scholarly journals Optimization study of adsorption of crystal violet and congo red onto sepiolite and clinoptiolite

2017 ◽  
Vol 19 (2) ◽  
pp. 336-343 ◽  
Keyword(s):  
Aqueous Solution ◽  
Removal Efficiency ◽  
Crystal Violet ◽  
Congo Red ◽  
Adsorption Properties ◽  
Operating Conditions ◽  
Suitable Material ◽  
Optimization Study ◽  
Red Dye ◽  
Central Composite

The purpose of this study was to investigate the adsorption properties of locally available sepiolite and clinoptilolite materials as adsorbents for the removal of crystal violet and congo red dye ions from aqueous solution. Previous experiments have revealed that two variables, concentration and adsorbent dosage, have a significant effect on removal efficiency. In order to find the set of operating conditions for these variables that result in the best removal efficiency, central composite design of experiments was utilized. The results showed that sepiolite is a suitable material with 99% removal efficiency for the adsorption of both crystal violet and congo red from aqueous solution. However, in spite of clinoptilolite is also a suitable adsorbent for crystal violet, removal efficiency of congo red is rather low.

A new stable luminescent Cd(ii) metal–organic framework with fluorescent sensing and selective dye adsorption properties

2018 ◽  
Vol 47 (28) ◽  
pp. 9466-9473 ◽  
Author(s):  
Wen-Quan Tong ◽  
Wei-Ni Liu ◽  
Jian-Guo Cheng ◽  
Peng-Feng Zhang ◽  
Gao-peng Li ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Congo Red ◽  
Selective Adsorption ◽  
Metal Organic Framework ◽  
Dye Adsorption ◽  
Adsorption Properties ◽  
Carboxyl Groups ◽  
Fluorescent Sensing ◽  
Metal Organic ◽  
Red Dye

A stable Cd-MOF with free carboxyl groups in the channels has been synthesized, showing luminescent sensitivity for Fe3+, CrO42− and Cr2O72− ions in aqueous solution, and selective adsorption of Congo red dye.

Adsorption and Removal of Congo Red Dye from Aqueous Solution by Using Nano-Fe3O4

2012 ◽  
Vol 503-504 ◽  
pp. 262-265 ◽  
Author(s):  
Zhu Xing Tang ◽  
Yin Chen ◽  
Jun Xue ◽  
Shuang Yue
Keyword(s):  
Aqueous Solution ◽  
Congo Red ◽  
Adsorption Properties ◽  
Nano Particles ◽  
Maximum Adsorption Capacity ◽  
X Ray ◽  
Congo Red Dye ◽  
Ft Ir ◽  
Nano Fe3o4 ◽  
Red Dye

In this paper, nano-Fe3O4 as sorbent was used to remove Congo red dye from aqueous solution, in order to investigate its adsorption properties. Fe3O4 nano-particles were synthesized by hydrothermal method, and were characterized by Scanning Electron Microscope (SEM), Fourier Transform Infrared Spectroscopy (FT-IR) and X-ray Powder Diffraction (XRD) to examine their size, morphology and property. The adsorption and removal of Congo red dye from aqueous solution on nano-Fe3O4 was studied in batch equilibrium experiments. These results showed an excellent adsorption capability for Congo red with a maximum adsorption capacity of 1395mg•g-1 at 20°C and pH2.0. It indicates that Fe3O4 nano-particles can be effectively used to remove color from wastewater containing dyes.

Comparative Bio-sorption of Cadmium and Nickel Ions from Aqueous Solution onto Fibers of Date Palm using Fluidized Bed Column

2019 ◽  
Vol 70 (5) ◽  
pp. 1507-1512
Author(s):  
Baker M. Abod ◽  
Ramy Mohamed Jebir Al-Alawy ◽  
Firas Hashim Kamar ◽  
Gheorghe Nechifor
Keyword(s):  
Aqueous Solution ◽  
Heavy Metal ◽  
Metal Ions ◽  
Fluidized Bed ◽  
Removal Efficiency ◽  
Heavy Metal Ions ◽  
Date Palm ◽  
Operating Conditions ◽  
Initial Concentration ◽  
Bed Height

The aim of this study is to use the dry fibers of date palm as low-cost biosorbent for the removal of Cd(II), and Ni(II) ions from aqueous solution by fluidized bed column. The effects of many operating conditions such as superficial velocity, static bed height, and initial concentration on the removal efficiency of metal ions were investigated. FTIR analyses clarified that hydroxyl, amine and carboxyl groups could be very effective for bio-sorption of these heavy metal ions. SEM images showed that dry fibers of date palm have a high porosity and that metal ions can be trapped and sorbed into pores. The results show that a bed height of 6 cm, velocity of 1.1Umf and initial concentration for each heavy metal ions of 50 mg/L are most feasible and give high removal efficiency. The fluidized bed reactor was modeled using ideal plug flow and this model was solved numerically by utilizing the MATLAB software for fitting the measured breakthrough results. The breakthrough curves for metal ions gave the order of bio-sorption capacity as follow: Cd(II)]Ni(II).

