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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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Surveillance of drinking water quality for safe water supply ? A case study from Shillong India(Water Resources Journal)
(G.K. Khadse • M. Kalita • S. N. Pimpalkar • P. K. Labhsetwar,,,,Year : 2011)
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No information is available
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Conservation, Development and Management of Water Resources: An Experience in Himalayan Region, India(International Journal of Water Resources and Arid Environments )
(G.K. Khadse, A.V. Talkhande, P.S Kelkar and P. K. Labhsetwar,,,,Year : 2011)
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No information is available
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Drinking water quality monitoring and surveillance for safe water supply in Gangtok, India( Environment Monitoring and Assessment)
(G. K. Khadse, M. Kalita, S.N. Pimpalkar, P. K. Labhsetwar,,,,Year : 2011)
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No information is available
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Change in drinking water quality from source to point-of-use and storage: a case study from Guwahati, India( Environment Monitoring and Assessment)
(G.K. Khadse, M. Kalita and P. K. Labhsetwar,,,,Year : 2011)
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No information is available
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Performance of Portable Instant Water Filter Developed for Emergency Water Supply(International Journal of Water Resources and Arid Environments )
( Er. Subhash Andey, Ms. Kirti. Lanjewar, Muduli and Pawan Labhasetwar, Vol. 1(2),,146-152 ,Year : 2011)
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No information is available
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Lab Scale Study on Electrcoagulation Defluoridation Process Optimization along with Aluminium Leaching in the process and Comparison with Full scale Plant Operation(Journal of Water Science and Tech)
(Poonam Kailash Gwala, Subhash P. Andey, Vasant Mhaisalkar; Pawan Labhasetwar, Sarika Pimpalkar, Chetan Kshirsagar,Vol. 63,No. 12,p 2788–2795,Year : 2011)
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No information is available
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How safe are the global water coverage figures? Case study from Madhya Pradesh, India( Environment Monitoring and Assessment)
(Sam Godfrey, Pawan Labhasetwar, Satish Wate, Sarika Pimpalkar,,,,Year : 2011)
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No information is available
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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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Feasibility Studies on Recycling/Reuse of Wastewater from Automobile Industry
(Shuchi Tayal, Anoop Verma, Pravin Manekar,,,,Year : 2011)
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The wastewater from automobile industry consists of high organic, inorganic matter with oil and grease and heavy metals. If partially treated or untreated wastewater is discharged to damage the geo-environment. Sustainable growth in automobile industry warrants water conservation. The effluents recycle/reuse provides a novel opportunity to augment the increasing demand and enhance the idea of closing the water cycle (Takashi Asano, 2002). Water reclamation refers to the capture, treatment, and recycling/reuse of wastewater, typically for non-potable purposes. Implementation of wastewater reclamation, recycling/reuse need to be promoted for preservation of limited water resources. The automobile industry is therefore, a prime member for the recycle/reuse of treated wastewater. Recycled water satisfies more water demands in automobile industry, as long as it is adequately treated. The issues like water quality criteria, techno-economic analysis are essential components for water reuse. The treatment technologies engaged for treating the automobile effluent are dissolved air floatation (DAF) (Reed et. al. 1998), oil & water separator and chemical treatment, where coagulant like alum, ferrous sulphate and calcium chlorite and coagulant aid PAC are added (Mazumder and Mukherjee; 2011). The biological treatment includes biological filter, sequencing batch reactor (SBR), anaerobic sequencing batch biofilm reactor (Oliveira et al; 2007) and constructed wetlands (Ca?izares et al. 2008). In advance treatment system such as ultrafiltration (UF) (Zhao et al. 2006) is used for water recovery.
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Closing water loop in a paper mill section for water conservation and reuse(Desalination)
(Manikavasagam Karthik, Rita Dhodapkar, Pravin Manekar, Pawan Aswale, Tapas Nandy,Vol(281),Pages(172-178),,,Year : 2011)
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Water is critical to paper production and increasing competition from other users has reduced water availability to paper mills in recent years. The study was conducted at a large-scale integrated pulp and paper industry. The study conducted at laboratory for recycling of effluents was aimed at reducing water foot print of the paper mill. Paper machine section effluent was identified for treatment and reuse based on the flow and characteristics. Chemical aided clarification and simple membrane filtration systems were used for water recovery. Closing the water loop through suitable treatment for reuse of wastewater in the paper mills provides an assured and continuous source of water. Pollutant reductions at the rate of 87.5%, 75% and 89% were obtained on SS, COD and turbidity, respectively.
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Toxic effect of hexavalent chromium on composting of segregated organic wastes(International Quarterly Journal of Life Sciences)
( S.U. Patki, SPM P. William, S.Y. Bodkhe, A.N. Vaidya, Vol. 3,,p. 651-658 ,Year : 2011)
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No information is available
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Recovery of P and Al from sewage sludge ash by a new wet chemical elution process (SESAL-Phos-Recovery Process)(Water Science and Technology)
(S. Petzet, B. Peplinski, S. Y. Bodkhe and P. Cornel,64(3),,p.693-699,Year : 2011)
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No information is available
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Effect of non-aqueous drilling fluid and its synthetic base oil on soil health as indicated by its dehydrogenase activity(Environmental Earth Sciences)
(Kanchan Wakadikar, Avik Sil, Niranjan Kolekar,Vol. 64(1):,,25-28 ,Year : 2011)
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Drilling fluids are used for drilling natural gas, oil and water wells. These spill over into the surrounding soil at the point of drilling, which may impair soil health. A laboratory investigation was carried out to determine the effect of non aqueous drilling fluid (NADF) and synthetic base oil used with it on soil health as indicated by the dehydrogenase activity. A non-sterile sandy loam soil was treated with different amounts of NADF and base oil at a rate of 800, 8,000 and 16,000 mg kg?1. Initially, reduction in dehydrogenase activity was observed, but it increased with the incubation time. On the 60th day of incubation dehydrogenase activity in untreated control was 1.04 mg TPF g?1 h?1 whereas in the soil samples treated with NADF and the base oil (16,000 mg kg?1), the activity was 1.53 mg TPF h?1 and 1.90 mg TPF h?1, respectively, which was 72 and 82% more than in untreated control. Base oil-treated soil showed more dehydrogenase activity than that observed with NADF. Both NADF and base oil stimulated the soil dehydrogenase activity.
