Phenol adsorption kinetics and isotherms on coal: effect of particle size

ABSTRACT

This work provided the adsorption method to removal phenol by using different coal particles. The characterization of the adsorbents was analyzed by Camsizer XT, FT-IR, X-ray diffusion and Brunauer-Emmett-Teller and Barrett-Joyner-Halenda. The adsorption capacity presents a linear increase as specific surface area increasing. To reveal the process of the adsorption, the adsorption kinetics and isotherms were performed. Pseudo-second-order was found to best represent the kinetics data, which indicated that the process belongs to chemisorption. The equilibrium isotherms data was analyzed by Langmuir model and Freundlich model, which indicated that the Freundlich model was good fitted for the adsorption processes.

KEYWORDS:

• Adsorption isotherm
• adsorption kinetics
• coal
• particle size
• phenol

Additional information

Funding

This work was supported by the supported by National Natural Science Foundation of China (NO.51604280 and 51504262).

Notes on contributors

Xianfeng Sun

Xianfeng Sun, Ph.D. student, study in China University of Mining and Technology, Beijing, mainly engaged in wastewater treatment and tailings.

Liqiang Ma

Liqiang Ma, professor and doctoral tutor of China University of Mining and Technology, Beijing, mainly engaged in coal flotation, spiral separation and agitation.

Guichuan Ye

Guichuan Ye, Ph.D. student, study in China University of Mining & Technology, Beijing, mainly engaged in coal flotation, solid-liquid mixing, spiral separation, and numerical simulation.

Lun Wu

Lun Wu, Ph.D. student, study in China University of Mining & Technology, Beijing, mainly engaged in the rare earth elements in coal and coal fly ash.

Jihui Li

Jihui Li, associate professor, mainly engaged in fine particles separation, coal flotation, and solid waste treatment.

Hongxiang Xu

Hongxiang Xu, associate professor, mainly engaged in wastewater treatment, minerals processing and solid waste recycling. He presided over a project of the National Natural Science Foundation of China.

Gen Huang

Gen Huang, associate professor, mainly focused on mineral processing, coal separation and utilization, mine and municipal solid waste recycling.