scholarly journals Spent Coffee Ground as Low-Cost Adsorbent for Congo Red Dye Removal from Aqueous Solution

2021 ◽  
Vol 765 (1) ◽  
pp. 012089
Author(s):  
R Taufik ◽  
M Mohamad ◽  
R Wannahari ◽  
N F Shoparwe ◽  
WHW Osman ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Congo Red ◽  
Dye Removal ◽  
Low Cost ◽  
Congo Red Dye ◽  
Spent Coffee Ground ◽  
Coffee Ground ◽  
Red Dye

Biosorption of toxic congo red dye from aqueous solution by eco-friendly biosorbentSaccharum bengalense: kinetics and thermodynamics

2013 ◽  
Vol 51 (28-30) ◽  
pp. 5638-5648 ◽  
Author(s):  
Muhammad Imran Din ◽  
Zaib Hussain ◽  
Muhammad Latif Mirza ◽  
Muhammad Makshoof Athar ◽  
Asadullah Madni ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Congo Red ◽  
Kinetics And Thermodynamics ◽  
Congo Red Dye ◽  
Red Dye

scholarly journals Bioremediation of organic dyes using combination of plants ash

2019 ◽  
Vol 7 (2) ◽  
pp. 240-246
Author(s):  
Kaur Harpreet ◽  
Kaur Harpreet ◽  
Vandana Kamboj ◽  
Vandana Kamboj
Keyword(s):  
Aqueous Solution ◽  
Methylene Blue ◽  
Methyl Orange ◽  
Crystal Violet ◽  
Congo Red ◽  
Organic Dyes ◽  
Low Cost ◽  
Sem Image ◽  
Orange Peels

Water is the most crucial thing to mankind and so its contamination by various agencies is posing a threat to the natural balance. So, in the present work, the efficiency of various adsorbents derived from plant waste, to remove different dyes from aqueous solution was evaluated. Parameters for study were contact time, concentration and pH. Various combinations of plant ashes were used for the study. It was found that adsorbent prepared from the combination of orange peels, pomegranate and banana peels ashes, exhibited good adsorption capacity for methylene blue, congo red and crystal violet. All these dyes were completely removed from the aqueous solution while methyl orange was not removed. Congo red was removed completely within 40 min of contact with the adsorbent while methyl orange took 3 hrs to be removed to the extent of 48% only. The adsorption coefficient of congo red was found to be 2.33 while value for methylene blue and crystal violet was 1 and 1.66 respectively. The characterization of adsorbent was done by Scanning Electron Microscopy and IR spectroscopy. SEM image revealed the surface of adsorbent to be made of differential pores. From the results it became evident that the low-cost adsorbent could be used as a replacement for costly traditional methods of removing colorants from water.

scholarly journals Photocatalytical Degradation of Congo Red Azo Dye Using Phosphono-Aminoacid-Cd(II) Pendant Groups Grafted on a Polymeric Support

2019 ◽  
Vol 70 (10) ◽  
pp. 3473-3476 ◽  
Author(s):  
Laura Cocheci ◽  
Lavinia Lupa ◽  
Aniela Pop ◽  
Aurelia Visa ◽  
Bianca Maranescu ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Congo Red ◽  
Azo Dye ◽  
Organic Dyes ◽  
Degradation Process ◽  
Polymer Support ◽  
Polymeric Support ◽  
Vis Spectroscopy ◽  
Red Dye ◽  
Scanning Electron

In the present study, a new compound was used for decontaminating water polluted by Congo Red dye. Phosphono-aminoacid-Cd(II) pendant groups grafted on a polymeric support was prepared using impregnation of a polymer support functionalized with phosphono-aminoacid groups with an aqueous solution of Cd(NO3)2x4H2O. The catalyst was characterized by Fourier transform infrared ray, scanning electron microscope, termogravimetric analysis UV-Vis spectroscopy. The results suggest that the studied material could efficiently be used as photocatalyst in the degradation process of waters containing organic dyes under UV-Vis light irradiation.

Hydroxyapatite nano-rods for the fast removal of congo red dye from aqueous solution

2018 ◽  
Vol 5 (6) ◽  
pp. 065053 ◽  
Author(s):  
Yebin Guan ◽  
Weicheng Cao ◽  
Xiaohong Wang ◽  
Alessandro Marchetti ◽  
Youzhi Tu
Keyword(s):  
Aqueous Solution ◽  
Congo Red ◽  
Congo Red Dye ◽  
Nano Rods ◽  
Red Dye ◽  
Fast Removal
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