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Rice husk-based superplasticizer to increase performance of fly ash based geopolymer concrete(Emerging Materials Research)
(Ramesh Kumar Chouhan, Manish Mudgal, Abhishek Bisarya, Avanish Kumar Srivastava ,,,,Year : 2018)
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Workability is a major drawback of fly-ash-based geopolymers due to high viscosity. In this research, a new type of superplasticizer is developed to overcome this workability issue. Due to the high viscosity of geopolymeric binder structures, none of conventional superplasticizers was found effective in maintaining the viscosity of the mixture. The novel hybrid superplasticizer was developed by utilizing agrowaste-that is, rice husk-and an alkaline activator. Characterization studies [by X-ray diffraction, Fourier transform infrared spectroscopy and field emission scanning electron microscope] of the material indicated that the amorphous silica from rice husk reacts with the alkaline activator-that is, sodium hydroxide-and results in the in situ synthesis of sodium silicate and lignin. The developed superplasticizer was used in different percentages in fly-ash-based geopolymeric systems to study its engineering properties. The workability of the fresh geopolymer concrete was measured using the slump cone test method as per IS 1199-1959, while the compressive strength was evaluated as per IS 516-1959, and it is reported that the workability of the geopolymer concrete was improved significantly compared to that of conventional geopolymeric systems. In the present work, an attempt has also been made to establish a working mechanism for the developed superplasticizer with geopolymeric systems, which indicated its compatibility with [-Si-O-Al-O-] n networks.
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GIS based water quality indexing of Malad creek, Mumbai: an impact of sewage discharge(Journal of Environmental Science and Engineering)
(Ritesh Vijay, T. Bhattacharyya, R. Sharma, S. S. Dhage, R. A. Sohony,53,2,143-150,Year : )
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Malad creek is one of the most heavily polluted water bodies in Mumbai, India. Presently, creek receives wastewater and sewage from open drains and nallahs as well as partially treated wastewater from treatment facilities. The objective of the present study was to assess and classify the water quality zones spatially and temporally based on physico-chemical and bacteriological analysis. For this, GIS based methodology was integrated with water quality indexing, according to National Sanitation Foundation. Nine water quality parameters were considered to generate the indices that represent the overall status of creek water quality. Based on field observations and spatial distribution of water quality, various options were suggested for improvement in water quality of the creek.
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GIS based Site and Structure Selection Model for Groundwater Recharge: A Hydrogeomorphic Approach(Journal of Environmental Science and Engineering)
(Ritesh Vijay R. A. Sohony ,51,4,311-314,Year : 2009)
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The groundwater in India is facing a critical situation due to over exploitation, reduction in recharge potential by change in land use and land cover and improper planning and management. A groundwater development plan needs a large volume of multidisciplinary data from various sources. A geographic information system (GIS) based hydrogeomorphic approach can provide the appropriate platform for spatial analysis of diverse data sets for decision making in groundwater recharge. The paper presents development of GIS based model to provide more accuracy in identification and suitability analysis for finding out zones and locating suitable sites with suggested structures for artificial rechar
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Equilibrium adsorption studies of CO2, CH4, and N2 on amine functionalized polystyrene(Separation Science and Technology )
(KM Khot, PKKS Heer, RB Biniwale, VG Gaikar,49 15,,, 2376-2388,Year : 2014)
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No information is available
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200MW Chemical looping combustion based thermal power plant for clean power generation(International Journal of Energy Research)
(Sharma, R., Chandel, M. K., Delebarre, A. and Alappat, B.,37, ,, 49-58,Year : 2013)
