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.

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.

Adsorption Behavior and Kinetics of Methyl Orange in Water on Activated Carbon

2012 ◽  
Vol 549 ◽  
pp. 318-321 ◽  
Author(s):  
Yong Hong Wu ◽  
Qi Yu ◽  
Hong Da Xu ◽  
Zhi Yong Liu ◽  
Ming Zhu Sun ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Methyl Orange ◽  
Adsorption Equilibrium ◽  
Adsorption Behavior ◽  
Adsorption Efficiency ◽  
Key Factors ◽  
Adsorption Time ◽  
Initial Concentration ◽  
Freundlich Equation ◽  
Kinetics Of

The adsorption behavior of methyl orange aqueous solution was investigated on husk-based activated carbon. The effects of key factors, i.e., degassing pretreatment, adsorption time, temperature, adsorbent dosage and initial concentration, on the adsorption efficiency were measured. The kinetic adsorption curves and adsorption isotherms were fitted with theoretical model. The results show that the removal efficiency of methyl orange could be significantly improved by degassing pretreatment, prolonging the time, lowering temperature or reducing the initial concentration. In the context, adsorption equilibrium will be achieved up 90min. Furthermore, adsorption rate will be enhanced by the increase of the amount of activated carbon. In conclusion, adsorption isotherm and adsorption kinetics can be fitted well with Freundlich equation and pseudo-first Lagergren model, respectively.

Study on Characteristics of Ammonium Nitrogen Adsorption by Biochar Prepared in Different Temperature

2013 ◽  
Vol 724-725 ◽  
pp. 452-456 ◽  
Author(s):  
Ning Liu ◽  
Chong Jun Zhou ◽  
Shi Feng Fu ◽  
Muhammad Imran Ashraf ◽  
En Feng Zhao ◽  
...  
Keyword(s):  
Reaction Time ◽  
Adsorption Equilibrium ◽  
Nitrogen Concentration ◽  
Nitrogen Adsorption ◽  
Ammonium Nitrogen ◽  
Carbonization Temperature ◽  
Initial Concentration ◽  
Investigation Result ◽  
Adsorption Amount ◽  
Temperature Preparation

A model was prepared for the preparation of biochar from the biomass of mushroom residue at different carbonization temperature (350 °C,450 °Cand 550 °C) for adsorption characteristics of ammonium nitrogen in water through different ammonium nitrogen concentration, reaction time, pH and temperature. The investigation result showed that the adsorptive amount of these three biochar substances increased quickly with the initial concentration (0-2 h) and the adsorption equilibrium was reached after 4 hours. The adsorptive amount of these three biochars increased with the rise of pH from 5 to 9. Different temperature preparation of biochar on ammonium nitrogen adsorption increases with the rise of temperature. Different temperature preparation of biochar on ammonium nitrogen adsorption amount is in the order of 550 °Cbiochar > 450 °Cbiochar > 350 °Cbiochar.

scholarly journals Graphene/CNT hybrid effect on Absorption of Mn2+ by Activated Carbon

2019 ◽  
Vol 2 (2) ◽  
pp. 31-36 ◽  
Author(s):  
Ahmad Ghozatloo ◽  
Mojtaba Shariaty-Niassar
Keyword(s):  
Heavy Metal ◽  
Activated Carbon ◽  
Aqueous Solutions ◽  
Heavy Metal Ions ◽  
Ion Adsorption ◽  
Manganese Ions ◽  
Experimental Conditions ◽  
Hybrid Effect ◽  
Initial Concentration ◽  
Adsorption Amount

In this paper we tried to improve the adsorption amount by adding graphene/CNT hybrid in the structure of Activated Carbon (AC) for removing manganese ions from aqueous solutions. The bonding of G/CNT hybrid with activated carbon creates a structure that is an excellent absorbent for removing some heavy metal ions. So the Performance increasing of ion adsorption was compared with AC results as the blank adsorbent. The influence of time, pH solution, initial concentration of Mn2+ and temperature investigated as experimental conditions. The maximum adsorption was 89.38% and 96.18% for  AC and AC/G/CNT composite respectively at 30 min, initial concentration of 30 mg/L, pH=4.5 in 15°C for both adsorbents. The results showed that under the same conditions, the presence of G/CNT hybrid in the structure of AC increased the amount of adsorption by 7.5%  

