Biosorption of Zn(II) from Aqueous Solution by Amusium pleuronectes Shell

2016 ◽  
Vol 675-676 ◽  
pp. 7-10
Author(s):  
K. Chantarasunthon ◽  
Kanyakorn Teanchai ◽  
Wichian Siriprom
Keyword(s):  
Aqueous Solution ◽  
Experimental Investigation ◽  
Contact Time ◽  
Physical Adsorption ◽  
Absorption Capacity ◽  
X Ray Diffraction ◽  
Batch Method ◽  
Solution Ph ◽  
X Ray ◽  
High Level

In this study, the experimental investigation and assessment the absorption capacity for Zn ion with Amusium Pleuronectes shell. The investigations were carried out by batch method and variables of the batch experiment include solution pH, Contact time, were determind. The mechanism of bisorption is chemisorption or/and physical adsorption was confirmed by X-ray Diffraction (XRD) and Energy Dispersive X-ray Fluorescence (EDXRF). The results showed that the Amusium Pleuronectes shell has a high level of absorption capacity for Zn (II) ions. Another that result of mechanism of biosorption suggests and confirm with the result of XRD and EDXRF.

The Study of the Removal of Cu(II) from Aqueous Solution by Papia undulates Shell

2016 ◽  
Vol 675-676 ◽  
pp. 664-666
Author(s):  
Noppadon Chamchoi ◽  
Narong Sangwaranatee ◽  
Jakrapong Kaewkhao ◽  
K. Teanchai ◽  
Wichian Siriprom
Keyword(s):  
Aqueous Solution ◽  
Contact Time ◽  
Experimental Result ◽  
X Ray Diffraction ◽  
Solution Ph ◽  
Factors Affecting ◽  
X Ray ◽  
Mixture Phase ◽  
Ft Ir ◽  
Ft Ir Spectroscopy

In present study, the removal of Cu (II) ions from aqueous solution was investigated by both biosorption and investigated by X-ray Diffraction (XRD), Energy Dispersive X-ray Fluorescence (EDXRF) and Fourier transform infrared (FT-IR) spectroscopy. The variable of the batch experiment include solution pH, content time, were conducted to determine the factors affecting capacities sorption of Cu (II). The experimental result explored that that the maximum pH for efficient sorption of Cu (II) was 9. The optimum condition of sorption were found to be contact time of 180 min, and initial Cu concentration 200 mg/L, while the result of XRD reveal that the Paphia undulate shell have aragonite phase and change to mixture phase after sorption which corresponding, with the result of EDXRF which increasing the concentration of Cu

Study of the Sorption of Cu(II) from Aqueous Solution Using Amusium pleuronectes Shell

2016 ◽  
Vol 675-676 ◽  
pp. 631-634
Author(s):  
Preeyawal Kuha ◽  
Kanyakorn Teanchai ◽  
Wichian Siriprom
Keyword(s):  
Aqueous Solution ◽  
Contact Time ◽  
Physical Adsorption ◽  
Batch Experiments ◽  
Optimum Conditions ◽  
Solution Ph ◽  
Xrd Pattern ◽  
Initial Concentration ◽  
X Ray ◽  
Batch Biosorption

In the present study batch biosorption studies were carried out for the adsorption of Cu (II) from aqueous solution with Amusium Pleuronectes shell. Variables of the batch experiments include initial concentration of Cu (II), solution pH, contact time, were investigated. The experimental results explored that the maximum pH for efficient sorption of Cu (II) was 9. The optimum conditions of sorption were found to be contact time of 200 min, initial Cu concentration 250 mg/L. Another that, the X-Ray Driffraction (XRD) was used to confirmed the binding site between the bio sorbent and the Cu (II) ions. From XRD pattern the result suggests that the mechanism of bio sorption is rather chemisorption than physical adsorption.

scholarly journals Obtaining adsorbents from acid and acid-thermal activation of bentonite for chlorothalonil pesticide removal

2020 ◽  
Vol 15 (3) ◽  
pp. 812-825
Author(s):  
Nadia Boudouara ◽  
Réda Marouf ◽  
Jacques Schott
Keyword(s):  
Aqueous Solution ◽  
Contact Time ◽  
Thermal Activation ◽  
X Ray Diffraction ◽  
Acid Attack ◽  
Experimental Conditions ◽  
X Ray ◽  
Pesticide Removal ◽  
Freundlich Equation ◽  
Pseudo Second Order