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No information is available
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Nitric oxide absorption by hydrogen peroxide in airlift reactor: a study using response surface methodology(International Journal of Environmental Science and Technology)
(AD Bhanarkar, RK Gupta, RB Biniwale, SM Tamhane,11 (6), ,,1537-1548,Year : 2014)
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No information is available
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Design and development of Sustainable Remediation Process for Mitigation of Fluoride Contamination in Ground water and field Application for domestic Use(Science of the Total Environment)
(Subhash Andey, Poonam Gwala, Pranav Nagarnaik, Sarika Pimpalkar Ghosh, Prashant Pal, Prashant Deshmukh, Pawan Labhasetwar,,,,Year : 2012)
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No information is available
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Determining Heavy Metals Contamination in Road Dust in Delhi City, India(Atmosphere)
(B. S. Rajaram, P. V. Suryawanshi, C. V. Chalapati Rao
,29 ,Issue 3,221-234,Year : 2016)
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Road dust samples were collected from four different areas having different landuse patterns: industrial, heavy traffic, residential and mixed use in Delhi city of India. The samples were analyzed for Ba, Co, Cr, Cu Fe, Mn, Ni, Pb and Zn by ICP-AES. Results indicate high levels of Co, Cr, Cu, Mn and Ni in samples collected from industrial area. Ba, Pb and Zn showed higher concentration levels in heavy traffic area while Fe did not show any discernible variation between the localities. The concentrations of Fe, Mn, Ba, Zn, Cr, Cu, Pb, Ni and Co showed a decreasing trend. The content of heavy metals was comparable to those in other cities in the world. A multivariate statistical approach which includes Pearson's correlations and principal component analysis was used to identify the possible sources of metals in the road dust. Enrichment factors were estimated for further confirming the sources of contamination. Significant positively correlations between road dust metals Cu-Mn-Co-Cr-Ni suggest that major common source of origin is industrial activities. A meaningful correlation between Ba and Zn, and a moderate positive correlation between Pb and Ba indicate the influence of traffic activities. Enrichment factors calculation indicated that Pb, Cu, Cr and Zn are moderately enriched whereas Co, Ni and Mn are less enriched while Ba exhibited very low enrichment in the dust samples. The results indicate that industrial and vehicular traffic are the two major sources. Traffic appears to be responsible for the high levels of Zn, Cu and Ba. High concentration of Co, Cr, Cu and Mn may be due to industrial sources
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Occurrence and distribution of selected heavy metals and boron in ground water of Gulf of Khambhat region, Gujarat, India(Environl Sci Pollut Res)
(D. Upadhyaya, M.D Survaiya, S.Mandal, R. B. Thorat, S. Haldar, H.Dave, K.Baxi, R.H Trivedi and Kalpana Mody,,,3880-3890,Year : 2014)
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The concentration of selected heavy metals, like As, Co, Cr, Cu, Fe, Mn, Ni, Pb, and Zn as well as B, was measured by inductively coupled plasma-optical emission spectrometry (ICP-OES) in groundwater samples from various locations in the Gulf of Khambhat (GoK), an inlet of the Arabian Sea in the state of Gujarat, India, during post-monsoon, winter, and pre-monsoon seasons in a year. Most heavy elements are characterized by low mobility under slightly alkaline and reducing conditions; concentrations in confined aquifers are smaller than the maximum permissible values for drinking water. The temporal changes indicate that a majority of metals is entering the aquifer during monsoon. Principle component analysis of the heavy metal data suggests that Co, Cu, Cd, and Zn are interrelated with each other and derived significantly from anthropogenic route, while input of Pb and Cr may be due to atmospheric deposition in the study area. Both weathering of rocks and anthropogenic input were found to be main sources of elements in the groundwater. The heavy metal levels in groundwaters of the GoK region in comparison with some of the European and Asian sites were higher; however, these metal levels were found to be comparable with few urban sites in the world.
