Study on the adsorption capacity Congo Red of nanocomposite xCoFe2O4 /(1-x)TiO2-5%La

2021 ◽  
Vol 10 (3) ◽  
pp. xx-xx
Author(s):  
Hue Dang Thi Minh ◽  
Chien Hoang Thi ◽  
Mai Nguyen Thi Tuyet ◽  
Hoang Tran Vinh ◽  
Huyen Tran Thi Thu ◽  
...  
Keyword(s):  
Adsorption Capacity ◽  
Congo Red ◽  
Treatment Process ◽  
Structural Characteristics ◽  
Nanocomposite Materials ◽  
Adsorption Efficiency ◽  
High Adsorption ◽  
Step Procedure ◽  
Co Precipitation ◽  
Hydrothermal Methods

In this paper, nanocomposite materials of xCoFe2O4/(1-x)(TiO2–5%La) (x = 0.2) were synthesized in a two-step procedure, combining a co-precipitation and hydrothermal methods. The morphological and structural characteristics of the material were studied through XRD, SEM, EDS, BET measurements. The materials showed the high adsorption capacity for a organic dye - Congo Red (CGR) . The adsorption efficiency reaches 99.34% after 10 minutes of treatment process, with the amount of adsorbent used is 0.04g /100ml of solution of 32 µmol/l CGR.

Ultra-high adsorption capacity and selective removal of Congo red over aminated graphene oxide modified Mn-doped UiO-66 MOF

2021 ◽  
Vol 379 ◽  
pp. 407-416
Author(s):  
Abdelazeem S. Eltaweil ◽  
Hala M. Elshishini ◽  
Zekry F. Ghatass ◽  
Gehan M. Elsubruiti
Keyword(s):  
Graphene Oxide ◽  
Adsorption Capacity ◽  
Congo Red ◽  
Selective Removal ◽  
High Adsorption ◽  
High Adsorption Capacity ◽  
Mn Doped

scholarly journals Structural Stability of Ni/Al Layered Double Hydroxide Supported on Graphite and Biochar Toward Adorption of Congo Red

2021 ◽  
Vol 6 (2) ◽  
pp. 85-95
Author(s):  
Patimah Mega Syah Bahar Nur Siregar ◽  
Neza Rahayu Palapa ◽  
Alfan Wijaya ◽  
Erni Salasia Fitri ◽  
Aldes Lesbani
Keyword(s):  
Aqueous Solution ◽  
Adsorption Capacity ◽  
Layered Double Hydroxide ◽  
Congo Red ◽  
High Performance ◽  
Precipitation Method ◽  
First Order ◽  
Xrd Diffraction ◽  
Co Precipitation ◽  
Double Hydroxide

In this research, Ni/Al layered double hydroxide (LDH) was modified by using co-precipitation method to generate Ni/Al-graphite (Ni/Al-GF) and Ni/Al-biochar (Ni/Al-BC). The adsorbents were applied to remove Congo Red from aqueous solution. The obtained samples were characterized by using XRD, FTIR, BET and TG-DTA. The XRD diffraction pattern of Ni/Al LDH, Ni/Al-GF, and Ni/Al-BC presented the formation of composite with decreasing crystallinity. The surface area modified LDHs was higher than the pristine materials, which was obtained 15.106 m2/g, 21.595 m2/g and 438.942 m2/g for Ni/Al-LDH, Ni/Al-GF, Ni/Al-BC respectively. The adsorption of Congo Red on the materials was tested at diferent parameters and the results exhibited that Congo Red adsorption on LDHs were pseudo-first-order (PFO) kinetic, spontaneous, endothermic and followed Langmuir model. The adsorbents removed Congo Red by high performance stability with adsorption capacity was 116.297 mg/g for Ni/Al-GF and 312.500 mg/g for Ni/Al-BC. These adsorption capacity was higher than the pristine LDH (61.728 mg/g). The regeneration process which carried out for five cycles showed that Ni/Al-GF and Ni/Al-BC have stable structures as reuse adsorbents for Congo Red from aqueous solution.

Functionalized hollow MnFe2O4 nanospheres: design, applications and mechanism for efficient adsorption of heavy metal ions

2019 ◽  
Vol 43 (15) ◽  
pp. 5879-5889 ◽  
Author(s):  
Chengzhao Jin ◽  
Guixiang Teng ◽  
Yinan Gu ◽  
Hao Cheng ◽  
ShaoPeng Fu ◽  
...  
Keyword(s):  
Heavy Metal ◽  
Metal Ions ◽  
Adsorption Capacity ◽  
Surface Activity ◽  
Heavy Metal Ions ◽  
Contaminated Water ◽  
High Porosity ◽  
Adsorption Efficiency ◽  
High Adsorption

A l-cysteine functionalized magnetic hollow MnFe2O4 nanosphere material has been synthesised, with high magnetism, large interior cavities, and high porosity and surface activity. It has high adsorption efficiency and regenerated adsorption capacity for the removal of Cr6+ and Pb2+ in contaminated water.