Removal of Cr(VI) from Water Using Attapulgite/Chitosan Composites

2013 ◽  
Vol 781-784 ◽  
pp. 2233-2236
Author(s):  
Yong Chen ◽  
Shi Yu Wang ◽  
Hui Xu
Keyword(s):  
Aqueous Solution ◽  
Langmuir Isotherm ◽  
Copper Ions ◽  
External Factors ◽  
Adsorption Efficiency ◽  
Mass Ratio ◽  
Absorption Time ◽  
Adsorption Time ◽  
Initial Concentration ◽  
Langmuir Isotherm Model

In this work attapulgite and chitosan were employed to prepare composites as eco-friendly adsorbent. Study on the adsorption efficiency of the adsorbent for Cr (VI) in aqueous solution was carried out. External factors such as the amount of attapulgite in the composites, initial concentration of Cr (VI), adsorption time and adsorbent dosage how to influence the adsorption efficiency of composites were investigated. The results showed that 0.63g adsorbent can reach maximum adsorption rate, which the mass ratio of attapulgite and chitosan is 0.8:1, the initial concentration of copper ions is 100mg / L and absorption time is 30min. Isotherm data fitted well to the Langmuir isotherm model.

Study on the Removal of Copper Ions from Water Using Eco-Friendly Attapulgite/Chitosan Composites

2012 ◽  
Vol 499 ◽  
pp. 419-422
Author(s):  
Yong Chen ◽  
Hui Xu ◽  
Jin Bao Sun ◽  
Chang Long Zhang
Keyword(s):  
Aqueous Solution ◽  
Removal Efficiency ◽  
Room Temperature ◽  
Copper Ions ◽  
External Factors ◽  
Mass Ratio ◽  
Absorption Time ◽  
Adsorption Time ◽  
Initial Concentration ◽  
Adsorbent Dosage

In this work attapulgite and chitosan were employed to prepare composites as eco-friendly adsorbent. Study on the removal efficiency of the adsorbent for copper ions in aqueous solution was carried out. External factors such as the amount of attapulgite in the composites, temperature, initial concentration of copper ions, adsorption time and adsorbent dosage how to influence the removal efficiency of composites were investigated. The results showed that at room temperature, 0.37g adsorbent can reach maximum adsorption rate, which the mass ratio of attapulgite and chitosan is 1:1, the initial concentration of copper ions is 50mg / L and absorption time is 2h.

scholarly journals An Investigation on Design and Characterization of a Highly Selective LED Optical Sensor for Copper Ions in Aqueous Solutions

Sensors ◽  
2021 ◽  
Vol 21 (4) ◽  
pp. 1099
Author(s):  
Sheng-Chun Hung ◽  
Chih-Cheng Lu ◽  
Yu-Ting Wu
Keyword(s):  
Aqueous Solutions ◽  
Metal Ions ◽  
Copper Ions ◽  
Incident Light ◽  
Copper Ion ◽  
Intensity Change ◽  
Optical Absorbance ◽  
Sensing System ◽  
Optic Sensor ◽  
Cu Ions

The optical characteristics of copper ion detection, such as the photometric absorbance of specific wavelengths, exhibit significant intensity change upon incident light into the aqueous solutions with different concentrations of metal ions due to the electron transition in the orbit. In this study, we developed a low-cost, small-size and fast-response photoelectric sensing prototype as an optic sensor for copper (Cu) ions detection by utilizing the principle of optical absorption. We quantified the change of optical absorbance from infra-red (IR) light emitting diodes (LEDs) upon different concentrations of copper ions and the transmitted optical signals were transferred to the corresponding output voltage through a phototransistor and circuit integrated in the photoelectric sensing system. The optic sensor for copper (Cu) ions demonstrated not only excellent specificity with other metal ions such as cadmium (Cd), nickel (Ni), iron (Fe) and chloride (Cl) ions in the same aqueous solution but also satisfactory linearity and reproducibility. The sensitivity of the preliminary sensing system for copper ions was 29 mV/ppm from 0 to 1000 ppm. In addition, significant ion-selective characteristics and anti-interference capability were also observed in the experiments by the proposed approach.

Facile Fabrication of Novel Magnetic ZIF-67 MOF@Aminated Chitosan Composite Beads for the Adsorptive Removal of Cr(VI) from Aqueous Solutions

2021 ◽  
pp. 118084
Author(s):  
Ahmed M. Omer ◽  
Eman M. Abd El-Monaem ◽  
Mona M. Abd El-Latif ◽  
Gehan M. El-Subruiti ◽  
Abdelazeem S. Eltaweil
Keyword(s):  
Aqueous Solutions ◽  
Adsorptive Removal ◽  
Composite Beads ◽  
Facile Fabrication ◽  
Chitosan Composite
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