Work

Adsorption Characteristics of Organic Pollutants on Montmorillonites Modified by Quaternary Ammonium Surfactants with Organic Counterions

Year: 2025

Type: article

Abstract: High Resolution Image Download MS PowerPoint Slide Na-montmorillonite (Na-Mt) modified by quaternary ammonium surfactants containing different organic counterions [OMt-QAS·Y –, Y = CH 3 CO 3 –, CH 3 (CH 2 ) 3 COO –, CH 3 CH(OH)COO –, and HCOO – ] was prepared for enhancing the adsorption capacity of 2, 4-dichlorophenol/cibacron brilliant yellow 3G-P. Compared with Na-Mt, whose adsorption efficiency for 2,4-dichlorophenol/cibacron brilliant yellow 3G-P was only 58/1.85 mg/g, the adsorption efficiency of OMt-QAS·Y – was greatly improved, with OMt-QAS·CH 3 CO 3 – having the highest adsorption capacity of 152.85/116.17 mg/g. The kinetic and isotherm studies indicate that all adsorption processes fit well to the pseudo-second-order model and Freundlich model, respectively. The hydrophobicity of counterions and their affinity with the aliphatic chains had an effect on the interlayer spacing and point of zero charge of OMt-QAS·Y –, which in turn affected their adsorption properties.

Source: ACS Omega

DOI: 10.1021/acsomega.4c08924

Authors: Runyu Cao, Bowen Guan, Siqi Hu, Xinru Jia, Hongqin Liu, Baocai Xu

Institutions: Beijing Technology and Business University, China Academy of Chinese Medical Sciences

Language: English

Topic: Adsorption and biosorption for pollutant removal

Subfield: Water Science and Technology

Field: Environmental Science

Domain: Physical Sciences

SDG: Clean water and sanitation

Open Access status: gold

Estimated APC paid: $1,935