Biosorption of Mercury(II) with Different Marine Algae

2009 ◽  
Vol 71-73 ◽  
pp. 585-588 ◽  
Author(s):  
Mariana Reategui ◽  
Holger Maldonado ◽  
M. Ly ◽  
Eric Guibal
Keyword(s):  
Marine Algae ◽  
Langmuir Equation ◽  
Order Equation ◽  
Lessonia Trabeculata ◽  
Salt Addition ◽  
Peruvian Coast ◽  
Grateloupia Doryphora ◽  
Macrocystis Integrifolia ◽  
Pseudo Second Order ◽  
Mercury Recovery

Five species of algae (Lessonia nigrescens Bory, Prionitis decipiens, Grateloupia doryphora, Lessonia trabeculata and Macrocystis integrifolia) collected from Peruvian coast have been tested for mercury recovery from synthetic solutions. Preliminary experiments showed that optimum sorption occurred at pH 6-7 and that Lessonia algae were the most efficient sorbents for Hg(II). The biomass was cross-linked with calcium chloride. Stabilized biosorbent showed sorption capacity as high as 267 mg g-1 at pH 6. The sorption isotherm was described by the Langmuir equation, while the pseudo-second order equation was used for modeling uptake kinetics. Salt addition strongly affected mercury sorption following the sequence: NaNO3 << Na2SO4 <<< NaCl.

Synthesis of Functionalized Magnetite Titanium Dioxide Nanocomposite for Removal of Acid Fuchsine Dye

2018 ◽  
Vol 21 (8) ◽  
pp. 583-593 ◽  
Author(s):  
Sara Rahnama ◽  
Shahab Shariati ◽  
Faten Divsar
Keyword(s):  
Titanium Dioxide ◽  
Removal Efficiency ◽  
Magnetic Core ◽  
Fractional Factorial ◽  
Order Kinetic ◽  
Sorption Data ◽  
Salt Addition ◽  
Order Kinetic Model ◽  
Pseudo Second Order ◽  
Ft Ir

Objective: In this research, a novel magnetite titanium dioxide nanocomposite functionalized by amine groups (Fe3O4@SiO2@TiO2-NH2) was synthesized and its ability for efficient removal of Acid Fuchsine as an anionic dye from aqueous solutions was investigated. Method: The core-shell structure of Fe3O4@SiO2@TiO2 was prepared using Fe3O4 as magnetic core, tetra ethyl orthosilicate as silica and tetra butyl titanate as titanium source for shell. The synthesized nanocomposites (particle size lower than 44 nm) were characterized by FT-IR, XRD, DRS, SEM and TGA instruments. The various experimental parameters affecting dye removal efficiency were investigated and optimized using Taguchi fractional factorial design. Results: The synthesized adsorbent showed the highest removal efficiency of Acid Fuchsine (99 %) at pH= 3.5, without salt addition and during stirring at contact times less than 10 minutes. The study of kinetic models at two concentration levels showed the fast dye sorption on the surface of proposed nanocomposites with pseudo second order kinetic model (R2=1). Also, the fitting of Acid Fuchsine sorption data to Freundlich, Langmuir and Temkin isotherms suggested that Freundlich model gave a better fitting than other models (R2=0.9936, n=2). Conclusion: Good chemical stability, excellent magnetic properties, very fast adsorption kinetics and high removal efficiency make the synthesized nanocomposite as a proper recoverable sorbent for removal of Acid Fuchsine dye from wastewaters.

scholarly journals Utilization of Lapindo Volcanic Mud for Enhanced Sono-sorption Removal of Acid Orange 52

2019 ◽  
Vol 14 (1) ◽  
pp. 189
Author(s):  
Nur Hidayatul Nazirah Kamarudin ◽  
Herma Dina Setiabudi ◽  
Aishah Abdul Jalil ◽  
Siti Hazirah Adam ◽  
Nur Fatien Muhamad Salleh
Keyword(s):  
Adsorption Process ◽  
Order Equation ◽  
Reaction Engineering ◽  
Adsorption Method ◽  
Adsorption Ability ◽  
Acid Orange ◽  
Isotherm Study ◽  
Sorption Method ◽  
Langmuir Isotherm Model ◽  
Pseudo Second Order

This study applied ultrasonic irradiation technique to remove acid orange 52 (AO52) and in the meantime utilizing the potential adsorbent, Lapindo volcanic mud (LVM). LVM was collected from the erupted mud in Sidoarjo, Indonesia and calcined prior the adsorption process. Previously in another study, Lapindo was proven to be efficient for adsorption of dyes in single adsorption method. In this study, the combination of adsorption with ultrasound, or as known as sono-sorption shows that the adsorptivity increased from 95.54 mg/g to 129.5 mg/g. The isotherm study shows that this process obeyed Langmuir isotherm model with adsorption capacity of 833.33 mg/g. The enhancement of sono-sorption method as compared to conventional method is believed to be resulted from the facilitated mass transfer driven by the ultrasound, along with the adsorption ability of LVM. The kinetic study fit to the pseudo second order equation. Copyright © 2019 BCREC Group. All rights reservedReceived: 1st October 2018; Revised: 22nd December 2018; Accepted: 7th January 2019; Available online: 25th January 2019; Published regularly: April 2019How to Cite: Kamarudin, N.H.N., Setiabudi, H.D., Jalil, A.A., Adam, S.H., Salleh, N.F.M. (2019). Utilization of Lapindo Volcanic Mud for Enhanced Sono-sorption Removal of Acid Orange 52. Bulletin of Chemical Reaction Engineering & Catalysis, 14 (1): 189-195 (doi:10.9767/bcrec.14.1.3326.189-195)Permalink/DOI: https://doi.org/10.9767/bcrec.14.1.3326.189-195  

