Synthesis of Spherical Assembly Composed of MnO2 Nanoparticles Using Spent Zn-Mn Batteries

2012 ◽  
Vol 178-181 ◽  
pp. 1012-1015 ◽  
Author(s):  
Ming Yang ◽  
Guan Liu Zhang ◽  
Peng Fei Li ◽  
Xiao Ying Li ◽  
Cheng Chen
Keyword(s):  
High Efficiency ◽  
Average Diameter ◽  
Langmuir Model ◽  
Maximum Adsorption Capacity ◽  
Methyl Red ◽  
X Ray ◽  
Adsorption Performance ◽  
Mno2 Nanoparticles ◽  
Adsorption Data ◽  
Isotherm Adsorption

Spherical assembly composed of MnO2 nanoparticles with an average diameter of 0.8-2.0 μm have been prepared using spent Zn-Mn batteries. The product was characterized by X-ray powder diffraction and scanning electron microscope. The adsorption performance of spherical assembly composed of MnO2 for methyl red was investigated. The adsorbent showed high efficiency for the removal of methyl red in water. The equilibrium of adsorption was achieved within 30 min. The isotherm adsorption data obeyed the Langmuir model, with a maximum adsorption capacity of 92.6 mg g-1.

Synthesis of Spherical Assembly Composed of Mn3O4 Nanoparticles and its Adsorption Behavior for Alizarin Red in Water

2011 ◽  
Vol 694 ◽  
pp. 165-169 ◽  
Author(s):  
Ming Yang ◽  
Qian Sun ◽  
Chen Fei Zhao ◽  
Xin Xin Sheng
Keyword(s):  
High Efficiency ◽  
Average Diameter ◽  
Langmuir Model ◽  
Maximum Adsorption Capacity ◽  
Alizarin Red ◽  
X Ray ◽  
Adsorption Performance ◽  
Adsorption Data ◽  
Isotherm Adsorption ◽  
Mn3o4 Nanoparticles

Spherical assembly composed of Mn3O4 nanoparticles with an average diameter of 400-600 nm have been prepared by a simple reactions between Ba(MnO4)2, H2SO4 and MnSO4 and thermal decomposition at 580 °C. The product was characterized by X-ray powder diffraction and scanning electron microscope. The adsorption performance of spherical assembly composed of Mn3O4 for alizarin red was investigated. The adsorbent showed high efficiency for the removal of alizarin red in water. The equilibrium of adsorption was achieved within 8 min. The isotherm adsorption data obeyed the Langmuir model, with a maximum adsorption capacity of 32.8 mg g-1.

Synthesis of and Characterization of Polyhedron of Mn2O3 Nanoparticles Using Spent Zn-Mn Batteries

2015 ◽  
Vol 1120-1121 ◽  
pp. 154-157 ◽  
Author(s):  
Fang Xu ◽  
Jun Xia Yin ◽  
Ming Yang
Keyword(s):  
High Efficiency ◽  
Average Diameter ◽  
Langmuir Model ◽  
Maximum Adsorption Capacity ◽  
X Ray ◽  
Adsorption Performance ◽  
Adsorption Data ◽  
Isotherm Adsorption ◽  
Scanning Electron

Polyhedron composed of Mn2O3nanoparticles with an average diameter of 0.5-1.0 μm have been prepared using spent Zn-Mn batteries. The product was characterized by X-ray powder diffraction and scanning electron microscope. The adsorption performance of polyhedron composed of Mn2O3 for 2-(5-Bromo-2-pyridylazo)-5-(diethylamino) phenol was investigated. The adsorbent showed high efficiency for the removal of 2-(5-Bromo-2-pyridylazo)-5-(diethylamino) phenol in water. The equilibrium of adsorption was achieved within 40 min. The isotherm adsorption data obeyed the Langmuir model, with a maximum adsorption capacity of 62 mg g-1.

