Adsorption Mechanisms of Psychoactive Drugs onto Montmorillonite
Source abstract
Abstract
The adsorption of psychoactive drugs (PADs) onto sodium-exchanged montmorillonite (Na—Mt) was investigated under two pH conditions. At pH = 2.5, the adsorption was performed through cation exchange and the three PADs were intercalated within the Na—Mt layers. However, the adsorption capacity was lower than the theoretical cation exchange capacity of Na—Mt due to the impact of the acidic conditions on the adsorbent. At pH = 7.5, only Codeine was protonated and its adsorption through cation exchange resulted in the highest amount adsorbed among the tested PADs. Diazepam was adsorbed through weak electrostatic interactions, whereas Oxazepam appeared to be intercalated within Na—Mt layers despite its neutral charge. Consequently, the variation in pH strongly impacts the affinity of PADs for Na—Mt. These initial results highlight the impact of raw clay on the fate of these contaminants within environmental compartments and could pave the way for a green solution to the removal of PADs from wastewater effluents.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Therapeutic Uses of Natural Elements · Adsorption and biosorption for pollutant removal
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (27)
Show source-provided references
1. Temporal dynamics of human-excreted pollutants in wastewater treatment plant influents: toward a better knowledge of mass load fluctuations10.1016/j.scitotenv.2017.04.130 ↗
2. Psychiatric pharmaceuticals in the environment10.1016/j.chemosphere.2009.09.021 ↗
3. Record of pharmaceutical products in river sediments: a powerful tool to assess the environmental impact of urban management?10.1016/j.ancene.2017.05.006 ↗
4. Occurrence and removal efficiency of pharmaceuticals in an urban wastewater treatment plant: mass balance, fate and consumption assessment10.1016/j.jece.2017.05.039 ↗
5. Ecological effects of pharmaceuticals in aquatic systems—impacts through behavioural alterations
6. Low cost adsorbents for the removal of organic pollutants from wastewater10.1016/j.jenvman.2012.08.028 ↗
7. Removal of caffeine and diclofenac from aqueous solution by adsorption on multiwalled carbon nanotubes10.1016/j.colcom.2017.11.007 ↗
8. Adsorption of diclofenac onto organoclays: effects of surfactant and environmental (pH and temperature) conditions10.1016/j.jhazmat.2016.05.001 ↗
9. Competitive adsorption of a pool of pharmaceuticals onto a raw clay mineral10.1039/C6RA10655B ↗
10. Adsorption mechanisms of emerging micro-pollutants with a clay mineral: case of tramadol and doxepine pharmaceutical products10.1016/j.jcis.2015.04.029 ↗
11. 7 - organic pollutant adsorption on clay minerals
12. Clayey–sand filter for the removal of pharmaceuticals from wastewater effluent: percolation experiments10.1039/C6EW00034G ↗
13. Analysis and sorption of psychoactive drugs onto sediment10.1021/es702959a ↗
14. Biomedical applications of cationic clay minerals10.1039/C4RA16945J ↗
15. Clay minerals and their beneficial effects upon human health. A review10.1016/S0169-1317(01)00085-0 ↗
16. Hybrid materials based on clays for environmental and biomedical applications10.1039/c0jm00432d ↗
17. Textural and hydration properties of a synthetic montmorillonite compared with a natural Na-exchanged clay analogue10.1016/j.clay.2009.11.038 ↗
18. DrugBank
19. Mechanism of amitriptyline adsorption on Ca-montmorillonite (SAz-2)10.1016/j.jhazmat.2013.12.004 ↗
20. Evaluating the adsorptive capacity of montmorillonitic and calcareous clays on the removal of several heavy metals in aqueous systems10.1016/j.cej.2011.05.015 ↗
21. Enhanced interlayer trapping of a tetracycline antibiotic within montmorillonite layers in the presence of Ca and Mg10.1016/j.jcis.2015.11.027 ↗
22. Surface charge heterogeneity of kaolinite in aqueous suspension in comparison with montmorillonite10.1016/j.clay.2006.05.009 ↗
23. Colloidal behavior of aqueous montmorillonite suspensions: the specific role of pH in the presence of indifferent electrolytes10.1016/j.clay.2004.01.001 ↗
24. Interactions of ammonium smectite with low-molecular-weight carboxylic acids10.1180/claymin.2009.044.2.207 ↗
25. Sorption and desorption of carbamazepine from water by smectite clays10.1016/j.chemosphere.2010.07.053 ↗
26. Tetracycline adsorption on montmorillonite: pH and ionic strength effects10.1016/j.clay.2007.08.003 ↗
27. Structure and dynamics of nonionic surfactant aggregates in layered materials10.1021/acs.langmuir.7b01831 ↗