Abstract Bentonite samples collected from M'Zila of Mostaganem (Algeria) were treated in first protocol with sulfuric acid at concentrations 1, 3 and 6N. The second protocol concerns the acid attack of bentonite combined with thermal treatment at temperatures of 100 and 200 °C. The obtained adsorbents were characterized by different analyses techniques such as chemical composition, X-ray diffraction (XRD), specific surface area and pHPZC. The modified bentonites were used for removal of Chlorothalonil (Chl) from aqueous solution. The adsorption behavior of the pesticide was studied under different experimental conditions of pH, contact time, concentration of Chl and temperature of solution. The adsorption of Chl followed pseudo-second order kinetics and was described by the Freundlich equation. Thermodynamic study revealed that Chl adsorption was endothermic and physical in nature.

scholarly journals Adsorption of Arsenate from Aqueous Solution onto Modified Vietnamese Bentonite

2019 ◽  
Vol 2019 ◽  
pp. 1-13 ◽  
Author(s):  
Nguyen Le My Linh ◽  
Duc Hoang Van ◽  
Tran Duong ◽  
Mai Xuan Tinh ◽  
Dinh Quang Khieu
Keyword(s):  
Aqueous Solution ◽  
Nitrogen Adsorption ◽  
X Ray Diffraction ◽  
Solution Ph ◽  
X Ray ◽  
Surface Areas ◽  
Layered Clays ◽  
Monolayer Adsorption ◽  
Langmuir Isotherm Model ◽  
Adsorption Desorption

In this study, pillared layered clays were prepared by modifying Vietnamese bentonite with polymeric Al and Fe. The obtained materials were characteristic of X-ray diffraction analysis, thermal analysis, and nitrogen adsorption/desorption isotherms. The results indicated that hydroxy-aluminum ([Al13O4(OH)24(H2O)12]7+) and poly-hydroxyl-Fe or polyoxo-Fe cations were intercalated into layers of clay, resulting in an increase of d001 values and of the specific surface areas compared with those of initial bentonite. Modified bentonites were employed to adsorb As(V) from aqueous solution. The adsorption of As(V) was strongly dependent on solution pH, and the maximum adsorption of modified bentonites was obtained in the pH 3.0 for Fe-bentonite and the pH 4.0 for Al-bentonite. The equilibrium adsorption study showed that the data were well fit by the Langmuir isotherm model. The maximum monolayer adsorption capacity of As(V) at 30°C derived from the Langmuir equation was 35.71 mg/g for Al-bentonite and 18.98 mg/g for Fe-bentonite. Adsorption kinetics, thermodynamics, and reusability of modified bentonites have been addressed.

scholarly journals Synthesis and Characterization of CuFe2O4 Nanoparticles Modified with Polythiophene: Applications to Mercuric Ions Removal

Nanomaterials ◽  
2020 ◽  
Vol 10 (3) ◽  
pp. 586 ◽  
Author(s):  
Ayman H. Kamel ◽  
Amr A. Hassan ◽  
Abd El-Galil E. Amr ◽  
Hadeel H. El-Shalakany ◽  
Mohamed A. Al-Omar
Keyword(s):  
Electron Microscopy ◽  
Aqueous Solution ◽  
Maximum Adsorption Capacity ◽  
X Ray Diffraction ◽  
Solution Ph ◽  
X Ray ◽  
Transmission Electron ◽  
Enhanced Adsorption ◽  
Co Precipitation ◽  
Adsorption Desorption

In this research, CuFe2O4 nanoparticles were synthesized by co-precipitation methods and modified by coating with thiophene for removal of Hg(II) ions from aqueous solution. CuFe2O4 nanoparticles, with and without thiophene, were characterized by x-ray diffraction (XRD), Field emission scanning electron microscopy (FESEM), energy dispersive x-ray (EDX), high-resolution transmission electron microscopy (HRTEM) and Brunauer–Emmett–Teller (BET). Contact time, adsorbent dose, solution pH, adsorption kinetics, adsorption isotherm and recyclability were studied. The maximum adsorption capacity towards Hg2+ ions was 7.53 and 208.77 mg/g for CuFe2O4 and CuFe2O4@Polythiophene composite, respectively. Modification of CuFe2O4 nanoparticles with thiophene revealed an enhanced adsorption towards Hg2+ removal more than CuFe2O4 nanoparticles. The promising adsorption performance of Hg2+ ions by CuFe2O4@Polythiophene composite generates from soft acid–soft base strong interaction between sulfur group of thiophene and Hg(II) ions. Furthermore, CuFe2O4@Polythiophene composite has both high stability and reusability due to its removal efficiency, has no significant decrease after five adsorption–desorption cycles and can be easily removed from aqueous solution by external magnetic field after adsorption experiments took place. Therefore, CuFe2O4@Polythiophene composite is applicable for removal Hg(II) ions from aqueous solution and may be suitable for removal other heavy metals.