Adsorption of Mercury Ion on Activated Carbons from Rice Husk

2012 ◽  
Vol 161 ◽  
pp. 162-166 ◽  
Author(s):  
Xiao Lan SONG ◽  
Ying Zhang ◽  
Cheng Yin Yan ◽  
Wen Juan Jiang ◽  
Hong Jiang Xie
Keyword(s):  
Activated Carbon ◽  
Adsorption Capacity ◽  
Rice Husk ◽  
Activated Carbons ◽  
Langmuir Model ◽  
Mercury Ion ◽  
Maximum Adsorption Capacity ◽  
Adsorption Performance ◽  
Monolayer Adsorption ◽  
Adsorption Data

The adsorption performance of mercury ion onto activated carbon prepared from rice husk with NaOH was carried out at initial concentration of 100 mg/L. The activated carbon obtained at 800 °C possessed the outstanding specific surface area of 2786 m2/g. And the results showed that the maximum adsorption capacity of Hg2+ was recorded as 342.0 mg/g due to abundant micropores of 1.076 nm. In addition, the adsorption data were well explained by the Langmuir model with the monolayer adsorption capacity of 555.6 mg/g.

Preparation of Hydrated Calcium Silicate Gel and its Adsorption Properties for Cu(II)

2020 ◽  
Vol 993 ◽  
pp. 1445-1449
Author(s):  
Shi Jie Liu ◽  
Su Ping Cui ◽  
Hong Xia Guo ◽  
Ya Li Wang ◽  
Nan Li ◽  
...  
Keyword(s):  
Calcium Silicate ◽  
High Efficiency ◽  
Removal Rate ◽  
Low Cost ◽  
Maximum Adsorption Capacity ◽  
X Ray Diffraction ◽  
Adsorption Method ◽  
Hydrated Calcium Silicate ◽  
Adsorption Performance ◽  
Optimum Reaction

Calcium silicate hydrate gel (CSH) was synthesized by calcium acetate and sodium silicate. The structure and morphology of CSH were characterized by X-ray diffraction analysis, Fourier transform infrared spectroscopy and Scanning electron microscopy. The adsorption performance of CSH was measured by static adsorption method. The results show that CSH has porous structure and large specific surface area, and the optimum reaction conditions is the reaction temperature of 25°C and calcium-silicon ratio of 1.2. It has the maximum adsorption capacity of more than 150 mg/g and the removal rate of more than 86% with Cu2+. And it shows the excellent adsorption performance, even when the concentration of Cu2+ is less than 200mg/L, the removal rate is above 90%. The research may provide a low-cost and high-efficiency adsorbent.

scholarly journals Mechanosynthesis of MFe2O4 (M = Co, Ni, and Zn) Magnetic Nanoparticles for Pb Removal from Aqueous Solution

2016 ◽  
Vol 2016 ◽  
pp. 1-9 ◽  
Author(s):  
America R. Vazquez-Olmos ◽  
Mohamed Abatal ◽  
Roberto Y. Sato-Berru ◽  
G. K. Pedraza-Basulto ◽  
Valentin Garcia-Vazquez ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Xrd Analysis ◽  
Maximum Adsorption Capacity ◽  
Sorption Behavior ◽  
Order Kinetic ◽  
X Ray ◽  
Isotherm Adsorption ◽  
Crystallite Sizes ◽  
Langmuir Isotherm Model ◽  
Pseudo Second Order

Adsorption of Pb(II) from aqueous solution using MFe2O4 nanoferrites (M = Co, Ni, and Zn) was studied. Nanoferrite samples were prepared via the mechanochemical method and were characterized by X-ray powder diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), micro-Raman, and vibrating sample magnetometry (VSM). XRD analysis confirms the formation of pure single phases of cubic ferrites with average crystallite sizes of 23.8, 19.4, and 19.2 nm for CoFe2O4, NiFe2O4, and ZnFe2O4, respectively. Only NiFe2O4 and ZnFe2O4 samples show superparamagnetic behavior at room temperature, whereas CoFe2O4 is ferromagnetic. Kinetics and isotherm adsorption studies for adsorption of Pb(II) were carried out. A pseudo-second-order kinetic describes the sorption behavior. The experimental data of the isotherms were well fitted to the Langmuir isotherm model. The maximum adsorption capacity of Pb(II) on the nanoferrites was found to be 20.58, 17.76, and 9.34 mg·g−1 for M = Co, Ni, and Zn, respectively.

