scholarly journals Application of Saccharomyces cerevisiae/Calcium Alginate Composite Beads for Cephalexin Antibiotic Biosorption from Aqueous Solutions

Materials ◽  
2021 ◽  
Vol 14 (16) ◽  
pp. 4728
Author(s):  
Lăcrămioara Rusu ◽  
Cristina-Gabriela Grigoraș ◽  
Andrei-Ionuț Simion ◽  
Elena Mirela Suceveanu ◽  
Daniela Șuteu ◽  
...  
Keyword(s):  
Saccharomyces Cerevisiae ◽  
Aqueous Solutions ◽  
Calcium Alginate ◽  
Low Cost ◽  
Natural Polymers ◽  
Initial Concentration ◽  
Biosorption Capacity ◽  
Composite Beads ◽  
Capacity Evaluation ◽  
Batch Biosorption

Cephalexin (CPX) is recognized as a water pollutant, and it has been listed in a number of countries with a risk factor greater than one. Herein, the present work focused on the synthesis, characterization and biosorption capacity evaluation of Saccharomyces cerevisiae immobilized in calcium alginate as a biosorbent to remove CPX from aqueous solutions. Biosorbent was characterized by SEM and FTIR techniques. Batch biosorption experiments were conducted in order to evaluate the effect of the initial pH, biosorbent dose and CPX initial concentration. The removal efficiency, in considered optimal conditions (pH = 4, CPX initial concentration = 30 mg/L, biosorbent dose = 1 g/L) was 86.23%. CPX biosorption was found to follow the pseudo–second-order kinetics. The equilibrium biosorption data were a good fit for the Langmuir model with correlation coefficient of 0.9814 and maximum biosorption capacity was 94.34 mg/g. This study showed that the synthesized biosorbent by immobilization technique is a low-cost one, easy to obtain and handle, eco-friendly, with high feasibility to remove CPX antibiotic from aqueous solution. The findings of this study indicate that the biosorbents based on microorganisms immobilized on natural polymers have the potential to be applied in the treatment of wastewater.

Biosorption of As(V) from aqueous solutions by living cells of Bacillus cereus

2012 ◽  
Vol 66 (8) ◽  
pp. 1699-1707 ◽  
Author(s):  
A. K. Giri ◽  
R. K. Patel ◽  
P. C. Mishra
Keyword(s):  
Aqueous Solutions ◽  
Bacillus Cereus ◽  
Contact Time ◽  
Living Cells ◽  
Optimum Conditions ◽  
Order Model ◽  
Initial Concentration ◽  
Pseudo Second Order ◽  
Biomass Dosage ◽  
Batch Biosorption

In this work, the biosorption of As(V) from aqueous solutions by living cells of Bacillus cereus has been reported. The batch biosorption experiments were conducted with respect to biosorbent dosage 0.5 to 15 g/L, pH 2 to 9, contact time 5 to 90 min, initial concentration 1 to 10 mg/L and temperature 10 to 40 °C. The maximum biosorption capacity of B. cereus for As(V) was found to be 30.04 at pH 7.0, at optimum conditions of contact time of 30 min, biomass dosage of 6 g/L, and temperature of 30 ± 2 °C. Biosorption data were fitted to linearly transformed Langmuir isotherms with R2 (correlation coefficient) >0.99. Bacillus cereus cell surface was characterized using AFM and FTIR. The metal ions were desorbed from B. cereus using both 1 M HCl and 1 M HNO3. The pseudo-second-order model was successfully applied to predict the rate constant of biosorption.

Cellulose/Collagen Beads Prepared Using Ionic Liquid for Cu(II) Adsorption from Aqueous Solutions

2012 ◽  
Vol 535-537 ◽  
pp. 2365-2369 ◽  
Author(s):  
Ji Lei Wang ◽  
Ming Hui Li ◽  
Li Gang Wei ◽  
Ying Chong Ma ◽  
Kun Lan Li ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Aqueous Solutions ◽  
Adsorption Equilibrium ◽  
Copper Ions ◽  
Adsorption Time ◽  
Initial Concentration ◽  
Composite Beads ◽  
Adsorption Amount ◽  
Hcl Solution

Biodegradable cellulose/collagen beads were successfully prepared by coagulating a blend of cellulose and collagen using 1–butyl–3–methylimidazolium chloride ([C4mim]Cl). The copper ions (Cu(II)) adsorption from aqueous solutions using the prepared beads were investigated at 15 °C as a function of initial concentrations, adsorbents types and adsorption time. The results show that Cu(II) adsorption amount increases with increasing initial concentration. Cellulose/collagen beads can absorb more Cu(II) than cellulose beads and the adsorption equilibrium can be achieved at 30 min. The maxinum adsorption amount of the cellulose/collagen beads (1/1, wt/wt) is estimated to be 0.51 mmol/g. The 90% absorbed Cu(II) on the composite beads can be desorbed by treating with 1 mol/L HCl solution for 180 min.