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Influence of heating source on the efficacy of lignocellulosic pre-treatment - A cellulosic ethanol perspective(Biomass & Bioenergy)
( JagdishGabhane., SPM.Prince William., Atul Narayan Vaidya., KalyaniMahapatra., and TapanChakrabarti,35,,96-102,Year : 2011)
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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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Kinetics, Isotherms and Thermodynamics for the biosorption of Hg(II) onto Carica papaya(Bioremediation Journal)
( Z.V.P. Murthy and B. Jha , 26-34,,,Year : 2011)
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Carica papaya, a novel sorbent, was evaluated for sorption of Hg(II) from synthetic aqueous solutions using various pseudo-second order kinetic models as well as equilibrium sorption models. Batch kinetic and equilibrium experiments were carried out for the sorption of Hg(II) onto C. papaya at pH 6.5 and solid to liquid ratio (s/l) 1.0 g L?1. The kinetic data were fitted to second order models of Sobkowsk and Czerwinski, Ritchie, Blanchard, Ho and McKay, whereas Langmuir, Freundlich, and Redlich-Peterson models were used for the equilibrium data. A comparative study on both linear and nonlinear regression showed that the Sobkowsk and Czerwinski and Ritchie's second order model were the same. Ho and McKay's pseudo-second order model fitted well to the experimental data when compared with the other second order kinetic expressions. Langmuir isotherm parameters obtained from the four Langmuir linear equations by using linear method were dissimilar, but were the same when nonlinear method was used. Additionally, various thermodynamic parameters, such as ?G 0, ?H 0, and ?S 0, were calculated. The negative values of Gibbs free energy (?G 0) and ?H 0 confirmed the intrinsic nature of biosorption process and exothermic, respectively. The negative value of ?S 0 showed the decreased randomness at the solid-solution interface during biosorption.
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Photodegradation of famotidine by integrated photocatalytic adsorbent (IPCA) and kinetic study,(Catalysis Letters)
(David Keane, Kieran Nolan, Anne Morrissey, Michael Oelgemoller , John Tobin
,300-308,,,Year : 2011)
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Integrated photocatalytic adsorbents (IPCAs) comprised of nanocrystalline titanium dioxide (TiO2) and activated carbon (AC) were prepared using an ultrasonic impregnation technique. The IPCAs were characterised by scanning electron microscopy (SEM) and Fourier-transform infrared (FT-IR) spectroscopy and were employed as catalysts for the photodegradation of famotidine-an active pharmaceutical ingredient-in aqueous solutions using illumination from a 125 W medium pressure mercury lamp. The degradation kinetics were found to follow a pseudo-first-order rate law and varying TiO2 loadings induced different increases in the apparent first-order rate constant of the process. The kinetic behaviour can be described in terms of a modified Langmuir–Hinshelwood (LH) model. The IPCA prepared using a 10% TiO2 to AC loading exhibited the highest rate constant with a K C and k r of 0.0172 L/mg and 0.237 mg/L/min, respectively. The LH model fits the experimental data and elucidates the effect of the TiO2 content of the IPCA on the degradation rate. The use of calcination (heat treatment) in IPCA preparation and its effect on photocatalytic and adsorption performance were also investigated. The present work demonstrates that the combination of TiO2 and AC results in a promising material for application in the degradation of organic pollutants.
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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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Occurrence of pharmaceutical compounds in wastewater process streams in Dublin, Ireland(Environmental Monitoring and Assessment)
(Clair Lacey, Anne Morrissey, John Tobin
,,,1049-1062.,Year : 2011)
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The aim of this work is to establish baseline levels of pharmaceuticals in three wastewater treatment plant (WWTP) streams in the greater Dublin region to assess the removal efficiency of the selected WWTPs and to investigate the existence of any seasonal variability. Twenty compounds including several classes of antibiotics, acidic and basic pharmaceuticals, and prescribed medications were selected for investigation using a combination of membrane filtration, solid phase extraction (SPE) cleanup, and liquid chromatography-electrospray ionization tandem mass spectrometry. Fourteen of the selected compounds were found in the samples. Increased effluent concentrations, compared to influent concentrations, for a number of compounds (carbamazepine, clotrimazole, propranolol, nimesulide, furosemide, mefenamic acid, diclofenac, metoprolol, and gemfibrozil) were observed. The detected concentrations were generally below toxicity levels and based on current knowledge are unlikely to pose any threat to aquatic species. Mefenamic acid concentrations detected in both Leixlip and Swords effluents may potentially exert ecotoxicological effects with maximum risk quotients (i.e., ratio of predicted exposure concentration to predicted no effect concentration) of 4.04 and 1.33, respectively.
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