Nagy Boldizsar

Babes-Bolyai University, Faculty of Chemistry and Chemical Engineering, PhD Student, an, researcher

Babes-Bolyai University, Chemistry, Graduate Student

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3rd year PhD student
Supervisors: Majdik Cornelia, Luminita Silaghi-Dumitrescu, and Andrada Maicaneanu
Address: Arany Janos st, Cluj Napoca, Romania

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Bu-Ali Sina University

Slavka Stanković

Ramalingam Chidambaram

VIT University

Sana Sadaf

high nani

Université Cadi Ayyad

Jaka Sunarso

Swinburne University of Technology, Sarawak

Mustafa Gazi

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Comparative study of Cd (II) biosorption on cultivated Agaricus bisporus and wild Lactarius piperatus based biocomposites. Linear and nonlinear equilibrium modelling and kinetics

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Biosorption of Cadmium Ions by Unmodified, Microwave and Ultrasound Modified Brewery and Pure Strain Yeast Biomass

The present study investigates the biosorption of cadmium ions from aqueous solution onto unmodif... more The present study investigates the biosorption of cadmium ions from aqueous solution onto unmodified, ultrasound and microwave treated cells of Saccharomyces cerevisiae. FTIR analysis was conducted to characterize the biosorbent. Equilibrium and kinetic studies of unmodified RBW (residual brewery waste) cell yeast and DSM 1333 (pure strain) were conducted by considering the effect of initial cadmium ions concentration. Results showed that the ultrasound and microwave treatments decrease the heavy metal uptake compared with the unmodified biomass. Langmuir and Freundlich isotherm models on both unmodified yeast cell types were used to analyze the equilibrium data. It was found that the Langmuir isotherm and pseudo-second-order kinetics models describe better the cadmium ions removal process.

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Cadmium (II) Ions Removal from Aqueous Solutions Using Romanian Untreated fir Tree Sawdust – a Green Biosorbent

Biosorption of cadmium ions from synthetic aqueous solution using popular Romanian fir tree sawdu... more Biosorption of cadmium ions from synthetic aqueous solution using popular Romanian fir tree sawdust (Abies Alba) as biosorbent, was investigated in this work. Prior to its utilization the considered biomass was washed, dried and sieved without further chemical treatments. The biosorbent was characterized using humidity, density and elemental analysis determinations and FTIR. FTIR analysis indicated that, on the biomass surface hydroxyl and carboxyl groups are presented. The effect of different biosorption parameters was studied. Higher biomass quantity, neutral pH, slightly elevated temperature and high cadmium ions concentration are all favouring the biosorption process. Equilibrium (Langmuir and Freundlich isotherm), kinetics and thermodynamics of the considered biosorption process were discussed in details. Equilibrium was best described by the Langmuir isotherm, while the kinetic of the process was best described by the pseudo-second-order model, suggesting monolayer coverage and a chemisorption process. Thermodynamic parameters showed that cadmium biosorption process on fir tree sawdust is an endothermic process. Zn 2+ and Ca 2+ from the binding sites of certain enzymes. Over the past 10 years, extensive research has been carried out to identified new and economically priced adsorbent for cadmium ions removal/preconcentration such as different types of algae, 12-16 yeast biomass, 17,18 rice husk, 19 mushrooms, 20 orange peels, 21 papaya wood, 22 pine bark, 23 aquatic moss, 24,25 tea waste 26 and various types of sawdust. As we know, the sawdust is a solid by-product abundant, inexpensive and not enough exploited material, obtained from mechanical wood processing, which can be used as biosorbent for removing different heavy metals, cadmium (II) in particular, from aqueous waste solutions. The adsorption of heavy metals by these types of materials might be attributed to their lignin, cellulose and hemicellulose, which have proteins, carbohydrates and polyphenolic compounds with carboxyl, hydroxyl, sulphate, phosphate and amino groups that can bind metal ions. Abies Alba fir is a common tree from some forest areas in Transylvania (Romania). These trees are the main source in the local wood industry and their sawdust could be a good candidate as a green and economic alternative for Cd (II) removal from wastewater. The sawdust was evaluated without any chemical pretreatment.

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Comparative study of Cd (II) biosorption on cultivated Agaricus bisporus and wild Lactarius piperatus based biocomposites. Linear and nonlinear equilibrium modelling and kinetics

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Biosorption of Cadmium Ions by Unmodified, Microwave and Ultrasound Modified Brewery and Pure Strain Yeast Biomass

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Cadmium (II) Ions Removal from Aqueous Solutions Using Romanian Untreated fir Tree Sawdust – a Green Biosorbent

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