scholarly journals Methyl Orange Adsorption by Fe2O3@Co-Al-Layered Double Hydroxide

Proceedings ◽  
2020 ◽  
Vol 41 (1) ◽  
pp. 64
Author(s):  
Edris Jamshidi ◽  
Faranak Manteghi
Keyword(s):  
Aqueous Solution ◽  
Methyl Orange ◽  
Layered Double Hydroxide ◽  
Sodium Acetate ◽  
Adsorption Process ◽  
Magnetic Composite ◽  
Trivalent Metal ◽  
Vis Spectroscopy ◽  
Double Hydroxide ◽  
Double Hydroxides

A magnetic composite consisting of iron oxide and a cobalt–aluminum-layered double hydroxide, Fe2O3@Co-Al-layered double hydroxide was prepared through linking of Fe2O3 to Co-Al layered double hydroxide (LDH) by sodium acetate. Layered double hydroxides are generally described as [M2+1–xM3+x(OH)2] [An–x/n·mH2O], where M2+ and M3+ are divalent and trivalent metal cations, respectively, and A is an n-valent interlayer guest anion. The composite was characterized by XRD, FTIR and UV-Vis. spectroscopy methods. Afterwards, the composite was used for methyl-orange adsorption in aqueous solution. The UV–Vis spectrum indicates that the adsorption process was satisfying. In effect, after several washings of the composite, no decrease of the adsorption capacity was observed.

scholarly journals Oxalate Intercalated Mg/Cr Layered Double Hydroxide as Adsorbent of Methyl Red and Methyl Orange From Aqueous Solution

2021 ◽  
Vol 22 (3) ◽  
pp. 71-81
Author(s):  
Arini Fousty Badri ◽  
Novie Juleanti ◽  
Neza Rahayu Palapa ◽  
Yuliza Hanifah ◽  
Risfidian Mohadi ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Methyl Orange ◽  
Layered Double Hydroxide ◽  
Methyl Red ◽  
Double Hydroxide

scholarly journals Removal of Lead from Aqueous Solution by Adsorption using Magnesium Aluminium Hydrogenphosphate Layered Double Hydroxides

2014 ◽  
Vol 8 (1) ◽  
Author(s):  
Zaini Hamzah ◽  
Mohd Najif Ab Rahman ◽  
Yamin Yasin ◽  
Siti Mariam Sumari ◽  
Ahmad Saat
Keyword(s):  
Aqueous Solution ◽  
Layered Double Hydroxide ◽  
Molar Ratio ◽  
Maximum Adsorption Capacity ◽  
Lead Removal ◽  
X Ray Diffraction ◽  
X Ray ◽  
Co Precipitation ◽  
Double Hydroxide ◽  
Double Hydroxides

Layered double hydroxide with molar ratio of 4 (MAN 4) was synthesized by co-precipitation and followed by hydrothermal method. The compound was then later going through ion exchange with K2HPO4 for 48 hours to produce MgAlHPO4 (MAHP 4). The solid produced were characterized using X-ray diffraction (XRD) and Fourier Transform Infrared spectroscopy (FTIR). Adsorption of lead solution by MAHP 4 was carried out using batch experiment by mixing the lead solution and the solid of layered double hydroxide. The effects of various parameters such as contact time, pH, adsorbent dosage and initial concentration were investigated. The optimum pH for lead removal was found to be at pH of 5 and the optimum time of lead removal was found at 2 hours. The isotherm data was analysed using Langmuir and the correlation coefficient of 0.998 was obtained. The maximum adsorption capacity, Qo (mg/g) of 500 mg/g was also recorded from the Langmuir isotherm. The remaining lead solution was determined by using EDXRF (Energy Dispersive X-Ray Fluorescence spectrometry) model MiniPal 4 (PAN analytical). The results in this study indicate that MAHP 4 was an interesting adsorbent for removing lead from aqueous solution.

scholarly journals Removal of Iron(II) Using Ni/Al Layered Double Hydroxide Intercalated with Keggin Ion

Molekul ◽  
2020 ◽  
Vol 15 (3) ◽  
pp. 149
Author(s):  
Aldes Lesbani Lesbani ◽  
Normah Normah ◽  
Neza Rahayu Palapa ◽  
Tarmizi Taher ◽  
Roy Andreas ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Layered Double Hydroxide ◽  
Adsorption Process ◽  
Order Kinetic ◽  
Adsorption Time ◽  
Keggin Ion ◽  
First Order ◽  
Order Kinetic Model ◽  
Pseudo First Order ◽  
Double Hydroxide

Layered double hydroxide (LDH) Ni/Al-NO3 was synthesized using a coprecipitation method under base condition following with intercalation using Keggin ion [a-SiW12O40]4- to form Ni/Al-[a-SiW12O40] LDH. The LDHs were characterized using XRD, FTIR, BET, and pHpzc analyses. Furthermore, LDHs were applied as adsorbent of iron(II) from aqueous solution. The adsorption process was studied through the effect of adsorption time, the concentration of iron(II), and temperature adsorption. The results show the interlayer distance of LDHs was increased from 7.408 Å to 10.533 Å after intercalation process. The adsorption of iron(II) on LDHs showed that adsorption of iron(II) on both LDHs follows pseudo first-order kinetic model with R2 value is close to one. The adsorption process was spontaneous, with adsorption capacity up to 36.496 mg g-1.