scholarly journals Controllable Synthesis of Zn2GeO4Nanorods for Photocatalytic Reduction of Aqueous Cr(VI) and Oxidation of Organic Pollutants

2015 ◽  
Vol 2015 ◽  
pp. 1-8 ◽  
Author(s):  
Jin Liu ◽  
Xiaodan Jin ◽  
Yurong Shi ◽  
Mingming Qiao
Keyword(s):  
Electron Microscopy ◽  
Aqueous Solution ◽  
Optical Properties ◽  
Organic Pollutants ◽  
Diffuse Reflectance ◽  
X Ray Diffraction ◽  
Controllable Synthesis ◽  
Solution Ph ◽  
Photocatalytic Ability ◽  
X Ray

Zn2GeO4nanorods were successfully synthesized by a simple hydrothermal method. The composition, morphology, and optical properties of as-synthesized Zn2GeO4samples were characterized by X-ray diffraction, scan electron microscopy, and UV-vis diffuse reflectance spectra. The photocatalytic properties of Zn2GeO4nanorods were evaluated by the reduction of Cr(VI) and oxidation of organic pollutants in aqueous solution. The effects of solution pH on Cr(VI) reduction by Zn2GeO4nanorods were studied in detail. The results indicated that the efficiency of Cr(VI) reduction was highest at pH 5.96. Moreover, Zn2GeO4nanorods also showed excellent photocatalytic ability for the oxidation of organic pollutants such as rhodamine B and 4-nitrophenol.

Preparation and characterization of CTAB-HACC bentonite and its ability to adsorb phenol from aqueous solution

2011 ◽  
Vol 64 (1) ◽  
pp. 286-292 ◽  
Author(s):  
Ruihua Huang ◽  
Dongsheng Zheng ◽  
Bingchao Yang ◽  
Bo Wang ◽  
Zengqiang Zhang
Keyword(s):  
Aqueous Solution ◽  
Contact Time ◽  
Trimethyl Ammonium Chloride ◽  
Adsorption Efficiency ◽  
X Ray Diffraction ◽  
Phenol Solution ◽  
X Ray ◽  
Initial Ph ◽  
Lower Temperature

A novel type of adsorbent was prepared by modifying bentonite with N-2-hydroxypropyl trimethyl ammonium chloride chitosan (HACC) with cetyl trimethylammonium bromide (CTAB). The adsorbent was named CTAB-HACC bentonite. Its characteristics were investigated using thermogravimetric, Fourier-transform infrared spectroscopy (FTIR) and X-ray diffraction. The adsorption of phenol onto CTAB-HACC bentonite was evaluated by changing various parameters, such as contact time, adsorbent dosage, initial pH of the solution, and temperature. The maximum adsorption was observed at pH 12. Adsorption of phenol on CTAB-HACC bentonite favored at lower temperature and established the equilibrium in 30 min. The adsorption efficiency reached 82.1%, and the adsorption capacity was 7.12 mg/g from the phenol solution with a concentration of 500 mg/L at pH 12.0 and 20 °C.

Preparation and characterization of a new sawdust/MNP/PEI nanocomposite and its applications for removing Pb (II) ions from aqueous solution

2018 ◽  
Vol 78 (12) ◽  
pp. 2469-2480
Author(s):  
Avat Ghasemi ◽  
Mahmoud Reza Sohrabi ◽  
Fereshteh Motiee
Keyword(s):  
Aqueous Solution ◽  
Contact Time ◽  
Adsorption Process ◽  
Aqueous Media ◽  
X Ray Diffraction ◽  
Phase Contact Time ◽  
X Ray ◽  
Langmuir Adsorption ◽  
Ft Ir

Abstract A new sawdust/magnetite nanoparticles/polyethyleneimine (SD/MNP/PEI) nanocomposite was synthesized by grafting polyethyleneimine (PEI) to magnetic sawdust. Features of SD/MNP/PEI were characterized using Fourier transform infrared spectroscopy (FT-IR) and X-ray diffraction (XRD), vibrating sample magnetometer (VSM) and scanning electron microscopy (SEM). SD/MNP/PEI was used as an adsorbent for the removal of lead (Pb (II)) from aqueous solution. The effects of independent variables including pH of solution, adsorbent dose and contact time were performed and adsorption isotherms were obtained. Experimental results show that priority effective variables were pH and the amount of nanocomposite, and it was found that the sorption capacity increases with the increasing phase contact time. The adsorption process followed the Langmuir adsorption isotherm. Although SD and SD/MNP do not show a high affinity for the adsorption of Pb (II) in aqueous media, polyethyleneimine cross-linked on SD/MNP showed 40 and 66% increases, respectively, in the adsorption of Pb (II) compared to the SD and SD/MNP. It was found that SD/MNP/PEI removes more efficiently lead ions from aqueous solutions than the SD, SD/MNP. Desorption of the lead from the SD/MNP/PEI was conducted. It was proved that SD/MNP/PEI has excellent properties and can be used as a sorbent of multi-use.

