Competitive adsorption removal of indigo carmine and Congo red dyes from residual effluents by Zn2Al-LDH prepared by co-precipitation

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.

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Photodecolourization of congo red dye in presence of Ni3+ layered double hydroxide

BIO Web of Conferences ◽

10.1051/bioconf/20213002010 ◽

2021 ◽

Vol 30 ◽

pp. 02010

Author(s):

Irina Ryltsova ◽

Evgenia Tarasenko ◽

Olga Lebedeva

Keyword(s):

Layered Double Hydroxide ◽

Congo Red ◽

Uv Light ◽

Order Kinetic ◽

X Ray ◽

Congo Red Dye ◽

Order Kinetic Model ◽

Co Precipitation ◽

Red Dye ◽

Double Hydroxide

Layered double hydroxide containing Ni3+ (Mg/AlNi-LDH) was successfully synthesized by co-precipitation in an oxidizing media. The resulted product was characterized using X-ray diffraction, wavelength dispersive X-ray fluorescence spectrometry. The activity of Mg/AlNi-LDH in the process of photodegradation of Congo red dye using UV light irradiation was evaluated. The initial rate of photodegradation of the dye in the presence of LDH is 1.6 times higher than that of UV irradiated solution. The kinetic data obtained for photodegradation process can be adequately described by pseudo-first-order kinetic model. The presence of Mg/AlNi – LDH leads to increased photodegradation yield compared to destruction only by UV irradiation.

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Adsorption removal of Congo red from aqueous solution by polyhedral Cu2O nanoparticles: Kinetics, isotherms, thermodynamics and mechanism analysis

Journal of Alloys and Compounds ◽

10.1016/j.jallcom.2015.02.048 ◽

2015 ◽

Vol 633 ◽

pp. 338-346 ◽

Cited By ~ 118

Author(s):

Jinxia Shu ◽

Zhonghua Wang ◽

Yijiang Huang ◽

Ni Huang ◽

Chunguang Ren ◽

...

Keyword(s):

Aqueous Solution ◽

Congo Red ◽

Mechanism Analysis ◽

Adsorption Removal ◽

Cu2o Nanoparticles

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Adsorption removal of Congo red by epichlorohydrin-modified cross-linked chitosan adsorbent

Desalination and Water Treatment ◽

10.1080/19443994.2015.1060904 ◽

2015 ◽

Vol 57 (30) ◽

pp. 14060-14066 ◽

Cited By ~ 8

Author(s):

Chunguang Li ◽

Jiehu Cui ◽

Fan Wang ◽

Weigong Peng ◽

Yanhong He

Keyword(s):

Congo Red ◽

Adsorption Removal

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

Vietnam Journal of Catalysis and Adsorption ◽

10.51316/jca.2021.041 ◽

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.

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