Adsorption of Phosphorus by Lithium Silica Fume

2013 ◽  
Vol 368-370 ◽  
pp. 692-696
Author(s):  
Wei Lan Lin ◽  
Jin Chuan Gu ◽  
Yu Heng Wang ◽  
Wen Yuan Wang
Keyword(s):  
Silica Fume ◽  
Adsorption Kinetics ◽  
Removal Rate ◽  
Freundlich Isotherm ◽  
Good Method ◽  
Order Equation ◽  
Isotherm Equation ◽  
Dosage Effects ◽  
Adsorption Capacities ◽  
Pseudo Second Order

adsorption is a good method to remove phosphorus. In the experiment, lithium silica fume is used as the adsorption material, adsorption isotherms ,kinetics and dosage effects were examined. It shows that the adsorption kinetics data are consistent with the pseudo-second-order equation and the adsorption is easy to happen. Freundlich isotherm equation is fit for description of the adsorption. The maximum adsorption capacities on lithium silica fume is 1.166 mg/g. When dosage get to 12 g/l and the concentration of phosphorus solution is 2 mg/l, the removal rate reach to 95% at 308k.

scholarly journals Development of PANI/BN-based absorbents for water remediation

2019 ◽  
Vol 54 (4) ◽  
pp. 290-298
Author(s):  
Muhammad Arsalan ◽  
Azka Awais ◽  
Tingting Chen ◽  
Qinglin Sheng ◽  
Jianbin Zheng
Keyword(s):  
Adsorption Process ◽  
Binding Capacity ◽  
Order Equation ◽  
Langmuir Model ◽  
Water Remediation ◽  
Ionic Bond ◽  
Adsorption Performance ◽  
Optimum Ph ◽  
Pseudo Second Order ◽  
Bond Effect

Abstract In this research, novel PANI/BN-based absorbent was prepared by bonding polyaniline and bentonite for water remediation and their structures were characterized by scanning electron microscopy (SEM) and Fourier transform infrared spectroscopy (FTIR). The effect of pH, concentration of metal, and dosage amount on synthesized novel PANI/BN-based absorbent was investigated in detail. The result indicated that the PANI/BN-based absorbent has an excellent adsorption performance towards Cu, Pb, and Ni, and the highest binding capacity of 130 mg g−1 for Ni was obtained under normal conditions. The adsorption of PANI/BN absorbent was found to depend on pH when pH &lt; 7.0, but the adsorption has been found independent from the ionic bond effect. The adsorption at optimum pH for Cu (pH 6) and Pb (pH 5) was observed as 85 mg g−1 and 105 mg g−1, respectively. The best results collected at those conditions of isotherm data and adsorption kinetics are represented by the Langmuir model and pseudo-second order equation, respectively. Thermodynamic results (ΔH &gt; 0, ΔS &gt; 0, ΔG &lt; 0) showed that the adsorption process of Cu, Ni, and Pb is significantly increased by the synthesized novel PANI/BN-based absorbent.

Kinetics of Glyphosate Adsorption on Composite Resin from Aqueous Solution

2013 ◽  
Vol 803 ◽  
pp. 157-160
Author(s):  
Zhen Zhen Kong ◽  
Dong Mei Jia ◽  
Su Wen Cui
Keyword(s):  
Experimental Data ◽  
Aqueous Solution ◽  
Composite Resin ◽  
Order Equation ◽  
Second Order ◽  
First Order ◽  
Basic Resin ◽  
Pseudo Second Order ◽  
Kinetics Of ◽  
Best Fit

The composite weakly basic resin (D301Fe) was prepared and examined using scanning electron microscopy and Fourier transform infrared spectroscopy. The adsorption kinetics of glyphosate from aqueous solution onto composite weakly basic resin (D301Fe) were investigated under different conditions. The experimental data was analyzed using various adsorption kinetic models like pseudo-first order, the pseudo-second order, the Elovich and the parabolic diffusion models to determine the best-fit equation for the adsorption of glyphosate onto D301Fe. The results show that the pseudo-second order equation fitted the experimental data well and its adsorption was chemisorption-controlled.

scholarly journals Utilization of agricultural and industrial wastes for metal removal from aqueous solutions