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Comparative Genomic studies for nderstanding the hypothetical proteins in Pseudomonas phages for understanding their co-evolution with Pseudomonas species(International Science Congress Association(ISCA) )
(K. Khairnar , R. Chandekar, S. Sanmukh, W.N. Paunikar,,,p. 1-113,Year : 2014)
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No information is available
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Size Measurement and Distribution of Dust Particles: Stone Crushing Industry(Indian Assocation of Environment Management)
( R.Jayabalou, Y.V.Subrahmanyam and N.Jothikumar,Vol. 26 (3),, p. 172-176,Year : 2016)
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No information is available
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Air Pollution modeling for an industrial complex and model performance evaluation(Journal of Environment Pollution Control)
( A.D.Bhanarkar, S.K. Goyal, S.K.Gadkari and A.L. Aggarwal ,Vol. 113,,p. 471-477,Year : 2016)
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No information is available
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Concentration and recovery of coliphages from water with bituminous coal(Water Environmental Research)
(Nishant Dafale, Sukumar Lakhe, K. Yadav, Hemant Purohit & Tapan Chakraborty
,80 3,,282-288,Year : 2008)
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Coliphages represent a process indicator for fecal pollution. The coal bed concentration method prepared for enterovirus was refined for a concentration of coliphages. A bed made from 1.5 g of 120-mesh coal powder was used for concentrating coliphage from 200 mL of a water sample with or without the addition of aluminum chloride at different pH values. The isolated E. coli strain EC-R8 was found to be more susceptible to the desired coliphage and showed significant coliphage-coliform response, with clear plaque used for further studies. The complete coliphage adsorption was achieved with the addition of 0.0005 M AICI3 at pH 6.0. Adsorbed coliphages were eluted with 3% beef extract in Mcllvaine buffer at pH 7.1, with an average recovery of 78.74%. This concentration technique was applied for the detection of coliphages from the well water of Nagpur city (India) and found to contain coliphages in the range of 2 to 28 plaque-forming units per liter (PFU/L). Water Environ. Res.,
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Removal of organic pollutants by peroxicoagulation(Environmental Chemistry)
( P.V. Nidheesh
,,,,Year : 2018)
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Peroxicoagulation is an electrochemical advanced oxidation processes in which both ferrous ions and hydrogen peroxide are generated in the cell.Organic pollutants are thus removed by degradation and coagulation. The peroxicoagulation process is a combination of electroFenton and electrocoagulation processes. The peroxicoagulation process is very eicient_for the removal of aniline and herbicides from water and for the treatment of landfll leachate and textile wastewaters. Under acidic conditions, electro- Fenton is the predominant removal means, whereas electrocoagulation is the main removal means under neutral and alkaline conditions. As a consequence, pH regulation toacidic conditions is essential for the mineralization of organic pollutants.
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Advanced oxidation processes for the treatment of chlorpyrifos, dimethoate and phorate in aqueous solution(Journal of Water Reuse and Desalination)
(Kavita Gandhi, Summaiya Lari, Dhananjay Tripathi and Gajanan Kanade,6 1 ,,195-203,Year : 2016)
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Photo-chemical-transformations of organophosphate pesticides, chlorpyrifos, dimethoate and phorate, using advanced oxidation processes (AOPs) namely UV photolysis, UV/H2O2, UV/Fenton and Fenton systems in aqueous solution were investigated in this work. A laboratory set-up was designed to evaluate and select the optimal oxidation process. Results show that addition of hydrogen peroxide/Fenton's reagent increased the UV degradation rates of all pesticides, and data were simulated through kinetic modeling. Kinetic results evidence pseudo first-order degradation, with the rate constant of reaction as 3.3 × 10-4, 2.07 × 10-2 and 1.88 × 10-2 for chlorpyrifos, dimethoate and phorate, respectively. Furthermore treatment efficiencies obtained for the studied AOPs indicate that UV/Fenton was most efficient for chlorpyrifos (50.3% degradation) and UV/H2O2 for dimethoate (96.9%) and phorate (89.6%). Finally, the identification of degradation products indicated that the UV/H2O2 technique results in the formation of fewer end products, with low toxicity. However, UV irradiation of phorate results in information of more toxic degradation end products such as phorateoxonsulfone.
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Synergistic effect of fly ash in- vessel-composting of biomass and kitchen waste(BioresourceTechnology)
(Manyapu, V., Mandpe, A., & Kumar S.,251, ,,114-120,Year : 2017)
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The present study aims to utilize coal fly ash for its property to adsorb heavy metals and thus reducing the bioavailability of the metals for plant uptake. Fly ash was incorporated into the in-vessel composting system along with organic waste. The in-vessel composting experiments were conducted in ten plastic vessels of 15 L capacity comprising varying proportions of biomass waste, kitchen waste and fly ash. In this study, maximum degradation of organic matter was observed in Vessel 3 having k value of 0.550 d?1. In vessel 10, 20% fly ash with a combination of 50% biomass waste and 30% kitchen waste along with the addition of 5% jaggery as an additive produced the best outcome with least organic matter (%C) loss and lowest value of rate constant (k).