Coating Iron Oxides on Kaolinite for the Adsorption of Fluoride

2012 ◽  
Vol 479-481 ◽  
pp. 250-254
Author(s):  
Wen Jun Xiang
Keyword(s):  
Iron Oxides ◽  
Freundlich Isotherm ◽  
Zero Point ◽  
Bet Surface Area ◽  
Maximum Adsorption Capacity ◽  
X Ray Diffraction ◽  
X Ray ◽  
Fluoride Adsorption ◽  
Adsorption Data ◽  
Co Precipitation

Iron oxides-coated kaolinite (Fe-Kaolinite) was prepared by co-precipitation and indentified using X-ray diffraction (XRD). Moreover, the surface properties and fluoride adsorption characteristics of Fe-Kaolinite were investigated and compared with those of kaolinite. Compared to kaolinite, the BET surface area and surface fractal dimension of Fe-Kaolinite increased significantly. The pH at zero point of charge (pHZPC) of kaolinite and Fe-Kaolinite was 3.16 and 6.24, respectively. In the suspensions of pH 6.0, the fitted maximum adsorption capacity (qmax) for fluoride of kaolinite and Fe-Kaolinite was 1.32 and 5.86 mg/g, respectively. The adsorption data for fluoride by Fe-Kaolinite could be fitted using Freundlich isotherm (R2 =0.987), and Langmuir isotherm was very suitable for describing the fluoride adsorption of kaolinite (R2 =0.991).

scholarly journals Assessing the Aflatoxins Mitigation Efficacy of Blueberry Pomace Biosorbent in Buffer, Gastrointestinal Fluids and Model Wine

Toxins ◽  
2020 ◽  
Vol 12 (7) ◽  
pp. 466
Author(s):  
Usman Rasheed ◽  
Qurat Ul Ain ◽  
Muhammad Yaseen ◽  
Sayantan Santra ◽  
Xiaohua Yao ◽  
...  
Keyword(s):  
Maximum Adsorption Capacity ◽  
Kinetics Study ◽  
N2 Adsorption ◽  
Freundlich Model ◽  
X Ray ◽  
Adsorption Performance ◽  
Experimental Parameters ◽  
Facile Fabrication ◽  
Cherry Pomace ◽  
Adsorption Desorption

Blueberry (BB) and cherry pomace were investigated as new biosorbents for aflatoxins (AFs) sequestration from buffered solutions, gastrointestinal fluids and model wine. Among the tested biosorbents, BB exhibited the maximum adsorption performance for AFs and hence was further selected for the optimization of experimental parameters like pH, dosage, time and initial concentration of AFs. Material characterizations via scanning electron microscopy (SEM), Fourier transform infrared (FTIR) spectroscopy, N2 adsorption-desorption isothermal studies, thermogravimetric analysis (TGA) and X-ray photon spectroscopy (XPS) techniques revealed useful information about the texture and chemical composition of the biosorbents. The fitting of isothermal data with different models showed the model suitability trend as: Sips model > Langmuir model > Freundlich model, where the theoretical maximum adsorption capacity calculated from the Sips model was 4.6, 2.9, 2.7 and 2.4 mg/g for AFB1, AFB2, AFG1 and AFG2, respectively. Kinetics study revealed the fast AFs uptake by BB (50–90 min) while thermodynamics studies suggested the exothermic nature of the AFs adsorption from both, single as well as multi-toxin buffer systems, gastrointestinal fluids and model wine. Accrediting to the fast and efficient adsorption performance, green and facile fabrication approach and cost-effectiveness, the newly designed BB pomace can be counted as a promising contender for the sequestration of AFs and other organic pollutants.

