Sorption interactions and behavior of bentonite-lignite based composite toward immobilization of dyes, pharmaceuticals and surfactants

• DOI: 10.1016/j.jclepro.2024.143555
• Publication Date: 2024-09-02T16:06:07Z
• Authors: Agnieszka Solińska; Tomasz Bajda; Mariusz Gackowski
• Keywords: Bentonite; Sodium dodecylbenzenesulfonate; Rhodamine B; Clinoptilolite; Cationic polymerization; Cation-exchange capacity

The presence of dyes, pharmaceuticals, and surfactants in the environment results from extensive industrial societal progress, prompting need to explore efficient safe techniques for their removal. Common concentrations wastewater can range micrograms milligrams per liter, which is concerning due persistence potential health impacts. sustainable approach using a nonconventional, eco-friendly mineral-organic composite might address this environmental issue. This study focuses on utilizing bentonite (BEN) lignite (LIG) as sorbent dyes: Rhodamine b (RB), Remazol brilliant blue r (RBBR), pharmaceuticals: ibuprofen (IB), sulfamethoxazole (STX), surfactant: sodium dodecylbenzenesulfonate (SDBS) both synthetic solutions real wastewater. BEN was chosen its high cation exchange capacity, while LIG selected ability adsorb anionic cationic formsdiverse functional groups. with ratio 20:80 (BL 20:80) demonstrated superior sorption capacity. adsorption performance quantified, showing removal efficiencies up 18.9 mg RBBR/g, 22.8 RB/g, 1.77 IB/g, 1.47 STX/g, 4.7 SDBS/g. Sorption efficiency influenced by factors such initial sorbate concentration, pH solution, form sorbates, adsorbents textural, physicochemical (point zero charge pHZPC), ion-exchange hydrophobicity/hydrophilicity) properties. Generally, STX RB favored slightly acidic conditions (pH 4-7), RBBR IB are alkaline >7). complex physical mechanism includes hydrogen bonding, electrostatic dispersion forces, well π-π interactions. Nuclear magnetic resonance spectroscopy (NMR) suggests that significant portion bonding interactions contributes adsorption. indicate specially-designed mineral effectively remove various chemically distinct organic compounds Subsequent investigations will focus granulated BL applicability dynamic column systems. aligns ongoing development purification technologies.