2011 ◽  
Vol 13 (1) ◽  
pp. 20-22 ◽  
Author(s):  
Marta Biegańska ◽  
Ryszard Cierpiszewski
Keyword(s):  
Aqueous Solutions ◽  
Adsorption Kinetics ◽  
Metal Removal ◽  
Order Equation ◽  
Industrial Wastes ◽  
Cadmium Removal ◽  
Cadmium Ions ◽  
Ph Values ◽  
Freundlich Equation ◽  
Pseudo Second Order

Utilization of agricultural and industrial wastes for metal removal from aqueous solutions In this study a possibility of obtaining sorbents from basketry wastes has been investigated. Therefore, adsorption of cadmium ions on wicker bark of Salix americana has been studied. The obtained experimental results were described by the Freundlich equation and adsorption kinetics by the pseudo-second order equation. The effect of pH on cadmium ions adsorption by S. americana was also investigated. It has been found that for the pH values ranging from 2 to 7 cadmium removal from the solution was held at almost constant level.

A Comparative Study on the Removal of 2,2',4,4'-Tetrabrominated Diphenyl Ether (BDE-47) by Four Different Methods

2014 ◽  
Vol 700 ◽  
pp. 211-215
Author(s):  
Yi Miao Lin ◽  
Ling Yun Li ◽  
Ji Wei Hu ◽  
Ming Yi Fan ◽  
Chao Zhou ◽  
...  
Keyword(s):  
Exchange Resin ◽  
Diphenyl Ether ◽  
Ion Exchange Resin ◽  
Order Equation ◽  
Second Order ◽  
Order Kinetic ◽  
First Order ◽  
Atomic Force ◽  
Phase Reduction ◽  
Pseudo Second Order

The zero-valent iron (ZVI) particles were synthesized by the aqueous phase reduction, and the tapping mode image of atomic force microscope (AFM) showed that the diameter of the ZVI particles was in the range of 90 nm - 400 nm. By comparison of the debromination of BDE-47 by sunlight, ZVI, ZVI impregnated activated carbon (ZVI/AC) and ZVI impregnated ion exchange resin (ZVI/IER), the debromination effect was found to descend in the following order: ZVI/IER > ZVI/AC > ZVI > sunlight. Second order and first order kinetic models were used for the fitting of the debromination data of BDE-47. Results show that the debromination data of BDE-47 by the sunlight, ZVI, ZVI/AC and ZVI/IER in the current study are generally best described by the pseudo first order equation. Meanwhile, the debromination data of BDE-47 by the ZVI and ZVI/IER can also be described by the pseudo second order equation.

Adsorption of Th4+ on Waste Beer Yeast

2013 ◽  
Vol 726-731 ◽  
pp. 2111-2114
Author(s):  
Jing Wang ◽  
Yan Chen ◽  
Bo Yang ◽  
Juan Feng ◽  
Xiao Yan Lin
Keyword(s):  
Removal Efficiency ◽  
Adsorption Kinetics ◽  
Ph Value ◽  
Order Equation ◽  
Absorption Time ◽  
Radioactive Wastewater ◽  
Before And After ◽  
Pseudo Second Order ◽  
Optimized Conditions ◽  
Beer Yeast

Waste beer yeast was utilized as adsorbent to remove Th4+ from simulated radioactive wastewater. Effects of various parameters including pH value, temperature, absorbent dosage, and absorption time on adsorption of Th4+ by waste beer yeast were studied. Beer yeast before and after adsorption was characterized by IR and SEM. The results show that the removal efficiency could be reached 95% at the optimized conditions. The adsorption kinetics was described well by the pseudo second-order equation.

Ecofriendly dyeing of silk with extract of yerba mate (Ilex paraguariensis)

2016 ◽  
Vol 87 (7) ◽  
pp. 829-837 ◽  
Author(s):  
Fernando Giacomini ◽  
Maira Amanda Benedet Menegazzo ◽  
José Celso Oliveira dos Santos ◽  
Pedro Augusto Arroyo ◽  
Maria Angélica Simões Dornellas de Barros
Keyword(s):  
Significant Contribution ◽  
Dye Adsorption ◽  
Order Equation ◽  
Ilex Paraguariensis ◽  
Yerba Mate ◽  
Potassium Alum ◽  
Freundlich Model ◽  
Equilibrium Data ◽  
Pseudo Second Order ◽  
Rate Controlling Step

Silk fabric was dyed with extract of roasted yerba mate ( Ilex paraguariensis). Dyeing experiments were carried out at varying dyestuff concentration, temperature and pH. The influence of mordants, such as potassium alum and tannin, was investigated. The best results in dyeing were produced with 20 g L–1 of dyestuff concentration, pH 3 and temperature of 90℃. Mordants showed negligible influence. The kinetic study showed that the pseudo-second-order equation better represented experimental data, which is related to the chemisorption process as the rate-controlling step. The equilibrium data were easily adjusted by the Langmuir–Freundlich model, indicating the significant contribution of the chemisorption process in a monolayer followed by a multilayer physisorption. The thermodynamic study indicated that dye adsorption was spontaneous and endothermic.

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