scholarly journals New Mussel Inspired Polydopamine-Like Silica-Based Material for Dye Adsorption

Nanomaterials ◽  
2020 ◽  
Vol 10 (7) ◽  
pp. 1416
Author(s):  
Marina Massaro ◽  
Vincenzo Campisciano ◽  
César Viseras Iborra ◽  
Leonarda F. Liotta ◽  
Manuel Sánchez-Polo ◽  
...  
Keyword(s):  
Functional Groups ◽  
Hybrid Material ◽  
Dye Adsorption ◽  
Nanometric Range

A straightforward and economic procedure has been developed for the synthesis of a new polydopamine-like silica-based material that has been obtained by oxidation of catechol with KIO4 followed by reaction with 3-aminopropyltrimethoxysilane. All techniques adopted for characterization showed that the obtained material is rich in different functional groups and the morphological analyses revealed dimensions in the nanometric range. The hybrid material has been characterized by several techniques showing its polydopamine-like nature, and preliminary observations for dye adsorption have been reported.

scholarly journals Effect of Air Oxidation on Texture, Surface Properties and Dye Adsorption of Wood-Derived Porous Carbon Materials

Materials ◽  
2019 ◽  
Vol 12 (10) ◽  
pp. 1675 ◽  
Author(s):  
Suhong Ren ◽  
Liping Deng ◽  
Bo Zhang ◽  
Yafang Lei ◽  
Haiqing Ren ◽  
...  
Keyword(s):  
Surface Area ◽  
Functional Groups ◽  
Porous Carbon ◽  
Carbon Materials ◽  
Dye Adsorption ◽  
Carbon Surface ◽  
Air Oxidation ◽  
Activation Temperature ◽  
Porous Carbon Materials ◽  
Hierarchical Porous

Hierarchical porous carbon materials made from cork were fabricated using a facile and green method combined with air activation, without any templates and chemical agents. The influence of air activation on the texture and other surface characteristics of the carbon materials were evaluated by various characterization techniques. Results indicate that air oxidation can effectively improve the surface area and the hierarchical porous structure of carbon materials, as well as increase the number of oxygen-containing functional groups on the carbon surface. The specific surface area and the pore volume of the carbon material activated by air at 450 °C (C800-M450) can reach 580 m2/g and 0.379 cm3/g, respectively. These values are considerably higher than those for the non-activated material (C800, 376 m2/g, 0.201 cm3/g). The contents of the functional groups (C–O, C=O and O–H) increased with rising activation temperature. After air activation, the adsorption capacity of the carbon materials for methylene blue (MB) and methyl orange (MO) was increased from 7.7 and 6.4 mg/g for C800 to 312.5 and 97.1 mg/g for C800-M450, respectively. The excellent dye removal of the materials suggests that the porous carbon obtained from biomass can be potentially used for wastewater treatment.

Design and preparation of a cellulose-based adsorbent modified by imidazolium ionic liquid functional groups and their studies on anionic dye adsorption

Cellulose ◽  
2018 ◽  
Vol 25 (6) ◽  
pp. 3557-3569 ◽  
Author(s):  
Su-Feng Zhang ◽  
Miao-Xiu Yang ◽  
Li-Wei Qian ◽  
Chen Hou ◽  
Rui-Hua Tang ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Functional Groups ◽  
Dye Adsorption ◽  
Imidazolium Ionic Liquid ◽  
Anionic Dye

scholarly journals Adsorption of congo red dye from aqueous solutions by prepared activated carbon with oxygen-containing functional groups and its regeneration

2018 ◽  
Vol 37 (1-2) ◽  
pp. 160-181 ◽  
Author(s):  
Ridha Lafi ◽  
Imed Montasser ◽  
Amor Hafiane
Keyword(s):  
Activated Carbon ◽  
Functional Groups ◽  
Congo Red ◽  
Contact Time ◽  
Electrostatic Interactions ◽  
Dye Adsorption ◽  
Congo Red Dye ◽  
Equilibrium Data ◽  
Red Dye ◽  
Adsorption Desorption

This study investigates the potential use of activated carbon prepared from coffee waste (CW) as an adsorbent for the removal of congo red dye from aqueous solution. The oxygen-containing groups of activated carbon prepared from CW play an important role in dyes ions adsorption onto activated carbon prepared from CW. The activated carbon is characterized by scanning electron microscopy and Fourier transform infrared (FTIR) spectroscopy. Adsorption experiments were carried out as batch studies at different contact time, pH, and initial dye concentration. The dye adsorption equilibrium was attained after 120 min of contact time. Removal of dye in acidic solutions was better than in basic solutions. The adsorption of dye increased with increasing initial dye concentration. The equilibrium data were revealed that Langmuir model was more suitable to describe the congo red adsorption and demonstrated excellent reusability potential with desorption greater than 90% throughout six consecutive adsorption–desorption cycles. Experimental data founded that kinetics followed a pseudo-second-order equation. Thermodynamic study showed that the adsorption was a spontaneous and exothermic process. According to the FTIR analyses, hydrogen bonding and electrostatic interactions between dyes and oxygen-containing functional groups on activated carbon prepared from CW are dominant mechanisms for dye adsorption.

