Competitive adsorption of the herbicide fluroxypyr and tannic acid from distilled and tap water on activated carbons and their thermal desorption

Adsorption ◽  
2012 ◽  
Vol 18 (3-4) ◽  
pp. 173-179 ◽  
Author(s):  
C. Moreno-Castilla ◽  
M. V. López-Ramón ◽  
L. M. Pastrana-Martínez ◽  
M. A. Álvarez-Merino ◽  
M. A. Fontecha-Cámara
Keyword(s):  
Tannic Acid ◽  
Thermal Desorption ◽  
Competitive Adsorption ◽  
Activated Carbons ◽  
Tap Water

scholarly journals Removal Effect of Atrazine in Co-Solution with Bisphenol A or Humic Acid by Different Activated Carbons

Materials ◽  
2018 ◽  
Vol 11 (12) ◽  
pp. 2558 ◽  
Author(s):  
Zhansheng Wu ◽  
Xinhui Wei ◽  
Yongtao Xue ◽  
Xiufang He ◽  
Xia Yang
Keyword(s):  
Humic Acid ◽  
Bisphenol A ◽  
Adsorption Kinetics ◽  
Competitive Adsorption ◽  
Activated Carbons ◽  
Second Order ◽  
Adsorption Behavior ◽  
Single Solution ◽  
Pseudo Second Order ◽  
Kinetics Of

Activated carbons (ACs) based on apricot shells (AS), wood (W), and walnut shells (WS) were applied to adsorb atrazine in co-solutions. To study the effect of Bisphenol A (BPA) on the adsorption behavior of atrazine, the adsorption performance of ACs for BPA in single solution was studied. The results demonstrated that the adsorption kinetics of BPA fitted the pseudo-second-order model, the adsorption isotherms of BPA followed the Langmuir model. Meanwhile, the adsorption kinetics of atrazine fitted the pseudo-second-order kinetics model and the isotherm was consistent with the Freundlich model both in single solution and co-solution. In addition, competitive adsorption was observed when atrazine coexisted with BPA or humic acid. For the adsorption capacity, the adsorption amount of ASAC, WAC, and WSAC for atrazine obviously decreased by 18.0%, 30.0%, and 30.3% in the presence of BPA, respectively, which was due to the π−π interactions, hydrophobic interactions, and H-bonds, resulting in the competitive adsorption between atrazine and BPA. This study contributes to the further understanding of the adsorption behavior for atrazine in co-solution.

Preparation of granular activated carbons from grape seeds by cycles of liquid phase oxidation and thermal desorption

2014 ◽  
Vol 118 ◽  
pp. 148-155 ◽  
Author(s):  
Diana Jimenez-Cordero ◽  
Francisco Heras ◽  
Noelia Alonso-Morales ◽  
Miguel A. Gilarranz ◽  
Juan J. Rodríguez
Keyword(s):  
Liquid Phase ◽  
Thermal Desorption ◽  
Activated Carbons ◽  
Liquid Phase Oxidation ◽  
Grape Seeds ◽  
Phase Oxidation

Removal of tannic acid from aqueous solutions by activated carbons

1993 ◽  
Vol 52 (1) ◽  
pp. 37-39 ◽  
Author(s):  
J. Rivera-Utrilla ◽  
C. Moreno-Castilla ◽  
E. Utrera-Hidalgo ◽  
F. Carrasco-Marín
Keyword(s):  
Aqueous Solutions ◽  
Tannic Acid ◽  
Activated Carbons

scholarly journals Highly Porous Carbons Synthesized from Tannic Acid via a Combined Mechanochemical Salt-Templating and Mild Activation Strategy

Molecules ◽  
2021 ◽  
Vol 26 (7) ◽  
pp. 1826
Author(s):  
Sylwia Głowniak ◽  
Barbara Szczęśniak ◽  
Jerzy Choma ◽  
Mietek Jaroniec
Keyword(s):  
Specific Surface ◽  
Tannic Acid ◽  
Activated Carbons ◽  
Low Cost ◽  
Chemical Activation ◽  
Total Pore Volume ◽  
Co2 Uptake ◽  
Potassium Oxalate ◽  
Templating Method ◽  
Highly Porous

