scholarly journals Adsorption of Methylene Blue in Water onto Activated Carbon by Surfactant Modification

Water ◽  
2020 ◽  
Vol 12 (2) ◽  
pp. 587 ◽  
Author(s):  
Yu Kuang ◽  
Xiaoping Zhang ◽  
Shaoqi Zhou
Keyword(s):  
Methylene Blue ◽  
Activated Carbon ◽  
Cationic Surfactant ◽  
Anionic Surfactants ◽  
Removal Rate ◽  
Sodium Dodecyl ◽  
Ammonium Bromide ◽  
Lauryl Sulfate ◽  
Cationic Dye ◽  
Adsorption Performance

In this paper, the enhanced adsorption of methylene blue (MB) dye ion on the activated carbon (AC) modified by three surfactants in aqueous solution was researched. Anionic surfactants—sodium lauryl sulfate (SLS) and sodium dodecyl sulfonate (SDS)—and cationic surfactant—hexadecyl trimethyl ammonium bromide (CTAB)—were used for the modification of AC. This work showed that the adsorption performance of cationic dye by activated carbon modified by anionic surfactants (SLS) was significantly improved, whereas the adsorption performance of cationic dye by activated carbon modified by cationic surfactant (CTAB) was reduced. In addition, the effects of initial MB concentration, AC dosage, pH, reaction time, temperature, real water samples, and additive salts on the adsorption were studied. When Na+, K+, Ca2+, NH4+, and Mg2+ were present in the MB dye solution, the effect of these cations was negligible on the adsorption (<5%). The presence of NO2- improved the adsorption performance significantly, whereas the removal rate of MB was reduced in the presence of competitive cation (Fe2+). It was found that the isotherm data had a good correlation with the Langmuir isotherm through analyzing the experimental data by various models. The dynamics of adsorption were better described by the pseudo-second-order model and the adsorption process was endothermic and spontaneous. The results showed that AC modified by anionic surfactant was effective for the adsorption of MB dye in both modeling water and real water.

Iron-Cobalt Magnetic Activated Carbon as an Effective Adsorbent for the Removal of Methylene Blue and Acid Blue 80

NANO ◽  
2021 ◽  
pp. 2150068
Author(s):  
Zhao Yang ◽  
Zhongwei Zhao ◽  
Xuan Yang ◽  
Zongli Ren
Keyword(s):  
Methylene Blue ◽  
Activated Carbon ◽  
Organic Dyes ◽  
Removal Rate ◽  
Recovery Process ◽  
Adsorption Activity ◽  
Magnetic Activated Carbon ◽  
Pseudo Second Order ◽  
Repeated Use ◽  
Acid Blue

For the treatment of dye wastewater, it is of great significance to develop new adsorbents with high adsorption capacity and good separation effect. In this study, the Fe-Co magnetic activated carbon material (CN-Fe-Co-AC) was first prepared by high-temperature calcination. CN-Fe-Co-AC is physically characterized by various methods. CN-Fe-Co-AC can efficiently and quickly remove the organic dyes methylene blue (MB) and acid blue 80 (AB80). The adsorption of MB and acid blue based on CN-Fe-Co-AC adsorbent is mainly through the specific surface area and the functional groups on the surface. During this recovery process, the adsorption activity of CN-Fe-Co-AC for MB and AB80 decreased slightly. Kinetic data can be described using a Pseudo-second-order model and the data for adsorption equilibrium can be described using the Langmuir isotherm. The theoretical adsorption capacities of MB and AB80 are 104.82[Formula: see text]mg/g and 26.94[Formula: see text]mg/g, respectively. After repeated use of five times, the removal rate of MB exceeded 96%, and the removal rate of AB80 exceeded 75%. The excellent adsorption performance and recyclability of CN-Fe-Co-AC indicate that this material has certain potential application value.

Modification and adsorption performance of ultrafine iron matrix composite powder

2014 ◽  
Vol 21 (1) ◽  
pp. 39-47
Author(s):  
Li Zhang ◽  
Yao Ding ◽  
Yu-Juan Liu ◽  
Xi Zheng ◽  
Sheng-Li Liu
Keyword(s):  
Methylene Blue ◽  
Matrix Composite ◽  
Composite Powder ◽  
Milling Time ◽  
Removal Rate ◽  
Weight Ratio ◽  
Slurry Concentration ◽  
Adsorption Performance ◽  
Preparation Conditions ◽  
Optimum Parameters