Adsorption of arsenic in aqueous solution by RH-Fe-MCM-41

2009 ◽  
Vol 9 (2) ◽  
pp. 121-126 ◽  
Author(s):  
W. Tong-on ◽  
S. Sthiannopkao ◽  
K. W. Kim ◽  
S. Chiarakorn
Keyword(s):  
Aqueous Solution ◽  
Adsorption Capacity ◽  
Molar Ratio ◽  
Adsorption Efficiency ◽  
Equilibrium Time ◽  
Freundlich Isotherms ◽  
Ph Values ◽  
Co Precipitation ◽  
Langmuir Constants ◽  
Mcm 41

RH-Fe-MCM-41 adsorption efficiency and capacity were examined with arsenic in lower concentrations in aqueous solution under varying pH values. The adsorption of arsenite (As3 + ) and arsenate (As5 + ) by RH-Fe-MCM-41 at the molar ratio of Si/Fe 10 gave removal efficiencies of 47% and 99% for As3 +  and As5 + , respectively, in the 100–1,000 μg l−1 concentration range. For the adsorption test of arsenic the best conditions were found to be an equilibrium time of 12 h at pH 7 for As3 +  and 2 h at pH 4 for As5 + . The adsorption capacity by the Langmuir constants (Qm) for As3 +  and As5 +  were 416.67 μg g−1 and 277.78 μg g−1, respectively, while the Freundlich constants (KF) were 0.583 μg g−1 for As3 +  and 112.87 μg g−1 for As5 + . The fit for As5 +  was good with both the Langmuir and Freundlich isotherms by considering the R2 values, which were quite similar (0.916 and 0.912); As3 +  fit well only with the Langmuir isotherm. The impregnation of iron (Fe3 + ) into the RH-Fe-MCM-41 structure increases the adsorption capacity of As3 +  and As5 +  both by oxidizing As3 +  to As5 +  and by co-precipitation with As5 + .

scholarly journals Superb adsorption capacity of biochar derived from leather shavings for Congo red

RSC Advances ◽  
2018 ◽  
Vol 8 (52) ◽  
pp. 29781-29788 ◽  
Author(s):  
Xueping Huang ◽  
Fan Yu ◽  
Qifan Peng ◽  
Yaqin Huang
Keyword(s):  
Adsorption Capacity ◽  
Congo Red ◽  
High Adsorption ◽  
Chemical Interactions ◽  
Adsorption Performance ◽  
Physical And Chemical

Leather shavings biochar can achieve high adsorption performance for Congo red through physical and chemical interactions.

scholarly journals Selective and Recyclable Congo Red Dye Adsorption by Spherical Fe3O4 Nanoparticles Functionalized with 1,2,4,5-Benzenetetracarboxylic Acid

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Sobhan Chatterjee ◽  
Nikita Guha ◽  
Sarathkumar Krishnan ◽  
Amrendra K. Singh ◽  
Pradeep Mathur ◽  
...  
Keyword(s):  
Adsorption Capacity ◽  
Congo Red ◽  
Dye Adsorption ◽  
Kinetic Studies ◽  
Average Diameter ◽  
Adsorption Model ◽  
Mechanism Study ◽  
New Material ◽  
Co Precipitation ◽  
Red Dye

AbstractIn this study, the new material Fe3O4@BTCA has been synthesized by immobilization of 1,2,4,5-Benzenetetracarboxylic acid (BTCA) on the surface of Fe3O4 NPs, obtained by co-precipitation of FeCl3.6H2O and FeCl2.4H2O in the basic conditions. Characterization by P-XRD, FE-SEM, and TEM confirm Fe3O4 has a spherical crystalline structure with an average diameter of 15 nm, which after functionalization with BTCA, increases to 20 nm. Functionalization also enhances the surface area and surface charge of the material, confirmed by BET and zeta potential analyses, respectively. The dye adsorption capacity of Fe3O4@BTCA has been investigated for three common dyes; Congo red (C.R), Methylene blue (M.B), and Crystal violet (C.V). The adsorption studies show that the material rapidly and selectively adsorbs C.R dye with very high adsorption capacity (630 mg/g), which is attributed to strong H-bonding ability of BTCA with C.R dye as indicated by adsorption mechanism study. The material also shows excellent recyclability without any considerable loss of adsorption capacity. Adsorption isotherm and kinetic studies suggest that the adsorption occurs by the Langmuir adsorption model following pseudo-second-order adsorption kinetics.

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