Adsorption Characteristic of Steel Slag Haydite for Phosphorus Removal from Wastewater

2013 ◽  
Vol 690-693 ◽  
pp. 1033-1036 ◽  
Author(s):  
Xiao Liu ◽  
Mei Yang ◽  
Yong Yang
Keyword(s):  
Steel Slag ◽  
Phosphate Adsorption ◽  
Maximum Adsorption Capacity ◽  
Order Model ◽  
Adsorption Characteristic ◽  
Adsorption Data ◽  
Isotherm Adsorption ◽  
Intra Particle Diffusion ◽  
Pseudo Second Order ◽  
Increasing Temperature

Slag haydite made from steel slag and clay was used for phosphate adsorption, and adsorption characteristic was studied. Results showed that the uptake of phosphate was facilitated for pH 3-8, the adsorption process fitted with pseudo-second-order model and intra-particle diffusion model, and the equilibrium time was about 3h. Isotherm adsorption data on slag haydite were fitted by both the Freundlich and Langmuir models. It was found that the data follows the Langmuir model better, and the maximum adsorption capacity increased from 1.17mg·g-1 to 2.42mg·g-1 as temperature rose from 20°C to 40°C. Thermodynamic parameters G0, H0 andS0 showed that the adsorption was spontaneous, endothermic and entropy increase process and increasing temperature was favorable.

Preparation of TiO2-ACF by Electrospinning and its Adsorption Performance for Low Concentration SO2

2014 ◽  
Vol 852 ◽  
pp. 51-55 ◽  
Author(s):  
Tie Ben Song ◽  
Yan Bo Wu ◽  
Peng Sun ◽  
Jun Bi
Keyword(s):  
Average Diameter ◽  
Activated Carbon Fiber ◽  
Adsorption Rate ◽  
X Ray Diffraction ◽  
High Adsorption ◽  
Adsorption Time ◽  
X Ray ◽  
Low Concentration ◽  
Adsorption Performance ◽  
Scanning Electron

The TiO2-activated carbon fiber (ACF) was successfully prepared by electrospinning and thermal treatment. The nanofiber was characterized by scanning electron microscopy (SEM), thermogravimetric-differential thermal analysis (TG-DTA), X-ray diffraction (XRD) and Brunner-Emmett-Teller method (BET). The results showed that the average diameter of ACF was in the range 200-500 nm, and the preoxidation temperature and carbonation temperature were 250°C and 500°C, and the anatase TiO2 appeared in fiber after carbonation, and TiO2-ACF specific surface area was 1146.7 m2/g. The TiO2-ACF was used for adsorption of low concentration SO2. The results showed that the adsorption rate increased with an increase in SO2 concentration, furthermore the adsorption rate increased with prolonged adsorption time, the high adsorption rate was 67.6% after 40 min. While temperature was below 60°C, the adsorption rate decreased as the temperature increased, however when temperature was above 60°C, there was a slight increase of adsorption rate as the temperature increased.

Adsorption Removal of Ni(II) from Aqueous Solution by Raw and Acid-Activated Kaolinite

2013 ◽  
Vol 781-784 ◽  
pp. 2269-2272 ◽  
Author(s):  
Shi Yong Wei ◽  
Xu Hong Deng
Keyword(s):  
Cation Exchange Capacity ◽  
Negative Charge ◽  
Physical Adsorption ◽  
Exchange Capacity ◽  
Langmuir Model ◽  
Batch Adsorption ◽  
X Ray Diffraction ◽  
X Ray ◽  
Adsorption Removal ◽  
Adsorption Data

X-ray diffraction (XRD), scanning electron microscopy (SEM), nitrogen physical adsorption, potentiometric titrations and batch adsorption experiments were employed to characterize the crystal structure, micromorphologies and surface properties of raw kaolinite (RKao) and acid-activated kaolinite (AAKao). Compared to RKao, the particle size of AAKao became smaller, but the specific surface area (SSA), cation exchange capacity (CEC) and surface negative charge at pH 5.5 increased. The adsorption capacity (qmax) for Ni (II) of RKao and AAKao was 3.25 mg/g and 5.09 mg/g, respectively. The adsorption data for Ni (II) by RKao and AAKao could be fitted by Langmuir model (R2 =0.991 and 0.989, respectively).

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