Reduction and Biosorption of Cr from Aqueous Solution Using Banana Skin

2012 ◽  
Vol 518-523 ◽  
pp. 2708-2711 ◽  
Author(s):  
Ming Zhou ◽  
Hang Xu ◽  
Shu Fa Zhu ◽  
Ya Na Liu
Keyword(s):  
Aqueous Solution ◽  
Aqueous Solutions ◽  
Contact Time ◽  
Low Cost ◽  
Experimental Results ◽  
Initial Concentration ◽  
Effects Of Ph

The possible use of biowaste-banana skin as an alternative, low-cost biosorbent and reductant for removal of Cr from aqueous solutions was investigated. Effects of pH, contact time, Cr(VI) initial concentration and temperature on the reduction and biosorption of Cr by banana skin were studied. Experimental results showed that 1 g of dried banana skin could reduce about 230 mg of Cr(VI) to Cr(III), at the condition of 30°C, pH 2 and 300 rpm. The maximum Qeq of Cr(III) by banana skin was 6.3mg g-1 at the Cr(VI) initial concentration of 200mg L-1, 30°C , pH 2 and 300 rpm.

Comparative Study of Removal of Cadmium (II) and Chromium (III) Ions from Aqueous Solution Using Low-Cost Biosorbent

2014 ◽  
Vol 12 (1) ◽  
pp. 477-486 ◽  
Author(s):  
Abbas H. Sulaymon ◽  
Ahmed A. Mohammed ◽  
Tariq J. Al-Musawi
Keyword(s):  
Ph Value ◽  
Removal Rate ◽  
Low Cost ◽  
Order Kinetic ◽  
Cadmium Removal ◽  
Biosorption Capacity ◽  
Biosorption Process ◽  
Order Kinetic Model ◽  
Pseudo Second Order ◽  
Batch Biosorption

Abstract This study aims to evaluate the ability of abundant low-cost garden grass to remove cadmium and chromium ions from aqueous solutions. Batch biosorption studies were carried out to examine the biosorption capacity, pH value, temperature, agitation speed, and metal ions concentration. The biosorption process revealed that the garden grass was an effective biosorbent of cadmium and chromium. The maximum chromium and cadmium removal rate was 90 and 80% at pH 4, respectively. FTIR spectroscopy analysis showed that the hydroxyl, amine, and carboxyl groups were the major groups responsible for the biosorption process. The maximum biosorption capacity was 18.19 and 19.4 mg/g for cadmium and chromium, respectively. The biosorption isotherm data fitted well the Langmuir model. Kinetic data were adequately fitted by the pseudo-second-order kinetic model.

scholarly journals Removal of As(V) from aqueous solutions using calcium-alginate microspheres with encapsulated iron nanoparticles

2021 ◽  
Author(s):  
María Soledad Ruiz-Mora ◽  
Ruth Alfaro-Cuevas-Villanueva ◽  
Verónica Martínez-Miranda ◽  
Orlando Hernández-Cristóbal ◽  
Raúl Cortés-Martínez
Keyword(s):  
Particle Size ◽  
Aqueous Solutions ◽  
Calcium Alginate ◽  
Iron Nanoparticles ◽  
Low Cost ◽  
Human Consumption ◽  
Batch Systems ◽  
Adsorption Capacities ◽  
Kinetic Rates ◽  
Kinetic Equilibrium

Abstract This work investigated As(V) removal from aqueous solutions using calcium alginate microspheres with encapsulated iron nanoparticles (FeNPs) in batch systems. The kinetic, equilibrium, and thermodynamic parameters of the adsorption process were evaluated. Adsorbents were characterized using Fourier Transform Infrared Spectroscopy, Scanning Electron Microscopy, and Zeta Potential techniques. The FeNPs were obtained by a simple and low-cost method and they were successfully encapsulated and uniformly dispersed over the microspheres' surface. Significantly fast adsorption kinetic rates were observed due to microspheres' particle size and FeNPs encapsulation. The chemisorption mechanism was recognized in both adsorbate-adsorbent systems. The As(V) isotherms data suggested that the process is associated with heterogeneous adsorption. Available sorption sites with different adsorption energies were related to the functional groups involved in removing As(V), such as hydroxyl and carboxyl groups. Significantly high adsorption capacities were obtained for both materials, suggesting they can be competitive compared to conventional adsorbents, even at low FeNPs concentrations. Besides FeNPs encapsulation enhancing arsenate removal, higher adsorption was obtained at slightly acidic pH values and, together with their small particle size, suggests that the microspheres have a great potential to be used as arsenate adsorbents in the water treatment for human consumption.

scholarly journals Adsorption of Ni2+ and Cd2+ from Water by Calcium Alginate/Spent Coffee Grounds Composite Beads

2019 ◽  
Vol 9 (21) ◽  
pp. 4531 ◽  
Author(s):  
Roberto Torres-Caban ◽  
Carmen A. Vega-Olivencia ◽  
Nairmen Mina-Camilde
Keyword(s):  
Heavy Metals ◽  
Calcium Alginate ◽  
Metal Removal ◽  
Low Cost ◽  
Heavy Metal Removal ◽  
Point Of Zero Charge ◽  
Order Kinetic ◽  
Spent Coffee Grounds ◽  
Composite Beads ◽  
Coffee Grounds

