Kinetic modelling of the uranium biosorption by Deinococcus radiodurans biofilm

Manobala, T.; Shukla, Sudhir K.; Rao, T. Subba; Kumar, M. Dharmendira

doi:10.1016/j.chemosphere.2020.128722

Cited by 43 publications

(6 citation statements)

References 67 publications

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“…The comparable amounts of Mg²⁺ and K⁺ adsorbed by both intact and autoclaved biofilms underscore the resilience of the biofilm structure and its capacity to function as a biosorbent even after undergoing thermal treatment. This finding suggests that while autoclaving effectively eliminates live microbial components, it does not significantly alter the biofilm's ability to bind ions [Manobala et al, 2021]. The preservation of ion-binding active sites within the biofilm matrix and microbial cell walls post-autoclaving contributes to the sustained biosorption capabilities observed in autoclaved biofilms.…”

Section: Adsorption Abilitymentioning

confidence: 89%

Comparative Biosorption Proficiency in Intact and Autoclaved Biofilm Matrices

Kurniawan,

Pramudia,

Susanti

et al. 2024

J. Ecol. Eng.

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The urgent need for technological innovation to combat water pollution underscores the significance of biosorption as a potential solution. The success of biosorption hinges on the careful selection of a suitable biosorbent. Biofilms, composed of microbial communities, emerge as a promising alternative due to their expansive adsorption capacity and ready availability. In practical applications, biosorption is often executed at pollutant concentrations lethal to microbes. Consequently, comprehending the biosorption potential of biofilms with deceased microbes becomes imperative. Notably, biofilms with deceased microbes offer the added advantage of minimizing the risk of pathogenic microbial contamination. Despite this, studies are scarce comparing biosorption between intact biofilms and those with deceased microbes. This comparative analysis could enhance the feasibility of biofilms in biosorption as an eco-aquatic technology for alleviating aquatic pollution. This study aims to scrutinize the biosorption characteristics of intact biofilm (with living microbes) and autoclaved biofilm (with deceased microbes). The methods employed for analyzing biosorption characteristics encompass examining electric charge properties, FTIR spectra analysis, ion adsorption, and ion desorption. The model ions chosen for this study are K⁺ (monovalent ion) and Mg²⁺ (divalent ion). Results indicate that the biofilm's electric charge properties and adsorption capacity remain relatively unchanged post-autoclaving. Based on these findings, it can be concluded that biofilms, whether intact or autoclaved, present substantial potential as biosorbents in the advancement of eco-aquatic technology for mitigating water pollution.

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Section: Adsorption Abilitymentioning

confidence: 89%

Comparative Biosorption Proficiency in Intact and Autoclaved Biofilm Matrices

Kurniawan,

Pramudia,

Susanti

et al. 2024

J. Ecol. Eng.

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“…The third stage was the final equilibrium adsorption. When the biosorbent exterior surface reached saturation, the metal ions entered the pore within the biomass particle and were adsorbed by the interior surface of the particle [36]. Comparing the intraparticle diffusion rate constants, it was obvious that kp1 (first stage) >kp2 (second stage) >kp3 (third stage).…”

Section: Intraparticle Diffusion Modelmentioning

confidence: 99%

Isothermal and Kinetic Studies of Biosorption of Low Concentration Cr(III) from Aqueous Solution by 4 Microbial Biosorbents

Wang¹,

Zhong²,

Li³

et al. 2022

Pol. J. Environ. Stud.

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This study investigated the biosorption characteristics of low concentration Cr(III) by four biosorbents of microbial powders (TP, XB, MY and TQ). All biosorbents showed promising sorption efficiency towards Cr(III). The results of SEM and FTIR showed that the gaps of the adsorbent surface were filled, and the groups of hydroxyl, carboxyl, polyglucose, amine, phosphoric acid, and sulfur functional groups played an important role. The equilibrium adsorption capacity of TP, XB, MY, and TQ were achieved by 6.92, 10.35, 9.20 and 8.72 mg/g, respectively. The data of isotherm models (Langmuir, Freundlich, Temkin and Dubimim-Radushkevich isotherm models) revealed that TP, MY and TQ were fitted well with the Langmuir model which means the adsorption functional group or activity site on the surface was monolayer; XB was fitted well with Temkin model which means that the surface coverage of adsorbent increased while the adsorption heat decreased linearly. The Lagergren model and intraparticle diffusion model were used to present the kinetic process, the results showed that the biosorption process for all the studied adsorbent followed three phases: rapid phase, slow phase, and equilibrium. The first phase was the rate-controlling one. Moreover, the four biosorbents were regenerated by desorption and still had adsorption performance after four times of reuse. We proved that the four biosorbents can be feasible biomass for the removal of low concentration Cr(III) from aqueous solutions.

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“…where Q t is the adsorbed quantity (mg/g) at time t, and K id (mg/g × t 0.5 ) is the rate constant [49]. The intra-particle diffusion model parameters are provided in Table 9, according to the linear plots of Q t vs. t 0.5 .…”

Section: The Intra-particle Diffusion Modelmentioning

confidence: 99%

Isotherm, Thermodynamics, and Kinetics of Methyl Orange Adsorption onto Magnetic Resin of Chitosan Microspheres

et al. 2022

IJMS

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Severe environmental pollution problems arising from toxic dyestuffs (e.g., methyl orange) are receiving increasing attention. Therefore, dyes’ safe removal has become a research hotspot. Among the many physical–chemical removal techniques, adsorption using renewable biological resources has proved to be more advantageous over others due to its effectiveness and economy. Chitosan is a natural, renewable biopolymer obtained by deactivated chitin. Thus, the magnetic resin of chitosan microspheres (MRCM), prepared by reversed-phase suspension cross-linking polymerization, was used to remove methyl orange from a solution in a batch adsorption system. The main results are as follows: (1) The results of physical and swelling properties of MRCM indicated that MRCM was a type of black spherical, porous, water-absorbing, and weak alkali exchange resin, and it had the ability to adsorb methyl orange when it was applied in solutions above pH 2.0. (2) In batch adsorption studies, the maximum adsorption capacity was obtained at pH 5; the adsorption equilibrium time was 140 min; and the maximum adsorption was reached at 450 mg/L initial concentration. (3) Among the three isotherm adsorption models, Langmuir achieved the best fit for the adsorption of methyl orange onto MRCM. (4) The adsorption thermodynamics indicated that the adsorption was spontaneous, with increasing enthalpy, and was driven by the entropy. (5) The pseudo-second-order kinetics equation was most suitable to describe the adsorption kinetics, and the adsorption kinetics was also controlled by the liquid–film diffusion dynamics. Consequently, MRCM with relatively higher methyl orange adsorption exhibited the great efficiency for methyl orange removal as an environment-friendly sorbent. Thus, the findings are useful for methyl orange pollution control in real-life wastewater treatment applications.

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Kinetic modelling of the uranium biosorption by Deinococcus radiodurans biofilm

Cited by 43 publications

References 67 publications

Comparative Biosorption Proficiency in Intact and Autoclaved Biofilm Matrices

Comparative Biosorption Proficiency in Intact and Autoclaved Biofilm Matrices

Isothermal and Kinetic Studies of Biosorption of Low Concentration Cr(III) from Aqueous Solution by 4 Microbial Biosorbents

Isotherm, Thermodynamics, and Kinetics of Methyl Orange Adsorption onto Magnetic Resin of Chitosan Microspheres

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