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Enhancing adsorption of nitrate using metal impregnated alumina
No full textThe adsorption capacity and selectivity are vital for designing economically feasible treatment system for
drinking water. This work is aimed at enhancing the selectivity of nitrate adsorption through metal
impregnation. Impregnation of Mg, Fe, Co, Ni, Zn and Cu on alumina was investigated. Nickel
impregnation was found to be the best, with an increase in 13 times the nitrate adsorption capacity
compared to unmodified alumina. The optimal pH for nitrate adsorption using nickel-modified alumina
was in a wide range from 3 to 7. The nitrate adsorption capacity was not influenced by the presence of
fluorides and phosphates, whereas carbonates and sulphates were found to decrease the adsorption
capacity by 50%. The adsorbents were also tested on drinking water samples from Madhya Pradesh, India.
The nitrate adsorption capacity of nickel-impregnated alumina was still 10 times higher compared to the
bare adsorbent
Free iron status & insulin resistance in type 2 diabetes mellitus: Analyzing the probable role of a peanut protein
Get PDFCharacterization and Source Identification of PM bound Polycyclic Aromatic Hydrocarbon (PAHs) in Semi-Arid Region of India
Get PDFRespirable particulate (PM10) and particulate phase polycyclic aromatic hydrocarbons (PAHs) in ambient air were
measured by collecting samples during winter, summer and post-monsoon season at rural environment in north-western part
of India. The concentration of 8 selected PAHs, Acenaphthene (Ace), Fluorene (Flu), Phenanthrene (Phen), Anthracene
(Anth), Fluoranthene (Flt), Pyrene (Pyr), Chrysene (Chr), Benzo[a]pyrene (BaP) were quantified and characterized for
different seasons. The ratio of average total PAHs concentration of winter to summerand winter to post-monsoon were
assessed for rural environment was 5.7 and 6.4 for summer and pot-monsoon season respectively which is in agreement with
the general trend of 1.5-10. The four membered ring PAHs were predominant and contributed to about 62% of total PAHs
during winter season. A correlation study was performed among selected PAHs for source identification for all the three
seasons. The results are in agreement with the traditional method of burning biomass, wood, coal and agricultural waste for
cooking, a practice still followed in rural environmen
An Assembly for a Ceiling Fan as a Power Generation Unit and a method thereof.
No full textThe present invention relates to a specially designed generator comprises of an Rotor with embedded magnets and a Stator wound
with conducting coils, is fitted to Hanging Rod of Ceiling Fan. The rotational energy of the Ceiling Fan is utilized to drive the system.
The energy thus generated can be directly used or can be stored in a battery for other us
ANTIBIOFOULING BIOMATERIALS
Get PDFAntifouling refers to the process of control of fouling which occurs on liquid-solid surfaces. The term
‘fouling’ indicates an undesirable natural succession process during biofilm formation, in which a
submerged surface or membranes becomes encrusted with material from the surrounding environment.
It mainly involves microorganisms and their by-products developed on the surface by conditioning,
attachment, biofilm formation followed by colonization. The accumulation of micro and macrofoulers
on immersed structures results in economic as well as environmental losses. It is one of the major
vulnerable problems currently disturbing many ecological niches as well as in shipping and other
industrial aquatic processes. The existence of natural antifouling agents or biomaterials provides
sustainable eco-friendly control and hence remains a challenge for future researchers. The use of
biological tools for control of fouling is gaining importance day by day
Metabolism of Long Chain Fatty Acids (LCFAs) in Methanogenesis
No full textAnaerobic digestion (AD) is an important process for generating third generation fuel in the form of methane from a variety of organic wastes. Efficiency of AD is dependent on inhibitory effect exerted by the substrate on methanogenic pathway. Here we assess the potential of utilizing lipid rich waste as suitable substrate for methane production. Anaerobic digestion of lipids leads to production of long chain fatty acids (LCFAs) which are known to inhibit acetoclastic bacteria and methanogens. The problems faced during AD of lipid rich waste, strategies for overcoming the problems and application of genomic tools for characterization of microbial community involved in biomethanation of this substrate is also discussed
Enhancing adsorption of nitrate using metal impregnated alumina
No full textThe adsorption capacity and selectivity are vital for designing economically feasible treatment system for
drinking water. This work is aimed at enhancing the selectivity of nitrate adsorption through metal
impregnation. Impregnation of Mg, Fe, Co, Ni, Zn and Cu on alumina was investigated. Nickel
impregnation was found to be the best, with an increase in 13 times the nitrate adsorption capacity
compared to unmodified alumina. The optimal pH for nitrate adsorption using nickel-modified alumina
was in a wide range from 3 to 7. The nitrate adsorption capacity was not influenced by the presence of
fluorides and phosphates, whereas carbonates and sulphates were found to decrease the adsorption
capacity by 50%. The adsorbents were also tested on drinking water samples from Madhya Pradesh, India.
The nitrate adsorption capacity of nickel-impregnated alumina was still 10 times higher compared to the
bare adsorbent
Chemical Looping Combustion of Rice Husk
Get PDFA thermodynamic investigation of direct chemical looping combustion (CLC) of rice husk is presented in this paper. Both steam and CO2 are used for gasification within the temperature range of 500–1200˚C and different amounts of oxygen carriers. Chemical equilibrium model was considered for the CLC fuel reactor. The trends in product compositions of the fuel reactor, were determined. Rice husk gasification using 3 moles H2O and 0 moles CO2 per mole carbon (in rice husk) at 1 bar pressure and 900˚C was found to be the best operating point for hundred percent carbon conversion in the fuel reactor. Such detailed thermodynamic studies can be useful to design chemical looping combustion processes using different fuels