Highly porous activated carbons were synthesized via the mechanochemical salt-templating method using both sustainable precursors and sustainable chemical activators. Tannic acid is a polyphenolic compound derived from biomass, which, together with urea, can serve as a low-cost, environmentally friendly precursor for the preparation of efficient N-doped carbons. The use of various organic and inorganic salts as activating agents afforded carbons with diverse structural and physicochemical characteristics, e.g., their specific surface areas ranged from 1190 m2·g−1 to 3060 m2·g−1. Coupling the salt-templating method and chemical activation with potassium oxalate appeared to be an efficient strategy for the synthesis of a highly porous carbon with a specific surface area of 3060 m2·g−1, a large total pore volume of 3.07 cm3·g−1 and high H2 and CO2 adsorption capacities of 13.2 mmol·g−1 at −196 °C and 4.7 mmol·g−1 at 0 °C, respectively. The most microporous carbon from the series exhibited a CO2 uptake capacity as high as 6.4 mmol·g−1 at 1 bar and 0 °C. Moreover, these samples showed exceptionally high thermal stability. Such activated carbons obtained from readily available sustainable precursors and activators are attractive for several applications in adsorption and catalysis.

scholarly journals Ni(II) and Cd(II) Simple and Competitive Adsorption on Activated Carbon Oxidized. Influence of the Oxidant Agents HO and NaClO

2015 ◽  
Vol 9 (1) ◽  
pp. 20-27
Author(s):  
Miguel A. Sánchez ◽  
Paola Rodríguez-Estupiñan ◽  
Liliana Giraldo ◽  
Juan Carlos Moreno-Piraján
Keyword(s):  
Activated Carbon ◽  
Surface Area ◽  
Adsorption Isotherms ◽  
Competitive Adsorption ◽  
Gas Adsorption ◽  
Activated Carbons ◽  
Bet Surface Area ◽  
Textural Parameters ◽  
Chemical Groups ◽  
Langmuir And Freundlich Models

In this study, granular activated carbon, GAC, was modified by oxidation with HO and NaClO aqueous solutions and heat treatment at 900°C. The N adsorption isotherms at − 196°C and SEM and FTIR results were used to characterize the properties of the prepared ACs. Textural parameters such as BET surface area and pore volumes were assessed by gas adsorption. The BET surface area values of solids were between 687 and 876 m2g-1. Additionally, immersion enthalpies of activated carbons in benzene, water, hydrochloric acid and sodium hydroxide solutions and Ni(II) and Cd(II) solutions of 500 mgL were determined, with values between 32 and 145 Jg-1. Ni(II) and Cd(II) adsorption isotherms were determined at pH 6 on activated carbons and competitive adsorption tests were realized between the two ions. The results show that in the tests carried out, the adsorption capacity decreased when the content of chemical groups on the surface also decreased. Finally, the experimental results of adsorption from the solution were adjusted to the Langmuir and Freundlich models and the first model was found to be better. With maximum adsorption capacities, the values for Ni(II) were between 3.99 and 64.9 mgg-1 and for Cd(II) were between 2.61 and 55.2 mgg-1. The values of the competitive adsorption ions present in the solution, Ni(II) and Cd(II), in the activated carbons, decreased compared to those obtained in the simple adsorption, indicating the effect of the an ion competitive presence in adsorption another.

scholarly journals Wastewater treatment from washing agricultural machinery by electroflotation and sorption on activated carbons

2021 ◽  
Vol 937 (4) ◽  
pp. 042061
Author(s):  
A Smolyanichenko ◽  
I Kulik ◽  
E Yakovleva
Keyword(s):  
Wastewater Treatment ◽  
Water Supply ◽  
Rice Straw ◽  
Activated Carbons ◽  
Negative Impact ◽  
Tap Water ◽  
Agricultural Waste ◽  
Agricultural Machinery ◽  
Circulating Water ◽  
Car Wash

Abstract Wastewater from car wash stations of agricultural machinery is contaminated with mechanical impurities, oil products, pollution generated by exhaust gases, fertilizers and processing agents used in agriculture, as well as a large amount of surfactants. Purification of this wastewater to the quality required for their reuse allows organizing a circulating water supply scheme, which significantly reduces not only the negative impact on the environment, but also the need for clean tap water. This article describes the results of wastewater treatment from car wash stations of agricultural machinery on an electroflotator and post-treatment by filtration through various filter media, incl. through a sorbent made of modified rice straw - agricultural waste.

Aqueous thermal desorption as an effective way to regenerate spent activated carbons

2014 ◽  
Vol 85 ◽  
pp. 24-30 ◽  
Author(s):  
B. Ledesma ◽  
S. Román ◽  
E. Sabio ◽  
A. Álvarez-Murillo
Keyword(s):  
Thermal Desorption ◽  
Activated Carbons
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