 DNA in different forms and follows order which is similar to absorption and emission studies. These complexes were effective exhibiting the antimicrobial activity against different microbes Bacillus subtilis, Escherichia coli and Staphylococcus aureus
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Performance of Natural Coagulant Extracted from Plantagoovata Seed for the Treatment of Turbid Water(Water Air Soil Pollut )
(S. Dhivya & S. T. Ramesh & R. Gandhimathi & P. V. Nidheesh,228,,423,Year : 2017)
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Abstract Present study investigates the coagulation ability of Plantago ovata (P. ovata)seedextracts for turbidity removal. The active coagulant agents were successfully extracted from P. ovata seeds using different solvents such as distilled water (PO-DW), tap water (PO-TW), NaCl (PO-NaCl), and ammonium acetate (PO-AA). Experiments were conducted in batch mode for initial turbidity such as 500 NTU (high), 150 NTU (medium), and 50 NTU (low). Results demonstrated that P. ovata extracts are less efficient in low turbidities, while PO-NaCl was found to provide high coagulation activity in all initial turbidity concentrations compared to other extracts. PO-NaCl was able to remove 98.2, 94.9, and 80.2% of turbidity from water having in initial turbidities of 500, 150, and 50 NTU, respectively. Coagulation activity of the extract was the best when the extraction was performed for 50 min at room temperature. Jar test procedure with the coagulation time of 1 min and flocculation time of 30 min was optimized, irrespective of the initial turbidity. The optimum settling time for 500, 150, and 50 NTU water samples were 20, 30, and 90 min, respectively. PO-NaCl was used in different pH turbid solutions and it was found to be working very efficiently in alkaline conditions. The coagulation efficiency of the coagulant stored in refrigerator was higher than that stored at room temperature. Thus, the natural coagulants extracted from P. ovata seeds revealed to be effective for turbidity removal.
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Artificial neural network modelling in biological removal of organic carbon and nitrogen for the treatment of slaughterhouse wastewater in a batch reactor(Environmental Technology)
(Kundu, P., Debsarkar, A., Mukherjee, S.N.,&Kumar, S. ,35,,1296-1306,Year : 2014)
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No information is available
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Optimisation of laboratory arsenic analysis for groundwaters of West Bengal, India and possible water testing strategy(International Journal of Environmental Analytical Chemistry)
(Kundu AK., Majumder S., Biswas A., Bhowmick S., Pal C., Mukherjee A., Majumder M., Chatterjee D,40266,,,Year : 2018)
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Regularmonitoring of arsenic (As) in groundwater is crucial frompublic health perspectives as millions of people are suffering due to use of contaminated aquifer water for drinking purposes. The routine analyses, especially in developing nations, are mostly done in localised government/non-government laboratories with limited resources, having the target of analysing large number of samples in each run. Thus apart from analytical sensitivity, cost-effectiveness of the method and eco-friendliness of the experimental operation are key surreptitious factors. This demands optimisation of total As measurement methods and finding a method that gives ‘optimumbenefit’ considering all these factors together. The present study therefore evaluates four common As (total) measurement methods [iodometric- colorimetric method, silver diethyl dithiocarbamate method, molybdenum blue method and hydride generation atomic absorption spectrophotometric (HG-AAS) method] practised in the Bengal Delta Plain, in view of their analytical sensitivity, related environmental hazard and experimental costs. It was found that the HG-AAS method is analytically more sensitive, whereas the iodometric-colorimetricmethod and the molybdenum blue method are better choices in terms of eco-friendliness and cost-effectiveness, respectively. However, when all three factors (analytical reliability, environmental hazard and cost) are considered simultaneously, themolybdenumbluemethodwas found to be placed first in the ‘optimum performance rank’ list. It was also found that both environmental hazard and cost play a more crucial role than analytical reliability, although this is case specific andwould differ from place to place around the globe. Finally based on the results, we have hypothesised a water testing strategy for developing countries such as India where the molybdenum blue method can be adapted as a screening method and later the HG-AASmethod can be used to precisely identify the groundwater samples with As concentration below the WHO drinking water guideline value of 10 g/L.
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Impact of urbanization on creeks of Mumbai, India: a geospatial assessment approach(Journal of Coastal Conservation)
(Ritesh Vijay, Jaydip Dey, Saurabh Sakhre, Rakesh Kumar ,Vol 24, (1),,1-16,Year : 2020)
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Creeks are the inherent coastline feature that connects rivers to the sea and plays an important role in the ecological processes and the material transfer. In the present study, an impact of urbanisation on the creeks of Mumbai, India namely Thane, Malad and Manori creeks, has been addressed. Multi-temporal satellite images of Landsat for the years 1972, 1994 and 2016 are considered to perform the changes in the mudflat and growth of the mangrove, as well as the changes in creeks width apart from the Land use Land cover (LULC). Object-based image analysis using multi-spectral resolution confirmed that there is an overall increase in the spatial extent of mangroves and reduction in the width of all the creeks. Mangroves around Thane creek and Manori creek have increased from 50.7 km2 to 57.6 km2 and 8.4 km2 to 25.2 km2respectively. However, there is a decrease in mangroves around Malad Creek from13.3 km2 to 9.7 km2during 1972 to 2016. The relationship between the creek geometry and LULC was also explored, and it has been revealed that the creek width has reduced due to urbanisation. Life expectancy analysis projected a further reduction in the width of the creeks for the years 2025 and 2050. The study suggests that there must be stringent bye-laws for disposal of sewage into the creeks and development activity near the creek areas. Further, upper stretches of the creeks require cleaning and dredging so that the tidal water will be approached up to the upper portion to maintain the creek ecosystem.
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