scholarly journals Bio-adsorption of methylene blue dye using chitosan-extracted from Fenneropenaeus indicus shrimp shell waste

2021 ◽  
Vol 10 (4) ◽  
pp. 146-150
Author(s):  
Kantha D Arunachalam
Keyword(s):  
Methylene Blue ◽  
Functional Groups ◽  
Solid Waste Management ◽  
Dye Adsorption ◽  
Blue Dye ◽  
Batch Adsorption ◽  
Methylene Blue Dye ◽  
Adsorption Method ◽  
Fenneropenaeus Indicus ◽  
Shrimp Shell

The cationic dye “Methylene blue” is widely used in textiles industry, pharmaceuticals, paper industries, and ink manufacturing etc, The washed off dyes discharged directly in water bodies and cause major damage to the environment. The molecule of dye is very stable, so that it is very difficult to decompose naturally. Therefore, it is essential to remove the dye by purifying, and prevent the environment from pollution. The –NH2 and -OH functional groups of Chitosan can induce the adsorbing capacity of dyes by its low surface area, porosity and high crystalline nature. Chitosan is an environment friendly, non-toxic, easily available, biodegradable, renewable biopolymer, and harmless to biota. Extraction of chitosan from the “Fenneropenaeus indicus” (Shrimp) shell and its utilization in wastewater treatment controls the environmental problems and contributes to solid waste management. In this study, the possible use of “Fenneropenaeus indicus” (Shrimp) shell chitosan for the bio-adsorption of MB dye was investigated by a batch adsorption method using different adsorbent doses with respect to experimental duration. The maximum amount of dye adsorption was obtained at a minimum dose of 4gram chitosan, with experimental time of 4 hours. The Fenneropenaeus indicus shell chitosan was found to be a better adsorbent since it removes about 93.23% of methylene blue dye from sample water. Further, characterization of functional groups was also done and the changes of groups were observed from both control and treated samples.

scholarly journals Chemical Modification on Reactive Dye Adsorption Capacity of Castor Seeds

2011 ◽  
Vol 8 (s1) ◽  
pp. S335-S343 ◽  
Author(s):  
V. Dharmalingam ◽  
A. K. Ramasamy ◽  
V. Balasuramanian
Keyword(s):  
Functional Groups ◽  
Functional Group ◽  
Dye Adsorption ◽  
Reactive Dye ◽  
Neutral Red ◽  
Hydroxyl Group ◽  
Hydroxyl Groups ◽  
Anionic Dyes ◽  
Cresyl Blue ◽  
Castor Seeds

Abstract: The roles played by four major functional groups (amine, carboxyl, azo, hydroxyl groups) in the biomass of castor seeds in adsorption of seven dyes were investigated. These functional groups in castor seeds were chemically modified individually to determine their contribution to the adsorption of ionic dyes. The dyes used were remazol red B, procino yellow, fast green FCF, brilliant cresyl blue, methylene blue, neutral red, red-141. It was found that hydroxyl group inhibited the adsorption of anionic dyes but it was major functional group in the adsorption of cationic dyes, hydroxyl group was important functional group in the adsorption of all seven dyes and the effect of methylation of amino group was not significant on the adsorption of seven dyes.

scholarly journals Preparation and dye adsorption properties of an oxygen-rich porous organic polymer

RSC Advances ◽  
2021 ◽  
Vol 11 (26) ◽  
pp. 15921-15926
Author(s):  
Guang Yang ◽  
Huimin Gao ◽  
Qingyin Li ◽  
Shijie Ren
Keyword(s):  
Functional Groups ◽  
Dye Adsorption ◽  
Adsorption Properties ◽  
Porous Polymer ◽  
Organic Polymer ◽  
Hydroxyl Groups ◽  
High Porosity ◽  
Porous Organic Polymer ◽  
Adsorption Performance ◽  
Polar Functional Groups

An oxygen-rich porous polymer containing polar carbonyl and hydroxyl groups, POP-O, was prepared, and the combination of abundant polar functional groups and high porosity endows POP-O with decent dye adsorption performance.

Improving integration between functional groups: A case in organization change and implications for theory and practice

1971 ◽  
Author(s):  
Warren G. Bennis ◽  
Michael Beer ◽  
Gerald R. Pieters ◽  
Alan T. Hundert ◽  
Samuel H. Marcus ◽  
...  
Keyword(s):  
Functional Groups ◽  
Organization Change ◽  
Theory And Practice

Cationic dye adsorption in sugar cane juice

1959 ◽  
Vol 9 (9) ◽  
pp. 482-486
Author(s):  
M. C. Bennett ◽  
D. A. Haydon
Keyword(s):  
Sugar Cane ◽  
Dye Adsorption ◽  
Cationic Dye ◽  
Cane Juice ◽  
Sugar Cane Juice
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