85 research outputs found
Kinetics of biodegradation of diethylketone by Arthrobacter viscosus
The performance of an Arthrobacter
viscosus culture to remove diethylketone from aqueous
solutions was evaluated. The effect of initial
concentration of diethylketone on the growth of the
bacteria was evaluated for the range of concentration
between 0 and 4.8 g/l, aiming to evaluate a possible
toxicological effect. The maximum specific growth
rate achieved is 0.221 h-1 at 1.6 g/l of initial
diethylketone concentration, suggesting that for
higher concentrations an inhibitory effect on the
growth occurs. The removal percentages obtained
were approximately 88%, for all the initial concentrations
tested. The kinetic parameters were estimated
using four growth kinetic models for biodegradation
of organic compounds available in the literature. The
experimental data found is well fitted by the Haldane
model (R2 = 1) as compared to Monod model
(R2 = 0.99), Powell (R2 = 0.82) and Loung model
(R2 = 0.95). The biodegradation of diethylketone
using concentrated biomass was studied for an initial
diethylketone concentration ranging from 0.8–3.9 g/l
in a batch with recirculation mode of operation. The
biodegradation rate found followed the pseudo-second
order kinetics and the resulting kinetic parameters
are reported. The removal percentages obtained
were approximately 100%, for all the initial concentrations
tested, suggesting that the increment on the
biomass concentration allows better results in terms
of removal of diethylketone. This study showed that
these bacteria are very effective for the removal of
diethylketone from aqueous solutions.The authors would like to gratefully acknowledge the financial support of this project by the Fundacao para a Ciencia e Tecnologia (FCT), Ministerio da Ciencia e Tecnologia, Portugal and Fundo Social Europeu (FSE). Cristina Quintelas thanks FCT for a Post-Doc grant
Detection analysis of surface hydroxyl active sites and simulation calculation of the surface dissociation constants of aqueous diatomite suspensions
Occurrence and removal characteristics of phthalate esters from bottled drinking water using silver modified roasted date pits
Surface complexation modeling calculation of Pb(II) adsorption onto the calcined diatomite
Hydrothermally treated aluminosilicate clay (HTAC) for remediation of fluoride and pathogens from water: Adsorbent characterization and adsorption modelling
Highly efficient and rapid removal of a toxic dye: Adsorption kinetics, isotherm, and mechanism studies on functionalized multiwalled carbon nanotubes
A facile yet versatile method for adsorption and relayed fluorescent detection of heavy metal ions
Facile preparation of amino-functionalized polymeric microcapsules as efficient adsorbent for heavy metal ions removal
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