SCI和EI收录∣中国化工学会会刊

Chinese Journal of Chemical Engineering ›› 2020, Vol. 28 ›› Issue (2): 613-623.DOI: 10.1016/j.cjche.2019.04.021

• Materials and Product Engineering • Previous Articles    

Synthesis of activated carbons from black sapote seeds, characterization and application in the elimination of heavy metals and textile dyes

Alejandra Alicia Peláez-Cid1, Vincent Romero-Hernández2, Ana María Herrera-González2, Alejandro Bautista-Hernández1, Oscar Core?o-Alonso3   

  1. 1 Facultad de Ingeniería, Benemérita Universidad Autónoma de Puebla, Mexico;
    2 Instituto de Ciencias Básicas e Ingeniería, Universidad Autónoma del Estado de Hidalgo, Mexico;
    3 División de Ingenierías, Universidad de Guanajuato, Mexico.
  • Received:2019-01-30 Revised:2019-03-19 Online:2020-05-21 Published:2020-02-28
  • Contact: Alejandra Alicia Peláez-Cid
  • Supported by:
    A.A. Peláez C. would like to thank VIEP-BUAP, Mexico for their financial support during the development of the project PECA-ING-17-G. V. Romero H. thanks CONACYT, Mexico for scholarship number 596493. The authors would like to thank H. Welti Peláez for his assistance in the English language.

Synthesis of activated carbons from black sapote seeds, characterization and application in the elimination of heavy metals and textile dyes

Alejandra Alicia Peláez-Cid1, Vincent Romero-Hernández2, Ana María Herrera-González2, Alejandro Bautista-Hernández1, Oscar Core?o-Alonso3   

  1. 1 Facultad de Ingeniería, Benemérita Universidad Autónoma de Puebla, Mexico;
    2 Instituto de Ciencias Básicas e Ingeniería, Universidad Autónoma del Estado de Hidalgo, Mexico;
    3 División de Ingenierías, Universidad de Guanajuato, Mexico.
  • 通讯作者: Alejandra Alicia Peláez-Cid
  • 基金资助:
    A.A. Peláez C. would like to thank VIEP-BUAP, Mexico for their financial support during the development of the project PECA-ING-17-G. V. Romero H. thanks CONACYT, Mexico for scholarship number 596493. The authors would like to thank H. Welti Peláez for his assistance in the English language.

Abstract: Many different techniques may be used to remove industrial pollutants from wastewater. Adsorption using activated carbon has been reported to be an effective method. This work proposes the use of a vegetable residue (black sapote seeds) as a raw material for its synthesis. These carbons were chemically activated using phosphoric acid and carbonized at 673 and 873 K. Adsorption isotherms were constructed for the textile dyes on the carbons, and this data was treated using Langmuir's equation to quantitatively describe the adsorption process. The synthesized carbons were characterized using FTIR, EA, SEM, Nitrogen adsorption (specific surface areas of 879 and 652 m2·g-1), and their points of zero charge (2.1 and 2.3). It was possible to adsorb both heavy metals and textile dyes present in aqueous solutions and wastewaters using these activated carbons. Heavy metals were adsorbed almost completely by both carbons. Cationic dyes where adsorbed (58-59.8 mg·g-1) in greater amounts compared to anionic dyes (10-58.8 mg·g-1). The amount of anionic dyes adsorbed increased almost 30% by changing the pH of the solutions. One of the carbons was thermally regenerated on three occasions without losing its adsorption capacity and it was proved in a flow system.

Key words: Activated carbons, Black sapote seeds, Heavy metal adsorption, Textile dye adsorption, Wastewater treatment

摘要: Many different techniques may be used to remove industrial pollutants from wastewater. Adsorption using activated carbon has been reported to be an effective method. This work proposes the use of a vegetable residue (black sapote seeds) as a raw material for its synthesis. These carbons were chemically activated using phosphoric acid and carbonized at 673 and 873 K. Adsorption isotherms were constructed for the textile dyes on the carbons, and this data was treated using Langmuir's equation to quantitatively describe the adsorption process. The synthesized carbons were characterized using FTIR, EA, SEM, Nitrogen adsorption (specific surface areas of 879 and 652 m2·g-1), and their points of zero charge (2.1 and 2.3). It was possible to adsorb both heavy metals and textile dyes present in aqueous solutions and wastewaters using these activated carbons. Heavy metals were adsorbed almost completely by both carbons. Cationic dyes where adsorbed (58-59.8 mg·g-1) in greater amounts compared to anionic dyes (10-58.8 mg·g-1). The amount of anionic dyes adsorbed increased almost 30% by changing the pH of the solutions. One of the carbons was thermally regenerated on three occasions without losing its adsorption capacity and it was proved in a flow system.

关键词: Activated carbons, Black sapote seeds, Heavy metal adsorption, Textile dye adsorption, Wastewater treatment