AbstractUltrafine matrix composite powder was prepared from brown corundum slag, grinding balls, anhydrous ethanol, and modifier using a planetary ball mill. The adsorption material was used for dyeing wastewater treatment. A pH instrument, spectrophotometer, and digital water bath oscillator were used to study the amount of modifier, milling speed, milling time, ball-to-powder weight ratio, and slurry concentration to investigate the effects of preparation conditions on the adsorption performance of adsorbent material. The prepared adsorbents and activated carbon were used to adsorb methylene blue in solution under the same conditions to compare adsorbent dosage, adsorption time, temperature, pH of solution, and initial concentration of methylene blue and to study their effects on methylene blue decolorization rate. The experiment results show that dosage of R of 7.5%, ball-to-powder weight ratio of 14:1, rotational speed of 500 rpm, slurry concentration of 20%, and ball milling time of 2.5 h were the optimum parameters. The composite powder (4 g/l) was added to methylene blue wastewater (35 mg/l), pH was adjusted to 6, and adsorption was carried out for 0.5 h at 30°C. The removal rate reached 99.4%.

Effects of short-term exposure to linear anionic surfactants (SDBS, SLS and SDS) on anammox biomass activity

RSC Advances ◽  
2016 ◽  
Vol 6 (58) ◽  
pp. 53004-53011 ◽  
Author(s):  
Sen Qiao ◽  
Nan Zheng ◽  
Tian Tian ◽  
Cong Yu ◽  
Jiti Zhou
Keyword(s):  
Anionic Surfactants ◽  
Sodium Dodecyl ◽  
Sodium Dodecyl Benzene Sulfonate ◽  
Lauryl Sulfate ◽  
Sodium Dodecyl Sulfonate ◽  
Short Term ◽  
Short Term Exposure ◽  
Biomass Activity ◽  
Dodecyl Benzene Sulfonate ◽  
Anammox Process

This work demonstrates the feasibility of nitrogen removal from wastewater containing linear anionic surfactants, including sodium dodecyl benzene sulfonate, sodium lauryl sulfate and sodium dodecyl sulfonate, by using the anammox process.

Surfactant Mediated Slurry Formulations for Ge CMP Applications

2013 ◽  
Vol 1560 ◽  
Author(s):  
G. Bahar Basim ◽  
Ayse Karagoz ◽  
Long Chen ◽  
Ivan Vakarelski
Keyword(s):  
Material Removal ◽  
Removal Rate ◽  
Sodium Dodecyl ◽  
Ammonium Bromide ◽  
Angle Measurements ◽  
Low Concentrations ◽  
Contact Angle Measurements ◽  
Self Assembled ◽  
Cetyl Trimethyl Ammonium ◽  
Oxidizer Concentration

ABSTRACTIn this study, slurry formulations in the presence of self-assembled surfactant structures were investigated for Ge/SiO2 CMP applications in the absence and presence of oxidizers. Both anionic (sodium dodecyl sulfate-SDS) and cationic (cetyl trimethyl ammonium bromide-C12TAB) micelles were used in the slurry formulations as a function of pH and oxidizer concentration. CMP performances of Ge and SiO2 wafers were evaluated in terms of material removal rates, selectivity and surface quality. The material removal rate responses were also assessed through AFM wear rate tests to obtain a faster response for preliminary analyses. The surfactant adsorption characteristics were studied through surface wettability responses of the Ge and SiO2 wafers through contact angle measurements. It was observed that the self-assembled surfactant structures can help obtain selectivity on the silica/germanium system at low concentrations of the oxidizer in the slurry.

scholarly journals Removal of Methylene Blue from Aqueous Solutions using Chemical Activated CarbonPrepared from Jackfruit (Artocarpusheterophyllus) Peel Waste

2014 ◽  
Vol 5 (1) ◽  
pp. 34-38 ◽  
Author(s):  
T.N.A. Tengku Hasbullah ◽  
O.S. Selaman ◽  
N.A. Rosli
Keyword(s):  
Methylene Blue ◽  
Activated Carbon ◽  
Aqueous Solutions ◽  
Chemical Activation ◽  
Dye Wastewater ◽  
Artocarpus Heterophyllus ◽  
Factors Affecting ◽  
Adsorption Performance ◽  
Industrial Sectors ◽  
Series Of Experiments

Dye wastewater generated is rated as the most polluting wastewater among all the industrial sectors. Adsorption using activated carbon (AC) has been proven to be effective to treat dye wastewater. In this study, jackfruit (Artocarpus heterophyllus) peel waste has been utilized for activated carbon (AC) preparation using chemical activation. This research attempts to study the factors affecting its adsorption performance. Series of experiments conducted consisted of the experiments studying the effect of initial dye concentration and also effect of adsorbent dosage. In the study, CAC showed adsorption capacity of 10.43 mg/g.

Sign in / Sign up

Export Citation Format

Share Document