Comparison study of COD adsorption on bentonite-based nanocomposite materials in landfill leachate treatment: Characterization, Isotherms, Kinetics and Regeneration

Indian Journal of Chemical Technology

article

Hajjizadeh Matin¹  Goodarzvand Chegini Zahra¹  Mehralian Mohammad²  Khashij Maryam² 

[1] Department of Environmental Science, Faculty of Natural Resources and Environment, Science and Research Branch, Islamic Azad University;Environmental Science and Technology Research Center, Department of Environmental Health Engineering, School of Public Health, Shahid Sadoughi University of Medical Sciences

关键词: Bentonite-based nanocomposite;    COD;    Leachate;    Regeneration;    Article;   

DOI  :  10.56042/ijct.v30i3.68031

学科分类：化学（综合）

来源: National Institute of Science Communication and Information Resources

【 摘 要 】

The COD removal from landfill leachate using bentonite-based nanocomposites prepared using different modifiers has been investigated. Different techniques including FE-SEM, XRD, FTIR, TGA and Zeta potential have been utilized for characterization of nanocomposites (NCs). The independent variables includingNCs dose, pH and contact time are studied for COD removal efficiency. The optimal values are obtained to be a NCs dose of 40 g/L, pH of 3.00, and a contact time of 20 min for maximized COD removal efficiencies of 67.90, 71.30 and 52.00% using Arg/CTS-BEN, H/CTS-BEN and CTSBEN NCs, respectively. Kinetics studies fitted well with the pseudo-second order model with rate constants of 25.64, 28.65 and 25.00 mg/g by H/CTS-BEN, Arg/CTS-BEN and CTS-BEN NCs, respectively. The adsorption of the COD is well described by Langmuir equations (R2 0.99). Results show that the synthesized NCs is promising and efficient in purifying landfill leachate.

【 授权许可】

CC BY-NC-ND