scholarly journals Adsorption Mechanism of Ciprofloxacin from Water by Synthesized Birnessite

2015 ◽  
Vol 2015 ◽  
pp. 1-7 ◽  
Author(s):  
Xuebing Xing ◽  
Jingwen Feng ◽  
Guocheng Lv ◽  
Kenan Song ◽  
Lefu Mei ◽  
...  
Keyword(s):  
Fourier Transform ◽  
Quantum Mechanics ◽  
Contact Time ◽  
Adsorption Mechanism ◽  
Surface Adsorption ◽  
Oxidation States ◽  
Alkaline Condition ◽  
X Ray Diffraction ◽  
Solution Ph ◽  
X Ray

The efficiency of ciprofloxacin (CIP) adsorption on synthesized birnessite was systematically studied under varying physicochemical conditions, such as solution pH, contact time, initial CIP concentration, and different average oxidation states (AOS) of Mn in birnessite. X-ray diffraction (XRD), Fourier transform infrared (FTIR), and molecular simulations were employed to investigate the adsorption mechanism of CIP on birnessite. Experimental results showed that surface adsorption instead of cation exchange was responsible for the uptake of CIP on birnessite. The quantum mechanics simulation showed that the final energy of the interaction between CIP and birnessite was smaller under the condition when the AOS of Mn was lower, in comparison to the case when the AOS of Mn was high. The highest CIP adsorption occurred under a weak alkaline condition.

scholarly journals Sorption of Pb(II) from Aqueous Solutions by Acid-Modified Clinoptilolite-Rich Tuffs with Different Si/Al Ratios

2019 ◽  
Vol 9 (12) ◽  
pp. 2415 ◽  
Author(s):  
Mohamed Abatal ◽  
Atl V. Córdova Quiroz ◽  
María T. Olguín ◽  
América R. Vázquez-Olmos ◽  
Joel Vargas ◽  
...  
Keyword(s):  
Aqueous Solutions ◽  
Contact Time ◽  
Point Of Zero Charge ◽  
X Ray Diffraction ◽  
Solution Ph ◽  
Batch Studies ◽  
X Ray ◽  
Pseudo Second Order ◽  
Modified Clinoptilolite ◽  
Adsorbent Dose

The removal of Pb(II) from aqueous solutions by acid-modified clinoptilolite-rich tuff was investigated in this work. Clinoptilolite-rich tuff samples were treated using H2SO4 at different concentrations. Prior to and following acid treatment, the samples were characterized using X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDS), and Fourier-transform infrared spectroscopy (FTIR). The pH of the point of zero charge (pHPZC) was also determined as part of this characterization. Batch studies were studied to investigate Pb(II) removal as a function of contact time, initial Pb(II) concentration, adsorbent dosage, and solution pH. The results of the XRD and SEM techniques showed that clinoptilolite is the main mineral of the non- and acid-treated natural zeolite samples. However, EDS analysis indicated that the Si/Al ratio increases as the exchangeable ions decrease with increasing acid concentrations. The optimum conditions for Pb(II) removal for samples with 4.37 ≤ Si/Al ≤ 7.9 were found to be as follows: Contact time of 60–360 min, pH: 6–8, and adsorbent dose of 6 mg g−1; whereas for acid-modified clinoptilolite-rich tuffs with 9.01 ≤ Si/Al ≤ 9.52, these conditions were as follows: Contact time of 1440 min, pH: 8–10, and adsorbent dose of 10 mg g−1. The experimental data were analyzed by kinetic and isotherms models. The results showed that the sorption of Pb(II) on samples with Si/Al ratios of 4.37, 5.31, and 7.91 were in agreement with the pseudo-second order and Langmuir isotherm with qm = 48.54, 37.04, and 14.99 mg g−1, respectively, while the kinetic data and isotherm for samples with 9.01 ≤ Si/Al ≤ 9.52 were found to fit the pseudo-first order and Freundlich model.

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