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Characterization of polycyclic aromatic hydrocarbons in fugitive PM10 emissions from an integrated iron and steel plant(Science of the Total Environment)
(V.V. Khaparde, A.D. Bhanarkar, Deepanjan Majumdar, C.V. Chalapati Rao,562 (2016) ,,155–163,Year : 2016)
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Fugitive emissions of PM10 (particles b10 ?m in diameter) and associated polycyclic aromatic hydrocarbons (PAHs) were monitored in the vicinity of coking unit, sintering unit, blast furnace and steel manufacturing unit in an integrated iron and steel plant situated in India. Concentrations of PM10, PM10-bound total PAHs, benzo (a) pyrene, carcinogenic PAHs and combustion PAHs were found to be highest around the sintering unit. Concentrations of 3-ring and 4-ring PAHs were recorded to be highest in the coking unit whereas 5-and 6-ring PAHs were found to be highest in other units. The following indicatory PAHs were identified: indeno (1,2,3-cd) pyrene, dibenzo (a,h) anthracene, benzo (k) fluoranthene in blast furnace unit; indeno (1,2,3-cd) pyrene, dibenzo (a,h) anthracene, chrysene in sintering unit; Anthracene, fluoranthene, chrysene in coking unit and acenaphthene, fluoranthene, fluorene in steel making unit. Total-BaP-TEQ (Total BaP toxic equivalent quotient) and BaP-MEQ (Total BaP mutagenic equivalent quotient) concentration levels ranged from 2.4 to 231.7 ng/m3 and 1.9 to 175.8 ng/m3, respectively. BaP and DbA (dibenzo (a,h) anthracene) contribution to total-BaP-TEQ was found to be the highest.
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Feasibility Studies for Development of Cement Free Fly Ash Based Geopolymer Mortar Using Potassium Based Alkaline Activator(International Research Journal of Engineering and Technology)
(Kritika Keshari, Manish Mudgal, Ramesh Kumar Chouhan, Abhishek Bisarya,5,4,,Year : 2018)
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industrial waste in abundant quantity, like fly ash, red mud, etc. In this study class F fly ash sample which has been used was obtained from Satpura Thermal Power Plant, Sarni, Betul (M.P.). In this study potassium based alkaline activator (Combination of potassium hydroxide and potassium silicate) was used. In this research work the molarity of the solution was kept constant to be 16 and ratio of K2SiO3:KOH was varied. The ratios of K2SiO3:KOH adopted were 0.25, 0.50, 1.00, 1.50, 2.00, and 2.50. For each batch 15 cubes of sizes 7.06cm x 7.06cm x 7.06 cm were casted for each trial out of which 12 cubes were oven cured in Hot Air Oven at 60°C for 48 hours and the remaining 3 cubes were left for the ambient drying. For compressive strength testing, 3 cubes each were tested at 3, 7, 14 and 28 days respectively and the average of 3 cubes was taken as the compressive strength. It was found that initially on increasing the ratio of K2SiO3:KOH the compressive strength was increased but beyond ratio 0.50 the compressive strength was decreased. The compressive strength using 0.50 ratio of K2SiO3:KOH was found to be 85.20 MPa for oven curing at 60°C for 48 hours at 28 days of aging and 59.10 MPa for ambient curing at 28 days of aging where solution: fly ash ratio 0.27.
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GIS for Municipal Solid Waste Management(Journal of Indian Association for Environment Management)
(Ritesh Vijay and Apurba Gupta,35,1,20-22,Year : 2008)
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No information is available
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Biodegradation of Methyl Orange by alginate-immobilized Aeromonas sp. in a packed bed reactor: external mass transfer modeling(Bioprocess and Biosystems Engineering)
(Mathur Nadarajan Kathiravan,
Siluvai Antony Praveen,
Geun Ho Gim,
Gui Hawn Han,
Si Wouk Kim,Volume 37,Issue 11,p 2149-2162,Year : 2014)
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https://doi.org/10.1007/s00449-014-1192-7
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