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Chlorinated volatile organic compounds (CVOCs) and 1,4-dioxane kinetics and equilibrium adsorption studies on selective macrocyclic adsorbents.
Abaie, Elham; Kumar, Manish; Garza-Rubalcava, Uriel; Rao, Balaji; Sun, Yilang; Shen, Yuexiao; Reible, Danny.
Afiliación
  • Abaie E; Department of Civil, Environmental and Construction Engineering, Texas Tech University, Lubbock, TX 79409, United States.
  • Kumar M; Department of Civil, Environmental and Construction Engineering, Texas Tech University, Lubbock, TX 79409, United States.
  • Garza-Rubalcava U; Department of Chemical Engineering, Texas Tech University, Lubbock, TX 79409, United States.
  • Rao B; Department of Civil, Environmental and Construction Engineering, Texas Tech University, Lubbock, TX 79409, United States.
  • Sun Y; Department of Civil, Environmental and Construction Engineering, Texas Tech University, Lubbock, TX 79409, United States.
  • Shen Y; Department of Civil, Environmental and Construction Engineering, Texas Tech University, Lubbock, TX 79409, United States.
  • Reible D; Department of Civil, Environmental and Construction Engineering, Texas Tech University, Lubbock, TX 79409, United States.
Environ Adv ; 162024 Jul.
Article en En | MEDLINE | ID: mdl-39119617
ABSTRACT
Chlorinated volatile organic compounds (CVOCs) are often found in combination with 1,4-dioxane which has been used as a solvent stabilizer. It would be desirable to separate these compounds since biodegradation of 1,4-dioxane follows an aerobic pathway while anaerobic conditions are needed for biodegrading CVOCs. Conventional adsorbents such as activated carbon (AC) and carbonaceous resins have high adsorption capacities for 1,4-dioxane and CVOCs but lack selectivity, limiting their use for separation (Liu et al., 2019). In the current work, two macrocyclic adsorbents, ß-CD-TFN and Res-TFN, were examined for selective adsorption of chlorinated ethenes in the presence of 1,4-dioxane. Both adsorbents exhibited rapid adsorption of the CVOCs and minimal adsorption of 1,4-dioxane. Res-TFN had a higher adsorption capacity for CVOCs than ß-CD-TFN (measured linear partition coefficient, Kd 2140 -9750 L⋅kg-1 versus 192-918 L⋅kg-1 for 1,1, DCE, cis-1,2-DCE and TCE, respectively) and was highly selective for CVOCs(TCE Kd ~117 Kd for 1,4-dioxane). By comparison, TCE and 1,4-dioxane adsorption on AC was approximately equal at 100 µg⋅L-1 and approximately 1/3 of the adsorption of TCE on the Res-TFN. The greater adsorption and selectivity of Res-TFN suggest that it can be used as a selective adsorbent to separate CVOCs from 1,4-dioxane to allow separate biodegradation.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Environ Adv Año: 2024 Tipo del documento: Article País de afiliación: Estados Unidos Pais de publicación: Reino Unido
Texto completo
Añadir a Mi BVS
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XML
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Environ Adv Año: 2024 Tipo del documento: Article País de afiliación: Estados Unidos Pais de publicación: Reino Unido