The formation mechanism of layered double hydroxide nanoscrolls by facile trinal-phase hydrothermal treatment and their adsorption properties

2015 ◽  
Vol 3 (46) ◽  
pp. 23395-23402 ◽  
Author(s):  
Weiyang Lv ◽  
Miao Du ◽  
Weijuan Ye ◽  
Qiang Zheng
Keyword(s):  
Aqueous Solution ◽  
Methyl Orange ◽  
Hydrothermal Treatment ◽  
Layered Double Hydroxide ◽  
Formation Mechanism ◽  
Treatment Method ◽  
Adsorption Properties ◽  
Excellent Performance ◽  
Double Hydroxide

A facile trinal-phase hydrothermal treatment method is developed for fabricating uniform layered double hydroxide nanoscrolls, which exhibit excellent performance for adsorbing methyl orange in aqueous solution.

scholarly journals Intercalation Zn/Cr Layered Double Hydroxides with K3[𝛼-PW12O40]nH2O and K4[𝛼-SiW12O40]nH2O as Adsorbent of Rhodamine-B

2020 ◽  
Vol 4 (4) ◽  
pp. 109
Author(s):  
Jeri Ramadhan ◽  
Neza Rahayu Palapa ◽  
Tarmizi Taher ◽  
Risfidian Mohadi ◽  
Aldes Lesbani
Keyword(s):  
Free Energy ◽  
Layered Double Hydroxide ◽  
Rhodamine B ◽  
Adsorption Process ◽  
Isotherm Models ◽  
Ft Ir ◽  
Enthalpy And Entropy ◽  
Double Hydroxide ◽  
Double Hydroxides

Synthesis of Zn-Cr layered double hydroxide intercalated with polyoxometalate K3[𝛼-PW12O40]nH2O and K4[𝛼- SiW12O40]nH2O was conducted successfully. The characterization of layered double hydroxide intercalated was performed using XRD and FT-IR analyses. After that layered double hydroxide intercalated used as an adsorbent of rhodamine B (RhB) dye. The results show Rhodamine-B (RhB) more effective adsorbed using the Zn-Cr adsorbent K3[𝛼-PW12O40]nH2O than using an intercalated adsorbent K4[𝛼-SiW12O40]nH2O because the distance between the layers is smaller. Study of kinetics showed that the adsorption process is more fits with PSO than PFO based on coefficients correlation. The adsorption process described by Langmuir isotherm models for all adsorbent. The value of enthalpy and entropy shows that the adsorption process was endothermic and negative free energy value was indicated that the process was spontaneous.

scholarly journals Efficient Removal of Methylene Blue by Adsorption Using Composite Based Ca/Al Layered Double Hydroxide-Biochar

2020 ◽  
Keyword(s):  
Aqueous Solution ◽  
Methylene Blue ◽  
Adsorption Capacity ◽  
Layered Double Hydroxide ◽  
Adsorption Process ◽  
Efficient Removal ◽  
X Ray ◽  
Edx Analyses ◽  
As Adsorption ◽  
Double Hydroxide

<p>Composite based Ca/Al layered double hydroxide and biochar was prepared using mixing coprecipitation method at pH 10. Composite and the starting materials was characterized using X-ray, FTIR, BET, thermal, and SEM-EDX analyses. Furthermore, composite was used as adsorbent of methylene blue from aqueous solution. Several factors that influencing the adsorption process was investigated such as adsorption time, initial concentration, and temperature adsorption. The performance of composite as adsorbent was evaluated by reusability process. The results showed that composite has diffraction peak at 9.82, 17.99, 19.86, 20.55, 29.32, 30.95, 32.65, 36.61, 37.00, 43.49, 47.15, 55.12, and 56.12 deg, which was based on diffraction of Ca/Al layered double hydroxide and biochar as starting materials. The surface area of composite was 158.291 m2/g and largely higher than starting materials. The morphology of composite also shows regularity shape than Ca/Al layered double hydroxide and biochar. Adsorption of methylene blue on composite showed that higher adsorption capacity (32.535 mg/g) than starting materials. The reusability of adsorbent showed that composite can be used several times ad adsorbent without loss adsorption capacity and these phenomena indicated composite is excellent material to remove dye from aqueous solution.</p>

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