The use of heavy metals in technological applications has led to detrimental effects on human health and the environment. Activated carbon and ion-exchange resins are commonly used to remove pollutants but they are expensive. Therefore, the research of low-cost alternatives derived from natural resources and organic wastes is being considered. The aim of this study considers the use of Calcium Alginate/Spent Coffee Grounds (CA–SCGs) composite beads to adsorb heavy metals from aqueous solutions, particularly, the removal of Ni2+ or Cd2+ at concentrations from 10 ppm to 100 ppm. CA–SCGs beads were made of equal proportions of alginate and spent coffee grounds and compared with calcium alginate beads (CA beads) and spent coffee grounds (SCGs) in terms of capacity and rate of adsorption. Three cycles of adsorption/desorption were done. The beads were characterized by Scanning Electron Microscopy coupled with an energy-dispersive X-ray spectroscopy (SEM–EDX), Fourier-transform infrared spectroscopy (FT–IR), Raman spectroscopy, and point of zero charge. Langmuir, Freundlich, and Sips models, and a pseudo-second-order kinetic equation were used. Sips model showed the best correlation with the adsorption of CA–SCGs beads with capacities of adsorption of 91.18 mg/g for cadmium and 20.96 mg/g for nickel. CA–SCGs beads had a greater adsorption than the CA beads, achieving adsorption percentages close to 100% than alginate alone, showing their effectiveness in heavy metal removal.

scholarly journals Analysis of removal of cadmium by action of immobilized Chlorella sp. micro-algae in alginate beads

F1000Research ◽  
2018 ◽  
Vol 7 ◽  
pp. 54 ◽  
Author(s):  
Christian Valdez ◽  
Yomaira Perengüez ◽  
Bence Mátyás ◽  
María Fernanda Guevara
Keyword(s):  
Aqueous Solution ◽  
Aqueous Solutions ◽  
Atomic Absorption ◽  
Calcium Alginate ◽  
Alginate Beads ◽  
Cadmium Removal ◽  
Initial Concentration ◽  
Calcium Alginate Beads ◽  
Chlorella Sp ◽  
Metabolic Systems

Cadmium (Cd) is a metal that can negatively interfere with the metabolic systems of living beings. The objective of this work was to evaluate the capacity for cadmium removal in aqueous solutions by immobilized Chlorella sp. in calcium alginate beads. Beads without Chlorella sp. were used as a control. All the treatments were established in triplicate for 80 min, at four concentrations of cadmium (0, 20, 100 and 200 ppm), taking samples of aqueous solution every 10 min, to be read using atomic absorption equipment. The study determined that the treatment of alginate beads with immobilized Chlorella sp. removed 59.67% of cadmium at an initial concentration of 20 ppm, this being the best removal result.

Biosorpsi Ion Zink (II) dari Larutan Berair menggunakan Kulit Pisang (Musa paradisiaca) sebagai Low-cost Biosorbent

2019 ◽  
Vol 2 (2) ◽  
Author(s):  
Edi Nasra ◽  
Desy Kurniawaty ◽  
Bahrizal ◽  
Reni Puspita Sari
Keyword(s):  
Particle Size ◽  
Optimum Condition ◽  
Aqueous Solutions ◽  
Flow Rate ◽  
Toxic Metals ◽  
Low Cost ◽  
Initial Concentration ◽  
Musa Paradisiaca ◽  
Column Method ◽  
Good Potential

Adsorpsi Zn (II) daril arutan berair menggunakan kulit pisang (Musa paradisiaca) sebagai biosorben telah dikaji dengan menggunakan metode kolom. Proses adsorpsi dikaji terhadap beberapa parameter,seperti pH, konsentrasil arutan Zn (II) mula-mula, massa biosorben, ukuran partikel biosorben dan laju alir. Kondisi optimum proses adsorpsi Zn (II) dengan biosorben kulit pisang berlangsung pada pH 3 dengan konsentrasi larutan Zn (II) mula-mula 500 mg/L, massa biosorben 0,6 g, ukuran partikel biosorben 250 µm dan laju alir 2 mL/min memiliki kapasita sadsorpsi 7,8567 mg/g. Berdasarkan hasil penelitian dapat disimpulkan bahwa kulit pisang, sebagai limbah, memiliki potensi yang baik sebagai biosorben untuk menyerap logam berat, seperti seng (Zn) dari perairan.   The removal of Zn (II) from aqueous solutions using banana (Musa paradisiaca) shell as biosorbent has been studied with column method. The parameters of adsorption such as pH, initial concentration, biosorbent dose, particle size and flow rate were investigated. The optimum condition was at pH=3, concentration 500 mg/l, biosorbent dose 0,6 g, 250 μm particle size and 2 ml/min flow rate with adsorption capacity 7,8567 mg/g. This study concluded that banana shell, a waste material, have good potential as biosorbent to remove toxic metals like zink from water.

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