Physico-chemical study for zinc removal and recovery onto native/chemically modified Aspergillus flavus NA9 from industrial effluent

Aftab, Kiran; Akhtar, Kalsoom; Jabbar, Abdul; Bukhari, Iftikhar Hussain; Noreen, Razia

doi:10.1016/j.watres.2013.04.051

Cited by 26 publications

(5 citation statements)

References 20 publications

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“…To estimate other uptake mechanism further, the difference between (Cd(II)) uptake and (Ca, Mg) release amounts was calculated with the results shown in Figure 8. It is observed that this difference is relative low (<0.12 mmol/g) at 2 h, but increases rapidly to approximately 0.40 mmol/g at 4 h, indicative of the occurrence of other uptake mechanisms such as precipitation or complexation (Aftab et al, 2013).

\begin{matrix} left \\ Ion exchange : \\ \equiv C a C O_{3} + 0.33 C d^{2 +} \to \equiv (C a_{0.67}, C d_{0.33}) C O_{3} + 0.33 C a^{2 +} \end{matrix}

Precipitation : C O_{3}^{2 -} + C d^{2 +} \to C d C O_{3} ↓

…”

Section: Resultsmentioning

confidence: 99%

Uptake of Cd(II) Onto Raw Crab Shells: Isotherm, Kinetic, Adsorption Properties And Mechanisms

Zhou

Gong

Zhang

et al. 2017

Water Environment Research

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This study focuses on the uptake of cadmium (Cd(II)) ion from water onto raw crab shells acting as a biosorbent. Experimental data were perfectly fitted to the Langmuir and Dubinin-Radushkevich models, while the uptake kinetics are well-described using the pseudo-second-order model. The effects of experimental conditions on the uptake isotherms and kinetics are discussed in detail. A study of uptake thermodynamics has indicated that the Cd(II) uptake onto the crab shell is an endothermic and spontaneous process. For further understanding of this process, possible mechanisms of Cd(II) uptake onto crab shell have been deduced from experimental results. Desorption experiment shows that 93.7% of adsorbed Cd(II) could be recovered with a 0.1 M HNO3 solution. The inhibitory effects of other metal co-ions on the Cd(II) uptake on the crab shell are also discussed.

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\begin{matrix} left \\ Ion exchange : \\ \equiv C a C O_{3} + 0.33 C d^{2 +} \to \equiv (C a_{0.67}, C d_{0.33}) C O_{3} + 0.33 C a^{2 +} \end{matrix}

Precipitation : C O_{3}^{2 -} + C d^{2 +} \to C d C O_{3} ↓

…”

Section: Resultsmentioning

confidence: 99%

Uptake of Cd(II) Onto Raw Crab Shells: Isotherm, Kinetic, Adsorption Properties And Mechanisms

Zhou

Gong

Zhang

et al. 2017

Water Environment Research

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“…FTIR analysis was performed to identify the main functional groups and to study their evolution during biosorption process. This technique has proved effective in obtaining structural information on metal-microbe bonds [ 32 ]. The results for Klebsiella sp.…”

Section: Resultsmentioning

confidence: 99%

Biosorption of Pb(II) Ions byKlebsiellasp. 3S1 Isolated from a Wastewater Treatment Plant: Kinetics and Mechanisms Studies

Muñoz

Cara

Moya

et al. 2015

BioMed Research International

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Lead biosorption by Klebsiella sp. 3S1 isolated from a wastewater treatment plant was investigated through a Rotatable Central Composite Experimental Design. The optimisation study indicated the following optimal values of operating variables: 0.4 g/L of biosorbent dosage, pH 5, and 34°C. According to the results of the kinetic studies, the biosorption process can be described by a two-step process, one rapid, almost instantaneous, and one slower, both contributing significantly to the overall biosorption; the model that best fits the experimental results was pseudo-second order. The equilibrium studies showed a maximum lead uptake value of 140.19 mg/g according to the Langmuir model. The mechanism study revealed that lead ions were bioaccumulated into the cytoplasm and adsorbed on the cell surface. The bacterium Klebsiella sp. 3S1 has a good potential in the bioremoval of lead in an inexpensive and effective process.

