Open AccessEnhanced Adsorption of Rhodamine B on Modified Oil-Based Drill Cutting Ash: Characterization, Adsorption Kinetics, and Adsorption Isotherm
Author(s) -
Yanyun Zhao,
Yang Hu,
Jinsheng Sun,
Yi Zeng,
Shibin Xia
Publication year - 2021
Publication title -
acs omega
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.779
H-Index - 40
ISSN - 2470-1343
DOI - 10.1021/acsomega.1c02214
Subject(s) - adsorption , freundlich equation , rhodamine b , fourier transform infrared spectroscopy , langmuir adsorption model , chemistry , chemisorption , phosphoric acid , aqueous solution , materials science , nuclear chemistry , langmuir , chemical engineering , inorganic chemistry , organic chemistry , catalysis , photocatalysis , engineering
In this paper, phosphoric acid (H 3 PO 4 ), hydrochloric acid (HCl), and hydrogen peroxide (H 2 O 2 ) were employed for the modification of oil-based drill cutting ash (OBDCA) for the first time. The adsorption of rhodamine B (RhB) on modified oil-based drill cutting ash (MOBDCA) in an aqueous medium was investigated. H 2 O 2 -modified OBDCA had the optimal adsorption efficiency for RhB. The physical and chemical properties of MOBDCA were analyzed using X-ray diffraction (XRD), scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR), ζ-potential, N 2 adsorption-desorption isotherm, and pore size distribution. The effect of the pH value (3-11), reaction time (10-720 min), and initial RhB concentration (10-200 mg/L) on RhB adsorption was discussed. The adsorption kinetics highly fitted with the pseudo-second-order model ( R 2 > 0.99), which indicated that the adsorption process was dominated by chemisorption. The adsorption isotherm fitted well with the Langmuir and Freundlich models ( R 2 > 0.97), which indicated the monolayer adsorption process and the heterogeneous adsorption process, respectively. The theoretic adsorption capacity (50 mg/g) for RhB was achieved by H 2 O 2 -modified OBDCA. This paper provides a promising method of resource utilization of OBDCA to treat organic pollutants.