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“…The capacities maintained the same level after regeneration (only Cd 2+ and Cu 2+ were studied). Zinc could be desorbed from Aspergillus flavus using 0.01M HCl with 83.3% elution efficiency and with 23.5% loss in biosorption capacity after five adsorption-desorption cycles [64]. Sodium hydroxide (5M) was able to desorb 81% of Cr 3+ from B. subtilis biomass [51].…”

Section: Biosorption Capacities Of Side Stream Biomassesmentioning

confidence: 99%

“…The related challenges recognized in the present good lead biosorption performance of spent mushroom Tricholoma lobayense using wastewaters of sewage treatment plant and a storage battery manufacturer. Aftab et al [64] investigated the use of Aspergillus flavus NA9 for zinc removal from paint industry effluents, achieving a biosorption capacity of 16.2 mg/g. research and the weights of their probable impacts on biosorption applications are summarized in the Table 6.…”

Section: Applicability Of Microbial Side Streams For Biosorptionmentioning

confidence: 99%

Utilization of Industrial Microbe Side Streams for Biosorption of Heavy Metals from Wastewaters

Taskila¹,

Leiviskä²,

Haapalainen³

et al. 2015

J Bioremed Biodeg

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The present report reviews the potential and applicability of industrial microbe side streams produced in Finnish bioprocess industries for biosorption of heavy metals from wastewaters. Microbial side stream biomasses are formed worldwide in e.g. food, brewing, biofuel, pharmaceuticals, wood processing and enzyme manufacturing industries. Although these streams are typically used for low-valued animal feed or biogas production, they would also have potential for biosorbent materials to be used in in situ water treatment. Since major challenges have been recognized, especially regarding the availability of biomass, and to logistic and processing cost, biosorption is not the most economically attractive option for the use of these biomasses at the moment. However, in the future the situation may change due to new incentives or more cost-efficient biosorbent preparation technologies. This report will provide a knowledge basis for the consideration of biosorption applications for industrial microbe side streams. Journal of Bior emediation & Biodegradation Yeast fermentationsEthanol fermentation process consists of several unit operations to convert carbohydrates into ethanol by S. cerevisiae. This technology is employed worldwide in production of alcoholic beverages and bioethanol. After brewing the yeast cells are collected from the bottom of tank or separated by centrifugation to form slurry of 20-50% solids [6]. Loose slurries are further concentrated by filtration after which they are thermally disrupted at around 80°C and optionally also with organic acids. The production capacity of major Finnish breweries is over 400 million l/a [7] and the respective quantity of formed yeast containing residues is approximately 2000 t/a.Bioethanol is produced by St1 Biofuels Oy in quantity of 13,000 t/a in Lahti, Vantaa, Hamina, Jokioinen and Hämeenlinna. Ethanol is further concentrated at Hamina. These production sites produce altogether over 75,000 t/a of residues that contain also yeast cells. Hämeenlinna plant directs all organic residues to biogas production [8] while the other plants produce also animal feed. The amount of produced feed is over 45,000 t/a [9][10][11][12]. The company has also been appointed an environmental permit in 2013 for production of lignocellulose ethanol in Kajaani [13]. Yeast residues of the process together with other residues would be directed to energy production. Enzyme productionThe main steps in enzyme production processes are medium preparation, inoculum preparation, inoculation and fermentation, cell removal, product purification and concentration, and formulation. The nature of produced enzyme affects also properties of microbial residues. Extracellular enzymes are recovered from the fermentation broth after removal of cells which remains the cells intact. Cell removal is conducted using filter press together with filter aids and flocculants. On the contrary, intracellular products are recovered via disruption of cells by chemical or mechanical methods, after which cell debri...

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Physico-chemical study for zinc removal and recovery onto native/chemically modified Aspergillus flavus NA9 from industrial effluent

Cited by 26 publications

References 20 publications

Uptake of Cd(II) Onto Raw Crab Shells: Isotherm, Kinetic, Adsorption Properties And Mechanisms

Uptake of Cd(II) Onto Raw Crab Shells: Isotherm, Kinetic, Adsorption Properties And Mechanisms

Biosorption of Pb(II) Ions byKlebsiellasp. 3S1 Isolated from a Wastewater Treatment Plant: Kinetics and Mechanisms Studies

Utilization of Industrial Microbe Side Streams for Biosorption of Heavy Metals from Wastewaters

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